using ServiceStack.Redis;
using ServiceStack.Redis.Generic;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace VueWebCoreApi.Tools
{
    public class RedisHelper
    {
        /// <summary>
        /// redis获取连接配置字符串
        /// </summary>
        private static readonly string RedisIpConnString = AppSetting.GetAppSetting("RedisConnIp");
        private static readonly string RedisPortConnString = AppSetting.GetAppSetting("RedisConnPort");
        private static readonly string RedisKeyTimeCont = AppSetting.GetAppSetting("RedisKeyTimeCont");


        private static RedisClient Redis = new RedisClient(RedisIpConnString, Convert.ToInt32(RedisPortConnString));
        //缓存池  
        static PooledRedisClientManager prcm = new PooledRedisClientManager();


        //默认缓存过期时间单位秒  
        public int secondsTimeOut = Convert.ToInt32(RedisKeyTimeCont);
        private static readonly Dictionary<int, PooledRedisClientManager> pools = new Dictionary<int, PooledRedisClientManager>();
        /// <summary>  
        /// 缓冲池  
        /// </summary>  
        /// <param name="readWriteHosts"></param>  
        /// <param name="readOnlyHosts"></param>  
        /// <returns></returns>  
        private static void CreateManager(string[] readWriteHosts, string[] readOnlyHosts)
        {
            for (int i = 0; i <= 15; i++)
            {
                PooledRedisClientManager prc = new PooledRedisClientManager(readWriteHosts, readOnlyHosts,
                new RedisClientManagerConfig
                {
                    MaxWritePoolSize = readWriteHosts.Length * 512,  //最大写链接数
                    MaxReadPoolSize = readOnlyHosts.Length * 512,    //最大读链接数
                    AutoStart = true,                              //自动重启
                }, i, 200, 10);// { RedisClientFactory = (IRedisClientFactory)RedisCacheClientFactory.Instance.CreateRedisClient("127.0.0.1", 6379) }; 
                pools.Add(i, prc);
            }
        }
        public static PooledRedisClientManager ChooseRedisInstance(int database)
        {
            if (database > 16) return pools[0];
            return pools[database];
        }
        /// <summary>  
        /// 构造函数  
        /// </summary>  
        /// <param name="openPooledRedis">是否开启缓冲池</param>  
        static RedisHelper()
        {
            //CreateManager(new string[] { "127.0.0.1:6379" }, new string[] { "127.0.0.1:6379" });
            CreateManager(new string[] { RedisIpConnString + ":" + RedisPortConnString }, new string[] { RedisIpConnString + ":" + RedisPortConnString });
            //Redis = prcm.GetClient() as RedisClient;
        }

        #region Key/Value存储  
        /// <summary>  
        /// 设置缓存  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="key">缓存建</param>  
        /// <param name="t">缓存值</param>  
        /// <param name="timeout">过期时间，单位秒,-1：不过期，0：默认过期时间</param>  
        /// <returns></returns>  
        public bool Set<T>(string key, T t, int timeout = 0, int db = 0)
        {
            Redis = (RedisClient)ChooseRedisInstance(db).GetClient();
            var values = Redis.Add<T>(key, t);
            if (timeout >= 0)
            {
                if (timeout > 0)
                {
                    secondsTimeOut = timeout;
                }
                Redis.Expire(key, secondsTimeOut);
            }
            Redis.Dispose();
            return values;
        }

        /// <summary>
        /// 设置失效时间
        /// </summary>
        /// <param name="key"></param>
        /// <param name="expiry"></param>
        /// <returns></returns>
        public bool KeyExpire(string key, int expiry)
        {
            return Redis.Expire(key, expiry);
        }
        /// <summary>  
        /// 获取  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="key"></param>  
        /// <returns></returns>  
        public T Get<T>(string key, int db = 0)
        {
            Redis = (RedisClient)ChooseRedisInstance(db).GetClient();
            var values = Redis.Get<T>(key);
            Redis.Dispose();
            return values;
        }
        /// <summary>  
        /// 删除  
        /// </summary>  
        /// <param name="key"></param>  
        /// <returns></returns>  
        public bool Remove(string key, int db = 0)
        {
            Redis = (RedisClient)ChooseRedisInstance(db).GetClient();
            Redis.Dispose();
            return Redis.Remove(key);
        }


