Merge pull request 'feat: add authentik for authentication' (!58) from feature/authentik into main

Reviewed-on: #58
Reviewed-by: Phan Huy Tran <ptran@noreply.localhost>

README.md

@@ -2,7 +2,7 @@
 
 An online gaming platform offering various casino-style games with virtual currency support. This project features a modern tech stack with Angular frontend, Spring Boot backend, and complete user authentication.
 
-Please refer to our [Style Guide](/frontend/README.md#style-guide) for design guidelines and component standards.
+Please refer to our [Style Guide](https://git.kjan.de/SZUT/casino/wiki/Frontend#design-system) for design guidelines and component standards.
 
 ## Features
 
@@ -67,6 +67,11 @@ cd backend
 ./gradlew bootRun
 ```
 
+You may optionally install [watchexec](https://github.com/watchexec/watchexec?tab=readme-ov-file) and use this command to autorecompile the backend on file changes:
+```bash
+watchexec -r -e java ./gradlew :bootRun
+```
+
 The backend will be available at:
 - API endpoint: http://localhost:8080
 - Swagger documentation: http://localhost:8080/swagger
@@ -164,4 +169,4 @@ References:
 
 ## License
 
-This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

backend/build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
     java
-    id("org.springframework.boot") version "3.4.3"
+    id("org.springframework.boot") version "3.4.4"
     id("io.spring.dependency-management") version "1.1.7"
     id("checkstyle")
 }
@@ -39,7 +39,7 @@ repositories {
 }
 
 dependencies {
-    implementation("com.stripe:stripe-java:20.136.0")
+    implementation("com.stripe:stripe-java:29.0.0")
     implementation("org.springframework.boot:spring-boot-starter-data-jpa")
     implementation("org.springframework.boot:spring-boot-starter-web")
     compileOnly("org.projectlombok:lombok")
@@ -47,10 +47,10 @@ dependencies {
     testImplementation("org.springframework.boot:spring-boot-starter-test")
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")
     implementation("org.springframework.boot:spring-boot-starter-security")
-    implementation("org.springframework.boot:spring-boot-starter-oauth2-resource-server:3.4.3")
-    implementation("org.springframework.boot:spring-boot-starter-oauth2-client:3.4.3")
+    implementation("org.springframework.boot:spring-boot-starter-oauth2-resource-server:3.4.4")
+    implementation("org.springframework.boot:spring-boot-starter-oauth2-client:3.4.4")
     runtimeOnly("org.postgresql:postgresql")
-    implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:2.8.5")
+    implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:2.8.6")
 }
 
 tasks.withType<Test> {

backend/requests/blackjack.http

@@ -0,0 +1,20 @@
+POST http://localhost:8080/blackjack/start
+Authorization: Bearer {{token}}
+Content-Type: application/json
+
+{
+  "betAmount": 1.01
+}
+
+###
+POST http://localhost:8080/blackjack/54/hit
+Authorization: Bearer {{token}}
+
+###
+POST http://localhost:8080/blackjack/202/stand
+Authorization: Bearer {{token}}
+
+###
+GET http://localhost:8080/blackjack/202
+Authorization: Bearer {{token}}
+

backend/requests/getBearerToken.http

@@ -1,6 +1,6 @@
 POST http://localhost:9090/realms/LF12/protocol/openid-connect/token
 Content-Type: application/x-www-form-urlencoded
 
-grant_type=password&client_id=lf12&username=lf12_test_user&password=secret
+grant_type=password&client_id=lf12&username=lf12_test_user&password=secret&scope=openid
 
 > {% client.global.set("token", response.body.access_token); %}

backend/requests/lootboxes.http

@@ -0,0 +1,9 @@
+GET http://localhost:8080/lootboxes
+Authorization: Bearer {{token}}
+Content-Type: application/json
+
+###
+
+POST http://localhost:8080/lootboxes/2
+Authorization: Bearer {{token}}
+Content-Type: application/json

backend/requests/user.http

@@ -12,7 +12,7 @@ Content-Type: application/json
 Authorization: Bearer {{token}}
 
 {
-  "keycloakId": "52cc0208-a3bd-4367-94c5-0404b016a003",
+  "authentikId": "52cc0208-a3bd-4367-94c5-0404b016a003",
   "username": "john.doe"
 }
 

backend/src/main/java/de/szut/casino/CasinoApplication.java

@@ -1,10 +1,20 @@
 package de.szut.casino;
 
+import de.szut.casino.lootboxes.LootBoxEntity;
+import de.szut.casino.lootboxes.LootBoxRepository;
+import de.szut.casino.lootboxes.RewardEntity;
+import de.szut.casino.lootboxes.RewardRepository;
+import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
 import org.springframework.web.client.RestTemplate;
 
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 @SpringBootApplication
 public class CasinoApplication {
 
@@ -16,4 +26,65 @@ public class CasinoApplication {
     public static RestTemplate restTemplate() {
         return new RestTemplate();
     }
+
+    @Bean
+    public CommandLineRunner initData(LootBoxRepository lootBoxRepository, RewardRepository rewardRepository) {
+        return _ -> {
+            if (lootBoxRepository.count() == 0) {
+                LootBoxEntity basicLootBox = new LootBoxEntity();
+                basicLootBox.setName("Basic LootBox");
+                basicLootBox.setPrice(new BigDecimal("2"));
+                basicLootBox.setRewards(new ArrayList<>()); // Initialize the list
+
+                LootBoxEntity premiumLootBox = new LootBoxEntity();
+                premiumLootBox.setName("Premium LootBox");
+                premiumLootBox.setPrice(new BigDecimal("5"));
+                premiumLootBox.setRewards(new ArrayList<>()); // Initialize the list
+
+                lootBoxRepository.saveAll(Arrays.asList(basicLootBox, premiumLootBox));
+
+                RewardEntity commonReward = new RewardEntity();
+                commonReward.setValue(new BigDecimal("0.50"));
+                commonReward.setProbability(new BigDecimal("0.7"));
+
+                RewardEntity rareReward = new RewardEntity();
+                rareReward.setValue(new BigDecimal("2.00"));
+                rareReward.setProbability(new BigDecimal("0.25"));
+
+                RewardEntity epicReward = new RewardEntity();
+                epicReward.setValue(new BigDecimal("5.00"));
+                epicReward.setProbability(new BigDecimal("0.5"));
+
+                RewardEntity premiumCommon = new RewardEntity();
+                premiumCommon.setValue(new BigDecimal("2.00"));
+                premiumCommon.setProbability(new BigDecimal("0.6"));
+
+                RewardEntity premiumRare = new RewardEntity();
+                premiumRare.setValue(new BigDecimal("5.00"));
+                premiumRare.setProbability(new BigDecimal("0.3"));
+
+                RewardEntity legendaryReward = new RewardEntity();
+                legendaryReward.setValue(new BigDecimal("15.00"));
+                legendaryReward.setProbability(new BigDecimal("0.10"));
+
+                rewardRepository.saveAll(Arrays.asList(
+                        commonReward, rareReward, epicReward,
+                        premiumCommon, premiumRare, legendaryReward
+                ));
+
+                basicLootBox.getRewards().add(commonReward);
+                basicLootBox.getRewards().add(premiumRare);
+
+                premiumLootBox.getRewards().add(premiumCommon);
+                premiumLootBox.getRewards().add(premiumRare);
+                premiumLootBox.getRewards().add(legendaryReward);
+
+                lootBoxRepository.saveAll(Arrays.asList(basicLootBox, premiumLootBox));
+
+                System.out.println("Initial LootBoxes and rewards created successfully");
+            } else {
+                System.out.println("LootBoxes already exist, skipping initialization");
+            }
+        };
+    }
 }

backend/src/main/java/de/szut/casino/blackjack/BlackJackGameController.java

@@ -0,0 +1,140 @@
+package de.szut.casino.blackjack;
+
+import de.szut.casino.blackjack.dto.CreateBlackJackGameDto;
+import de.szut.casino.user.UserEntity;
+import de.szut.casino.user.UserService;
+import jakarta.validation.Valid;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+
+@Slf4j
+@RestController
+public class BlackJackGameController {
+
+    private final UserService userService;
+    private final BlackJackService blackJackService;
+
+    public BlackJackGameController(UserService userService, BlackJackService blackJackService) {
+        this.blackJackService = blackJackService;
+        this.userService = userService;
+    }
+
+    @GetMapping("/blackjack/{id}")
+    public ResponseEntity<Object> getGame(@PathVariable Long id, @RequestHeader("Authorization") String token) {
+        Optional<UserEntity> optionalUser = userService.getCurrentUser(token);
+
+        if (optionalUser.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        UserEntity user = optionalUser.get();
+        BlackJackGameEntity game = blackJackService.getBlackJackGame(id);
+        if (game == null || !Objects.equals(game.getUserId(), user.getId())) {
+            return ResponseEntity.notFound().build();
+        }
+
+        return ResponseEntity.ok(game);
+    }
+
+    @PostMapping("/blackjack/{id}/hit")
+    public ResponseEntity<Object> hit(@PathVariable Long id, @RequestHeader("Authorization") String token) {
+        Optional<UserEntity> optionalUser = userService.getCurrentUser(token);
+
+        if (optionalUser.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        UserEntity user = optionalUser.get();
+        BlackJackGameEntity game = blackJackService.getBlackJackGame(id);
+        if (game == null || !Objects.equals(game.getUserId(), user.getId())) {
+            return ResponseEntity.notFound().build();
+        }
+
+        return ResponseEntity.ok(blackJackService.hit(game));
+    }
+
+    @PostMapping("/blackjack/{id}/stand")
+    public ResponseEntity<Object> stand(@PathVariable Long id, @RequestHeader("Authorization") String token) {
+        Optional<UserEntity> optionalUser = userService.getCurrentUser(token);
+
+        if (optionalUser.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        UserEntity user = optionalUser.get();
+        BlackJackGameEntity game = blackJackService.getBlackJackGame(id);
+        if (game == null || !Objects.equals(game.getUserId(), user.getId())) {
+            return ResponseEntity.notFound().build();
+        }
+
+        return ResponseEntity.ok(blackJackService.stand(game));
+    }
+
+    @PostMapping("/blackjack/{id}/doubleDown")
+    public ResponseEntity<Object> doubleDown(@PathVariable Long id, @RequestHeader("Authorization") String token) {
+        Optional<UserEntity> optionalUser = userService.getCurrentUser(token);
+
+        if (optionalUser.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        UserEntity user = optionalUser.get();
+        BlackJackGameEntity game = blackJackService.getBlackJackGame(id);
+        if (game == null || !Objects.equals(game.getUserId(), user.getId())) {
+            return ResponseEntity.notFound().build();
+        }
+
+        return ResponseEntity.ok(blackJackService.doubleDown(game));
+    }
+
+    @PostMapping("/blackjack/{id}/split")
+    public ResponseEntity<Object> split(@PathVariable Long id, @RequestHeader("Authorization") String token) {
+        Optional<UserEntity> optionalUser = userService.getCurrentUser(token);
+
+        if (optionalUser.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        UserEntity user = optionalUser.get();
+        BlackJackGameEntity game = blackJackService.getBlackJackGame(id);
+        if (game == null || !Objects.equals(game.getUserId(), user.getId())) {
+            return ResponseEntity.notFound().build();
+        }
+
+        return ResponseEntity.ok(blackJackService.split(game));
+    }
+
+    @PostMapping("/blackjack/start")
+    public ResponseEntity<Object> createBlackJackGame(@RequestBody @Valid CreateBlackJackGameDto createBlackJackGameDto, @RequestHeader("Authorization") String token) {
+        Optional<UserEntity> optionalUser = userService.getCurrentUser(token);
+
+        if (optionalUser.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        UserEntity user = optionalUser.get();
+        BigDecimal balance = user.getBalance();
+        BigDecimal betAmount = createBlackJackGameDto.getBetAmount();
+
+        if (betAmount.compareTo(BigDecimal.ZERO) <= 0) {
+            Map<String, String> errorResponse = new HashMap<>();
+            errorResponse.put("error", "Invalid bet amount");
+            return ResponseEntity.badRequest().body(errorResponse);
+        }
+
+        if (betAmount.compareTo(balance) > 0) {
+            Map<String, String> errorResponse = new HashMap<>();
+            errorResponse.put("error", "Insufficient funds");
+            return ResponseEntity.badRequest().body(errorResponse);
+        }
+
+        return ResponseEntity.ok(blackJackService.createBlackJackGame(user, betAmount));
+    }
+}

backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java

@@ -0,0 +1,65 @@
+package de.szut.casino.blackjack;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonManagedReference;
+import de.szut.casino.user.UserEntity;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.hibernate.annotations.SQLRestriction;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class BlackJackGameEntity {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "user_id", nullable = false)
+    @JsonIgnore
+    private UserEntity user;
+
+    public Long getUserId() {
+        return user != null ? user.getId() : null;
+    }
+
+    @Enumerated(EnumType.STRING)
+    private BlackJackState state;
+    private BigDecimal bet;
+
+    @OneToMany(mappedBy = "game", cascade = CascadeType.ALL, orphanRemoval = true)
+    @JsonIgnore
+    @SQLRestriction("card_type = 'DECK'")
+    private List<CardEntity> deck = new ArrayList<>();
+
+    @OneToMany(mappedBy = "game", cascade = CascadeType.ALL, orphanRemoval = true)
+    @JsonManagedReference
+    @SQLRestriction("card_type = 'PLAYER'")
+    private List<CardEntity> playerCards = new ArrayList<>();
+
+    @OneToMany(mappedBy = "game", cascade = CascadeType.ALL, orphanRemoval = true)
+    @JsonManagedReference
+    @SQLRestriction("card_type = 'DEALER'")
+    private List<CardEntity> dealerCards = new ArrayList<>();
+
+    @OneToMany(mappedBy = "game", cascade = CascadeType.ALL, orphanRemoval = true)
+    @JsonManagedReference
+    @SQLRestriction("card_type = 'PLAYER_SPLIT'")
+    private List<CardEntity> playerSplitCards = new ArrayList<>();
+
+    @Column(name = "split_bet")
+    private BigDecimal splitBet;
+
+    @Column(name = "is_split")
+    private boolean isSplit;
+}

backend/src/main/java/de/szut/casino/blackjack/BlackJackGameRepository.java

@@ -0,0 +1,12 @@
+package de.szut.casino.blackjack;
+
+import de.szut.casino.user.UserEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.stereotype.Service;
+
+import java.util.Optional;
+
+@Service
+public interface BlackJackGameRepository extends JpaRepository<BlackJackGameEntity, Long> {
+}

backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java

@@ -0,0 +1,310 @@
+package de.szut.casino.blackjack;
+
+import de.szut.casino.user.UserEntity;
+import de.szut.casino.user.UserRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.math.BigDecimal;
+import java.util.List;
+import java.util.Optional;
+import java.util.Random;
+
+@Service
+public class BlackJackService {
+    private final BlackJackGameRepository blackJackGameRepository;
+    private final UserRepository userRepository;
+    private final Random random = new Random();
+
+    public BlackJackService(BlackJackGameRepository blackJackGameRepository, UserRepository userRepository) {
+        this.blackJackGameRepository = blackJackGameRepository;
+        this.userRepository = userRepository;
+    }
+
+    public BlackJackGameEntity getBlackJackGame(Long id) {
+        return blackJackGameRepository.findById(id).orElse(null);
+    }
+
+    @Transactional
+    public BlackJackGameEntity createBlackJackGame(UserEntity user, BigDecimal betAmount) {
+        BlackJackGameEntity game = new BlackJackGameEntity();
+        game.setUser(user);
+        game.setBet(betAmount);
+        
+        initializeDeck(game);
+        dealInitialCards(game);
+        
+        game.setState(getState(game));
