package com.gxzc.zen.umps.config

import com.gxzc.zen.umps.constant.ZenHttpSession
import com.gxzc.zen.umps.filter.AjaxAuthorizationFilter
import com.gxzc.zen.umps.filter.UrlPermissionsFilter
import com.gxzc.zen.umps.filter.ZenCorsAnonymousFilter
import com.gxzc.zen.umps.filter.ZenCorsPathMatchingFilter
import org.apache.shiro.authc.credential.HashedCredentialsMatcher
import org.apache.shiro.spring.LifecycleBeanPostProcessor
import org.apache.shiro.spring.web.ShiroFilterFactoryBean
import org.apache.shiro.web.filter.authc.AnonymousFilter
import org.apache.shiro.web.mgt.DefaultWebSecurityManager
import org.apache.shiro.web.servlet.SimpleCookie
import org.springframework.boot.context.properties.ConfigurationProperties
import org.springframework.boot.web.servlet.FilterRegistrationBean
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.context.annotation.DependsOn
import org.springframework.core.annotation.Order
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory
import org.springframework.data.redis.core.RedisTemplate
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer
import org.springframework.data.redis.serializer.StringRedisSerializer
import org.springframework.web.filter.DelegatingFilterProxy
import javax.servlet.DispatcherType
import javax.servlet.Filter


/**
 * Shiro配置
 * @author NorthLan
 * @date 2018/4/21
 * @url https://noahlan.com
 */
@Configuration
class ShiroConfig {

    @Bean
    @ConfigurationProperties(prefix = "shiro.redis")
    fun shiroRedisProperties(): ShiroRedisProperties {
        return ShiroRedisProperties()
    }

    @Bean("shiroFilterRegistrationBean")
    @DependsOn("shiroFilter")
    fun filterRegistrationBean(): FilterRegistrationBean {
        return FilterRegistrationBean().apply {
            filter = DelegatingFilterProxy("shiroFilter")
            isEnabled = true
            addUrlPatterns("/*")
            setDispatcherTypes(DispatcherType.REQUEST)
        }
    }

    @Bean(name = ["shiroFilter"])
    @Order(2)
    fun shiroFilter(): ShiroFilterFactoryBean {
        return ShiroFilterFactoryBean().apply {
            securityManager = securityManager()
//            loginUrl = "/login"
//            unauthorizedUrl = "/unauthor"

            filters = hashMapOf<String, Filter>(
                    "canon" to ZenCorsAnonymousFilter(),
                    "cors" to ZenCorsPathMatchingFilter(),
                    "perms" to UrlPermissionsFilter(),
                    "authc" to AjaxAuthorizationFilter(),
                    "anon" to AnonymousFilter()
            )
            /**
             * anon（匿名）  org.apache.shiro.web.filter.authc.AnonymousFilter
             * authc（身份验证）       org.apache.shiro.web.filter.authc.FormAuthenticationFilter
             * authcBasic（http基本验证）    org.apache.shiro.web.filter.authc.BasicHttpAuthenticationFilter
             * logout（退出）        org.apache.shiro.web.filter.authc.LogoutFilter
             * noSessionCreation（不创建session） org.apache.shiro.web.filter.session.NoSessionCreationFilter
             * perms(许可验证)  org.apache.shiro.web.filter.authz.PermissionsAuthorizationFilter
             * port（端口验证）   org.apache.shiro.web.filter.authz.PortFilter
             * rest  (rest方面)  org.apache.shiro.web.filter.authz.HttpMethodPermissionFilter
             * roles（权限验证）  org.apache.shiro.web.filter.authz.RolesAuthorizationFilter
             * ssl （ssl方面）   org.apache.shiro.web.filter.authz.SslFilter
             * member （用户方面）  org.apache.shiro.web.filter.authc.UserFilter
             * user  表示用户不一定已通过认证,只要曾被Shiro记住过登录状态的用户就可以正常发起请求,比如rememberMe
             */
            filterChainDefinitionMap = linkedMapOf<String, String>( // BUG 此处一定要使用 linkedHashMap 否则顺序有问题
                    "/auth/setcookie" to "canon", // 设置cookie
                    "/auth/check" to "canon", // 检查登录状态
//                    "/auth/logout" to "logout", // 登出
                    "/test/**" to "canon", // 测试 免登录
                    "/upload/**" to "canon", // 上传免登录
                    "/api/**" to "canon", // api 免登陆
                    ////////////////////// 静态资源 /////////////////////
                    "/v2/api-docs" to "canon",
                    "/swagger-resources/**" to "anon",
                    "/swagger-ui.html" to "anon",
                    "/webjars*" to "anon",
                    "/webjars/**" to "anon",
                    "/druid/**" to "anon",
                    "/druid/sql.json" to "anon",
                    "/**/favicon.*" to "anon",
                    ////////////////////// 静态资源 /////////////////////
                    "/**" to "cors,authc,perms" // 对于其他未配置的所有url 先设置cors头 再进行登陆判定 最后判定权限
            )
        }
    }

