package com.kxs.common.security.component;

import com.kxs.common.core.constant.SecurityConstants;
import com.kxs.common.security.support.CustomeOAuth2AccessTokenGenerator;
import com.kxs.common.security.support.core.CustomeOAuth2TokenCustomizer;
import com.kxs.common.security.support.core.FormIdentityLoginConfigurer;
import com.kxs.common.security.support.core.SkyDaoAuthenticationProvider;
import com.kxs.common.security.support.handler.SkyAuthenticationFailureEventHandler;
import com.kxs.common.security.support.handler.SkyAuthenticationSuccessEventHandler;
import com.kxs.common.security.support.password.OAuth2ResourceOwnerPasswordAuthenticationConverter;
import com.kxs.common.security.support.password.OAuth2ResourceOwnerPasswordAuthenticationProvider;
import com.kxs.common.security.support.sms.OAuth2ResourceOwnerSmsAuthenticationConverter;
import com.kxs.common.security.support.sms.OAuth2ResourceOwnerSmsAuthenticationProvider;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.security.authentication.AuthenticationManager;
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.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.config.annotation.web.configurers.HeadersConfigurer;
import org.springframework.security.config.annotation.web.configurers.RequestCacheConfigurer;
import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
import org.springframework.security.oauth2.server.authorization.config.annotation.web.configurers.OAuth2AuthorizationServerConfigurer;
import org.springframework.security.oauth2.server.authorization.settings.AuthorizationServerSettings;
import org.springframework.security.oauth2.server.authorization.token.DelegatingOAuth2TokenGenerator;
import org.springframework.security.oauth2.server.authorization.token.OAuth2RefreshTokenGenerator;
import org.springframework.security.oauth2.server.authorization.token.OAuth2TokenGenerator;
import org.springframework.security.oauth2.server.authorization.web.authentication.*;
import org.springframework.security.oauth2.server.resource.introspection.OpaqueTokenIntrospector;
import org.springframework.security.web.DefaultSecurityFilterChain;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.AuthenticationConverter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

import java.util.Arrays;

/**
 * @author 没秃顶的码农
 * @date 2022-06-04
 *
 * 资源服务器认证授权配置
 */
@RequiredArgsConstructor
@Configuration
public class SkyResourceServerConfiguration {

	private final OAuth2AuthorizationService authorizationService;

	@Bean
	@Order(1)
	SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
		// 过滤器链
		http.securityMatcher(SecurityConstants.OAUTH_TOKEN_URL);

		OAuth2AuthorizationServerConfigurer authorizationServerConfigurer = new OAuth2AuthorizationServerConfigurer();

		http.apply(authorizationServerConfigurer.tokenEndpoint((tokenEndpoint) -> {// 个性化认证授权端点
			tokenEndpoint.accessTokenRequestConverter(accessTokenRequestConverter()) // 注入自定义的授权认证Converter
				.accessTokenResponseHandler(new SkyAuthenticationSuccessEventHandler()) // 登录成功处理器
				.errorResponseHandler(new SkyAuthenticationFailureEventHandler());// 登录失败处理器
		}).clientAuthentication(oAuth2ClientAuthenticationConfigurer -> // 个性化客户端认证
		oAuth2ClientAuthenticationConfigurer.errorResponseHandler(new SkyAuthenticationFailureEventHandler()))// 处理客户端认证异常
			.authorizationEndpoint(authorizationEndpoint -> authorizationEndpoint// 授权码端点个性化confirm页面
				.consentPage(SecurityConstants.CUSTOM_CONSENT_PAGE_URI)));

		AntPathRequestMatcher[] requestMatchers = new AntPathRequestMatcher[] {};

		http.authorizeHttpRequests(authorizeRequests -> {
			// 自定义接口、端点暴露
			authorizeRequests.requestMatchers(requestMatchers).permitAll();
			authorizeRequests.anyRequest().authenticated();
		})
			.apply(authorizationServerConfigurer.authorizationService(authorizationService)// redis存储token的实现
				.authorizationServerSettings(
						AuthorizationServerSettings.builder().issuer(SecurityConstants.PROJECT_LICENSE).build()));
		http.apply(new FormIdentityLoginConfigurer());
		DefaultSecurityFilterChain securityFilterChain = http.build();