+        deductBetFromBalance(user, betAmount);
+        
+        return blackJackGameRepository.save(game);
+    }
+
+    @Transactional
+    public BlackJackGameEntity hit(BlackJackGameEntity game) {
+        if (game.getState() != BlackJackState.IN_PROGRESS) {
+            return game;
+        }
+        
+        dealCardToPlayer(game);
+        
+        updateGameStateAndBalance(game);
+        
+        return blackJackGameRepository.save(game);
+    }
+
+    @Transactional
+    public BlackJackGameEntity stand(BlackJackGameEntity game) {
+        if (game.getState() != BlackJackState.IN_PROGRESS) {
+            return game;
+        }
+        
+        dealCardsToDealerUntilMinimumScore(game);
+        determineWinnerAndUpdateBalance(game);
+        
+        return blackJackGameRepository.save(game);
+    }
+
+    @Transactional
+    public BlackJackGameEntity doubleDown(BlackJackGameEntity game) {
+        if (game.getState() != BlackJackState.IN_PROGRESS || game.getPlayerCards().size() != 2) {
+            return game;
+        }
+        
+        UserEntity user = getUserWithFreshData(game.getUser());
+        BigDecimal additionalBet = game.getBet();
+        
+        deductBetFromBalance(user, additionalBet);
+        game.setBet(game.getBet().add(additionalBet));
+        
+        dealCardToPlayer(game);
+        updateGameStateAndBalance(game);
+        
+        if (game.getState() == BlackJackState.IN_PROGRESS) {
+            return stand(game);
+        }
+        
+        return game;
+    }
+
+    @Transactional
+    public BlackJackGameEntity split(BlackJackGameEntity game) {
+        if (game.getState() != BlackJackState.IN_PROGRESS || 
+            game.getPlayerCards().size() != 2 || 
+            game.isSplit() ||
+            !game.getPlayerCards().get(0).getRank().equals(game.getPlayerCards().get(1).getRank())) {
+            return game;
+        }
+        
+        UserEntity user = getUserWithFreshData(game.getUser());
+        BigDecimal splitBet = game.getBet();
+        
+        if (user.getBalance().compareTo(splitBet) < 0) {
+            return game;
+        }
+        
+        deductBetFromBalance(user, splitBet);
+        game.setSplitBet(splitBet);
+        game.setSplit(true);
+        
+        CardEntity card = game.getPlayerCards().remove(1);
+        card.setCardType(CardType.PLAYER_SPLIT);
+        game.getPlayerSplitCards().add(card);
+        
+        dealCardToPlayer(game);
+        dealCardToSplitHand(game);
+        
+        return blackJackGameRepository.save(game);
+    }
+
+    private BlackJackGameEntity refreshGameState(BlackJackGameEntity game) {
+        return blackJackGameRepository.findById(game.getId()).orElse(game);
+    }
+    
+    private UserEntity getUserWithFreshData(UserEntity user) {
+        return userRepository.findById(user.getId()).orElse(user);
+    }
+    
+    private void dealInitialCards(BlackJackGameEntity game) {
+        for (int i = 0; i < 2; i++) {
+            dealCardToPlayer(game);
+        }
+        
+        dealCardToDealer(game);
+    }
+    
+    private void dealCardToPlayer(BlackJackGameEntity game) {
+        CardEntity card = drawCardFromDeck(game);
+        card.setCardType(CardType.PLAYER);
+        game.getPlayerCards().add(card);
+    }
+    
+    private void dealCardToDealer(BlackJackGameEntity game) {
+        CardEntity card = drawCardFromDeck(game);
+        card.setCardType(CardType.DEALER);
+        game.getDealerCards().add(card);
+    }
+    
+    private void dealCardsToDealerUntilMinimumScore(BlackJackGameEntity game) {
+        while (calculateHandValue(game.getDealerCards()) < 17) {
+            dealCardToDealer(game);
+        }
+    }
+    
+    private void dealCardToSplitHand(BlackJackGameEntity game) {
+        CardEntity card = drawCardFromDeck(game);
+        card.setCardType(CardType.PLAYER_SPLIT);
+        game.getPlayerSplitCards().add(card);
+    }
+    
+    private void updateGameStateAndBalance(BlackJackGameEntity game) {
+        if (game.isSplit()) {
+            int mainHandValue = calculateHandValue(game.getPlayerCards());
+            int splitHandValue = calculateHandValue(game.getPlayerSplitCards());
+            
+            if (mainHandValue > 21 && splitHandValue > 21) {
+                game.setState(BlackJackState.PLAYER_LOST);
+                updateUserBalance(game, false);
+            } else if (mainHandValue <= 21 && splitHandValue <= 21) {
+                game.setState(BlackJackState.IN_PROGRESS);
+            } else {
+                game.setState(BlackJackState.IN_PROGRESS);
+            }
+        } else {
+            game.setState(getState(game));
+            
+            if (game.getState() == BlackJackState.PLAYER_WON) {
+                updateUserBalance(game, true);
+            } else if (game.getState() == BlackJackState.PLAYER_LOST) {
+                updateUserBalance(game, false);
+            }
+        }
+    }
+    
+    private void determineWinnerAndUpdateBalance(BlackJackGameEntity game) {
+        int playerValue = calculateHandValue(game.getPlayerCards());
+        int dealerValue = calculateHandValue(game.getDealerCards());
+
+        if (dealerValue > 21 || playerValue > dealerValue) {
+            game.setState(BlackJackState.PLAYER_WON);
+            updateUserBalance(game, true);
+        } else if (playerValue < dealerValue) {
+            game.setState(BlackJackState.PLAYER_LOST);
+            updateUserBalance(game, false);
+        } else {
+            game.setState(BlackJackState.DRAW);
+            updateUserBalance(game, false);
+        }
+    }
+    
+    private void deductBetFromBalance(UserEntity user, BigDecimal betAmount) {
+        user.setBalance(user.getBalance().subtract(betAmount));
+        userRepository.save(user);
+    }
+
+    @Transactional
+    private void updateUserBalance(BlackJackGameEntity game, boolean isWin) {
+        UserEntity user = getUserWithFreshData(game.getUser());
+        BigDecimal totalBet = game.getBet();
+        BigDecimal balance = user.getBalance();
+        
+        if (game.isSplit()) {
+            totalBet = totalBet.add(game.getSplitBet());
+            
+            if (isWin) {
+                int mainHandValue = calculateHandValue(game.getPlayerCards());
+                int splitHandValue = calculateHandValue(game.getPlayerSplitCards());
+                int dealerValue = calculateHandValue(game.getDealerCards());
+                
+                if (mainHandValue <= 21 && (dealerValue > 21 || mainHandValue > dealerValue)) {
+                    balance = balance.add(game.getBet().multiply(BigDecimal.valueOf(2)));
+                } else if (mainHandValue == dealerValue) {
+                    balance = balance.add(game.getBet());
+                }
+                
+                if (splitHandValue <= 21 && (dealerValue > 21 || splitHandValue > dealerValue)) {
+                    balance = balance.add(game.getSplitBet().multiply(BigDecimal.valueOf(2)));
+                } else if (splitHandValue == dealerValue) {
+                    balance = balance.add(game.getSplitBet());
+                }
+            } else if (game.getState() == BlackJackState.DRAW) {
+                balance = balance.add(totalBet);
+            }
+        } else {
+            if (isWin) {
+                balance = balance.add(totalBet.multiply(BigDecimal.valueOf(2)));
+            } else if (game.getState() == BlackJackState.DRAW) {
+                balance = balance.add(totalBet);
+            }
+        }
+        
+        user.setBalance(balance);
+        userRepository.save(user);
+    }
+
+    private void initializeDeck(BlackJackGameEntity game) {
+        for (Suit suit : Suit.values()) {
+            for (Rank rank : Rank.values()) {
+                CardEntity card = new CardEntity();
+                card.setGame(game);
+                card.setSuit(suit);
+                card.setRank(rank);
+                card.setCardType(CardType.DECK);
+                game.getDeck().add(card);
+            }
+        }
+
+        java.util.Collections.shuffle(game.getDeck(), random);
+    }
+
+    private CardEntity drawCardFromDeck(BlackJackGameEntity game) {
+        if (game.getDeck().isEmpty()) {
+            throw new IllegalStateException("Deck is empty");
+        }
+
+        return game.getDeck().removeFirst();
+    }
+
+    private BlackJackState getState(BlackJackGameEntity game) {
+        int playerHandValue = calculateHandValue(game.getPlayerCards());
+
+        if (playerHandValue == 21) {
+            CardEntity hole = drawCardFromDeck(game);
+            hole.setCardType(CardType.DEALER);
+            game.getDealerCards().add(hole);
+
+            int dealerHandValue = calculateHandValue(game.getDealerCards());
+
+            if (dealerHandValue == 21) {
+                return BlackJackState.DRAW;
+            } else {
+                BigDecimal blackjackWinnings = game.getBet().multiply(new BigDecimal("1.5"));
+                UserEntity user = getUserWithFreshData(game.getUser());
+                user.setBalance(user.getBalance().add(blackjackWinnings));
+                return BlackJackState.PLAYER_BLACKJACK;
+            }
+        } else if (playerHandValue > 21) {
+            return BlackJackState.PLAYER_LOST;
+        }
+
+        return BlackJackState.IN_PROGRESS;
+    }
+
+    private int calculateHandValue(List<CardEntity> hand) {
+        int sum = 0;
+        int aceCount = 0;
+        for (CardEntity card : hand) {
+            sum += card.getRank().getValue();
+            if (card.getRank() == Rank.ACE) {
+                aceCount++;
+            }
+        }
+
+        while (sum > 21 && aceCount > 0) {
+            sum -= 10;
+            aceCount--;
+        }
+
+        return sum;
+    }
+}

backend/src/main/java/de/szut/casino/blackjack/BlackJackState.java

@@ -0,0 +1,9 @@
+package de.szut.casino.blackjack;
+
+public enum BlackJackState {
+    IN_PROGRESS,
+    PLAYER_BLACKJACK,
+    PLAYER_LOST,
+    PLAYER_WON,
+    DRAW,
+}

backend/src/main/java/de/szut/casino/blackjack/CardEntity.java

@@ -0,0 +1,40 @@
+package de.szut.casino.blackjack;
+
+import com.fasterxml.jackson.annotation.JsonBackReference;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Entity
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class CardEntity {
+    @Id
+    @GeneratedValue
+    @JsonIgnore
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "game_id", nullable = false)
+    @JsonBackReference
+    private BlackJackGameEntity game;
+
+    @Enumerated(EnumType.STRING)
+    private Suit suit;
+
+    @Enumerated(EnumType.STRING)
+    private Rank rank;
+
+    @Enumerated(EnumType.STRING)
+    @JsonIgnore
+    private CardType cardType;
+}
+
+enum CardType {
+    DECK, PLAYER, DEALER, PLAYER_SPLIT
+}

backend/src/main/java/de/szut/casino/blackjack/Rank.java

@@ -0,0 +1,31 @@
+package de.szut.casino.blackjack;
+
+import lombok.Getter;
+
+@Getter
+public enum Rank {
+    TWO("2", "Two", 2),
+    THREE("3", "Three", 3),
+    FOUR("4", "Four", 4),
+    FIVE("5", "Five", 5),
+    SIX("6", "Six", 6),
+    SEVEN("7", "Seven", 7),
+    EIGHT("8", "Eight", 8),
+    NINE("9", "Nine", 9),
+    TEN("10", "Ten", 10),
+    JACK("J", "Jack", 10),
+    QUEEN("Q", "Queen", 10),
+    KING("K", "King", 10),
+    ACE("A", "Ace", 11);
+
+    private final String symbol;
+    private final String displayName;
+    private final int value;
+
+    Rank(String symbol, String displayName, int value) {
+        this.symbol = symbol;
+        this.displayName = displayName;
+        this.value = value;
+    }
+
+}

backend/src/main/java/de/szut/casino/blackjack/Suit.java

@@ -0,0 +1,20 @@
+package de.szut.casino.blackjack;
+
+import lombok.Getter;
+
+@Getter
+public enum Suit {
+    HEARTS("H", "Hearts"),
+    DIAMONDS("D", "Diamonds"),
+    CLUBS("C", "Clubs"),
+    SPADES("S", "Spades");
+
+    private final String symbol;
+    private final String displayName;
+
+    Suit(String symbol, String displayName) {
+        this.symbol = symbol;
+        this.displayName = displayName;
+    }
+
+}

backend/src/main/java/de/szut/casino/blackjack/dto/CreateBlackJackGameDto.java

@@ -0,0 +1,16 @@
+package de.szut.casino.blackjack.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.math.BigDecimal;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class CreateBlackJackGameDto {
+    private BigDecimal betAmount;
+}

backend/src/main/java/de/szut/casino/deposit/DepositController.java

@@ -47,15 +47,19 @@ public class DepositController {
     public ResponseEntity<SessionIdDto> checkout(@RequestBody @Valid AmountDto amountDto, @RequestHeader("Authorization") String token) throws StripeException {
         Stripe.apiKey = stripeKey;
 
-        KeycloakUserDto userData = getKeycloakUserInfo(token);
-        Optional<UserEntity> optionalUserEntity = this.userRepository.findOneByKeycloakId(userData.getSub());
+        KeycloakUserDto userData = getAuthentikUserInfo(token);
+        Optional<UserEntity> optionalUserEntity = this.userRepository.findOneByAuthentikId(userData.getSub());
 
         SessionCreateParams params = SessionCreateParams.builder()
                 .addLineItem(SessionCreateParams.LineItem.builder()
-                        .setAmount((long) amountDto.getAmount() * 100)
-                        .setCurrency("EUR")
+                        .setPriceData(SessionCreateParams.LineItem.PriceData.builder()
+                                .setCurrency("EUR")
+                                .setUnitAmount((long) amountDto.getAmount() * 100)
+                                .setProductData(SessionCreateParams.LineItem.PriceData.ProductData.builder()
+                                        .setName("Einzahlung")
+                                        .build())
+                                .build())
                         .setQuantity(1L)
-                        .setName("Einzahlung")
                         .build())
                 .setSuccessUrl(frontendHost+"/home?success=true")
                 .setCancelUrl(frontendHost+"/home?success=false")
@@ -73,10 +77,10 @@ public class DepositController {
         return ResponseEntity.ok(new SessionIdDto(session.getId()));
     }
 
-    private KeycloakUserDto getKeycloakUserInfo(String token) {
+    private KeycloakUserDto getAuthentikUserInfo(String token) {
         HttpHeaders headers = new HttpHeaders();
         headers.set("Authorization", token);
-        ResponseEntity<KeycloakUserDto> response = this.restTemplate.exchange("http://localhost:9090/realms/LF12/protocol/openid-connect/userinfo", HttpMethod.GET, new HttpEntity<>(headers), KeycloakUserDto.class);
+        ResponseEntity<KeycloakUserDto> response = this.restTemplate.exchange("https://oauth.simonis.lol/application/o/userinfo/", HttpMethod.GET, new HttpEntity<>(headers), KeycloakUserDto.class);
 
         return response.getBody();
     }

backend/src/main/java/de/szut/casino/deposit/TransactionService.java

@@ -40,7 +40,7 @@ public class TransactionService {
                 .build();
         Session checkoutSession = Session.retrieve(sessionID, params, null);
 
-        if (!Objects.equals(checkoutSession.getPaymentStatus(), "paid")) {
+        if (!"paid".equals(checkoutSession.getPaymentStatus())) {
             return;
         }
 
@@ -53,10 +53,12 @@ public class TransactionService {
         transaction.setStatus(TransactionStatus.SUCCEEDED);
 
         UserEntity user = transaction.getUser();
-        user.addBalance(checkoutSession.getAmountTotal());
+        Long amountTotal = checkoutSession.getAmountTotal();
+        if (amountTotal != null) {
+            user.addBalance(amountTotal);
+        }
 
         userRepository.save(user);
         transactionRepository.save(transaction);
     }
-
 }

backend/src/main/java/de/szut/casino/deposit/WebhookController.java

@@ -51,12 +51,18 @@ public class WebhookController {
         switch (event.getType()) {
             case "checkout.session.completed":
             case "checkout.session.async_payment_succeeded":
-                Session session = (Session) event.getData().getObject();
