using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using StackExchange;
using StackExchange.Redis;

namespace RedisStuy
{
    /// <summary>
    /// Redis Database 操作
    /// https://stackexchange.github.io/StackExchange.Redis/
    /// </summary>
    public class RedisDatabaseStudy : IDisposable
    {
        private IDatabase redisDatabase;

        public RedisDatabaseStudy()
        {
            redisDatabase = RedisHelper.GetRedisDatabase();
        }

        public void Dispose()
        {
            
        }
        #region key 操作

        /// <summary>
        /// 删除指定的key, 不存在则忽略
        /// </summary>
        public bool KeyDelete(RedisKey key)
        {
            return redisDatabase.KeyDelete(key);
        }

        /// <summary>
        /// 删除指定的key, 不存在则忽略
        /// </summary>
        public async Task<bool> KeyDeleteAsync(RedisKey key)
        {
            return await redisDatabase.KeyDeleteAsync(key);
        }

        /// <summary>
        /// 序列化指定的key，并返回被序列化的值。
        /// </summary>
        public byte[] KeyDump(RedisKey key)
        {
            return redisDatabase.KeyDump(key);
        }

        /// <summary>
        /// 指定的key,是否存在
        /// </summary>
        public bool KeyExists(RedisKey key)
        {
            return redisDatabase.KeyExists(key);
        }

        /// <summary>
        /// 为给定 key 设置生存时间
        /// </summary>
        public bool KeyExpire(RedisKey key, TimeSpan? expire)
        {
            return redisDatabase.KeyExpire(key, expire);
        }

        /// <summary>
        /// 重命名key
        /// </summary>
        public bool KeyRename(RedisKey sourceKey, RedisKey newKey)
        {
           return redisDatabase.KeyRename(key: sourceKey, newKey: newKey);
        }

        /// <summary>
        /// 迁移key到另外数据库
        /// </summary>
        /// <param name="key">key</param>
        /// <param name="toServer">目标服务器</param>
        /// <param name="toDatabase">目标数据库</param>
        /// <param name="timeoutMilliseconds">操作超时豪秒数</param>
        /// <param name="migrateOptions">迁移选项</param>
        /// <param name="flags">命令标记</param>
        public void KeyMigrate(RedisKey key, System.Net.EndPoint toServer, int toDatabase = 0, int timeoutMilliseconds = 0, MigrateOptions migrateOptions = MigrateOptions.None, CommandFlags flags = CommandFlags.None)
        {
            redisDatabase.KeyMigrate(key, toServer, toDatabase, timeoutMilliseconds, migrateOptions, flags);
        }

        /// <summary>
        /// 移动key到同服务器的另一个数据库
        /// </summary>
        public bool KeyMove(RedisKey key, int databaseIndex)
        {
           return  redisDatabase.KeyMove(key, databaseIndex);
        }

        /// <summary>
        /// 删除键所指定的过期时间
        /// </summary>
        public bool KeyPersist(RedisKey key)
        {
            return redisDatabase.KeyPersist(key);
        }

        /// <summary>
        /// 从当前数据库中随机返回一个key
        /// </summary>
        public RedisKey KeyRandom()
        {
            return redisDatabase.KeyRandom();
        }


        /// <summary>
        /// 反序列化给定的序列化值，并将它和给定的 key 关联
        /// </summary>
        /// <param name="expiry">以毫秒为单位为 key 设置生存时间;为null,不设置生存时间</param>
        /// <returns>
        /// 是否执行成功
        /// </returns>
        public bool KeyRestore(RedisKey key, byte[] value,TimeSpan? expiry,CommandFlags flags)
        {
            bool isSucess = false;
            try
            {
                redisDatabase.KeyRestore(key, value, expiry, flags);
                isSucess = true;
            }
            catch
            {
                isSucess = false;
            }

            return isSucess;
            
        }

        /// <summary>
        /// 获取具有超时的键的剩余生存时间
        /// </summary>
        public TimeSpan? KeyTimeToLive(RedisKey key)
        {
            return redisDatabase.KeyTimeToLive(key);
        }

        /// <summary>
        /// 获取指定key的数据类型
        /// </summary>
        public RedisType KeyType(RedisKey key)
        {
            var redisType = redisDatabase.KeyType(key);
            return redisType;
        }

        #endregion

    }
}