frontend/src/app/feature/lootboxes/lootbox-opening/lootbox-opening.component.css

@@ -312,9 +312,11 @@ body {
     opacity 0.5s ease-out,
     transform 0.5s ease-out;
   transition-delay: 0.5s;
+  pointer-events: none; /* Prevent clicks when invisible */
 }
 
 .animation-fade.visible {
   opacity: 1;
   transform: translateY(0);
+  pointer-events: auto; /* Enable clicks when visible */
 }

frontend/src/app/feature/lootboxes/lootbox-opening/lootbox-opening.component.html

@@ -31,9 +31,15 @@
           <div *ngIf="!isOpening && !isOpen" class="mb-6">
             <button
               (click)="openLootbox()"
-              class="button-primary w-full py-3 text-lg font-semibold rounded"
+              [disabled]="!hasEnoughBalance()"
+              [ngClass]="{
+                'button-primary': hasEnoughBalance(),
+                'bg-gray-500 cursor-not-allowed': !hasEnoughBalance(),
+              }"
+              class="w-full py-3 text-lg font-semibold rounded"
             >
-              Öffnen
+              <span *ngIf="hasEnoughBalance()">Öffnen</span>
+              <span *ngIf="!hasEnoughBalance()">Nicht genug Guthaben</span>
             </button>
           </div>
 
@@ -85,12 +91,24 @@
               class="flex justify-center gap-4 mt-8 animation-fade"
               [class.visible]="animationCompleted"
             >
-              <button (click)="openAgain()" class="button-primary px-6 py-2 font-semibold rounded">
-                Nochmal Öffnen
+              <button
+                (click)="openAgain()"
+                [disabled]="!animationCompleted || !hasEnoughBalance()"
+                [ngClass]="{
+                  'button-primary': hasEnoughBalance(),
+                  'bg-gray-500 cursor-not-allowed': !hasEnoughBalance(),
+                }"
+                class="px-6 py-2 font-semibold rounded"
+                [attr.aria-hidden]="!animationCompleted"
+              >
+                <span *ngIf="hasEnoughBalance()">Nochmal Öffnen</span>
+                <span *ngIf="!hasEnoughBalance()">Nicht genug Guthaben</span>
               </button>
               <button
                 (click)="goBack()"
                 class="bg-deep-blue hover:bg-deep-blue-contrast text-white px-6 py-2 rounded font-semibold transition"
+                [disabled]="!animationCompleted"
+                [attr.aria-hidden]="!animationCompleted"
               >
                 Zurück zur Übersicht
               </button>

frontend/src/app/feature/lootboxes/lootbox-opening/lootbox-opening.component.ts

@@ -4,6 +4,8 @@ import { ActivatedRoute, Router } from '@angular/router';
 import { LootboxService } from '../services/lootbox.service';
 import { LootBox, Reward } from 'app/model/LootBox';
 import { NavbarComponent } from '@shared/components/navbar/navbar.component';
+import { UserService } from '@service/user.service';
+import { User } from 'app/model/User';
 
 @Component({
   selector: 'app-lootbox-opening',
@@ -21,14 +23,20 @@ export default class LootboxOpeningComponent {
   wonReward: Reward | null = null;
   prizeList: Reward[] = [];
   animationCompleted = false;
+  currentUser: User | null = null;
 
   constructor(
     private route: ActivatedRoute,
     private router: Router,
     private lootboxService: LootboxService,
+    private userService: UserService,
     private cdr: ChangeDetectorRef
   ) {
     this.loadLootbox();
+    this.userService.currentUser$.subscribe((user) => {
+      this.currentUser = user;
+      this.cdr.detectChanges();
+    });
   }
 
   private loadLootbox(): void {
@@ -57,8 +65,24 @@ export default class LootboxOpeningComponent {
   openLootbox(): void {
     if (!this.lootbox || this.isOpening) return;
 
+    // Check if user has enough balance
+    if (!this.hasEnoughBalance()) {
+      this.error = 'Nicht genug Guthaben, um diese Lootbox zu öffnen.';
+      window.scrollTo(0, 0);
+      this.cdr.detectChanges();
+      setTimeout(() => {
+        this.error = '';
+        this.cdr.detectChanges();
+      }, 5000);
+      return;
+    }
+
     this.resetState(true);
 
+    if (this.lootbox.price) {
+      this.userService.updateLocalBalance(-this.lootbox.price);
+    }
+
     setTimeout(() => {
       this.lootboxService.purchaseLootBox(this.lootbox!.id).subscribe({
         next: this.handleRewardSuccess.bind(this),
@@ -72,6 +96,7 @@ export default class LootboxOpeningComponent {
     this.generateCasePrizes(reward);
     this.isOpening = false;
     this.isOpen = true;
+
     this.cdr.detectChanges();
   }
 
