using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;
using StackExchange.Redis;

namespace IoTIntegrationPlatform.Common
{
    /// <summary>
    /// redis 帮助类
    /// </summary>
    public class RedisHelper
    {
        private ConnectionMultiplexer redis;

        private static string redisConnectStr = string.Empty;

        /// <summary>
        ///
        /// </summary>
        /// <param name="conn"></param>
        public static void SetRedisConnection(string conn)
        {
            redisConnectStr = conn;
        }


        private static RedisHelper _Instance;

        /// <summary>
        /// redis单例
        /// </summary>
        public static RedisHelper Instance
        {
            get
            {
                lock (redisConnectStr)
                {
                    if (_Instance == null)
                    {
                        if (string.IsNullOrWhiteSpace(redisConnectStr))
                        {
                            Logging.Warn("redisConnectStr 未配置");
                        }
                        _Instance = new RedisHelper
                        {
                            redis = ConnectionMultiplexer.Connect(redisConnectStr)
                        };
                    }

                    return _Instance;
                }
            }
        }

        public bool Remove(string key)
        {
            IDatabase db = redis.GetDatabase();
            return db.KeyDelete(key);
        }

        #region string

        /// <summary>
        /// 保存字符串
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <param name="TimeSpanSeconds"></param>
        /// <returns></returns>
        public bool StringSet(string key, string value, int TimeSpanSeconds = 0)
        {
            IDatabase db = redis.GetDatabase();
            if (TimeSpanSeconds > 0)
            {
                return db.StringSet(key, value, TimeSpan.FromSeconds(TimeSpanSeconds));
            }
            return db.StringSet(key, value);
        }

        public bool StringSet(string key, string value, TimeSpan? timeSpan)
        {
            IDatabase db = redis.GetDatabase();
            if (timeSpan != null)
            {
                return db.StringSet(key, value, timeSpan);
            }
            return db.StringSet(key, value);
        }

        /// <summary>
        /// 保存实体字符串
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public bool StringSet<T>(string key, T value, int TimeSpanSeconds = 0)
        {
            IDatabase db = redis.GetDatabase();
            if (TimeSpanSeconds > 0)
            {
                return db.StringSet(key, JsonConvert.SerializeObject(value), TimeSpan.FromSeconds(TimeSpanSeconds));
            }
            return db.StringSet(key, JsonConvert.SerializeObject(value));
        }

        /// <summary>
        /// 获取字符串
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public string StringGet(string key)
        {
            IDatabase db = redis.GetDatabase();
            return db.StringGet(key);
        }

        /// <summary>
        /// 获取实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public T StringGet<T>(string key, int TimeSpanSeconds = 0)
        {
            string result = StringGet(key);
            if (!string.IsNullOrWhiteSpace(result))
            {
                if (TimeSpanSeconds > 0)
                {
                    StringSet(key, result, TimeSpanSeconds);
                }
                return JsonConvert.DeserializeObject<T>(result);
            }
            return default;
        }

        #endregion string

        #region List

        public long ListRightPush(string key, string value)
        {
            IDatabase db = redis.GetDatabase();
            return db.ListRightPush(key, value);
        }

        public string ListLeftPop(string key)
        {
            IDatabase db = redis.GetDatabase();
            return db.ListLeftPop(key);
        }

        public static List<T> GetList<T>(string key)
        {
            List<T> taskList = new List<T>();
            //获取redis保存数据
            var redisList = RedisHelper.Instance.StringGet(key);
            if (!string.IsNullOrEmpty(redisList))
            {
                taskList = JsonTools.JsonToT<List<T>>(redisList);
            }
            return taskList;
        }

        #endregion List

        
    }
}