    @Bean(name = ["securityManager"])
    fun securityManager(): DefaultWebSecurityManager {
        return DefaultWebSecurityManager().apply {
            setRealm(userRealm())
            cacheManager = redisCacheManager()
            sessionManager = defaultWebSessionManager()
        }
    }

    @Bean(name = ["sessionManager"])
    fun defaultWebSessionManager(): ZenWebSessionManager {
        return ZenWebSessionManager().apply {
            setCacheManager(redisCacheManager())
            globalSessionTimeout = 604800 * 1000
            isDeleteInvalidSessions = true
            isSessionValidationSchedulerEnabled = true
            isDeleteInvalidSessions = true
            sessionDAO = redisSessionDAO()
            sessionIdCookie = SimpleCookie(ZenHttpSession.DEFAULT_SESSION_ID_NAME).apply {
                isHttpOnly = true
                maxAge = 604800
            }
        }
    }

    @Bean
    fun redisSessionDAO(): ShiroRedisSessionDAO {
        return ShiroRedisSessionDAO(redisTemplate(), shiroRedisProperties())
    }

    @Bean
    @DependsOn(value = ["shiroLifecycleBeanPostProcessor", "shrioRedisCacheManager"])
    fun userRealm(): ZenShiroRealm {
        return ZenShiroRealm().apply {
            cacheManager = redisCacheManager()
            isCachingEnabled = true
            isAuthenticationCachingEnabled = true
            isAuthorizationCachingEnabled = true

            //TODO 以下 hash 验证,后期的重试 ban 可重写此类实现
            credentialsMatcher = HashedCredentialsMatcher().also {
                it.hashAlgorithmName = "md5"
                it.hashIterations = 2 // 两次md5
            }
        }
    }

    @Bean(name = ["shrioRedisCacheManager"])
    @DependsOn(value = ["shiroRedisTemplate"])
    fun redisCacheManager(): ShiroRedisCacheManager {
        return ShiroRedisCacheManager(redisTemplate(), shiroRedisProperties())
    }

    @Bean(name = ["shiroRedisTemplate"])
    fun redisTemplate(): RedisTemplate<String, Any> {
        return RedisTemplate<String, Any>().apply {
            connectionFactory = connectionFactory()

            val stringSerializer = StringRedisSerializer()
            keySerializer = stringSerializer
            valueSerializer = JdkSerializationRedisSerializer()
            hashKeySerializer = stringSerializer
            hashValueSerializer = Jackson2JsonRedisSerializer(Any::class.java)
        }
    }

    @Bean("shiroRedisConnectionFactory")
    fun connectionFactory(): JedisConnectionFactory {
        val properties = shiroRedisProperties()
        return JedisConnectionFactory().apply {
            database = properties.database
            hostName = properties.host
            password = properties.password
            port = properties.port
            timeout = properties.timeout
        }
    }

    @Bean("shiroLifecycleBeanPostProcessor")
    fun lifecycleBeanPostProcessor(): LifecycleBeanPostProcessor {
        return LifecycleBeanPostProcessor()
    }
}