        //public static bool Add<T>(string key, T t, int timeout)
        //{
        //    var values = Redis.Add<T>(key, t);
        //    if (timeout >= 0)
        //    {
        //        if (timeout > 0)
        //        {
        //            secondsTimeOut = timeout;
        //        }
        //        Redis.Expire(key, secondsTimeOut);
        //    }
        //    return values;
        //}
        #endregion


        #region 链表操作  
        /// <summary>  
        /// 根据IEnumerable数据添加链表  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="listId"></param>  
        /// <param name="values"></param>  
        /// <param name="timeout"></param>  
        public void AddList<T>(string listId, IEnumerable<T> values, int timeout = 0)
        {
            Redis.Expire(listId, 60);
            IRedisTypedClient<T> iredisClient = Redis.As<T>();
            if (timeout >= 0)
            {
                if (timeout > 0)
                {
                    secondsTimeOut = timeout;
                }
                Redis.Expire(listId, secondsTimeOut);
            }
            var redisList = iredisClient.Lists[listId];
            redisList.AddRange(values);
            iredisClient.Save();
            Redis.Dispose();
        }
        /// <summary>  
        /// 添加单个实体到链表中  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="listId"></param>  
        /// <param name="Item"></param>  
        /// <param name="timeout"></param>  
        public void AddEntityToList<T>(string listId, T Item, int timeout = 0, int db = 0)
        {
            Redis = (RedisClient)ChooseRedisInstance(db).GetClient();
            IRedisTypedClient<T> iredisClient = Redis.As<T>();
            if (timeout >= 0)
            {
                if (timeout > 0)
                {
                    secondsTimeOut = timeout;
                }
                Redis.Expire(listId, secondsTimeOut);
            }
            var redisList = iredisClient.Lists[listId];
            redisList.Add(Item);
            iredisClient.Save();
            Redis.Dispose();
        }
        /// <summary>  
        /// 获取链表  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="listId"></param>  
        /// <returns></returns>  
        public IEnumerable<T> GetList<T>(string listId, int db = 0)
        {
            Redis = (RedisClient)ChooseRedisInstance(db).GetClient();
            IRedisTypedClient<T> iredisClient = Redis.As<T>();
            Redis.Dispose();
            return iredisClient.Lists[listId];
        }
        /// <summary>  
        /// 在链表中删除单个实体  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="listId"></param>  
        /// <param name="t"></param>  
        public void RemoveEntityFromList<T>(string listId, T t, int db = 0)
        {
            Redis = (RedisClient)ChooseRedisInstance(db).GetClient();
            IRedisTypedClient<T> iredisClient = Redis.As<T>();
            var redisList = iredisClient.Lists[listId];
            redisList.RemoveValue(t);
            iredisClient.Save();
            Redis.Dispose();
        }
        /// <summary>  
        /// 根据lambada表达式删除符合条件的实体  
        /// </summary>  
        /// <typeparam name="T"></typeparam>  
        /// <param name="listId"></param>  
        /// <param name="func"></param>  
        public void RemoveEntityFromList<T>(string listId, Func<T, bool> func)
        {
            //using (IRedisTypedClient<T> iredisClient = Redis.As<T>())
            //{
            //    var redisList = iredisClient.Lists[listId];
            //    T value = redisList.Where(func).FirstOrDefault();
            //    redisList.RemoveValue(value);
            //    iredisClient.Save();
            //}


            // 使用using 报错：
            // using 语句中使用的类型必须可隐式转换为“System.IDisposable”
            // using会自动调用System.IDisposable下的Dispose方法来释放非托管资源， 
            // IRedisTypedClient没有继承System.IDisposable的接口，所以不能用
            IRedisTypedClient<T> iredisClient = Redis.As<T>();
            var redisList = iredisClient.Lists[listId];
            T value = redisList.Where(func).FirstOrDefault();
            redisList.RemoveValue(value);
            iredisClient.Save();
            Redis.Dispose();

        }
        public void test()
        {
            string s1 = Redis.GetClient();
            List<Dictionary<string, string>> s2 = Redis.GetClientsInfo();
            List<string> s3 = Redis.GetAllKeys();
            string s4 = Redis.GetHostString();
            long s5 = Redis.Db;
        }
        #endregion
        //释放资源  
        public void Dispose()
        {
            if (Redis != null)
            {
                Redis.Dispose();
                Redis = null;
            }
            GC.Collect();
        }
    }
}