-
-                this.transactionService.fulfillCheckout(session.getId());
+                EventDataObjectDeserializer dataObjectDeserializer = event.getDataObjectDeserializer();
+                
+                if (dataObjectDeserializer.getObject().isPresent()) {
+                    Session session = (Session) dataObjectDeserializer.getObject().get();
+                    this.transactionService.fulfillCheckout(session.getId());
+                } else {
+                    logger.error("Failed to deserialize webhook event data");
+                }
                 break;
             default:
-
+                // No action needed for other event types
+                break;
         }
 
         return ResponseEntity.ok().body(null);

backend/src/main/java/de/szut/casino/lootboxes/LootBoxController.java

@@ -0,0 +1,58 @@
+package de.szut.casino.lootboxes;
+
+import de.szut.casino.user.UserEntity;
+import de.szut.casino.user.UserRepository;
+import de.szut.casino.user.UserService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+@RestController
+public class LootBoxController {
+    private final LootBoxRepository lootBoxRepository;
+    private final UserService userService;
+    private final LootBoxService lootBoxService;
+
+    public LootBoxController(LootBoxRepository lootBoxRepository, UserRepository userRepository, UserService userService, LootBoxService lootBoxService) {
+        this.lootBoxRepository = lootBoxRepository;
+        this.userService = userService;
+        this.lootBoxService = lootBoxService;
+    }
+
+    @GetMapping("/lootboxes")
+    public List<LootBoxEntity> getAllLootBoxes() {
+        return lootBoxRepository.findAll();
+    }
+
+    @PostMapping("/lootboxes/{id}")
+    public ResponseEntity<Object> purchaseLootBox(@PathVariable Long id, @RequestHeader("Authorization") String token) {
+        Optional<LootBoxEntity> optionalLootBox = lootBoxRepository.findById(id);
+        if (optionalLootBox.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        LootBoxEntity lootBox = optionalLootBox.get();
+
+        Optional<UserEntity> optionalUser = userService.getCurrentUser(token);
+        if (optionalUser.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        UserEntity user = optionalUser.get();
+
+        if (lootBoxService.hasSufficientBalance(user, lootBox.getPrice())) {
+            Map<String, String> errorResponse = new HashMap<>();
+            errorResponse.put("error", "Insufficient balance");
+            return ResponseEntity.badRequest().body(errorResponse);
+        }
+
+        RewardEntity reward = lootBoxService.determineReward(lootBox);
+        lootBoxService.handleBalance(user, lootBox, reward);
+
+        return ResponseEntity.ok(reward);
+    }
+}

backend/src/main/java/de/szut/casino/lootboxes/LootBoxEntity.java

@@ -0,0 +1,40 @@
+package de.szut.casino.lootboxes;
+
+import com.fasterxml.jackson.annotation.JsonBackReference;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonManagedReference;
+import de.szut.casino.blackjack.CardEntity;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.hibernate.annotations.SQLRestriction;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class LootBoxEntity {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+
+    @Column(precision = 19, scale = 2)
+    private BigDecimal price;
+
+    @ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE})
+    @JoinTable(
+            name = "lootbox_reward",
+            joinColumns = @JoinColumn(name = "lootbox_id"),
+            inverseJoinColumns = @JoinColumn(name = "reward_id")
+    )
+    private List<RewardEntity> rewards = new ArrayList<>();
+}

backend/src/main/java/de/szut/casino/lootboxes/LootBoxRepository.java

@@ -0,0 +1,8 @@
+package de.szut.casino.lootboxes;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Service;
+
+@Service
+public interface LootBoxRepository extends JpaRepository<LootBoxEntity, Long> {
+}

backend/src/main/java/de/szut/casino/lootboxes/LootBoxService.java

@@ -0,0 +1,40 @@
+package de.szut.casino.lootboxes;
+
+import de.szut.casino.user.UserEntity;
+import de.szut.casino.user.UserRepository;
+import org.springframework.stereotype.Service;
+
+import java.math.BigDecimal;
+
+@Service
+public class LootBoxService {
+    private final UserRepository userRepository;
+
+    public LootBoxService(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    public boolean hasSufficientBalance(UserEntity user, BigDecimal price) {
+        return user.getBalance().compareTo(price) < 0;
+    }
+
+    public RewardEntity determineReward(LootBoxEntity lootBox) {
+        double randomValue = Math.random();
+        BigDecimal cumulativeProbability = BigDecimal.ZERO;
+
+        for (RewardEntity reward : lootBox.getRewards()) {
+            cumulativeProbability = cumulativeProbability.add(reward.getProbability());
+            if (randomValue <= cumulativeProbability.doubleValue()) {
+                return reward;
+            }
+        }
+
+        return lootBox.getRewards().getLast();
+    }
+
+    public void handleBalance(UserEntity user, LootBoxEntity lootBox, RewardEntity reward) {
+        user.setBalance(user.getBalance().subtract(lootBox.getPrice()));
+        user.setBalance(user.getBalance().add(reward.getValue()));
+        userRepository.save(user);
+    }
+}

backend/src/main/java/de/szut/casino/lootboxes/RewardEntity.java

@@ -0,0 +1,30 @@
+package de.szut.casino.lootboxes;
+
+import com.fasterxml.jackson.annotation.JsonBackReference;
+import com.fasterxml.jackson.annotation.JsonManagedReference;
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+@Getter
+@Setter
+@Entity
+public class RewardEntity {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column(precision = 19, scale = 2)
+    private BigDecimal value;
+
+    @Column(precision = 5, scale = 2)
+    private BigDecimal probability;
+
+    @ManyToMany(mappedBy = "rewards")
+    @JsonBackReference
+    private List<LootBoxEntity> lootBoxes = new ArrayList<>();
+}

backend/src/main/java/de/szut/casino/lootboxes/RewardRepository.java

@@ -0,0 +1,8 @@
+package de.szut.casino.lootboxes;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Service;
+
+@Service
+public interface RewardRepository extends JpaRepository<RewardEntity, Long> {
+}

backend/src/main/java/de/szut/casino/security/CustomJwtAuthenticationConverter.java

@@ -0,0 +1,24 @@
+package de.szut.casino.security;
+
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.security.authentication.AbstractAuthenticationToken;
+import org.springframework.security.oauth2.jwt.Jwt;
+import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationConverter;
+import org.springframework.security.oauth2.server.resource.authentication.JwtGrantedAuthoritiesConverter;
+
+public class CustomJwtAuthenticationConverter implements Converter<Jwt, AbstractAuthenticationToken> {
+    
+    @Override
+    public AbstractAuthenticationToken convert(Jwt source) {
+        JwtGrantedAuthoritiesConverter authoritiesConverter = new JwtGrantedAuthoritiesConverter();
+        JwtAuthenticationConverter converter = new JwtAuthenticationConverter();
+        converter.setJwtGrantedAuthoritiesConverter(authoritiesConverter);
+
+        return converter.convert(source);
+    }
+
+    public <U> Converter<Jwt, U> andThen(Converter<? super AbstractAuthenticationToken, ? extends U> after) {
+        return Converter.super.andThen(after);
+    }
+}
+

backend/src/main/java/de/szut/casino/security/KeycloakLogoutHandler.java

@@ -1,48 +0,0 @@
-package de.szut.casino.security;
-
-import jakarta.servlet.http.HttpServletRequest;
-import jakarta.servlet.http.HttpServletResponse;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.http.ResponseEntity;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.oauth2.core.oidc.user.OidcUser;
-import org.springframework.security.web.authentication.logout.LogoutHandler;
-import org.springframework.stereotype.Component;
-import org.springframework.web.client.RestTemplate;
-import org.springframework.web.util.UriComponentsBuilder;
-
-@Slf4j
-@Component
-public class KeycloakLogoutHandler implements LogoutHandler {
-
-
-    private final RestTemplate restTemplate;
-
-    public KeycloakLogoutHandler(RestTemplate restTemplate) {
-        this.restTemplate = restTemplate;
-    }
-
-    @Override
-    public void logout(HttpServletRequest request, HttpServletResponse response, Authentication auth) {
-        logout(request, auth);
-    }
-
-    public void logout(HttpServletRequest request, Authentication auth) {
-        logoutFromKeycloak((OidcUser) auth.getPrincipal());
-    }
-
-    private void logoutFromKeycloak(OidcUser user) {
-        String endSessionEndpoint = user.getIssuer() + "/protocol/openid-connect/logout";
-        UriComponentsBuilder builder = UriComponentsBuilder
-                .fromUriString(endSessionEndpoint)
-                .queryParam("id_token_hint", user.getIdToken().getTokenValue());
-
-        ResponseEntity<String> logoutResponse = restTemplate.getForEntity(builder.toUriString(), String.class);
-        if (logoutResponse.getStatusCode().is2xxSuccessful()) {
-            log.info("Successfulley logged out from Keycloak");
-        } else {
-            log.error("Could not propagate logout to Keycloak");
-        }
-    }
-
-}

backend/src/main/java/de/szut/casino/security/KeycloakSecurityConfig.java

@@ -1,82 +0,0 @@
-package de.szut.casino.security;
-
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.http.HttpMethod;
-import org.springframework.security.config.Customizer;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
-import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
-import org.springframework.security.core.GrantedAuthority;
-import org.springframework.security.core.authority.SimpleGrantedAuthority;
-import org.springframework.security.core.session.SessionRegistry;
-import org.springframework.security.core.session.SessionRegistryImpl;
-import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationConverter;
-import org.springframework.security.web.SecurityFilterChain;
-import org.springframework.security.web.authentication.session.RegisterSessionAuthenticationStrategy;
-import org.springframework.security.web.authentication.session.SessionAuthenticationStrategy;
-import org.springframework.security.web.session.HttpSessionEventPublisher;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-
-@Configuration
-@EnableWebSecurity
-class KeycloakSecurityConfig {
-
-    private final KeycloakLogoutHandler keycloakLogoutHandler;
-
-    KeycloakSecurityConfig(KeycloakLogoutHandler keycloakLogoutHandler) {
-        this.keycloakLogoutHandler = keycloakLogoutHandler;
-    }
-
-    @Bean
-    public SessionRegistry sessionRegistry() {
-        return new SessionRegistryImpl();
-    }
-
-    @Bean
-    protected SessionAuthenticationStrategy sessionAuthenticationStrategy() {
-        return new RegisterSessionAuthenticationStrategy(sessionRegistry());
-    }
-
-    @Bean
-    public HttpSessionEventPublisher httpSessionEventPublisher() {
-        return new HttpSessionEventPublisher();
-    }
-
-
-    @Bean
-    public SecurityFilterChain resourceServerFilterChain(HttpSecurity http) throws Exception {
-        http.csrf(csrf -> csrf
-                        .ignoringRequestMatchers("/webhook")
-                )
-                .authorizeHttpRequests(auth -> auth
-                        .requestMatchers(HttpMethod.POST, "/webhook").permitAll()
-                        .requestMatchers("/swagger", "/swagger-ui/**", "/v3/api-docs/**", "/health").permitAll()
-                        .anyRequest().authenticated()
-                )
-                .oauth2ResourceServer(spec -> spec.jwt(Customizer.withDefaults()));
-
-        return http.build();
-    }
-
-    @Bean
-    public JwtAuthenticationConverter jwtAuthenticationConverter() {
-        JwtAuthenticationConverter jwtAuthenticationConverter = new JwtAuthenticationConverter();
-        jwtAuthenticationConverter.setJwtGrantedAuthoritiesConverter(jwt -> {
-            List<GrantedAuthority> grantedAuthorities = new ArrayList<>();
-
-            Map<String, Object> realmAccess = jwt.getClaim("realm_access");
-            if (realmAccess != null && realmAccess.containsKey("roles")) {
-                List<String> roles = (List<String>) realmAccess.get("roles");
-                for (String role : roles) {
-                    grantedAuthorities.add(new SimpleGrantedAuthority("ROLE_" + role));
-                }
-            }
-
-            return grantedAuthorities;
-        });
-        return jwtAuthenticationConverter;
-    }
-}

backend/src/main/java/de/szut/casino/security/SecurityConfig.java

@@ -0,0 +1,49 @@
+package de.szut.casino.security;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.Customizer;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
+
+import java.util.Arrays;
+import java.util.List;
+
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+    @Bean
+    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
+        http
+            .cors(Customizer.withDefaults())
+            .csrf(csrf -> csrf.disable())
+            .authorizeHttpRequests(auth -> {
+                auth.requestMatchers("/swagger/**", "/swagger-ui/**", "/health").permitAll()
+                    .anyRequest().authenticated();
+                })
+                .oauth2ResourceServer(oauth2 -> oauth2.jwt(jwt ->
+                    jwt.jwtAuthenticationConverter(new CustomJwtAuthenticationConverter())
+                ));
+
+        return http.build();
+    }
+
+    @Bean
+    public CorsConfigurationSource corsConfigurationSource() {
+        CorsConfiguration configuration = new CorsConfiguration();
+        configuration.setAllowedOrigins(List.of("http://localhost:4200"));
+        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"));
+        configuration.setAllowedHeaders(Arrays.asList("authorization", "content-type", "x-auth-token", "Access-Control-Allow-Origin"));
+        configuration.setExposedHeaders(List.of("x-auth-token"));
+        configuration.setAllowCredentials(true);
+        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
+        source.registerCorsConfiguration("/**", configuration);
+        return source;
+    }
+}
+

backend/src/main/java/de/szut/casino/user/UserController.java

@@ -5,7 +5,6 @@ import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestHeader;
@@ -23,20 +22,13 @@ public class UserController {
     @Autowired
     private UserService userService;
 
-    @GetMapping("/user/{id}")
-    public ResponseEntity<?> getUser(@PathVariable String id) {
-        if (id == null || !userService.exists(id)) {
-            return ResponseEntity.notFound().build();
-        }
-        
-        return ResponseEntity.ok(userService.getUser(id));
-    }
-
     @PostMapping("/user")
     public ResponseEntity<?> createUser(@RequestBody @Valid CreateUserDto userData) {
-        if (userService.exists(userData.getKeycloakId())) {
+        if (userService.exists(userData.getAuthentikId())) {
+            HttpHeaders headers = new HttpHeaders();
+            headers.add("Location", "/user");
 
-            return this.redirect("/user/" + userData.getKeycloakId());
+            return new ResponseEntity<>(headers, HttpStatus.FOUND);
         }
 
         return ResponseEntity.ok(userService.createUser(userData));
@@ -44,7 +36,7 @@ public class UserController {
 
     @GetMapping("/user")
     public ResponseEntity<GetUserDto> getCurrentUser(@RequestHeader("Authorization") String token) {
-        GetUserDto userData = userService.getCurrentUser(token);
+        GetUserDto userData = userService.getCurrentUserAsDto(token);
 
         if (userData == null) {
             return ResponseEntity.notFound().build();
@@ -52,11 +44,4 @@ public class UserController {
 
         return ResponseEntity.ok(userData);
     }
-
-    private ResponseEntity<Object> redirect(String route) {
-        HttpHeaders headers = new HttpHeaders();
-        headers.add("Location", route);
-
-        return new ResponseEntity<>(headers, HttpStatus.FOUND);
