using Microsoft.Extensions.Caching.StackExchangeRedis;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

namespace Znyc.Cloudcar.Admin.Commons.Cache
{
    /// <summary>
    ///     Redis缓存操作
    /// </summary>
    public class RedisCacheService : ICacheService
    {
        /// <summary>
        /// </summary>
        private readonly ConnectionMultiplexer _connection;

        /// <summary>
        /// </summary>
        private readonly string _instance;

        private readonly JsonSerializerOptions _jsonOptions;

        /// <summary>
        /// </summary>
        protected IDatabase _cache;

        /// <summary>
        /// </summary>
        /// <param name="options"></param>
        /// <param name="database"></param>
        /// <param name="jsonOptions"></param>
        public RedisCacheService(RedisCacheOptions options, JsonSerializerOptions jsonOptions, int database = 0)
        {
            _connection = ConnectionMultiplexer.Connect(options.Configuration);
            _cache = _connection.GetDatabase(database);
            _instance = options.InstanceName;
            _jsonOptions = jsonOptions;
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public string GetKeyForRedis(string key)
        {
            return _instance + key;
        }

        public void Dispose()
        {
            if (_connection != null)
            {
                _connection.Dispose();
            }

            GC.SuppressFinalize(this);
        }

        #region 验证缓存项是否存在

        /// <summary>
        ///     验证缓存项是否存在
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <returns></returns>
        public bool Exists(string key)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.KeyExists(GetKeyForRedis(key));
        }

        /// <summary>
        ///     验证缓存项是否存在
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <returns></returns>
        public Task<bool> ExistsAsync(string key)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.KeyExistsAsync(GetKeyForRedis(key));
        }

        #endregion 验证缓存项是否存在

        #region 添加缓存

        /// <summary>
        ///     添加缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <param name="value">缓存Value</param>
        /// <returns></returns>
        public bool Add(string key, object value)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.StringSet(GetKeyForRedis(key),
                Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value, _jsonOptions)));
        }

        /// <summary>
        ///     添加缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <param name="value">缓存Value</param>
        /// <param name="expiresSliding">滑动过期时长（如果在过期时间内有操作，则以当前时间点延长过期时间,Redis中无效）</param>
        /// <param name="expiressAbsoulte">绝对过期时长</param>
        /// <returns></returns>
        public bool Add(string key, object value, TimeSpan expiresSliding, TimeSpan expiressAbsoulte)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.StringSet(GetKeyForRedis(key),
                Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value, _jsonOptions)), expiressAbsoulte);
        }

        /// <summary>
        ///     添加缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <param name="value">缓存Value</param>
        /// <param name="expiresIn">缓存时长</param>
        /// <param name="isSliding">是否滑动过期（如果在过期时间内有操作，则以当前时间点延长过期时间,Redis中无效）</param>
        /// <returns></returns>
        public bool Add(string key, object value, TimeSpan expiresIn, bool isSliding = false)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.StringSet(GetKeyForRedis(key),
                Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value, _jsonOptions)), expiresIn);
        }

        public Task<bool> AddAsync(string key, object value)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.StringSetAsync(GetKeyForRedis(key),
                Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value, _jsonOptions)));
        }

        public Task<bool> AddAsync(string key, object value, TimeSpan expiresSliding, TimeSpan expiressAbsoulte)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.StringSetAsync(GetKeyForRedis(key),
                Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value, _jsonOptions)), expiressAbsoulte);
        }

        public Task<bool> AddAsync(string key, object value, TimeSpan expiresIn, bool isSliding = false)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.StringSetAsync(GetKeyForRedis(key),
                Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value, _jsonOptions)), expiresIn);
        }

        public Task<bool> HashSetAsync(string key, string filed, object value)
        {
            return _cache.HashSetAsync(GetKeyForRedis(key),
                Encoding.UTF8.GetBytes(JsonSerializer.Serialize(filed, _jsonOptions)),
                Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value, _jsonOptions)));
        }

        #endregion 添加缓存

        #region 删除缓存

        /// <summary>
        ///     删除缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <returns></returns>
        public bool Remove(string key)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.KeyDelete(GetKeyForRedis(key));
        }

        /// <summary>
        ///     批量删除缓存
        /// </summary>
        /// <param name="key">缓存Key集合</param>
        /// <returns></returns>
        public void RemoveAll(IEnumerable<string> keys)
        {
            if (keys == null)
            {
                throw new ArgumentNullException(nameof(keys));
            }

            keys.ToList().ForEach(item => Remove(item));
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public Task<bool> RemoveAsync(string key)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            return _cache.KeyDeleteAsync(GetKeyForRedis(key));
        }

        public Task RemoveAllAsync(IEnumerable<int> keys)
        {
            //if (keys == null)
            //{
            throw new ArgumentNullException(nameof(keys));
            //}

            //keys.ToList().ForEach(item => RemoveAsync(item));
        }

        /// <summary>
        ///     使用通配符找出所有的key然后逐个删除
        /// </summary>
        /// <param name="pattern">通配符</param>
        public virtual void RemoveByPattern(string pattern)
        {
            foreach (System.Net.EndPoint ep in _connection.GetEndPoints())
            {
                IServer server = _connection.GetServer(ep);
                IEnumerable<RedisKey> keys = server.Keys(pattern: "*" + pattern + "*", database: _cache.Database);
                foreach (RedisKey key in keys)
                {
                    _cache.KeyDelete(key);
                }
            }
        }

        /// <summary>
        ///     删除所有缓存
        /// </summary>
        public void RemoveCacheAll()
        {
            RemoveByPattern("");
        }

