package de.szut.casino.security;

import de.szut.casino.security.jwt.JwtAuthenticationFilter;
import de.szut.casino.security.oauth2.CustomOAuth2UserService;
import de.szut.casino.security.oauth2.OAuth2AuthenticationSuccessHandler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
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
@EnableMethodSecurity
public class SecurityConfig {

    @Value("${app.frontend-host}")
    private String frontendHost;
    
    @Value("${app.oauth2.authorizedRedirectUris}")
    private String authorizedRedirectUri;

    @Autowired
    private UserDetailsService userDetailsService;

    @Autowired
    private JwtAuthenticationFilter jwtAuthenticationFilter;
    

    @Bean
    public DaoAuthenticationProvider authenticationProvider() {
        DaoAuthenticationProvider authProvider = new DaoAuthenticationProvider();
        
        authProvider.setUserDetailsService(userDetailsService);
        authProvider.setPasswordEncoder(passwordEncoder());
        
        return authProvider;
    }

    @Bean
    public AuthenticationManager authenticationManager(AuthenticationConfiguration authConfig) throws Exception {
        return authConfig.getAuthenticationManager();
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .cors(cors -> cors.configurationSource(corsConfigurationSource()))
            .csrf(csrf -> csrf.disable())
            .sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
            .authorizeHttpRequests(auth -> {
                auth.requestMatchers("/auth/**", "/webhook", "/swagger/**", "/swagger-ui/**", "/health", "/error", "/oauth2/**").permitAll()
                    .requestMatchers(org.springframework.http.HttpMethod.OPTIONS, "/**").permitAll()
                    .anyRequest().authenticated();
                })
            // Disable Spring's built-in OAuth2 login since we're implementing a custom flow
            // We're using our own GitHubController for OAuth2 login
            .authenticationProvider(authenticationProvider())
            .addFilterBefore(jwtAuthenticationFilter, UsernamePasswordAuthenticationFilter.class);

        return http.build();
    }

    @Bean
    public CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(List.of(this.frontendHost));
        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"));
        configuration.setAllowedHeaders(Arrays.asList("Authorization", "Content-Type", "Accept", "Origin", "X-Requested-With", "Access-Control-Request-Method", "Access-Control-Request-Headers", "x-auth-token"));
        configuration.setExposedHeaders(Arrays.asList("Authorization", "Content-Type", "x-auth-token", "Access-Control-Allow-Origin", "Access-Control-Allow-Methods", "Access-Control-Allow-Headers"));
        configuration.setAllowCredentials(true);
        configuration.setMaxAge(3600L);
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }
}