-    }
 }

backend/src/main/java/de/szut/casino/user/UserEntity.java

@@ -19,14 +19,14 @@ public class UserEntity {
     @GeneratedValue
     private Long id;
     @Column(unique = true)
-    private String keycloakId;
+    private String authentikId;
     private String username;
 
     @Column(precision = 19, scale = 2)
     private BigDecimal balance;
 
-    public UserEntity(String keycloakId, String username, BigDecimal balance) {
-        this.keycloakId = keycloakId;
+    public UserEntity(String authentikId, String username, BigDecimal balance) {
+        this.authentikId = authentikId;
         this.username = username;
         this.balance = balance;
     }

backend/src/main/java/de/szut/casino/user/UserMappingService.java

@@ -9,10 +9,11 @@ import java.math.BigDecimal;
 @Service
 public class UserMappingService {
     public GetUserDto mapToGetUserDto(UserEntity user) {
-        return new GetUserDto(user.getKeycloakId(), user.getUsername(), user.getBalance());
+        return new GetUserDto(user.getAuthentikId(), user.getUsername(), user.getBalance());
     }
 
     public UserEntity mapToUserEntity(CreateUserDto createUserDto) {
-        return new UserEntity(createUserDto.getKeycloakId(), createUserDto.getUsername(), BigDecimal.ZERO);    }
+        return new UserEntity(createUserDto.getAuthentikId(), createUserDto.getUsername(), BigDecimal.ZERO);
+    }
 }
 

backend/src/main/java/de/szut/casino/user/UserRepository.java

@@ -8,8 +8,8 @@ import java.util.Optional;
 
 @Service
 public interface UserRepository extends JpaRepository<UserEntity, Long> {
-    @Query("SELECT u FROM UserEntity u WHERE u.keycloakId = ?1")
-    Optional<UserEntity> findOneByKeycloakId(String keycloakId);
+    @Query("SELECT u FROM UserEntity u WHERE u.authentikId = ?1")
+    Optional<UserEntity> findOneByAuthentikId(String authentikId);
 
-    boolean existsByKeycloakId(String keycloakId);
+    boolean existsByAuthentikId(String authentikId);
 }

backend/src/main/java/de/szut/casino/user/UserService.java

@@ -1,7 +1,8 @@
 package de.szut.casino.user;
 
-import java.util.Optional;
-
+import de.szut.casino.user.dto.CreateUserDto;
+import de.szut.casino.user.dto.GetUserDto;
+import de.szut.casino.user.dto.KeycloakUserDto;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
@@ -10,9 +11,7 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestTemplate;
 
-import de.szut.casino.user.dto.CreateUserDto;
-import de.szut.casino.user.dto.GetUserDto;
-import de.szut.casino.user.dto.KeycloakUserDto;
+import java.util.Optional;
 
 @Service
 public class UserService {
@@ -32,33 +31,51 @@ public class UserService {
         return user;
     }
 
-    public GetUserDto getUser(String keycloakId) {
-        Optional<UserEntity> user = this.userRepository.findOneByKeycloakId(keycloakId);
+    public GetUserDto getUser(String authentikId) {
+        Optional<UserEntity> user = this.userRepository.findOneByAuthentikId(authentikId);
 
         return user.map(userEntity -> mappingService.mapToGetUserDto(userEntity)).orElse(null);
     }
 
-    public GetUserDto getCurrentUser(String token) {
-        KeycloakUserDto userData = getKeycloakUserInfo(token);
+    public GetUserDto getCurrentUserAsDto(String token) {
+        KeycloakUserDto userData = getAuthentikUserInfo(token);
 
         if (userData == null) {
             return null;
         }
-        Optional<UserEntity> user = this.userRepository.findOneByKeycloakId(userData.getSub());
+        Optional<UserEntity> user = this.userRepository.findOneByAuthentikId(userData.getSub());
 
         return user.map(userEntity -> mappingService.mapToGetUserDto(userEntity)).orElse(null);
-
     }
 
-    private KeycloakUserDto getKeycloakUserInfo(String token) {
-        HttpHeaders headers = new HttpHeaders();
-        headers.set("Authorization", token);
-        ResponseEntity<KeycloakUserDto> response = this.http.exchange("http://localhost:9090/realms/LF12/protocol/openid-connect/userinfo", HttpMethod.GET, new HttpEntity<>(headers), KeycloakUserDto.class);
-    
-        return response.getBody();
+    public Optional<UserEntity> getCurrentUser(String token) {
+        KeycloakUserDto userData = getAuthentikUserInfo(token);
+
+        if (userData == null) {
+            return Optional.empty();
+        }
+        return this.userRepository.findOneByAuthentikId(userData.getSub());
     }
 
-    public boolean exists(String keycloakId) {
-        return userRepository.existsByKeycloakId(keycloakId);
+    private KeycloakUserDto getAuthentikUserInfo(String token) {
+        try {
+            HttpHeaders headers = new HttpHeaders();
+            headers.set("Authorization", token);
+            ResponseEntity<KeycloakUserDto> response = this.http.exchange(
+                "https://oauth.simonis.lol/application/o/userinfo/", 
+                HttpMethod.GET, 
+                new HttpEntity<>(headers), 
+                KeycloakUserDto.class
+            );
+            
+            return response.getBody();
+        } catch (Exception e) {
+            System.err.println("Error fetching user info from Authentik: " + e.getMessage());
+            return null;
+        }
+    }
+
+    public boolean exists(String authentikId) {
+        return userRepository.existsByAuthentikId(authentikId);
     }
 }

backend/src/main/java/de/szut/casino/user/dto/CreateUserDto.java

@@ -10,6 +10,6 @@ import lombok.Setter;
 @AllArgsConstructor
 @NoArgsConstructor
 public class CreateUserDto {
-    private String keycloakId;
+    private String authentikId;
     private String username;
 }

backend/src/main/java/de/szut/casino/user/dto/GetUserDto.java

@@ -12,7 +12,7 @@ import java.math.BigDecimal;
 @AllArgsConstructor
 @NoArgsConstructor
 public class GetUserDto {
-    private String keycloakId;
+    private String authentikId;
     private String username;
     private BigDecimal balance;
 }

backend/src/main/resources/application.properties

@@ -9,16 +9,31 @@ app.frontend-host=http://localhost:4200
 
 spring.application.name=lf12_starter
 #client registration configuration
-spring.security.oauth2.client.registration.keycloak.client-id=lf12
-spring.security.oauth2.client.registration.keycloak.authorization-grant-type=authorization_code
-spring.security.oauth2.client.registration.keycloak.scope=openid
+
+spring.security.oauth2.client.registration.authentik.client-id=MDqjm1kcWKuZfqHJXjxwAV20i44aT7m4VhhTL3Nm
+spring.security.oauth2.client.registration.authentik.client-secret=GY2F8te6iAVYt1TNAUVLzWZEXb6JoMNp6chbjqaXNq4gS5xTDL54HqBiAlV1jFKarN28LQ7FUsYX4SbwjfEhZhgeoKuBnZKjR9eiu7RawnGgxIK9ffvUfMkjRxnmiGI5
+spring.security.oauth2.client.registration.authentik.provider=authentik
+spring.security.oauth2.client.registration.authentik.client-name=Authentik
+spring.security.oauth2.client.registration.authentik.scope=openid,email,profile
+spring.security.oauth2.client.registration.authentik.client-authentication-method=client_secret_basic
+spring.security.oauth2.client.registration.authentik.authorization-grant-type=authorization_code
+spring.security.oauth2.client.registration.authentik.redirect-uri={baseUrl}/login/oauth2/code/{registrationId}
+
+# Provider settings
+spring.security.oauth2.client.provider.authentik.issuer-uri=https://oauth.simonis.lol/application/o/casino-dev/
+spring.security.oauth2.client.provider.authentik.authorization-uri=https://oauth.simonis.lol/application/o/authorize/
+spring.security.oauth2.client.provider.authentik.token-uri=https://oauth.simonis.lol/application/o/token/
+spring.security.oauth2.client.provider.authentik.user-info-uri=https://oauth.simonis.lol/application/o/userinfo/
+spring.security.oauth2.client.provider.authentik.jwk-set-uri=https://oauth.simonis.lol/application/o/casino-dev/jwks/
+spring.security.oauth2.client.provider.authentik.user-name-attribute=preferred_username
+
+# Resource server config
+spring.security.oauth2.resourceserver.jwt.issuer-uri=https://oauth.simonis.lol/application/o/casino-dev/
+spring.security.oauth2.resourceserver.jwt.jwk-set-uri=https://oauth.simonis.lol/application/o/casino-dev/jwks/
 
 #OIDC provider configuration:
-spring.security.oauth2.client.provider.keycloak.issuer-uri=http://localhost:9090/realms/LF12
-spring.security.oauth2.client.provider.keycloak.user-name-attribute=preferred_username
 logging.level.org.springframework.security=DEBUG
-#validating JWT token against our Keycloak server
-spring.security.oauth2.resourceserver.jwt.issuer-uri=http://localhost:9090/realms/LF12
+#validating JWT token against our Authentik server
 
 springdoc.swagger-ui.path=swagger
 springdoc.swagger-ui.try-it-out-enabled=true

backend/src/test/java/de/szut/casino/user/UserControllerTest.java

@@ -45,15 +45,15 @@ public class UserControllerTest {
     @BeforeEach
     void setUp() {
         getUserDto = new GetUserDto();
-        getUserDto.setKeycloakId(TEST_ID);
+        getUserDto.setAuthentikId(TEST_ID);
         getUserDto.setUsername("testuser");
 
         testUser = new UserEntity();
-        testUser.setKeycloakId(TEST_ID);
+        testUser.setAuthentikId(TEST_ID);
         testUser.setUsername("testuser");
 
         createUserDto = new CreateUserDto();
-        createUserDto.setKeycloakId(TEST_ID);
+        createUserDto.setAuthentikId(TEST_ID);
         createUserDto.setUsername("testuser");
     }
 
@@ -64,7 +64,7 @@ public class UserControllerTest {
 
         mockMvc.perform(get("/user/" + TEST_ID))
                 .andExpect(status().isOk())
-                .andExpect(jsonPath("$.keycloakId").value(TEST_ID))
+                .andExpect(jsonPath("$.authentikId").value(TEST_ID))
                 .andExpect(jsonPath("$.username").value("testuser"));
     }
 
@@ -85,7 +85,7 @@ public class UserControllerTest {
                         .contentType(MediaType.APPLICATION_JSON)
                         .content(objectMapper.writeValueAsString(createUserDto)))
                 .andExpect(status().isOk())
-                .andExpect(jsonPath("$.keycloakId").value(TEST_ID))
+                .andExpect(jsonPath("$.authentikId").value(TEST_ID))
                 .andExpect(jsonPath("$.username").value("testuser"));
     }
 
@@ -107,7 +107,7 @@ public class UserControllerTest {
         mockMvc.perform(get("/user")
                         .header("Authorization", AUTH_TOKEN))
                 .andExpect(status().isOk())
-                .andExpect(jsonPath("$.keycloakId").value(TEST_ID))
+                .andExpect(jsonPath("$.authentikId").value(TEST_ID))
                 .andExpect(jsonPath("$.username").value("testuser"));
     }
 

frontend/package.json

@@ -9,39 +9,43 @@
     "test": "bunx @angular/cli test",
     "format": "prettier --write \"src/**/*.{ts,html,css,scss}\"",
     "format:check": "prettier --check \"src/**/*.{ts,html,css,scss}\"",
-    "lint": "ng lint"
+    "lint": "bunx @angular/cli lint"
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "^18.2.0",
-    "@angular/cdk": "~18.2.14",
-    "@angular/common": "^18.2.0",
-    "@angular/compiler": "^18.2.0",
-    "@angular/core": "^18.2.0",
-    "@angular/forms": "^18.2.0",
-    "@angular/platform-browser": "^18.2.0",
-    "@angular/platform-browser-dynamic": "^18.2.0",
-    "@angular/router": "^18.2.0",
+    "@angular/animations": "^19.0.0",
+    "@angular/cdk": "~19.2.0",
+    "@angular/common": "^19.0.0",
+    "@angular/compiler": "^19.2.4",
+    "@angular/core": "^19.0.0",
+    "@angular/forms": "^19.0.0",
+    "@angular/platform-browser": "^19.0.0",
+    "@angular/platform-browser-dynamic": "^19.0.0",
+    "@angular/router": "^19.0.0",
     "@fortawesome/angular-fontawesome": "^1.0.0",
     "@fortawesome/fontawesome-svg-core": "^6.7.2",
     "@fortawesome/free-brands-svg-icons": "^6.7.2",
     "@fortawesome/free-solid-svg-icons": "^6.7.2",
-    "@stripe/stripe-js": "^5.6.0",
+    "@stripe/stripe-js": "^7.0.0",
     "@tailwindcss/postcss": "^4.0.3",
+    "ajv": "8.17.1",
+    "ajv-formats": "3.0.1",
+    "countup.js": "^2.8.0",
     "gsap": "^3.12.7",
-    "keycloak-angular": "^16.0.1",
-    "keycloak-js": "^25.0.5",
+    "angular-oauth2-oidc": "^19.0.0",
+    "keycloak-angular": "^19.0.0",
+    "keycloak-js": "^26.0.0",
     "postcss": "^8.5.1",
-    "rxjs": "~7.8.0",
+    "rxjs": "~7.8.2",
     "tailwindcss": "^4.0.3",
     "tslib": "^2.3.0"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^18.2.2",
-    "@angular/cli": "^18.2.2",
-    "@angular/compiler-cli": "^18.2.0",
+    "@angular-devkit/build-angular": "^19.0.0",
+    "@angular/cli": "^19.2.5",
+    "@angular/compiler-cli": "^19.0.0",
     "@types/jasmine": "~5.1.0",
-    "angular-eslint": "19.2.1",
+    "angular-eslint": "19.3.0",
     "eslint": "^9.20.0",
     "jasmine-core": "~5.6.0",
     "karma": "~6.4.0",
@@ -50,7 +54,7 @@
     "karma-jasmine": "~5.1.0",
     "karma-jasmine-html-reporter": "~2.1.0",
     "prettier": "^3.4.2",
-    "typescript": "~5.5.0",
-    "typescript-eslint": "8.26.1"
+    "typescript": "~5.8.0",
+    "typescript-eslint": "8.29.0"
   }
 }

frontend/src/app/app.component.ts

@@ -1,13 +1,12 @@
-import { Component, ChangeDetectionStrategy } from '@angular/core';
+import { ChangeDetectionStrategy, Component } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { RouterOutlet } from '@angular/router';
-import { KeycloakAngularModule } from 'keycloak-angular';
 import { FooterComponent } from './shared/components/footer/footer.component';
 
 @Component({
   selector: 'app-root',
   standalone: true,
-  imports: [CommonModule, RouterOutlet, KeycloakAngularModule, FooterComponent],
+  imports: [CommonModule, RouterOutlet, FooterComponent],
   providers: [],
   templateUrl: './app.component.html',
   styleUrl: './app.component.css',

frontend/src/app/app.config.ts

@@ -1,59 +1,24 @@
-import {
-  APP_INITIALIZER,
-  ApplicationConfig,
-  provideExperimentalZonelessChangeDetection,
-} from '@angular/core';
+import { ApplicationConfig, provideExperimentalZonelessChangeDetection } from '@angular/core';
 import { provideRouter } from '@angular/router';
 import { FontAwesomeModule } from '@fortawesome/angular-fontawesome';
 
 import { routes } from './app.routes';
-import {
-  KeycloakAngularModule,
-  KeycloakBearerInterceptor,
-  KeycloakService,
-} from 'keycloak-angular';
-import { HTTP_INTERCEPTORS, provideHttpClient, withInterceptorsFromDi } from '@angular/common/http';
+import { provideHttpClient, withInterceptors } from '@angular/common/http';
 import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
-
-export const initializeKeycloak = (keycloak: KeycloakService) => async () =>
-  keycloak.init({
-    config: {
-      url: 'http://localhost:9090',
-      realm: 'LF12',
-      clientId: 'lf12',
-    },
-    loadUserProfileAtStartUp: true,
-    initOptions: {
-      onLoad: 'check-sso',
-      silentCheckSsoRedirectUri: window.location.origin + '/silent-check-sso.html',
-      checkLoginIframe: false,
-      redirectUri: window.location.origin + '/',
-    },
-  });
-
-function initializeApp(keycloak: KeycloakService): () => Promise<boolean> {
-  return () => initializeKeycloak(keycloak)();
-}
+import { OAuthStorage, provideOAuthClient } from 'angular-oauth2-oidc';
+import { httpInterceptor } from './shared/interceptor/http.interceptor';
 
 export const appConfig: ApplicationConfig = {
   providers: [
     provideRouter(routes),
-    KeycloakAngularModule,
     FontAwesomeModule,
-    {
-      provide: APP_INITIALIZER,
-      useFactory: initializeApp,
-      multi: true,
-      deps: [KeycloakService],
-    },
-    KeycloakService,
-    provideHttpClient(withInterceptorsFromDi()),
+    provideHttpClient(withInterceptors([httpInterceptor])),
     provideExperimentalZonelessChangeDetection(),
-    {
-      provide: HTTP_INTERCEPTORS,
-      useClass: KeycloakBearerInterceptor,
-      multi: true,
-    },
     provideAnimationsAsync(),
+    provideOAuthClient(),
+    {
+      provide: OAuthStorage,
+      useFactory: () => localStorage,
+    },
   ],
 };

frontend/src/app/app.routes.ts

@@ -8,7 +8,7 @@ export const routes: Routes = [
     component: LandingComponent,
   },
   {
-    path: 'login/success',
+    path: 'auth/callback',
