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

namespace TEAMModelOS.SDK.Module.Cache
{
    public class CSRedisCacheService :ICacheService//,IDisposable
    {
        protected IDistributedCache _cache;

        public CSRedisCacheService(IDistributedCache cache  )
        {
            _cache = cache;
        }

    
     /// <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  RedisHelper.Instance.Exists(key);
          //  return _cache.KeyExists(GetKeyForRedis(key));
    }/// <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));
        }
         _cache.Set(key, Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value)));
        return Exists(key);
    }
    /// <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));
        }
             _cache.Set(key, Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value)), new DistributedCacheEntryOptions() { AbsoluteExpirationRelativeToNow=expiressAbsoulte,SlidingExpiration=expiresSliding});
            return Exists(key);
        }
    /// <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));
        }
            _cache.Set(key, Encoding.UTF8.GetBytes(JsonSerializer.Serialize(value)), new DistributedCacheEntryOptions() { SlidingExpiration = expiresIn });
            return Exists(key);
          //  return _cache.StringSet(GetKeyForRedis(key), Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(value)), expiresIn);
    }/// <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));
        }
         _cache.Remove(key);
        return !Exists(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>
    /// 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));
        }

        var value = _cache.GetString(key);

        if ( string.IsNullOrEmpty(value))
        {
            return default(T);
        }

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

    /// <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));
        }

        var value = _cache.GetString(key);

        if (string.IsNullOrEmpty(value))
        {
            return null;
        }
        return JsonSerializer.Deserialize<object>(value);
    }   /// <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));
        }
        var dict = new Dictionary<string, object>();

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

        return dict;
    }

    /// <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 void Dispose()
    //{
    //    if (_connection != null)
    //        _connection.Dispose();
    //    GC.SuppressFinalize(this);
    //}


    public async Task<bool> ExistsAsync(string key)
    {
        return await Task.Run(() => Exists(key));
    }

    public async Task<bool> AddAsync(string key, object value)
    {
        return await Task.Run(() => Add(key, value));
    }

    public async Task<bool> AddAsync(string key, object value, TimeSpan expiresSliding, TimeSpan expiressAbsoulte)
    {
        return await Task.Run(() => Add(key, value, expiresSliding, expiressAbsoulte));
    }

    public async Task<bool> AddAsync(string key, object value, TimeSpan expiresIn, bool isSliding = false)
    {
        return await Task.Run(() => Add(key, value, expiresIn, isSliding));
    }

    public async Task<bool> RemoveAsync(string key)
    {
        return await Task.Run(() => Remove(key));
    }

    public async Task RemoveAllAsync(IEnumerable<string> keys)
    {
        await Task.Run(() => RemoveAll(keys));
    }

    public async Task<T> GetAsync<T>(string key) where T : class
    {
        return await Task.Run(() => Get<T>(key));
    }

    public async Task<object> GetAsync(string key)
    {
        return await Task.Run(() => Get(key));
    }

    public async Task<IDictionary<string, object>> GetAllAsync(IEnumerable<string> keys)
    {
        return await Task.Run(() => GetAll(keys));
    }

    public async Task<bool> ReplaceAsync(string key, object value)
    {
        return await Task.Run(() => Replace(key, value));
    }

    public async Task<bool> ReplaceAsync(string key, object value, TimeSpan expiresSliding, TimeSpan expiressAbsoulte)
    {
        return await Task.Run(() => Replace(key, value, expiresSliding, expiressAbsoulte));
    }

    public async Task<bool> ReplaceAsync(string key, object value, TimeSpan expiresIn, bool isSliding = false)
    {
        return await Task.Run(() => Replace(key, value, expiresIn, isSliding));
    }
}
}