@@ -80,7 +105,12 @@ export default class LootboxOpeningComponent {
 
     const rewards = this.lootbox.rewards;
     const fallback = rewards[Math.floor(Math.random() * rewards.length)];
-    this.handleRewardSuccess(fallback);
+
+    this.wonReward = fallback;
+    this.generateCasePrizes(fallback);
+    this.isOpening = false;
+    this.isOpen = true;
+    this.cdr.detectChanges();
   }
 
   private resetState(isOpening = false): void {
@@ -112,6 +142,12 @@ export default class LootboxOpeningComponent {
 
     setTimeout(() => {
       this.animationCompleted = true;
+
+      if (this.wonReward) {
+        this.userService.updateLocalBalance(this.wonReward.value);
+      }
+
+      this.userService.refreshCurrentUser();
       this.cdr.detectChanges();
     }, 10000);
   }
@@ -168,4 +204,9 @@ export default class LootboxOpeningComponent {
     if (!this.wonReward || !this.lootbox) return '';
     return this.wonReward.value > (this.lootbox.price || 0) ? 'text-emerald' : 'text-accent-red';
   }
+
+  hasEnoughBalance(): boolean {
+    if (!this.currentUser || !this.lootbox) return false;
+    return this.currentUser.balance >= this.lootbox.price;
+  }
 }

frontend/src/app/feature/lootboxes/lootbox-selection/lootbox-selection.component.html

@@ -44,9 +44,15 @@
         <div class="mt-4">
           <button
             (click)="openLootbox(lootbox.id)"
-            class="button-primary w-full py-2 rounded font-semibold"
+            [disabled]="!hasEnoughBalance(lootbox.price)"
+            [ngClass]="{
+              'button-primary': hasEnoughBalance(lootbox.price),
+              'bg-gray-500 cursor-not-allowed': !hasEnoughBalance(lootbox.price),
+            }"
+            class="w-full py-2 rounded font-semibold"
           >
-            Öffnen
+            <span *ngIf="hasEnoughBalance(lootbox.price)">Öffnen</span>
+            <span *ngIf="!hasEnoughBalance(lootbox.price)">Nicht genug Guthaben</span>
           </button>
         </div>
       </div>

frontend/src/app/feature/lootboxes/lootbox-selection/lootbox-selection.component.ts

@@ -5,6 +5,8 @@ import { LootboxService } from '../services/lootbox.service';
 import { LootBox } from 'app/model/LootBox';
 import { Router } from '@angular/router';
 import { timeout } from 'rxjs';
+import { UserService } from '@service/user.service';
+import { User } from 'app/model/User';
 
 @Component({
   selector: 'app-lootbox-selection',
@@ -17,6 +19,7 @@ export default class LootboxSelectionComponent implements OnInit {
   lootboxes: LootBox[] = [];
   isLoading = true;
   error = '';
+  currentUser: User | null = null;
 
   // Fallback data in case the API call fails
   fallbackLootboxes: LootBox[] = [
@@ -86,11 +89,16 @@ export default class LootboxSelectionComponent implements OnInit {
   constructor(
     private lootboxService: LootboxService,
     private router: Router,
-    private cdr: ChangeDetectorRef
+    private cdr: ChangeDetectorRef,
+    private userService: UserService
   ) {}
 
   ngOnInit(): void {
     this.loadLootboxes();
+    this.userService.currentUser$.subscribe((user) => {
+      this.currentUser = user;
+      this.cdr.detectChanges();
+    });
   }
 
   loadLootboxes(): void {
@@ -120,6 +128,24 @@ export default class LootboxSelectionComponent implements OnInit {
   }
 
   openLootbox(lootboxId: number): void {
+    const lootbox = this.lootboxes.find((box) => box.id === lootboxId);
+
+    if (!lootbox) {
+      return;
+    }
+
+    if (!this.currentUser || this.currentUser.balance < lootbox.price) {
+      this.error = 'Nicht genug Guthaben, um diese Lootbox zu öffnen.';
+      // Scroll to top to see the error message
+      window.scrollTo(0, 0);
+      this.cdr.detectChanges();
+      setTimeout(() => {
+        this.error = '';
+        this.cdr.detectChanges();
+      }, 5000);
+      return;
+    }
+
     this.router.navigate(['/game/lootboxes/open', lootboxId]);
   }
 
@@ -136,4 +162,8 @@ export default class LootboxSelectionComponent implements OnInit {
   formatProbability(probability: number): string {
     return (probability * 100).toFixed(0) + '%';
   }
+
+  hasEnoughBalance(price: number): boolean {
+    return !!this.currentUser && this.currentUser.balance >= price;
+  }
 }

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

@@ -33,6 +33,17 @@ export class UserService {
     this.getCurrentUser().subscribe();
   }
 
+  public updateLocalBalance(amount: number): void {
+    const currentUser = this.currentUserSubject.getValue();
+    if (currentUser) {
+      const updatedUser = {
+        ...currentUser,
+        balance: currentUser.balance + amount,
+      };
+      this.currentUserSubject.next(updatedUser);
+    }
+  }
+
   public createUser(id: string, username: string): Observable<User> {
     return this.http
       .post<User>('/backend/user', {

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

@@ -31,7 +31,10 @@ export class NavbarComponent implements OnInit, OnDestroy {
   ngOnInit() {
     this.userSubscription = this.userService.currentUser$.subscribe((user) => {
       this.balance.set(user?.balance ?? 0);
+      console.log('Updated navbar balance:', user?.balance);
     });
+
+    this.userService.refreshCurrentUser();
   }
 
   ngOnDestroy() {