     loadComponent: () => import('./feature/login-success/login-success.component'),
   },
   {

frontend/src/app/auth.guard.ts

@@ -1,12 +1,12 @@
 import { CanActivateFn, Router } from '@angular/router';
 import { inject } from '@angular/core';
-import { KeycloakService } from 'keycloak-angular';
+import { AuthService } from './service/auth.service';
 
 export const authGuard: CanActivateFn = async () => {
-  const keycloakService = inject(KeycloakService);
+  const authService = inject(AuthService);
   const router = inject(Router);
 
-  if (keycloakService.isLoggedIn()) {
+  if (authService.isLoggedIn()) {
     return true;
   }
 

frontend/src/app/feature/deposit/deposit.component.ts

@@ -16,17 +16,17 @@ import {
 } from '@angular/core';
 import { FormControl, FormGroup, ReactiveFormsModule, Validators } from '@angular/forms';
 import { loadStripe, Stripe } from '@stripe/stripe-js';
-import { DepositService } from '../../service/deposit.service';
 import { debounceTime } from 'rxjs';
-import { environment } from '../../../environments/environment';
-import { NgIf } from '@angular/common';
-import { ModalAnimationService } from '../../shared/services/modal-animation.service';
+import { CommonModule } from '@angular/common';
 import gsap from 'gsap';
+import { DepositService } from '@service/deposit.service';
+import { environment } from '@environments/environment';
+import { ModalAnimationService } from '@shared/services/modal-animation.service';
 
 @Component({
   selector: 'app-deposit',
   standalone: true,
-  imports: [ReactiveFormsModule, NgIf],
+  imports: [ReactiveFormsModule, CommonModule],
   templateUrl: './deposit.component.html',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })

frontend/src/app/feature/game/blackjack/blackjack.component.html

@@ -3,21 +3,44 @@
 <div class="container mx-auto px-4 py-6 space-y-8">
   <div class="grid grid-cols-1 lg:grid-cols-4 gap-6">
     <div class="lg:col-span-3 space-y-6 flex flex-col gap-4">
-      <app-dealer-hand [cards]="dealerCards"></app-dealer-hand>
-      <app-player-hand [cards]="playerCards"></app-player-hand>
-      <app-game-controls
-        (hit)="onHit()"
-        (stand)="onStand()"
-        (leave)="leaveGame()"
-      ></app-game-controls>
+      <app-dealer-hand [cards]="dealerCards()"></app-dealer-hand>
+      <app-player-hand [cards]="playerCards()"></app-player-hand>
+
+      @if (gameInProgress()) {
+        <app-game-controls
+          [playerCards]="playerCards()"
+          [gameState]="gameState()"
+          [isActionInProgress]="isActionInProgress()"
+          (hit)="onHit()"
+          (stand)="onStand()"
+          (doubleDown)="onDoubleDown()"
+          (leave)="leaveGame()"
+        ></app-game-controls>
+      }
     </div>
 
     <div class="lg:col-span-1 space-y-6">
       <app-game-info
         [balance]="balance()"
-        [currentBet]="currentBet"
-        (newGame)="onNewGame()"
+        [currentBet]="currentBet()"
+        [gameInProgress]="gameInProgress()"
+        [isActionInProgress]="isActionInProgress()"
+        (newGame)="onNewGame($event)"
       ></app-game-info>
     </div>
   </div>
 </div>
+
+<app-game-result
+  [gameState]="gameState()"
+  [amount]="currentBet()"
+  [balance]="balance()"
+  [show]="showGameResult()"
+  (gameResultClosed)="onCloseGameResult()"
+></app-game-result>
+
+<app-debt-dialog
+  [amount]="debtAmount()"
+  [show]="showDebtDialog()"
+  (dialogClosed)="onCloseDebtDialog()"
+></app-debt-dialog>

frontend/src/app/feature/game/blackjack/blackjack.component.ts

@@ -1,14 +1,20 @@
-import { ChangeDetectionStrategy, Component, inject, signal } from '@angular/core';
+import { ChangeDetectionStrategy, Component, inject, signal, OnInit } from '@angular/core';
 import { CommonModule } from '@angular/common';
-import { NavbarComponent } from '../../../shared/components/navbar/navbar.component';
 import { Router } from '@angular/router';
-import { UserService } from '../../../service/user.service';
 import { PlayingCardComponent } from './components/playing-card/playing-card.component';
 import { DealerHandComponent } from './components/dealer-hand/dealer-hand.component';
 import { PlayerHandComponent } from './components/player-hand/player-hand.component';
 import { GameControlsComponent } from './components/game-controls/game-controls.component';
 import { GameInfoComponent } from './components/game-info/game-info.component';
-import { Card } from './models/card.model';
+import { Card, BlackjackGame } from '@blackjack/models/blackjack.model';
+import { BlackjackService } from '@blackjack/services/blackjack.service';
+import { HttpErrorResponse } from '@angular/common/http';
+import { GameResultComponent } from '@blackjack/components/game-result/game-result.component';
+import { GameState } from '@blackjack/enum/gameState';
+import { NavbarComponent } from '@shared/components/navbar/navbar.component';
+import { UserService } from '@service/user.service';
+import { timer } from 'rxjs';
+import { DebtDialogComponent } from '@shared/components/debt-dialog/debt-dialog.component';
 
 @Component({
   selector: 'app-blackjack',
@@ -21,43 +27,200 @@ import { Card } from './models/card.model';
     PlayerHandComponent,
     GameControlsComponent,
     GameInfoComponent,
+    GameResultComponent,
+    DebtDialogComponent,
   ],
   templateUrl: './blackjack.component.html',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export default class BlackjackComponent {
+export default class BlackjackComponent implements OnInit {
   private router = inject(Router);
   private userService = inject(UserService);
+  private blackjackService = inject(BlackjackService);
 
-  dealerCards: Card[] = [
-    { value: '2', suit: '♥', hidden: false },
-    { value: '3', suit: '♦', hidden: false },
-    { value: 'B', suit: '□', hidden: true },
-  ];
-
-  playerCards: Card[] = [];
-  currentBet = 0;
+  dealerCards = signal<Card[]>([]);
+  playerCards = signal<Card[]>([]);
+  currentBet = signal(0);
   balance = signal(0);
+  currentGameId = signal<number | undefined>(undefined);
+  gameInProgress = signal(false);
+  gameState = signal<GameState>(GameState.IN_PROGRESS);
+  showGameResult = signal(false);
 
-  constructor() {
-    this.userService.getCurrentUser().subscribe((user) => {
-      this.balance.set(user?.balance ?? 0);
+  isActionInProgress = signal(false);
+
+  showDebtDialog = signal(false);
+  debtAmount = signal(0);
+
+  ngOnInit(): void {
+    this.userService.currentUser$.subscribe((user) => {
+      if (user) {
+        this.balance.set(user.balance);
+      }
+    });
+  }
+
+  private updateGameState(game: BlackjackGame) {
+    console.log('Game state update:', game);
+    this.currentGameId.set(game.id);
+    this.currentBet.set(game.bet);
+    this.gameInProgress.set(game.state === GameState.IN_PROGRESS);
+    this.gameState.set(game.state as GameState);
+
+    const isGameOver = game.state !== GameState.IN_PROGRESS;
+
+    this.dealerCards.set(
+      game.dealerCards.map((card, index) => ({
+        ...card,
+        hidden: !isGameOver && index === 1 && game.state === GameState.IN_PROGRESS,
+      }))
+    );
+
+    this.playerCards.set(
+      game.playerCards.map((card) => ({
+        ...card,
+        hidden: false,
+      }))
+    );
+
+    if (isGameOver) {
+      console.log('Game is over, state:', game.state);
+      this.userService.refreshCurrentUser();
+      timer(1500).subscribe(() => {
+        this.showGameResult.set(true);
+        console.log('Game result dialog shown after delay');
+      });
+    }
+  }
+
+  onNewGame(bet: number): void {
+    this.isActionInProgress.set(true);
+
+    this.blackjackService.startGame(bet).subscribe({
+      next: (game) => {
+        this.updateGameState(game);
+        this.userService.refreshCurrentUser();
+        this.isActionInProgress.set(false);
+      },
+      error: (error) => {
+        console.error('Failed to start game:', error);
+        this.isActionInProgress.set(false);
+      },
     });
   }
 
   onHit(): void {
-    // Implementation for hit action
+    if (!this.currentGameId() || this.isActionInProgress()) return;
+
+    this.isActionInProgress.set(true);
+
+    this.blackjackService.hit(this.currentGameId()!).subscribe({
+      next: (game) => {
+        this.updateGameState(game);
+        if (game.state !== 'IN_PROGRESS') {
+          this.userService.refreshCurrentUser();
+        }
+        this.isActionInProgress.set(false);
+      },
+      error: (error) => {
+        console.error('Failed to hit:', error);
+        this.handleGameError(error);
+        this.isActionInProgress.set(false);
+      },
+    });
   }
 
   onStand(): void {
-    // Implementation for stand action
+    if (!this.currentGameId() || this.isActionInProgress()) return;
+
+    if (this.gameState() !== GameState.IN_PROGRESS) {
+      console.log('Cannot stand: game is not in progress');
+      return;
+    }
+
+    this.isActionInProgress.set(true);
+
+    this.blackjackService.stand(this.currentGameId()!).subscribe({
+      next: (game) => {
+        this.updateGameState(game);
+        this.userService.refreshCurrentUser();
+        this.isActionInProgress.set(false);
+      },
+      error: (error) => {
+        console.error('Failed to stand:', error);
+        this.handleGameError(error);
+        this.isActionInProgress.set(false);
+      },
+    });
+  }
+
+  onDoubleDown(): void {
+    if (!this.currentGameId() || this.isActionInProgress()) return;
+
+    if (this.gameState() !== GameState.IN_PROGRESS || this.playerCards().length !== 2) {
+      console.log('Cannot double down: game is not in progress or more than 2 cards');
+      return;
+    }
+
+    this.isActionInProgress.set(true);
+
+    this.blackjackService.doubleDown(this.currentGameId()!).subscribe({
+      next: (game) => {
+        this.updateGameState(game);
+        this.userService.getCurrentUser().subscribe((user) => {
+          if (user && user.balance < 0) {
+            this.debtAmount.set(Math.abs(user.balance));
+            this.showDebtDialog.set(true);
+          }
+        });
+        this.isActionInProgress.set(false);
+      },
+      error: (error) => {
+        console.error('Failed to double down:', error);
+        this.handleGameError(error);
+        this.isActionInProgress.set(false);
+      },
+    });
+  }
+
+  onCloseGameResult(): void {
+    console.log('Closing game result dialog');
+    this.showGameResult.set(false);
+    this.userService.refreshCurrentUser();
+  }
+
+  onCloseDebtDialog(): void {
+    this.showDebtDialog.set(false);
+  }
+
+  private handleGameError(error: HttpErrorResponse): void {
+    if (error instanceof HttpErrorResponse) {
+      if (error.status === 400 && error.error?.error === 'Invalid state') {
+        this.gameInProgress.set(false);
+        this.userService.refreshCurrentUser();
+      } else if (error.status === 500) {
+        console.log('Server error occurred. The game may have been updated in another session.');
+        this.gameInProgress.set(false);
+        this.userService.refreshCurrentUser();
+        if (this.currentGameId()) {
+          this.refreshGameState(this.currentGameId()!);
+        }
+      }
+    }
+  }
+
+  private refreshGameState(gameId: number): void {
+    this.blackjackService.getGame(gameId).subscribe({
+      next: (game) => {
+        this.updateGameState(game);
+      },
+      error: (err) => {
+        console.error('Failed to refresh game state:', err);
+      },
+    });
   }
 
   leaveGame(): void {
     this.router.navigate(['/home']);
   }
-
-  onNewGame(): void {
-    // Implementation for new game
-  }
 }

frontend/src/app/feature/game/blackjack/components/animated-number/animated-number.component.ts

@@ -0,0 +1,83 @@
+import {
+  ChangeDetectionStrategy,
+  Component,
+  Input,
+  OnChanges,
+  SimpleChanges,
+  ElementRef,
+  ViewChild,
+  AfterViewInit,
+} from '@angular/core';
+import { CommonModule, CurrencyPipe } from '@angular/common';
+import { CountUp } from 'countup.js';
+
+@Component({
+  selector: 'app-animated-number',
+  standalone: true,
+  imports: [CommonModule, CurrencyPipe],
+  template: ` <span #numberElement>{{ formattedValue }}</span> `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class AnimatedNumberComponent implements OnChanges, AfterViewInit {
+  @Input() value = 0;
+  @Input() duration = 1;
+  @Input() ease = 'power1.out';
+
+  @ViewChild('numberElement') numberElement!: ElementRef;
+
+  private countUp: CountUp | null = null;
+  private previousValue = 0;
+  formattedValue = '0,00 €';
+
+  ngAfterViewInit(): void {
+    this.initializeCountUp();
+    if (this.countUp && this.value !== 0) {
+      this.countUp.start(() => {
+        this.previousValue = this.value;
+      });
+    }
+  }
+
+  ngOnChanges(changes: SimpleChanges): void {
+    if (changes['value']) {
+      if (this.countUp) {
+        const endVal = this.value;
+
+        this.countUp.update(endVal);
+        this.previousValue = endVal;
+      } else {
+        this.formattedValue = new Intl.NumberFormat('de-DE', {
+          style: 'currency',
+          currency: 'EUR',
+          minimumFractionDigits: 2,
+          maximumFractionDigits: 2,
+        }).format(this.value);
+      }
+    }
+  }
+
+  private initializeCountUp(): void {
+    if (this.numberElement) {
+      this.countUp = new CountUp(this.numberElement.nativeElement, this.value, {
+        startVal: this.previousValue,
+        duration: this.duration,
+        easingFn: (t, b, c, d) => {
+          if (this.ease === 'power1.out') {
+            return c * (1 - Math.pow(1 - t / d, 1)) + b;
+          }
+          return c * (t / d) + b;
+        },
+        formattingFn: (value) => {
+          const formatted = new Intl.NumberFormat('de-DE', {
+            style: 'currency',
+            currency: 'EUR',
+            minimumFractionDigits: 2,
+            maximumFractionDigits: 2,
+          }).format(value);
+          this.formattedValue = formatted;
+          return formatted;
+        },
+      });
+    }
+  }
+}

frontend/src/app/feature/game/blackjack/components/dealer-hand/dealer-hand.component.ts

@@ -1,7 +1,8 @@
-import { ChangeDetectionStrategy, Component, Input } from '@angular/core';
+import { ChangeDetectionStrategy, Component, Input, OnChanges, SimpleChanges } from '@angular/core';
 import { CommonModule } from '@angular/common';
+import { Card } from '@blackjack/models/blackjack.model';
 import { PlayingCardComponent } from '../playing-card/playing-card.component';
-import { Card } from '../../models/card.model';
+import { GameControlsService } from '@blackjack/services/game-controls.service';
 
 @Component({
   selector: 'app-dealer-hand',
@@ -9,21 +10,64 @@ import { Card } from '../../models/card.model';
   imports: [CommonModule, PlayingCardComponent],
   template: `
     <div class="space-y-4">
-      <h3 class="section-heading text-2xl mb-4">Croupier's Karten</h3>
+      <div class="flex justify-between items-center">
+        <h3 class="section-heading text-2xl">Dealer's Karten</h3>
+        <div class="flex items-center gap-2">
+          <div class="text-text-secondary">Punkte:</div>
+          <div class="text-xl font-bold text-accent-red">
+            {{ gameControlsService.calculateHandValue(cards) }}
+          </div>
+        </div>
+      </div>
       <div class="card p-6 !bg-accent-red">
         <div class="flex justify-center gap-4 min-h-[160px] p-4 border-2 border-red-400 rounded-lg">
-          <app-playing-card
-            *ngFor="let card of cards"
-            [value]="card.value"
-            [suit]="card.suit"
-            [hidden]="card.hidden"
-          ></app-playing-card>
+          @if (cards.length > 0) {
+            @for (card of cardsWithState; track card.id) {
+              <app-playing-card
+                [rank]="card.rank"
+                [suit]="card.suit"
+                [hidden]="card.hidden"
+                [isNew]="card.isNew"
+              ></app-playing-card>
+            }
+          } @else {
+            <div class="flex items-center justify-center text-white/70 text-lg font-medium">
+              Warte auf Spielstart...