		// 注入自定义授权模式实现
		addCustomOAuth2GrantAuthenticationProvider(http);
		return securityFilterChain;
	}

	/**
	 * 暴露静态资源
	 * <p>
	 * <a href="https://github.com/spring-projects/spring-security/issues/10938">...</a>
	 * @param http
	 * @return
	 * @throws Exception
	 */
	@Bean
	@Order(0)
	SecurityFilterChain resources(HttpSecurity http) throws Exception {
		http.securityMatchers((matchers) -> matchers.requestMatchers("/actuator/**", "/css/**", "/error"))
			.authorizeHttpRequests((authorize) -> authorize.anyRequest().permitAll())
			.requestCache(RequestCacheConfigurer::disable)
			.securityContext(AbstractHttpConfigurer::disable)
			.sessionManagement(AbstractHttpConfigurer::disable);
		return http.build();
	}

	/**
	 * 令牌生成规则实现 </br>
	 * client:username:uuid
	 * @return OAuth2TokenGenerator
	 */
	@Bean
	public OAuth2TokenGenerator oAuth2TokenGenerator() {
		CustomeOAuth2AccessTokenGenerator accessTokenGenerator = new CustomeOAuth2AccessTokenGenerator();
		// 注入Token 增加关联用户信息
		accessTokenGenerator.setAccessTokenCustomizer(new CustomeOAuth2TokenCustomizer());
		return new DelegatingOAuth2TokenGenerator(accessTokenGenerator, new OAuth2RefreshTokenGenerator());
	}

	/**
	 * request -> xToken 注入请求转换器
	 * @return DelegatingAuthenticationConverter
	 */
	private AuthenticationConverter accessTokenRequestConverter() {
		return new DelegatingAuthenticationConverter(Arrays.asList(
				new OAuth2ResourceOwnerPasswordAuthenticationConverter(),
				new OAuth2ResourceOwnerSmsAuthenticationConverter(), new OAuth2RefreshTokenAuthenticationConverter(),
				new OAuth2ClientCredentialsAuthenticationConverter(),
				new OAuth2AuthorizationCodeAuthenticationConverter(),
				new OAuth2AuthorizationCodeRequestAuthenticationConverter()));
	}

	/**
	 * 注入授权模式实现提供方
	 *
	 * 1. 密码模式 </br>
	 * 2. 短信登录 </br>
	 *
	 */
	@SuppressWarnings("unchecked")
	private void addCustomOAuth2GrantAuthenticationProvider(HttpSecurity http) {
		AuthenticationManager authenticationManager = http.getSharedObject(AuthenticationManager.class);
		OAuth2AuthorizationService authorizationService = http.getSharedObject(OAuth2AuthorizationService.class);

		OAuth2ResourceOwnerPasswordAuthenticationProvider resourceOwnerPasswordAuthenticationProvider = new OAuth2ResourceOwnerPasswordAuthenticationProvider(
				authenticationManager, authorizationService, oAuth2TokenGenerator());

		OAuth2ResourceOwnerSmsAuthenticationProvider resourceOwnerSmsAuthenticationProvider = new OAuth2ResourceOwnerSmsAuthenticationProvider(
				authenticationManager, authorizationService, oAuth2TokenGenerator());

		// 处理 UsernamePasswordAuthenticationToken
		http.authenticationProvider(new SkyDaoAuthenticationProvider());
		// 处理 OAuth2ResourceOwnerPasswordAuthenticationToken
		http.authenticationProvider(resourceOwnerPasswordAuthenticationProvider);
		// 处理 OAuth2ResourceOwnerSmsAuthenticationToken
		http.authenticationProvider(resourceOwnerSmsAuthenticationProvider);
	}

}
