package com.dh7789dev.xpeditis.configuration;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
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.method.configuration.EnableMethodSecurity;
import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.config.annotation.web.configurers.HeadersConfigurer;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.factory.PasswordEncoderFactories;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.access.expression.WebExpressionAuthorizationManager;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutHandler;

import static org.springframework.security.config.http.SessionCreationPolicy.STATELESS;
import static org.springframework.security.web.util.matcher.AntPathRequestMatcher.antMatcher;

@Configuration
@EnableWebSecurity
@EnableMethodSecurity(prePostEnabled = true)
public class SecurityConfiguration {

    @Value("${application.csrf.enabled}")
    boolean csrfEnabled;

    private static final String ADMIN_ROLE = "ADMIN";
    private static final String ADMIN_PLATFORM_ROLE = "ADMIN_PLATFORM";

    private static final String API_V1_URI = "/api/v1/**";

    private static final String[] WHITE_LIST_URL = {
            "/api/v1/auth/**",
            "/api/v1/devis/**",
            "/api/v1/grilles-tarifaires/**",
            "/actuator/health/**"};

    private static final String[] ADMIN_ONLY_URL = {
            "/api/v1/users"};

    private static final String[] GENERAL_API_URL = {
            "/api/v1/quotes/**",
            "/api/v1/shipments/**",
            "/api/v1/companies/profile"};

    private static final String[] INTERNAL_WHITE_LIST_URL = {
            "/v2/api-docs",
            "/v3/api-docs",
            "/v3/api-docs/**",
            "/swagger-resources",
            "/swagger-resources/**",
            "/configuration/ui",
            "/configuration/security",
            "/swagger-ui/**",
            "/webjars/**",
            "/swagger-ui.html",
            "/addevent"};

    private static final WebExpressionAuthorizationManager INTERNAL_ACCESS =
            new WebExpressionAuthorizationManager("hasIpAddress('127.0.0.1') or hasIpAddress('0:0:0:0:0:0:0:1')");

    private final UserDetailsService userDetailsService;

    private final LogoutHandler logoutHandler;

    @Autowired
    public SecurityConfiguration(UserDetailsService userDetailsService, LogoutHandler logoutHandler) {
        this.userDetailsService = userDetailsService;
        this.logoutHandler = logoutHandler;
    }

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

    @Bean
    public PasswordEncoder passwordEncoder() {
        return PasswordEncoderFactories.createDelegatingPasswordEncoder();
    }

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

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http, JwtAuthenticationFilter jwtAuthFilter) throws Exception {

        if (csrfEnabled) {
            http.csrf(csrf -> csrf.ignoringRequestMatchers(antMatcher("/h2-console/**")));
        } else {
            // csrf is disabled for dev and test
            http.csrf(AbstractHttpConfigurer::disable);
        }
        http.headers(headers -> headers.frameOptions(HeadersConfigurer.FrameOptionsConfig::sameOrigin));
        http.authorizeHttpRequests(auth ->
                        auth.requestMatchers(WHITE_LIST_URL).permitAll()
                            .requestMatchers(antMatcher(HttpMethod.GET, "/")).permitAll()
                            .requestMatchers("/api/v1/users/**").authenticated()
                            .requestMatchers("/api/v1/profile/**").authenticated()
                            .requestMatchers(GENERAL_API_URL).authenticated()
                            .requestMatchers(antMatcher("/h2-console/**")).access(INTERNAL_ACCESS)
                            .requestMatchers(antMatcher("/actuator/**")).access(INTERNAL_ACCESS)
                            .requestMatchers(INTERNAL_WHITE_LIST_URL).access(INTERNAL_ACCESS)
                            .anyRequest().authenticated()
                )
                .sessionManagement(session -> session.sessionCreationPolicy(STATELESS))
                .authenticationProvider(authenticationProvider())
                .addFilterBefore(jwtAuthFilter, UsernamePasswordAuthenticationFilter.class)
                .logout(logout -> logout
                        .logoutUrl("/api/v1/auth/logout")
                        .addLogoutHandler(logoutHandler)
                        .logoutSuccessHandler((request,
                                               response,
                                               authentication) -> SecurityContextHolder.clearContext()));

        return http.build();
    }
}