+            </div>
+          }
         </div>
       </div>
     </div>
   `,
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class DealerHandComponent {
+export class DealerHandComponent implements OnChanges {
   @Input() cards: Card[] = [];
+  cardsWithState: (Card & { isNew: boolean; id: string })[] = [];
+
+  private lastCardCount = 0;
+
+  constructor(protected gameControlsService: GameControlsService) {}
+
+  ngOnChanges(changes: SimpleChanges): void {
+    if (changes['cards']) {
+      this.updateCardsWithState();
+    }
+  }
+
+  private updateCardsWithState(): void {
+    const newCards = this.cards.length > this.lastCardCount;
+
+    this.cardsWithState = this.cards.map((card, index) => {
+      const isNew = newCards && index >= this.lastCardCount;
+
+      return {
+        ...card,
+        isNew,
+        id: `${card.suit}-${card.rank}-${index}`,
+      };
+    });
+
+    this.lastCardCount = this.cards.length;
+  }
 }

frontend/src/app/feature/game/blackjack/components/game-controls/game-controls.component.ts

@@ -1,36 +1,81 @@
-import { ChangeDetectionStrategy, Component, EventEmitter, Output } from '@angular/core';
+import { ChangeDetectionStrategy, Component, EventEmitter, Input, Output } from '@angular/core';
 import { CommonModule } from '@angular/common';
+import { GameState } from '@blackjack/enum/gameState';
+import { Card } from '@blackjack/models/blackjack.model';
+import { GameControlsService } from '@blackjack/services/game-controls.service';
 
 @Component({
   selector: 'app-game-controls',
   standalone: true,
   imports: [CommonModule],
   template: `
-    <div class="flex justify-center gap-4">
-      <button
-        (click)="hit.emit()"
-        class="button-primary px-8 py-4 text-lg font-medium min-w-[120px]"
-      >
-        Ziehen
-      </button>
-      <button
-        (click)="stand.emit()"
-        class="button-primary px-8 py-4 text-lg font-medium min-w-[120px]"
-      >
-        Halten
-      </button>
-      <button
-        (click)="leave.emit()"
-        class="bg-accent-red hover:bg-accent-red/80 px-8 py-4 rounded text-lg font-medium min-w-[120px] transition-all duration-300"
-      >
-        Abbrechen
-      </button>
+    <div class="flex flex-col gap-4">
+      <div class="flex justify-center text-lg mb-5">
+        <div class="card p-4">
+          <div class="text-emerald font-bold mb-1">
+            Deine Punkte: {{ gameControlsService.calculateHandValue(playerCards) }}
+          </div>
+          <div class="text-text-secondary">
+            Status:
+            <span [class]="gameControlsService.getStatusClass(gameState)">{{
+              gameControlsService.getStatusText(gameState)
+            }}</span>
+          </div>
+        </div>
+      </div>
+      <div class="flex justify-center gap-4">
+        <button
+          (click)="hit.emit()"
+          class="button-primary px-8 py-4 text-lg font-medium min-w-[120px] relative"
+          [disabled]="gameState !== GameState.IN_PROGRESS || isActionInProgress"
+        >
+          <span>Ziehen</span>
+        </button>
+        <button
+          (click)="stand.emit()"
+          class="button-primary px-8 py-4 text-lg font-medium min-w-[120px] relative"
+          [disabled]="gameState !== GameState.IN_PROGRESS || isActionInProgress"
+        >
+          <span>Halten</span>
+        </button>
+        <button
+          (click)="doubleDown.emit()"
+          class="button-primary px-8 py-4 text-lg font-medium min-w-[120px] relative"
+          [disabled]="!canDoubleDown || isActionInProgress"
+        >
+          <span>Verdoppeln</span>
+        </button>
+        <button
+          (click)="leave.emit()"
+          class="bg-accent-red hover:bg-accent-red/80 px-8 py-4 rounded text-lg font-medium min-w-[120px] transition-all duration-300"
+          [disabled]="isActionInProgress"
+        >
+          Abbrechen
+        </button>
+      </div>
     </div>
   `,
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class GameControlsComponent {
+  @Input() playerCards: Card[] = [];
+  @Input() gameState: GameState = GameState.IN_PROGRESS;
+  @Input() isActionInProgress = false;
+
   @Output() hit = new EventEmitter<void>();
   @Output() stand = new EventEmitter<void>();
+  @Output() doubleDown = new EventEmitter<void>();
   @Output() leave = new EventEmitter<void>();
+
+  protected readonly GameState = GameState;
+
+  constructor(protected gameControlsService: GameControlsService) {}
+
+  get canDoubleDown(): boolean {
+    return (
+      this.gameState === GameState.IN_PROGRESS &&
+      this.playerCards.length === 2 &&
+      !this.isActionInProgress
+    );
+  }
 }

frontend/src/app/feature/game/blackjack/components/game-info/game-info.component.ts

@@ -1,32 +1,150 @@
-import { ChangeDetectionStrategy, Component, EventEmitter, Input, Output } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  EventEmitter,
+  Input,
+  OnChanges,
+  Output,
+  SimpleChanges,
+  signal,
+} from '@angular/core';
 import { CommonModule, CurrencyPipe } from '@angular/common';
+import { FormGroup, ReactiveFormsModule } from '@angular/forms';
+import { BettingService } from '@blackjack/services/betting.service';
+import { AnimatedNumberComponent } from '../animated-number/animated-number.component';
 
 @Component({
   selector: 'app-game-info',
   standalone: true,
-  imports: [CommonModule, CurrencyPipe],
+  imports: [CommonModule, CurrencyPipe, ReactiveFormsModule, AnimatedNumberComponent],
   template: `
     <div class="card p-4">
       <h3 class="section-heading text-xl mb-4">Spiel Informationen</h3>
       <div class="space-y-4">
-        <div class="flex justify-between items-center">
-          <span class="text-text-secondary">Guthaben:</span>
-          <span class="text-emerald">{{ balance | currency: 'EUR' }}</span>
-        </div>
         <div class="flex justify-between items-center">
           <span class="text-text-secondary">Aktuelle Wette:</span>
           <span [class]="currentBet > 0 ? 'text-accent-red' : 'text-text-secondary'">
-            {{ currentBet | currency: 'EUR' }}
+            <app-animated-number [value]="currentBet" [duration]="0.5"></app-animated-number>
           </span>
         </div>
-        <button class="button-primary w-full py-2" (click)="newGame.emit()">Neues Spiel</button>
+
+        @if (!gameInProgress) {
+          <div class="grid grid-cols-2 gap-2 mb-4">
+            <button
+              (click)="setBetAmount(0.1)"
+              class="button-primary py-2 text-sm"
+              [disabled]="gameInProgress"
+            >
+              10%
+            </button>
+            <button
+              (click)="setBetAmount(0.25)"
+              class="button-primary py-2 text-sm"
+              [disabled]="gameInProgress"
+            >
+              25%
+            </button>
+            <button
+              (click)="setBetAmount(0.5)"
+              class="button-primary py-2 text-sm"
+              [disabled]="gameInProgress"
+            >
+              50%
+            </button>
+            <button
+              (click)="setBetAmount(1)"
+              class="button-primary py-2 text-sm"
+              [disabled]="gameInProgress"
+            >
+              100%
+            </button>
+          </div>
+        }
+
+        <form [formGroup]="betForm" (ngSubmit)="onSubmit()" class="space-y-2">
+          <div class="space-y-1">
+            <label for="bet" class="text-sm text-text-secondary">Einsatz</label>
+            <input
+              type="number"
+              id="bet"
+              formControlName="bet"
+              class="w-full px-3 py-2 bg-deep-blue-light text-white rounded focus:outline-none focus:ring-2 focus:ring-emerald disabled:opacity-50"
+              [min]="1"
+              [max]="balance"
+              step="0.01"
+              [disabled]="gameInProgress || isActionInProgress"
+              [placeholder]="balance | currency: 'EUR'"
+            />
+            @if (betForm.get('bet')?.errors?.['required'] && betForm.get('bet')?.touched) {
+              <span class="text-xs text-accent-red">Bitte geben Sie einen Einsatz ein</span>
+            }
+            @if (betForm.get('bet')?.errors?.['min'] && betForm.get('bet')?.touched) {
+              <span class="text-xs text-accent-red">Mindestens 1€ setzen</span>
+            }
+            @if (betForm.get('bet')?.errors?.['max'] && betForm.get('bet')?.touched) {
+              <span class="text-xs text-accent-red">Nicht genügend Guthaben</span>
+            }
+          </div>
+          <button
+            type="submit"
+            class="button-primary w-full py-2 relative"
+            [disabled]="!betForm.valid || gameInProgress || isActionInProgress"
+          >
+            <span [class.invisible]="isActionInProgress">Neues Spiel</span>
+            @if (isActionInProgress) {
+              <div class="absolute inset-0 flex items-center justify-center">
+                <div
+                  class="w-4 h-4 border-2 border-white border-t-transparent rounded-full animate-spin"
+                ></div>
+              </div>
+            }
+          </button>
+        </form>
       </div>
     </div>
   `,
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class GameInfoComponent {
-  @Input() balance = 0;
+export class GameInfoComponent implements OnChanges {
+  @Input() set balance(value: number) {
+    this._balance.set(value);
+  }
+  get balance() {
+    return this._balance();
+  }
+  private _balance = signal(0);
+
   @Input() currentBet = 0;
-  @Output() newGame = new EventEmitter<void>();
+  @Input() gameInProgress = false;
+  @Input() isActionInProgress = false;
+  @Output() newGame = new EventEmitter<number>();
+
+  betForm: FormGroup;
+
+  constructor(private bettingService: BettingService) {
+    this.betForm = this.bettingService.createBetForm();
+  }
+
+  ngOnChanges(changes: SimpleChanges): void {
+    if (changes['balance']) {
+      this.bettingService.updateBetFormValidators(this.betForm, this.balance);
+    }
+  }
+
+  setBetAmount(percentage: number) {
+    const betAmount = this.bettingService.calculateBetAmount(this.balance, percentage);
+    if (this.bettingService.isValidBet(betAmount, this.balance)) {
+      this.betForm.patchValue({ bet: betAmount });
+    }
+  }
+
+  onSubmit() {
+    if (this.betForm.valid) {
+      const betAmount = parseFloat(this.betForm.value.bet);
+      if (this.bettingService.isValidBet(betAmount, this.balance)) {
+        this.newGame.emit(betAmount);
+        this.betForm.reset();
+      }
+    }
+  }
 }

frontend/src/app/feature/game/blackjack/components/game-result/game-result.component.ts

@@ -0,0 +1,135 @@
+import { ChangeDetectionStrategy, Component, Input, Output, EventEmitter } from '@angular/core';
+import { CommonModule, CurrencyPipe } from '@angular/common';
+import { animate, style, transition, trigger } from '@angular/animations';
+import { GameState } from '../../enum/gameState';
+import { AnimatedNumberComponent } from '../animated-number/animated-number.component';
+
+@Component({
+  selector: 'app-game-result',
+  standalone: true,
+  imports: [CommonModule, CurrencyPipe, AnimatedNumberComponent],
+  template: `
+    <div *ngIf="visible" [@fadeInOut] class="modal-bg" style="z-index: 1000; position: fixed;">
+      <div class="modal-card" [@cardAnimation]>
+        <h2 class="modal-heading" [class]="getResultClass()">{{ getResultTitle() }}</h2>
+        <p class="py-2 text-text-secondary mb-4">{{ getResultMessage() }}</p>
+
+        <div
+          class="bg-deep-blue-light/50 rounded-lg p-5 mb-6 shadow-inner border border-deep-blue-light/30"
+        >
+          <div class="grid grid-cols-2 gap-4">
+            <div class="text-text-secondary">Einsatz:</div>
+            <div class="font-medium text-right">
+              <app-animated-number [value]="amount" [duration]="0.5"></app-animated-number>
+            </div>
+
+            <div class="text-text-secondary">
+              {{ isDraw ? 'Zurückgegeben:' : isWin ? 'Gewonnen:' : 'Verloren:' }}
+            </div>
+            <div
+              class="font-medium text-right"
+              [ngClass]="{
+                'text-emerald': isWin,
+                'text-accent-red': isLoss,
+                'text-yellow-400': isDraw,
+              }"
+            >
+              {{ isLoss ? '-' : '+' }}
+              <app-animated-number
+                [value]="isWin ? amount * 2 : amount"
+                [duration]="0.5"
+              ></app-animated-number>
+              <div *ngIf="isWin" class="text-xs text-text-secondary">
+                (Einsatz
+                <app-animated-number [value]="amount" [duration]="0.5"></app-animated-number> × 2)
+              </div>
+            </div>
+
+            <div class="text-text-secondary border-t border-text-secondary/20 pt-3 font-medium">
+              Kontostand:
+            </div>
+            <div class="font-medium text-right border-t border-text-secondary/20 pt-3">
+              <app-animated-number [value]="balance" [duration]="0.5"></app-animated-number>
+            </div>
+          </div>
+        </div>
+
+        <button type="button" (click)="closeDialog()" class="button-primary w-full py-2">
+          Verstanden
+        </button>
+      </div>
+    </div>
+  `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  animations: [
+    trigger('fadeInOut', [
+      transition(':enter', [
+        style({ opacity: 0 }),
+        animate('150ms ease-out', style({ opacity: 1 })),
+      ]),
+      transition(':leave', [animate('150ms ease-in', style({ opacity: 0 }))]),
+    ]),
+    trigger('cardAnimation', [
+      transition(':enter', [
+        style({ opacity: 0, transform: 'scale(0.95)' }),
+        animate('200ms ease-out', style({ opacity: 1, transform: 'scale(1)' })),
+      ]),
+    ]),
+  ],
+})
+export class GameResultComponent {
+  @Input() gameState: GameState = GameState.IN_PROGRESS;
+  @Input() amount = 0;
+  @Input() balance = 0;
+  @Input() set show(value: boolean) {
+    console.log('GameResultComponent show input changed:', value, 'gameState:', this.gameState);
+    this.visible = value;
+  }
+
+  @Output() gameResultClosed = new EventEmitter<void>();
+
+  visible = false;
+
+  get isWin(): boolean {
+    return this.gameState === GameState.PLAYER_WON || this.gameState === GameState.PLAYER_BLACKJACK;
+  }
+
+  get isLoss(): boolean {
+    return this.gameState === GameState.PLAYER_LOST;
+  }
+
+  get isDraw(): boolean {
+    return this.gameState === GameState.DRAW;
+  }
+
+  getResultTitle(): string {
+    if (this.gameState === GameState.PLAYER_BLACKJACK) return 'Blackjack!';
+    if (this.isWin) return 'Gewonnen!';
+    if (this.isLoss) return 'Verloren!';
+    if (this.isDraw) return 'Unentschieden!';
+    return '';
+  }
+
+  getResultMessage(): string {
+    if (this.gameState === GameState.PLAYER_BLACKJACK)
+      return 'Glückwunsch! Du hast mit einem Blackjack gewonnen!';
+    if (this.isWin) return 'Glückwunsch! Du hast diese Runde gewonnen.';
+    if (this.isLoss) return 'Schade! Du hast diese Runde verloren.';
+    if (this.isDraw) return 'Diese Runde endet unentschieden. Dein Einsatz wurde zurückgegeben.';
+    return '';
+  }
+
+  getResultClass(): string {
+    if (this.gameState === GameState.PLAYER_BLACKJACK) return 'text-emerald font-bold';
+    if (this.isWin) return 'text-emerald';
+    if (this.isLoss) return 'text-accent-red';
+    if (this.isDraw) return 'text-yellow-400';
+    return '';
+  }
+
+  closeDialog(): void {
+    this.visible = false;
+    this.gameResultClosed.emit();
+    console.log('Dialog closed by user');
+  }
+}

frontend/src/app/feature/game/blackjack/components/player-hand/player-hand.component.ts

@@ -1,7 +1,8 @@
-import { ChangeDetectionStrategy, Component, Input } from '@angular/core';
+import { ChangeDetectionStrategy, Component, Input, OnChanges, SimpleChanges } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { PlayingCardComponent } from '../playing-card/playing-card.component';
-import { Card } from '../../models/card.model';
+import { Card } from '@blackjack/models/blackjack.model';
+import { GameControlsService } from '@blackjack/services/game-controls.service';
 
 @Component({
   selector: 'app-player-hand',
@@ -9,23 +10,66 @@ import { Card } from '../../models/card.model';
   imports: [CommonModule, PlayingCardComponent],
   template: `
     <div class="space-y-4">
-      <h3 class="section-heading text-2xl mb-4">Deine Karten</h3>
+      <div class="flex justify-between items-center">
+        <h3 class="section-heading text-2xl">Deine Karten</h3>
+        <div class="flex items-center gap-2">
+          <div class="text-text-secondary">Punkte:</div>
+          <div class="text-xl font-bold text-emerald">
+            {{ gameControlsService.calculateHandValue(cards) }}
+          </div>
+        </div>
+      </div>
       <div class="card p-6 !bg-emerald">
         <div
           class="flex justify-center gap-4 min-h-[160px] p-4 border-2 border-emerald-400 rounded-lg"
         >
-          <app-playing-card
-            *ngFor="let card of cards"
-            [value]="card.value"
-            [suit]="card.suit"
-            [hidden]="card.hidden"
-          ></app-playing-card>
+          @if (cards.length > 0) {
+            @for (card of cardsWithState; track card.id) {
+              <app-playing-card
+                [rank]="card.rank"
+                [suit]="card.suit"
+                [hidden]="card.hidden"
+                [isNew]="card.isNew"
+              ></app-playing-card>
+            }
+          } @else {
+            <div class="flex items-center justify-center text-white/70 text-lg font-medium">
+              Platziere eine Wette um zu spielen...
