package com.hydropower.framework.config;

import com.google.common.collect.Lists;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.checkerframework.checker.nullness.qual.Nullable;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.annotation.web.configurers.ExpressionUrlAuthorizationConfigurer;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.security.web.header.Header;
import org.springframework.security.web.header.writers.CrossOriginOpenerPolicyHeaderWriter;
import org.springframework.security.web.header.writers.ReferrerPolicyHeaderWriter;
import org.springframework.security.web.header.writers.StaticHeadersWriter;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import com.hydropower.framework.config.properties.PermitAllUrlProperties;
import com.hydropower.framework.security.filter.JwtAuthenticationTokenFilter;
import com.hydropower.framework.security.handle.AuthenticationEntryPointImpl;
import com.hydropower.framework.security.handle.LogoutSuccessHandlerImpl;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * spring security配置
 *
 * @author ruoyi
 */
@Slf4j
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter
{
    /**
     * 自定义用户认证逻辑
     */
    @Autowired
    private UserDetailsService userDetailsService;

    /**
     * 认证失败处理类
     */
    @Autowired
    private AuthenticationEntryPointImpl unauthorizedHandler;

    /**
     * 退出处理类
     */
    @Autowired
    private LogoutSuccessHandlerImpl logoutSuccessHandler;

    /**
     * token认证过滤器
     */
    @Autowired
    private JwtAuthenticationTokenFilter authenticationTokenFilter;

    /**
     * 允许匿名访问的地址
     */
    @Autowired
    private PermitAllUrlProperties permitAllUrl;

    /**
     * 解决 无法直接注入 AuthenticationManager
     *
     * @return
     * @throws Exception
     */
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception
    {
        return super.authenticationManagerBean();
    }

    /**
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception
    {
        // 注解标记允许匿名访问的url
        ExpressionUrlAuthorizationConfigurer<HttpSecurity>.ExpressionInterceptUrlRegistry registry = httpSecurity.authorizeRequests();
        permitAllUrl.getUrls().forEach(url -> {
            registry.antMatchers(url).permitAll();
            log.info("add ignore auth url: {}", url);
        });

        httpSecurity
                // CSRF禁用，因为不使用session
                .csrf().disable()
                // 认证失败处理类
                .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
                // 基于token，所以不需要session
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                // 过滤请求
                .authorizeRequests()
                // 对于登录login 注册register 验证码captchaImage 允许匿名访问
                .antMatchers("/login", "/register", "/captchaImage","/websocket/**","/rabbitmq/**","/api/**").permitAll()
                // 静态资源，可匿名访问
                .antMatchers(HttpMethod.GET, "/", "/*.html", "/**/*.html", "/**/*.css", "/**/*.js", "/profile/**").permitAll()
                .antMatchers("/swagger-ui.html", "/favicon.ico", "/swagger-resources/**", "/webjars/**", "/*/api-docs", "/druid/**", "/static/**").permitAll()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated()
                .and()
                .cors().configurationSource(corsConfigurationSource())
                .and()
                // 禁用HTTP响应标头
                .headers().cacheControl().disable().and()
                .headers(headers -> {

                    headers.referrerPolicy().policy(ReferrerPolicyHeaderWriter.ReferrerPolicy.STRICT_ORIGIN_WHEN_CROSS_ORIGIN);
                    headers.frameOptions().disable();

                    final List<@Nullable Header> headerList = Lists.newArrayList();
                    headerList.add(new Header("Access-Control-Allow-Origin", "*"));
                    headerList.add(new Header("Access-Control-Allow-Methods", "*"));
                    headerList.add(new Header("Access-Control-Max-Age", "3600"));
                    headers.addHeaderWriter(new StaticHeadersWriter(headerList));


                });
        // 添加Logout filter
        httpSecurity.logout().logoutUrl("/logout").logoutSuccessHandler(logoutSuccessHandler);
        // 添加JWT filter
        httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
        // 添加CORS filter
        //httpSecurity.addFilterBefore(authenticationTokenFilter, LogoutFilter.class);
        //httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
    }

    //配置跨域访问资源
    private CorsConfigurationSource corsConfigurationSource() {
        CorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOriginPattern("*");
        corsConfiguration.addAllowedOrigin("*"); // 同源配置，*表示任何请求都视为同源，若需指定ip和端口可以改为如“localhost：8080”，多个以“，”分隔；
        corsConfiguration.addAllowedHeader("*");// header，允许哪些header，本案中使用的是token，此处可将*替换为token；
        corsConfiguration.addAllowedMethod("*"); // 允许的请求方法，PSOT、GET等
        ((UrlBasedCorsConfigurationSource) source).registerCorsConfiguration("/**", corsConfiguration); // 配置允许跨域访问的url
        return source;
    }

    /**
     * 强散列哈希加密实现
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder()
    {
        return new BCryptPasswordEncoder();
    }

    /**
     * 身份认证接口
     */
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception
    {
        auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
    }
}