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package com.rods.backtestingstrategies.security;

import lombok.RequiredArgsConstructor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.config.Customizer;
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;

@Configuration
@EnableWebSecurity
@RequiredArgsConstructor
public class SecurityConfig {

    private final JwtAuthenticationFilter jwtAuthFilter;
    private final UserDetailsService userDetailsService;

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
                .csrf(AbstractHttpConfigurer::disable)
                .cors(Customizer.withDefaults())
                .authorizeHttpRequests(auth -> auth
                        .requestMatchers(org.springframework.http.HttpMethod.OPTIONS, "/**").permitAll() // Allow preflight checks
                        .requestMatchers("/api/auth/**", "/server/**", "/error").permitAll() // Whitelist public endpoints
                        .anyRequest().authenticated() // Secure everything else
                )
                .sessionManagement(sess -> sess
                        .sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                .authenticationProvider(authenticationProvider())
                .addFilterBefore(jwtAuthFilter, UsernamePasswordAuthenticationFilter.class);

        return http.build();
    }

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

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

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

    @Bean
    public org.springframework.web.cors.CorsConfigurationSource corsConfigurationSource() {
        org.springframework.web.cors.CorsConfiguration configuration = new org.springframework.web.cors.CorsConfiguration();
        configuration.setAllowedOrigins(java.util.Arrays.asList("http://localhost:5173", "http://localhost:3000", "https://backtest-livid.vercel.app"));
        configuration
                .setAllowedMethods(java.util.Arrays.asList("GET", "POST", "PUT", "DELETE", "OPTIONS", "HEAD", "PATCH"));
        configuration.setAllowedHeaders(java.util.Collections.singletonList("*"));
        configuration.setAllowCredentials(true);
        org.springframework.web.cors.UrlBasedCorsConfigurationSource source = new org.springframework.web.cors.UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }
}