package ite.security.service;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.Customizer;
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.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.config.http.SessionCreationPolicy;
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;
import java.util.Collections;


@Configuration	
@EnableWebSecurity
@EnableMethodSecurity
public class SecurityConfig {


    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {

        //http.securityMatcher("/api/ping").anonymous(Customizer.withDefaults());
        http.authorizeHttpRequests(authorize -> authorize
                        .requestMatchers("/api/ping").anonymous()
                // Authorization using matchers
                //.requestMatchers("/api/*").hasAuthority("ROLE_USER")
                //.requestMatchers("/api/*").hasRole("ROLE_ADMIN")
                .anyRequest().authenticated()
                // TODO 3: Set custom JWT converter which maps grants from access token

        );
        http.sessionManagement(config -> {
            config.sessionCreationPolicy(SessionCreationPolicy.STATELESS);
        });

        http.csrf(AbstractHttpConfigurer::disable)
            .cors(Customizer.withDefaults());

        return http.build();
    }

       // Cross-origin resource sharing (CORS) is a mechanism to safely bypass
       // the same-origin policy. If Resource server sits on different domain from
       // client application domain, you can configure CORS policy.
       //    Browser denies by default: portal.domain-a.com  -> service.domain-b.com
       //    You need to control same origin policy by CORS config. CORS is controlled
       //    bt HTTP headers: -> Origin, <- Access-Control-Allow-Origin
       // https://docs.spring.io/spring-security/reference/reactive/integrations/cors.html
    @Bean
    CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(Arrays.asList("https://localhost:8080", "http://localhost:8080"));
        configuration.setAllowedMethods(Arrays.asList("GET", "POST"));
        configuration.setAllowedHeaders(Collections.singletonList(CorsConfiguration.ALL));
        configuration.setAllowCredentials(true);
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }

    
}