package com.fdage.shiro;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import lombok.extern.log4j.Log4j2;
import org.apache.shiro.mgt.DefaultSessionStorageEvaluator;
import org.apache.shiro.mgt.DefaultSubjectDAO;
import org.apache.shiro.spring.LifecycleBeanPostProcessor;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.http.MediaType;

import javax.servlet.Filter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Log4j2
@Configuration
public class ShiroConfig {

    @Bean("securityManager")
    public DefaultWebSecurityManager getManager(MyRealm realm) {
        DefaultWebSecurityManager manager = new DefaultWebSecurityManager();
        // 使用自己的realm
        manager.setRealm(realm);

        /*
         * 关闭shiro自带的session，详情见文档
         * http://shiro.apache.org/session-management.html#SessionManagement-StatelessApplications%28Sessionless%29
         */
        DefaultSubjectDAO subjectDAO = new DefaultSubjectDAO();
        DefaultSessionStorageEvaluator defaultSessionStorageEvaluator = new DefaultSessionStorageEvaluator();
        defaultSessionStorageEvaluator.setSessionStorageEnabled(false);
        subjectDAO.setSessionStorageEvaluator(defaultSessionStorageEvaluator);
        manager.setSubjectDAO(subjectDAO);

        return manager;
    }

    @Bean("shiroFilter")
    public ShiroFilterFactoryBean factory(DefaultWebSecurityManager securityManager) {
        ShiroFilterFactoryBean factoryBean = new ShiroFilterFactoryBean();

        // 添加自己的过滤器并且取名为jwt
        Map<String, Filter> filterMap = new HashMap<>();
        filterMap.put("jwt", new JWTFilter());

        factoryBean.setFilters(filterMap);

        factoryBean.setSecurityManager(securityManager);
        factoryBean.setUnauthorizedUrl("/401");

        /*
         * 自定义url规则
         * http://shiro.apache.org/web.html#urls-
         */
        Map<String, String> filterRuleMap = new HashMap<>();

        // 不拦截
        filterRuleMap.put("/login", "anon");
        filterRuleMap.put("/logout", "anon");
        filterRuleMap.put("/", "anon");


        // swagger 不拦截
        filterRuleMap.put("/swagger-resources/**", "anon");
        filterRuleMap.put("/webjars/**", "anon");
        filterRuleMap.put("/v2/**", "anon");
        filterRuleMap.put("/doc.html/**", "anon");


        // 所有请求通过我们自己的JWT Filter
        filterRuleMap.put("/zhoushan/**", "jwt");


        // 访问401和404页面不通过我们的Filter
        filterRuleMap.put("/401", "anon");
        factoryBean.setFilterChainDefinitionMap(filterRuleMap);
        return factoryBean;
    }

    /**
     * 下面的代码是添加注解支持
     */
    @Bean
    @DependsOn("lifecycleBeanPostProcessor")
    public DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator() {
        DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();
        // 强制使用cglib，防止重复代理和可能引起代理出错的问题
        // https://zhuanlan.zhihu.com/p/29161098
        defaultAdvisorAutoProxyCreator.setProxyTargetClass(true);
        return defaultAdvisorAutoProxyCreator;
    }

    @Bean
    public LifecycleBeanPostProcessor lifecycleBeanPostProcessor() {
        return new LifecycleBeanPostProcessor();
    }

    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(DefaultWebSecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor advisor = new AuthorizationAttributeSourceAdvisor();
        advisor.setSecurityManager(securityManager);
        return advisor;
    }


    /**
     * fastJson相关设置
     * Dto包含json,需要配置不然会异常
     * @return
     */
    @Bean
    public HttpMessageConverters customConverters() {
//        log.warn("run customConverters");


        FastJsonHttpMessageConverter fastJson = new FastJsonHttpMessageConverter();

        // 创建FastJson信息转换对象
        FastJsonConfig fastJsonConfig = new FastJsonConfig();


        // 设置全程返回时间
        fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
        // 设置返回值为null是时输出，不写的话，null 字段 不返回。也可以设置返回空串
        fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteNullStringAsEmpty);
        fastJson.setFastJsonConfig(fastJsonConfig);

        //3、中文乱码解决方案
        List<MediaType> mediaTypeList = new ArrayList<>();
        mediaTypeList.add(MediaType.APPLICATION_JSON_UTF8);
        mediaTypeList.add(MediaType.valueOf("text/html;charset=UTF-8"));


        //4、将转换规则应用于转换对象
        fastJson.setSupportedMediaTypes(mediaTypeList);


        return new HttpMessageConverters(fastJson);
    }





}