+            </div>
+          }
         </div>
       </div>
     </div>
   `,
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class PlayerHandComponent {
+export class PlayerHandComponent implements OnChanges {
   @Input() cards: Card[] = [];
+  cardsWithState: (Card & { isNew: boolean; id: string })[] = [];
+
+  private lastCardCount = 0;
+
+  constructor(protected gameControlsService: GameControlsService) {}
+
+  ngOnChanges(changes: SimpleChanges): void {
+    if (changes['cards']) {
+      this.updateCardsWithState();
+    }
+  }
+
+  private updateCardsWithState(): void {
+    const newCards = this.cards.length > this.lastCardCount;
+
+    this.cardsWithState = this.cards.map((card, index) => {
+      const isNew = newCards && index >= this.lastCardCount;
+
+      return {
+        ...card,
+        isNew,
+        id: `${card.suit}-${card.rank}-${index}`,
+      };
+    });
+
+    this.lastCardCount = this.cards.length;
+  }
 }

frontend/src/app/feature/game/blackjack/components/playing-card/playing-card.component.ts

@@ -1,5 +1,15 @@
-import { ChangeDetectionStrategy, Component, Input } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  Input,
+  AfterViewInit,
+  ElementRef,
+  OnChanges,
+  SimpleChanges,
+} from '@angular/core';
 import { CommonModule } from '@angular/common';
+import { gsap } from 'gsap';
+import { Suit, suitSymbols } from '@blackjack/models/blackjack.model';
 
 @Component({
   selector: 'app-playing-card',
@@ -7,24 +17,117 @@ import { CommonModule } from '@angular/common';
   imports: [CommonModule],
   template: `
     <div
-      class="w-24 h-36 rounded-lg p-2 relative flex flex-col justify-between shadow-lg"
+      #cardElement
+      class="w-24 h-36 rounded-lg p-2 relative flex flex-col justify-between shadow-lg card-element"
       [class]="hidden ? 'bg-red-800' : 'bg-white'"
     >
-      <span *ngIf="!hidden" class="text-xl font-bold text-accent-red">{{ value }}</span>
-      <span
-        *ngIf="!hidden"
-        class="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 text-3xl text-accent-red"
-        >{{ suit }}</span
-      >
-      <span *ngIf="!hidden" class="text-xl font-bold text-accent-red self-end rotate-180">{{
-        value
-      }}</span>
+      @if (!hidden) {
+        <span class="text-xl font-bold" [class]="isRedSuit ? 'text-accent-red' : 'text-black'">{{
+          getDisplayRank(rank)
+        }}</span>
+      }
+      @if (!hidden) {
+        <span
+          class="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 text-3xl"
+          [class]="isRedSuit ? 'text-accent-red' : 'text-black'"
+          >{{ getSuitSymbol(suit) }}</span
+        >
+      }
+      @if (!hidden) {
+        <span
+          class="text-xl font-bold self-end rotate-180"
+          [class]="isRedSuit ? 'text-accent-red' : 'text-black'"
+          >{{ getDisplayRank(rank) }}</span
+        >
+      }
     </div>
   `,
+  styles: [
+    `
+      .card-element {
+        transform-style: preserve-3d;
+        backface-visibility: hidden;
+      }
+    `,
+  ],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class PlayingCardComponent {
-  @Input({ required: true }) value!: string;
-  @Input({ required: true }) suit!: string;
+export class PlayingCardComponent implements AfterViewInit, OnChanges {
+  @Input({ required: true }) rank!: string;
+  @Input({ required: true }) suit!: Suit;
   @Input({ required: true }) hidden!: boolean;
+  @Input() isNew = false;
+
+  constructor(private elementRef: ElementRef) {}
+
+  get isRedSuit(): boolean {
+    return this.suit === 'HEARTS' || this.suit === 'DIAMONDS';
+  }
+
+  ngAfterViewInit(): void {
+    if (this.isNew) {
+      this.animateNewCard();
+    }
+  }
+
+  ngOnChanges(changes: SimpleChanges): void {
+    if (changes['hidden'] && !changes['hidden'].firstChange) {
+      this.animateCardFlip();
+    }
+  }
+
+  private animateNewCard(): void {
+    const cardElement = this.elementRef.nativeElement.querySelector('.card-element');
+    gsap.fromTo(
+      cardElement,
+      {
+        y: -100,
+        opacity: 0,
+        rotation: -10,
+        scale: 0.7,
+      },
+      {
+        y: 0,
+        opacity: 1,
+        rotation: 0,
+        scale: 1,
+        duration: 0.5,
+        ease: 'power2.out',
+      }
+    );
+  }
+
+  private animateCardFlip(): void {
+    const cardElement = this.elementRef.nativeElement.querySelector('.card-element');
+    gsap.to(cardElement, {
+      rotationY: 180,
+      duration: 0.3,
+      onComplete: () => {
+        gsap.set(cardElement, { rotationY: 0 });
+      },
+    });
+  }
+
+  protected getSuitSymbol(suit: Suit): string {
+    return suitSymbols[suit];
+  }
+
+  protected getDisplayRank(rank: string): string {
+    const rankMap: Record<string, string> = {
+      TWO: '2',
+      THREE: '3',
+      FOUR: '4',
+      FIVE: '5',
+      SIX: '6',
+      SEVEN: '7',
+      EIGHT: '8',
+      NINE: '9',
+      TEN: '10',
+      JACK: 'J',
+      QUEEN: 'Q',
+      KING: 'K',
+      ACE: 'A',
+    };
+    return rankMap[rank] || rank;
+  }
 }

frontend/src/app/feature/game/blackjack/enum/gameState.ts

@@ -0,0 +1,7 @@
+export enum GameState {
+  PLAYER_WON = 'PLAYER_WON',
+  IN_PROGRESS = 'IN_PROGRESS',
+  PLAYER_LOST = 'PLAYER_LOST',
+  DRAW = 'DRAW',
+  PLAYER_BLACKJACK = 'PLAYER_BLACKJACK',
+}

frontend/src/app/feature/game/blackjack/models/blackjack.model.ts

@@ -0,0 +1,23 @@
+export type Suit = 'HEARTS' | 'DIAMONDS' | 'CLUBS' | 'SPADES';
+
+export interface Card {
+  suit: Suit;
+  rank: string;
+  hidden: boolean;
+}
+
+export interface BlackjackGame {
+  id: number;
+  state: string;
+  bet: number;
+  playerCards: Card[];
+  dealerCards: Card[];
+  userId: number;
+}
+
+export const suitSymbols: Record<Suit, string> = {
+  HEARTS: '♥',
+  DIAMONDS: '♦',
+  CLUBS: '♣',
+  SPADES: '♠',
+};

frontend/src/app/feature/game/blackjack/services/betting.service.ts

@@ -0,0 +1,31 @@
+import { Injectable } from '@angular/core';
+import { FormBuilder, FormGroup, Validators } from '@angular/forms';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class BettingService {
+  constructor(private fb: FormBuilder) {}
+
+  createBetForm(): FormGroup {
+    return this.fb.group({
+      bet: ['', [Validators.required, Validators.min(1)]],
+    });
+  }
+
+  updateBetFormValidators(form: FormGroup, balance: number): void {
+    form.reset();
+    form
+      .get('bet')
+      ?.setValidators([Validators.required, Validators.min(1), Validators.max(balance)]);
+    form.get('bet')?.updateValueAndValidity();
+  }
+
+  calculateBetAmount(balance: number, percentage: number): number {
+    return Math.floor(balance * percentage * 100) / 100;
+  }
+
+  isValidBet(betAmount: number, balance: number): boolean {
+    return betAmount >= 1 && betAmount <= balance;
+  }
+}

frontend/src/app/feature/game/blackjack/services/blackjack.service.ts

@@ -0,0 +1,66 @@
+import { Injectable, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { Observable, catchError } from 'rxjs';
+import { BlackjackGame } from '@blackjack/models/blackjack.model';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class BlackjackService {
+  private http = inject(HttpClient);
+
+  startGame(bet: number): Observable<BlackjackGame> {
+    return this.http
+      .post<BlackjackGame>('/backend/blackjack/start', { betAmount: bet }, { responseType: 'json' })
+      .pipe(
+        catchError((error) => {
+          console.error('Start game error:', error);
+          throw error;
+        })
+      );
+  }
+
+  hit(gameId: number): Observable<BlackjackGame> {
+    return this.http
+      .post<BlackjackGame>(`/backend/blackjack/${gameId}/hit`, {}, { responseType: 'json' })
+      .pipe(
+        catchError((error) => {
+          console.error('Hit error:', error);
+          throw error;
+        })
+      );
+  }
+
+  stand(gameId: number): Observable<BlackjackGame> {
+    return this.http
+      .post<BlackjackGame>(`/backend/blackjack/${gameId}/stand`, {}, { responseType: 'json' })
+      .pipe(
+        catchError((error) => {
+          console.error('Stand error:', error);
+          throw error;
+        })
+      );
+  }
+
+  doubleDown(gameId: number): Observable<BlackjackGame> {
+    return this.http
+      .post<BlackjackGame>(`/backend/blackjack/${gameId}/doubleDown`, {}, { responseType: 'json' })
+      .pipe(
+        catchError((error) => {
+          console.error('Double Down error:', error);
+          throw error;
+        })
+      );
+  }
+
+  getGame(gameId: number): Observable<BlackjackGame> {
+    return this.http
+      .get<BlackjackGame>(`/backend/blackjack/${gameId}`, { responseType: 'json' })
+      .pipe(
+        catchError((error) => {
+          console.error('Get game error:', error);
+          throw error;
+        })
+      );
+  }
+}

frontend/src/app/feature/game/blackjack/services/game-controls.service.ts

@@ -0,0 +1,74 @@
+import { Injectable } from '@angular/core';
+import { Card } from '../models/blackjack.model';
+import { GameState } from '../enum/gameState';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class GameControlsService {
+  calculateHandValue(cards: Card[]): number {
+    let sum = 0;
+    let aceCount = 0;
+
+    const rankValues: Record<string, number> = {
+      TWO: 2,
+      THREE: 3,
+      FOUR: 4,
+      FIVE: 5,
+      SIX: 6,
+      SEVEN: 7,
+      EIGHT: 8,
+      NINE: 9,
+      TEN: 10,
+      JACK: 10,
+      QUEEN: 10,
+      KING: 10,
+      ACE: 11,
+    };
+
+    for (const card of cards) {
+      if (!card.hidden) {
+        const value = rankValues[card.rank] || 0;
+        sum += value;
+        if (card.rank === 'ACE') {
+          aceCount++;
+        }
+      }
+    }
+
+    while (sum > 21 && aceCount > 0) {
+      sum -= 10;
+      aceCount--;
+    }
+
+    return sum;
+  }
+
+  getStatusText(state: GameState): string {
+    switch (state) {
+      case GameState.IN_PROGRESS:
+        return 'Spiel läuft';
+      case GameState.PLAYER_WON:
+        return 'Gewonnen!';
+      case GameState.PLAYER_LOST:
+        return 'Verloren!';
+      case GameState.DRAW:
+        return 'Unentschieden!';
+      default:
+        return state;
+    }
+  }
+
+  getStatusClass(state: GameState): string {
+    switch (state) {
+      case GameState.PLAYER_WON:
+        return 'text-emerald';
+      case GameState.PLAYER_LOST:
+        return 'text-accent-red';
+      case GameState.DRAW:
+        return 'text-yellow-400';
+      default:
+        return 'text-white';
+    }
+  }
+}

frontend/src/app/feature/home/home.component.ts

@@ -1,11 +1,11 @@
 import { ChangeDetectionStrategy, Component, OnInit } from '@angular/core';
-import { NavbarComponent } from '../../shared/components/navbar/navbar.component';
 import { CurrencyPipe, NgFor } from '@angular/common';
-import { Game } from '../../model/Game';
-import { Transaction } from '../../model/Transaction';
 import { DepositComponent } from '../deposit/deposit.component';
-import { ConfirmationComponent } from '../../shared/components/confirmation/confirmation.component';
 import { ActivatedRoute, Router } from '@angular/router';
+import { ConfirmationComponent } from '@shared/components/confirmation/confirmation.component';
+import { Transaction } from 'app/model/Transaction';
+import { NavbarComponent } from '@shared/components/navbar/navbar.component';
+import { Game } from 'app/model/Game';
 
 @Component({
   selector: 'app-homepage',

frontend/src/app/feature/landing/landing.component.ts

@@ -1,6 +1,6 @@
 import { ChangeDetectionStrategy, Component, OnInit, OnDestroy } from '@angular/core';
-import { NavbarComponent } from '../../shared/components/navbar/navbar.component';
 import { NgFor } from '@angular/common';
+import { NavbarComponent } from '@shared/components/navbar/navbar.component';
 
 @Component({
   selector: 'app-landing-page',

frontend/src/app/feature/login-success/login-success.component.ts

@@ -1,7 +1,7 @@
 import { ChangeDetectionStrategy, Component, inject, OnInit } from '@angular/core';
-import { UserService } from '../../service/user.service';
-import { KeycloakService } from 'keycloak-angular';
 import { Router } from '@angular/router';
+import { AuthService } from '../../service/auth.service';
+import { OAuthService } from 'angular-oauth2-oidc';
 
 @Component({
   selector: 'app-login-success',
@@ -12,15 +12,32 @@ import { Router } from '@angular/router';
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export default class LoginSuccessComponent implements OnInit {
-  private userService: UserService = inject(UserService);
-  private keycloakService: KeycloakService = inject(KeycloakService);
+  private authService: AuthService = inject(AuthService);
+  private oauthService: OAuthService = inject(OAuthService);
   private router: Router = inject(Router);
 
   async ngOnInit() {
-    const userProfile = await this.keycloakService.loadUserProfile();
-    const user = await this.userService.getOrCreateUser(userProfile);
-    sessionStorage.setItem('user', JSON.stringify(user));
-
-    this.router.navigate(['home']);
+    try {
+      if (this.oauthService.hasValidAccessToken()) {
+        this.router.navigate(['/home']);
+      } else {
+        setTimeout(() => {
+          if (this.oauthService.hasValidAccessToken() || this.authService.getUser()) {
+            this.router.navigate(['/home']);
+          } else {
+            this.router.navigate(['/']);
+          }
+        }, 3000);
+      }
+    } catch (err) {
+      console.error('Error during login callback:', err);
+      setTimeout(() => {
+        if (this.authService.isLoggedIn()) {
+          this.router.navigate(['/home']);
+        } else {
+          this.router.navigate(['/']);
+        }
+      }, 3000);
+    }
   }
 }

frontend/src/app/model/User.ts

@@ -1,5 +1,5 @@
 export interface User {
-  keycloakId: string;
+  authentikId: string;
   username: string;
   balance: number;
 }

frontend/src/app/service/auth.service.ts

@@ -0,0 +1,208 @@
+import { inject, Injectable } from '@angular/core';
+import { AuthConfig, OAuthEvent, OAuthService } from 'angular-oauth2-oidc';
+import { UserService } from './user.service';
+import { User } from '../model/User';
+import { Router } from '@angular/router';
+import { environment } from '../../environments/environment';
+import { catchError, from, of } from 'rxjs';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class AuthService {
+  private readonly authConfig: AuthConfig = {
+    issuer: 'https://oauth.simonis.lol/application/o/casino-dev/',
+    clientId: environment.OAUTH_CLIENT_ID,
+    dummyClientSecret: environment.OAUTH_CLIENT_SECRET,
+    scope: `openid email profile ${environment.OAUTH_CLIENT_ID}`,
+    responseType: 'code',
+    redirectUri: window.location.origin + '/auth/callback',
+    postLogoutRedirectUri: '',
+    redirectUriAsPostLogoutRedirectUriFallback: false,
+    oidc: true,
+    requestAccessToken: true,
+    tokenEndpoint: 'https://oauth.simonis.lol/application/o/token/',
+    userinfoEndpoint: 'https://oauth.simonis.lol/application/o/userinfo/',
+    strictDiscoveryDocumentValidation: false,
+    skipIssuerCheck: true,
+    disableAtHashCheck: true,
+    requireHttps: false,
+    showDebugInformation: false,
+    sessionChecksEnabled: false,
+  };
+
+  private userService: UserService = inject(UserService);
+  private oauthService: OAuthService = inject(OAuthService);
+  private router: Router = inject(Router);
+
+  private user: User | null = null;
+
+  constructor() {
+    this.oauthService.configure(this.authConfig);
+    this.setupEventHandling();
+
+    const hasAuthParams =
+      window.location.search.includes('code=') ||
+      window.location.search.includes('token=') ||
+      window.location.search.includes('id_token=');
+
+    if (hasAuthParams) {
+      this.processCodeFlow();
+    } else {
+      this.checkExistingSession();
+    }
+  }
+
+  private processCodeFlow() {
+    this.oauthService
+      .tryLogin({
+        onTokenReceived: () => {
+          this.handleSuccessfulLogin();
+        },
+      })
+      .catch((err) => {
+        console.error('Error processing code flow:', err);
+      });
+  }
+
+  private checkExistingSession() {
+    this.oauthService
+      .loadDiscoveryDocumentAndTryLogin()
+      .then((isLoggedIn) => {
+        if (isLoggedIn && !this.user) {
+          this.handleSuccessfulLogin();
+        }
+      })
+      .catch((err) => {
+        console.error('Error during initial login attempt:', err);
+      });
+  }
+
+  private setupEventHandling() {
+    this.oauthService.events.subscribe((event: OAuthEvent) => {
+      if (event.type === 'token_received') {
+        this.handleSuccessfulLogin();
+      }
+    });
+  }
+
+  private handleSuccessfulLogin() {
+    const claims = this.oauthService.getIdentityClaims();
+
+    if (claims && (claims['sub'] || claims['email'])) {
+      this.processUserProfile(claims);
+      return;
+    }
+
+    try {
+      from(this.oauthService.loadUserProfile())
+        .pipe(
+          catchError((error) => {
+            console.error('Error loading user profile:', error);
