package com.emotion.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
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;

/**
 * 安全配置
 * 
 * @author huazhongmin
 * @date 2025-07-22
 */
@Configuration
@EnableWebSecurity
public class SecurityConfig {

    /**
     * 密码编码器
     */
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    /**
     * 安全过滤器链
     */
    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        http
                // 禁用CSRF
                .csrf(csrf -> csrf.disable())

                // 配置CORS
                .cors(cors -> cors.configurationSource(corsConfigurationSource()))

                // 配置会话管理
                .sessionManagement(management -> management
                        .sessionCreationPolicy(SessionCreationPolicy.STATELESS))

                // 配置授权规则
                .authorizeHttpRequests(authz -> authz
                        // 允许所有请求（简化配置）
                        .anyRequest().permitAll())

                // 禁用默认登录页面
                .formLogin(login -> login.disable())

                // 禁用HTTP Basic认证
                .httpBasic(basic -> basic.disable());

        return http.build();
    }

    /**
     * CORS配置
     */
    @Bean
    public CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();

        // 允许所有来源
        configuration.setAllowedOriginPatterns(Arrays.asList("*"));

        // 允许的HTTP方法
        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "DELETE", "OPTIONS", "PATCH"));

        // 允许的请求头
        configuration.setAllowedHeaders(Arrays.asList("*"));

        // 允许携带凭证
        configuration.setAllowCredentials(true);

        // 预检请求的缓存时间
        configuration.setMaxAge(3600L);

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);

        return source;
    }
}