package com.kiisoo.ic.config;

import com.kiisoo.ic.filter.AjaxSessionTimeoutFilter;
import com.kiisoo.ic.utils.PasswordEncry;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.codec.Base64;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.CookieRememberMeManager;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.apache.shiro.web.servlet.SimpleCookie;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver;

import javax.servlet.Filter;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;

/**
 * shiro认证配置
 *
 * @author Arvin
 */
@Configuration
public class ShiroConfig {

    /**
     * shiro过滤器
     */
    @Bean
    public ShiroFilterFactoryBean shiroFilter(org.apache.shiro.mgt.SecurityManager securityManager) {
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        shiroFilterFactoryBean.setSecurityManager(securityManager);

        Map<String, Filter> filters = shiroFilterFactoryBean.getFilters();
        filters.put("authc", new AjaxSessionTimeoutFilter());

        // 拦截器.
        Map<String, String> filterChainDefinitionMap = new LinkedHashMap<>();
        // 配置不会被拦截的链接 顺序判断
        filterChainDefinitionMap.put("/css/**", "anon");
        filterChainDefinitionMap.put("/fonts/**", "anon");
        filterChainDefinitionMap.put("/image/**", "anon");
        filterChainDefinitionMap.put("/img/**", "anon");
        filterChainDefinitionMap.put("/js/**", "anon");
        filterChainDefinitionMap.put("/realtime/**", "anon");
        filterChainDefinitionMap.put("/view/**", "anon");
        filterChainDefinitionMap.put("/templates/**", "anon");
        filterChainDefinitionMap.put("/login", "anon");
        // 配置退出 过滤器,其中的具体的退出代码Shiro已经替我们实现了
        filterChainDefinitionMap.put("/logout", "logout");
        // 过滤链定义，从上向下顺序执行，一般将/**放在最为下边 -->:这是一个坑呢，一不小心代码就不好使了
        // authc:所有url都必须认证通过才可以访问; anon:所有url都都可以匿名访问
        filterChainDefinitionMap.put("/*", "authc");
        filterChainDefinitionMap.put("/**", "authc");
        filterChainDefinitionMap.put("/*.*", "authc");
        // 如果不设置默认会自动寻找Web工程根目录下的"/login.jsp"页面
        shiroFilterFactoryBean.setLoginUrl("/login");
        // 登录成功后要跳转的链接
        shiroFilterFactoryBean.setSuccessUrl("/index");

        // 未授权界面;
        shiroFilterFactoryBean.setUnauthorizedUrl("/403");
        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
        return shiroFilterFactoryBean;
    }

    /**
     * 自定义认证
     *
     * @return AuthorizationRealm
     */
    @Bean
    public AuthorizationRealm authorizationRealm() {
        return new AuthorizationRealm();
    }

    /**
     * 会话管理器
     *
     * @return SecurityManager
     */
    @Bean
    public org.apache.shiro.mgt.SecurityManager securityManager() {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        securityManager.setRealm(authorizationRealm());
        securityManager.setRememberMeManager(rememberMeManager());
        return securityManager;
    }

    /**
     * cookie对象;
     *
     * @return SimpleCookie
     */
    @Bean
    public SimpleCookie rememberMeCookie() {
        SimpleCookie simpleCookie = new SimpleCookie("rememberMe");
        simpleCookie.setMaxAge(259200);
        return simpleCookie;
    }

    /**
     * cookie管理对象;
     *
     * @return CookieRememberMeManager
     */
    @Bean
    public CookieRememberMeManager rememberMeManager() {
        CookieRememberMeManager cookieRememberMeManager = new CookieRememberMeManager();
        cookieRememberMeManager.setCookie(rememberMeCookie());
        cookieRememberMeManager.setCipherKey(Base64.decode("2AvVhdsgUs0FSA3SDFAdag=="));
        return cookieRememberMeManager;
    }

    /**
     * 凭证匹配器
     * （由于我们的密码校验交给Shiro的SimpleAuthenticationInfo进行处理了）
     *
     * @return HashedCredentialsMatcher
     */
    @Bean
    public HashedCredentialsMatcher hashedCredentialsMatcher() {
        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
        hashedCredentialsMatcher.setHashAlgorithmName(PasswordEncry.algorithmName);
        hashedCredentialsMatcher.setHashIterations(PasswordEncry.hashIterations);
        hashedCredentialsMatcher.setStoredCredentialsHexEncoded(true);
        return hashedCredentialsMatcher;
    }

    /**
     * 开启shiro aop注解支持.
     * 使用代理方式;所以需要开启代码支持;
     *
     * @param securityManager 会话管理器
     * @return AuthorizationAttributeSourceAdvisor
     */
    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(org.apache.shiro.mgt.SecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor =
                new AuthorizationAttributeSourceAdvisor();
        authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
        return authorizationAttributeSourceAdvisor;
    }

    @Bean(name = "simpleMappingExceptionResolver")
    public SimpleMappingExceptionResolver createSimpleMappingExceptionResolver() {
        SimpleMappingExceptionResolver r = new SimpleMappingExceptionResolver();
        Properties mappings = new Properties();
        // 数据库异常处理
        mappings.setProperty("DatabaseException", "databaseError");
        mappings.setProperty("UnauthorizedException", "403");
        // None by default
        r.setExceptionMappings(mappings);
        // No default
        r.setDefaultErrorView("error");
        // Default is "exception"
        r.setExceptionAttribute("ex");
        // r.setWarnLogCategory("example.MvcLogger");     // No default
        return r;
    }
}