package com.bruce.sams.common.config;

import com.bruce.sams.common.filter.JwtAuthFilter;
import com.bruce.sams.service.impl.CustomUserDetailsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.ProviderManager;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

import java.util.Collections;

@Configuration
@EnableMethodSecurity // 开启 @PreAuthorize 支持
public class SecurityConfig {

    @Autowired
    private JwtAuthFilter jwtAuthFilter;

    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        return http
                .csrf(csrf -> csrf.disable())
                .sessionManagement(sess -> sess.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                .authorizeHttpRequests(auth -> auth
                        .requestMatchers("/login").permitAll()
                        .requestMatchers("/api/auth/me").hasAnyRole("COLLEGE_ADMIN")
                        .requestMatchers("/api/user/**").authenticated()
                        .anyRequest().authenticated()
                )
                .addFilterBefore(jwtAuthFilter, UsernamePasswordAuthenticationFilter.class)
                .build();
    }

    @Bean
    public AuthenticationManager authenticationManager(CustomUserDetailsService userDetailsService) {
        DaoAuthenticationProvider provider = new DaoAuthenticationProvider();
        provider.setUserDetailsService(userDetailsService);
        provider.setPasswordEncoder(new BCryptPasswordEncoder());
        return new ProviderManager(Collections.singletonList(provider));
    }
}