+            if (this.oauthService.hasValidAccessToken()) {
+              this.oauthService.getAccessToken();
+              const minimalProfile = {
+                sub: 'user-' + Math.random().toString(36).substring(2, 10),
+                preferred_username: 'user' + Date.now(),
+              };
+              return of({ info: minimalProfile });
+            }
+            return of(null);
+          })
+        )
+        .subscribe((profile) => {
+          if (profile) {
+            this.processUserProfile(profile);
+          } else {
+            this.router.navigate(['/']);
+          }
+        });
+    } catch (err) {
+      console.error('Exception in handleSuccessfulLogin:', err);
+      if (this.oauthService.hasValidAccessToken()) {
+        this.router.navigate(['/home']);
+      } else {
+        this.router.navigate(['/']);
+      }
+    }
+  }
+
+  private processUserProfile(profile: unknown) {
+    this.fromUserProfile(profile as Record<string, unknown>).subscribe({
+      next: (user) => {
+        this.user = user;
+        this.router.navigate(['home']);
+      },
+      error: (err) => {
+        console.error('Error creating/retrieving user:', err);
+        if (this.oauthService.hasValidAccessToken()) {
+          this.router.navigate(['/home']);
+        } else {
+          this.router.navigate(['/']);
+        }
+      },
+    });
+  }
+
+  login() {
+    try {
+      this.oauthService
+        .loadDiscoveryDocument()
+        .then(() => {
+          this.oauthService.initLoginFlow();
+        })
+        .catch((err) => {
+          console.error('Error loading discovery document:', err);
+          this.oauthService.initLoginFlow();
+        });
+    } catch (err) {
+      console.error('Exception in login:', err);
+      const redirectUri = this.authConfig.redirectUri || window.location.origin + '/auth/callback';
+      const scope = this.authConfig.scope || 'openid email profile';
+      const authUrl = `${this.authConfig.issuer}authorize?client_id=${this.authConfig.clientId}&redirect_uri=${encodeURIComponent(redirectUri)}&response_type=code&scope=${encodeURIComponent(scope)}`;
+      window.location.href = authUrl;
+    }
+  }
+
+  logout() {
+    try {
+      this.user = null;
+
+      this.oauthService.logOut(true);
+
+      if (window.location.href.includes('id_token') || window.location.href.includes('logout')) {
+        window.location.href = window.location.origin;
+      }
+
+      localStorage.removeItem('access_token');
+      localStorage.removeItem('id_token');
+      localStorage.removeItem('refresh_token');
+      sessionStorage.removeItem('access_token');
+      sessionStorage.removeItem('id_token');
+      sessionStorage.removeItem('refresh_token');
+
+      this.router.navigate(['/']);
+    } catch (err) {
+      console.error('Exception in logout:', err);
+      localStorage.clear();
+      sessionStorage.clear();
+      this.router.navigate(['/']);
+    }
+  }
+
+  isLoggedIn() {
+    return this.oauthService.hasValidAccessToken();
+  }
+
+  private fromUserProfile(profile: Record<string, unknown>) {
+    return this.userService.getOrCreateUser(profile);
+  }
+
+  getAccessToken() {
+    return this.oauthService.getAccessToken();
+  }
+
+  getUser() {
+    return this.user;
+  }
+}

frontend/src/app/service/user.service.ts

@@ -1,7 +1,6 @@
 import { inject, Injectable } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
-import { KeycloakProfile } from 'keycloak-js';
-import { catchError, EMPTY, Observable } from 'rxjs';
+import { BehaviorSubject, catchError, EMPTY, Observable, tap } from 'rxjs';
 import { User } from '../model/User';
 
 @Injectable({
@@ -9,34 +8,53 @@ import { User } from '../model/User';
 })
 export class UserService {
   private http: HttpClient = inject(HttpClient);
+  private currentUserSubject = new BehaviorSubject<User | null>(null);
+  public currentUser$ = this.currentUserSubject.asObservable();
+
+  constructor() {
+    this.getCurrentUser().subscribe();
+  }
 
   public getUser(id: string): Observable<User | null> {
-    return this.http.get<User | null>(`/backend/user/${id}`).pipe(catchError(() => EMPTY));
+    return this.http.get<User | null>(`/backend/user/${id}`).pipe(
+      catchError(() => EMPTY),
+      tap((user) => this.currentUserSubject.next(user))
+    );
   }
 
   public getCurrentUser(): Observable<User | null> {
-    return this.http.get<User | null>('/backend/user').pipe(catchError(() => EMPTY));
+    return this.http.get<User | null>('/backend/user').pipe(
+      catchError(() => EMPTY),
+      tap((user) => this.currentUserSubject.next(user))
+    );
+  }
+
+  public refreshCurrentUser(): void {
+    this.getCurrentUser().subscribe();
   }
 
   public createUser(id: string, username: string): Observable<User> {
-    return this.http.post<User>('/backend/user', {
-      keycloakId: id,
-      username: username,
-    });
+    return this.http
+      .post<User>('/backend/user', {
+        authentikId: id,
+        username: username,
+      })
+      .pipe(tap((user) => this.currentUserSubject.next(user)));
   }
 
-  public async getOrCreateUser(userProfile: KeycloakProfile) {
-    if (userProfile.id == null) {
-      return;
-    }
-    return await this.getUser(userProfile.id)
-      .toPromise()
-      .then(async (user) => {
-        if (user) {
-          return user;
-        }
+  public getOrCreateUser(profile: Record<string, unknown>): Observable<User> {
+    const info = profile['info'] as Record<string, unknown> | undefined;
+    const id = (info?.['sub'] as string) || (profile['sub'] as string);
+    const username =
+      (info?.['preferred_username'] as string) ||
+      (profile['preferred_username'] as string) ||
+      (profile['email'] as string) ||
+      (profile['name'] as string);
 
-        return await this.createUser(userProfile.id ?? '', userProfile.username ?? '').toPromise();
-      });
+    if (!id || !username) {
+      throw new Error('Invalid user profile data');
+    }
+
+    return this.createUser(id, username);
   }
 }

frontend/src/app/shared/components/confirmation/confirmation.component.ts

@@ -8,7 +8,7 @@ import {
   AfterViewInit,
   OnDestroy,
 } from '@angular/core';
-import { ModalAnimationService } from '../../services/modal-animation.service';
+import { ModalAnimationService } from '@shared/services/modal-animation.service';
 import gsap from 'gsap';
 
 @Component({

frontend/src/app/shared/components/debt-dialog/debt-dialog.component.ts

@@ -0,0 +1,176 @@
+import {
+  ChangeDetectionStrategy,
+  Component,
+  EventEmitter,
+  Input,
+  OnDestroy,
+  OnInit,
+  Output,
+  signal,
+} from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { animate, style, transition, trigger } from '@angular/animations';
+import { interval, Subscription, takeWhile } from 'rxjs';
+import { AnimatedNumberComponent } from '@blackjack/components/animated-number/animated-number.component';
+
+@Component({
+  selector: 'app-debt-dialog',
+  standalone: true,
+  imports: [CommonModule, AnimatedNumberComponent],
+  template: `
+    <div *ngIf="visible" [@fadeInOut] class="modal-bg" style="z-index: 1000; position: fixed;">
+      <div class="modal-card" [@cardAnimation]>
+        <h2 class="modal-heading text-accent-red">WARNUNG!</h2>
+        <p class="py-2 text-text-secondary mb-4">
+          Du hast nicht genug Geld für den Double Down. Du bist jetzt im Minus und schuldest uns
+          <app-animated-number [value]="amount" [duration]="0.5"></app-animated-number>.
+        </p>
+        <p class="py-2 text-accent-red mb-4 font-bold">
+          Liefer das Geld sofort an den Dead Drop oder es wird unangenehme Konsequenzen geben!
+        </p>
+        <div
+          class="bg-deep-blue-light/50 rounded-lg p-5 mb-6 shadow-inner border border-deep-blue-light/30"
+        >
+          <div class="grid grid-cols-2 gap-4">
+            <div class="text-text-secondary">Schulden:</div>
+            <div class="font-medium text-right text-accent-red">
+              <app-animated-number [value]="amount" [duration]="0.5"></app-animated-number>
+            </div>
+          </div>
+        </div>
+        <div class="text-center mb-6">
+          <div
+            class="text-8xl font-bold text-accent-red"
+            [class.animate-pulse]="timeLeft() <= 10"
+            [class.animate-bounce]="timeLeft() <= 5"
+            [@countdown]="timeLeft()"
+          >
+            {{ timeLeft() }}
+          </div>
+          <div class="text-text-secondary mt-2">Sekunden verbleibend</div>
+        </div>
+        @if (timeLeft() === 0) {
+          <div class="text-center mb-6">
+            <div class="relative">
+              <div class="absolute inset-0 bg-accent-red/20 blur-xl rounded-full"></div>
+              <div
+                class="relative bg-gradient-to-b from-accent-red to-red-900 p-8 rounded-lg border-2 border-accent-red shadow-lg"
+              >
+                <div class="flex items-center justify-center gap-4 mb-4">
+                  <svg
+                    class="w-12 h-12 text-accent-red animate-[spin_2s_linear_infinite]"
+                    xmlns="http://www.w3.org/2000/svg"
+                    viewBox="0 0 24 24"
+                    fill="currentColor"
+                  >
+                    <path
+                      d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z"
+                    />
+                  </svg>
+                  <span
+                    class="text-4xl font-black tracking-wider text-white animate-[pulse_1s_ease-in-out_infinite]"
+                  >
+                    ZEIT ABGELAUFEN
+                  </span>
+                  <svg
+                    class="w-12 h-12 text-accent-red animate-[spin_2s_linear_infinite]"
+                    xmlns="http://www.w3.org/2000/svg"
+                    viewBox="0 0 24 24"
+                    fill="currentColor"
+                  >
+                    <path
+                      d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z"
+                    />
+                  </svg>
+                </div>
+                <div
+                  class="text-2xl font-bold text-white/90 tracking-wider animate-[pulse_1s_ease-in-out_infinite]"
+                >
+                  KONSEQUENZEN FOLGEN
+                </div>
+              </div>
+            </div>
+          </div>
+        }
+        <button type="button" (click)="closeDialog()" class="button-primary w-full py-2">
+          Verstanden
+        </button>
+      </div>
+    </div>
+  `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  animations: [
+    trigger('fadeInOut', [
+      transition(':enter', [
+        style({ opacity: 0 }),
+        animate('150ms ease-out', style({ opacity: 1 })),
+      ]),
+      transition(':leave', [animate('150ms ease-in', style({ opacity: 0 }))]),
+    ]),
+    trigger('cardAnimation', [
+      transition(':enter', [
+        style({ opacity: 0, transform: 'scale(0.95)' }),
+        animate('200ms ease-out', style({ opacity: 1, transform: 'scale(1)' })),
+      ]),
+    ]),
+    trigger('countdown', [
+      transition('* => *', [
+        style({ transform: 'scale(1.2)' }),
+        animate('100ms ease-out', style({ transform: 'scale(1)' })),
+      ]),
+    ]),
+  ],
+})
+export class DebtDialogComponent implements OnInit, OnDestroy {
+  @Input() amount = 0;
+  @Input() set show(value: boolean) {
+    this.visible = value;
+    if (value) {
+      this.startTimer();
+    }
+  }
+
+  @Output() dialogClosed = new EventEmitter<void>();
+
+  visible = false;
+  timeLeft = signal(30);
+  private timerSubscription: Subscription | undefined;
+  private warningSound = new Audio('assets/sounds/warning.mp3');
+
+  ngOnInit() {
+    if (this.visible) {
+      this.startTimer();
+    }
+  }
+
+  ngOnDestroy() {
+    this.stopTimer();
+  }
+
+  private startTimer() {
+    this.timeLeft.set(30);
+    this.timerSubscription = interval(1000)
+      .pipe(takeWhile(() => this.timeLeft() > 0))
+      .subscribe(() => {
+        this.timeLeft.update((value) => value - 1);
+        if (this.timeLeft() <= 5) {
+          this.warningSound.play();
+        }
+        if (this.timeLeft() === 0) {
+          setTimeout(() => this.closeDialog(), 5000);
+        }
+      });
+  }
+
+  private stopTimer() {
+    if (this.timerSubscription) {
+      this.timerSubscription.unsubscribe();
+    }
+  }
+
+  closeDialog(): void {
+    this.stopTimer();
+    this.visible = false;
+    this.dialogClosed.emit();
+  }
+}

frontend/src/app/shared/components/navbar/navbar.component.html

@@ -17,8 +17,11 @@
         @if (isLoggedIn) {
           <div
             class="text-white font-bold bg-deep-blue-contrast rounded-full px-4 py-2 text-sm hover:bg-deep-blue-contrast/80 hover:cursor-pointer hover:scale-105 transition-all active:scale-95 select-none duration-300"
+            routerLink="/home"
           >
-            <span>Guthaben: {{ balance() | currency: 'EUR' : 'symbol' : '1.2-2' }}</span>
+            <span [class]="balance() < 0 ? 'text-accent-red' : ''">
+              <app-animated-number [value]="balance()" [duration]="0.5"></app-animated-number>
+            </span>
           </div>
           <button (click)="logout()" class="button-primary px-4 py-1.5">Abmelden</button>
         }

frontend/src/app/shared/components/navbar/navbar.component.ts

@@ -1,43 +1,56 @@
-import { ChangeDetectionStrategy, Component, inject, OnInit, signal } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  inject,
+  OnInit,
+  OnDestroy,
+  signal,
+} from '@angular/core';
 import { RouterModule } from '@angular/router';
-import { KeycloakService } from 'keycloak-angular';
-import { UserService } from '../../../service/user.service';
-
+import { AuthService } from '../../../service/auth.service';
 import { CurrencyPipe } from '@angular/common';
+import { UserService } from '@service/user.service';
+import { Subscription } from 'rxjs';
+import { AnimatedNumberComponent } from '@blackjack/components/animated-number/animated-number.component';
+
 @Component({
   selector: 'app-navbar',
   templateUrl: './navbar.component.html',
   standalone: true,
-  imports: [RouterModule, CurrencyPipe],
+  imports: [RouterModule, CurrencyPipe, AnimatedNumberComponent],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class NavbarComponent implements OnInit {
+export class NavbarComponent implements OnInit, OnDestroy {
   isMenuOpen = false;
-  private keycloakService: KeycloakService = inject(KeycloakService);
-  isLoggedIn = this.keycloakService.isLoggedIn();
+  private authService: AuthService = inject(AuthService);
+  isLoggedIn = this.authService.isLoggedIn();
 
   private userService = inject(UserService);
-  private user = this.userService.getCurrentUser();
-
+  private userSubscription: Subscription | undefined;
   public balance = signal(0);
 
   ngOnInit() {
-    this.user.subscribe((user) => {
+    this.userSubscription = this.userService.currentUser$.subscribe((user) => {
       this.balance.set(user?.balance ?? 0);
     });
   }
 
+  ngOnDestroy() {
+    if (this.userSubscription) {
+      this.userSubscription.unsubscribe();
+    }
+  }
+
   login() {
     try {
-      const baseUrl = window.location.origin;
-      this.keycloakService.login({ redirectUri: `${baseUrl}/login/success` });
+      this.authService.login();
     } catch (error) {
       console.error('Login failed:', error);
     }
   }
 
   logout() {
-    this.keycloakService.logout();
+    this.authService.logout();
   }
 
   toggleMenu() {

frontend/src/app/shared/interceptor/http.interceptor.ts

@@ -0,0 +1,21 @@
+import { HttpInterceptorFn } from '@angular/common/http';
+import { inject } from '@angular/core';
+import { OAuthStorage } from 'angular-oauth2-oidc';
+
+export const httpInterceptor: HttpInterceptorFn = (req, next) => {
+  const oauthStorage = inject(OAuthStorage);
+
+  if (oauthStorage.getItem('access_token')) {
+    return next(
+      req.clone({
+        setHeaders: {
+          Authorization: 'Bearer ' + oauthStorage.getItem('access_token'),
+          'Access-Control-Allow-Origin': '*',
+          'Referrer-Policy': 'no-referrer',
+        },
+      })
+    );
+  } else {
+    return next(req);
+  }
+};

frontend/src/environments/environment.ts

@@ -1,4 +1,7 @@
 export const environment = {
   STRIPE_KEY:
     'pk_test_51QrePYIvCfqz7ANgMizBorPpVjJ8S6gcaL4yvcMQnVaKyReqcQ6jqaQEF7aDZbDu8rNVsTZrw8ABek4ToxQX7KZe00jpGh8naG',
+  OAUTH_CLIENT_ID: 'MDqjm1kcWKuZfqHJXjxwAV20i44aT7m4VhhTL3Nm',
+  OAUTH_CLIENT_SECRET:
+    'GY2F8te6iAVYt1TNAUVLzWZEXb6JoMNp6chbjqaXNq4gS5xTDL54HqBiAlV1jFKarN28LQ7FUsYX4SbwjfEhZhgeoKuBnZKjR9eiu7RawnGgxIK9ffvUfMkjRxnmiGI5',
 };

frontend/tsconfig.json

@@ -3,6 +3,13 @@
 {
   "compileOnSave": false,
   "compilerOptions": {
+    "baseUrl": "./src",
+    "paths": {
+      "@service/*": ["app/service/*"],
+      "@environments/*": ["environments/*"],
+      "@shared/*": ["app/shared/*"],
+      "@blackjack/*": ["app/feature/game/blackjack/*"]
+    },
     "outDir": "./dist/out-tsc",
     "strict": true,
     "noImplicitOverride": true,