package com.recipeapp.auth;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
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.HttpStatusEntryPoint;

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
                // CSRF is disabled: SvelteKit is the only client and submits form actions
                // server-side, so the browser never calls the backend directly.
                .csrf(csrf -> csrf.disable())
                .authorizeHttpRequests(auth -> auth
                        .requestMatchers("/v1/auth/signup", "/v1/auth/login").permitAll()
                        .requestMatchers("/swagger-ui/**", "/v3/api-docs/**").permitAll()
                        .requestMatchers("/v1/admin/**").hasAuthority("ROLE_ADMIN")
                        .anyRequest().authenticated())
                .exceptionHandling(ex -> ex
                        .authenticationEntryPoint(new HttpStatusEntryPoint(HttpStatus.UNAUTHORIZED)))
                .sessionManagement(session -> session
                        .maximumSessions(1));

        return http.build();
    }

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