        #endregion 删除缓存

        #region 获取缓存

        /// <summary>
        ///     获取缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <returns></returns>
        public T Get<T>(string key) where T : class
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            RedisValue value = _cache.StringGet(GetKeyForRedis(key));

            if (!value.HasValue)
            {
                return default;
            }

            return JsonSerializer.Deserialize<T>(value, _jsonOptions);
        }

        /// <summary>
        ///     获取缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <returns></returns>
        public object Get(string key)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            RedisValue value = _cache.StringGet(GetKeyForRedis(key));

            if (!value.HasValue)
            {
                return null;
            }

            return JsonSerializer.Deserialize<object>(value, _jsonOptions);
            //string json = value.ToString();
            //return Newtonsoft.Json.JsonConvert.DeserializeObject(json);
        }

        /// <summary>
        ///     获取缓存集合
        /// </summary>
        /// <param name="keys">缓存Key集合</param>
        /// <returns></returns>
        public IDictionary<string, object> GetAll(IEnumerable<string> keys)
        {
            if (keys == null)
            {
                throw new ArgumentNullException(nameof(keys));
            }

            Dictionary<string, object> dict = new Dictionary<string, object>();

            keys.ToList().ForEach(item => dict.Add(item, Get(GetKeyForRedis(item))));

            return dict;
        }

        public Task<T> GetAsync<T>(string key) where T : class
        {
            throw new NotImplementedException();
        }

        public Task<object> GetAsync(string key)
        {
            throw new NotImplementedException();
        }

        public Task<IDictionary<string, object>> GetAllAsync(IEnumerable<int> keys)
        {
            throw new ArgumentNullException(nameof(keys));
        }

        #endregion 获取缓存

        #region 修改缓存

        /// <summary>
        ///     修改缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <param name="value">新的缓存Value</param>
        /// <returns></returns>
        public bool Replace(string key, object value)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            if (Exists(key))
            {
                if (!Remove(key))
                {
                    return false;
                }
            }

            return Add(key, value);
        }

        /// <summary>
        ///     修改缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <param name="value">新的缓存Value</param>
        /// <param name="expiresSliding">滑动过期时长（如果在过期时间内有操作，则以当前时间点延长过期时间）</param>
        /// <param name="expiressAbsoulte">绝对过期时长</param>
        /// <returns></returns>
        public bool Replace(string key, object value, TimeSpan expiresSliding, TimeSpan expiressAbsoulte)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            if (Exists(key))
            {
                if (!Remove(key))
                {
                    return false;
                }
            }

            return Add(key, value, expiresSliding, expiressAbsoulte);
        }

        /// <summary>
        ///     修改缓存
        /// </summary>
        /// <param name="key">缓存Key</param>
        /// <param name="value">新的缓存Value</param>
        /// <param name="expiresIn">缓存时长</param>
        /// <param name="isSliding">是否滑动过期（如果在过期时间内有操作，则以当前时间点延长过期时间）</param>
        /// <returns></returns>
        public bool Replace(string key, object value, TimeSpan expiresIn, bool isSliding = false)
        {
            if (key == null)
            {
                throw new ArgumentNullException(nameof(key));
            }

            if (Exists(key))
            {
                if (!Remove(key))
                {
                    return false;
                }
            }

            return Add(key, value, expiresIn, isSliding);
        }

        public Task<bool> ReplaceAsync(string key, object value)
        {
            throw new NotImplementedException();
        }

        public Task<bool> ReplaceAsync(string key, object value, TimeSpan expiresSliding, TimeSpan expiressAbsoulte)
        {
            throw new NotImplementedException();
        }

        public Task<bool> ReplaceAsync(string key, object value, TimeSpan expiresIn, bool isSliding = false)
        {
            throw new NotImplementedException();
        }

        #endregion 修改缓存

        #region Hash

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public bool HSet(string key, string filed, object value)
        {
            return RedisHelper.HSet(key, filed, value);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public Task<bool> HSetAsync(string key, string filed, object value)
        {
            return RedisHelper.HSetAsync(key, filed, value);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public Task<bool> HMSetAsync(string key, object[] value)
        {
            return RedisHelper.HMSetAsync(key, value);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public bool HMSet(string key, object[] value)
        {
            return RedisHelper.HMSet(key, value);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public string[] HMGet(string key, string[] filed)
        {
            return RedisHelper.HMGet(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public Task<string[]> HMGetAsync(string key, string filed)
        {
            return RedisHelper.HMGetAsync(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public long HDel(string key, string[] filed)
        {
            return RedisHelper.HDel(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public Task<long> HDelAsync(string key, string filed)
        {
            return RedisHelper.HDelAsync(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public bool HExists(string key, string filed)
        {
            return RedisHelper.HExists(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public Task<bool> HExistsAsync(string key, string filed)
        {
            return RedisHelper.HExistsAsync(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public Task<long> HIncrByAsync(string key, string filed)
        {
            return RedisHelper.HIncrByAsync(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public long HIncrBy(string key, string filed)
        {
            return RedisHelper.HIncrBy(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public Task<Dictionary<string, string>> HGetAllAsync(string key)
        {
            return RedisHelper.HGetAllAsync(key);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public Dictionary<string, string> HGetAll(string key)
        {
            return RedisHelper.HGetAll(key);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <returns></returns>
        public async Task<string> HGetAsync(string key, string filed)
        {
            return await RedisHelper.HGetAsync(key, filed);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public Task<bool> HSetNxAsync(string key, string filed, object value)
        {
            return RedisHelper.HSetNxAsync(key, filed, value);
        }

        /// <summary>
        /// </summary>
        /// <param name="key"></param>
        /// <param name="filed"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public bool HSetNx(string key, string filed, object value)
        {
            return RedisHelper.HSetNx(key, filed, value);
        }

        #endregion Hash
    }
}