/*
 作用: redis操作类
 时间: 2023.06.09
 作者: evangeyu
 说明:
    导出所有redis相关操作

 使用约束：
    1. 不允许大key,key命名包含唯一id： 数据库功能:类型:唯一id1 : 唯一id2:.... = 数据 如：AccountInfo:string:accountType:accountType = "xxx"
    2. key禁止包含特殊字符，如空格、换行、单双引号以及其他转义字符
    3. 如果是String类型，单个value大小控制10k以内
    4. hash、list、set、zset类型，元素个数一般不超过5000
 */


using System;
using StackExchange.Redis;
using Newtonsoft.Json;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Sog
{
    public class RedisDB
    {
        private string m_dbName;
        private string m_ip;
        private static ConfigurationOptions m_connectConfig = null;
        private static ConnectionMultiplexer m_redisConn = null;
        private IDatabase m_redisDB
        {
            get
            {
                return m_redisConn.GetDatabase();
            }
        }

        public RedisDB(string dbname, string ip, string password)
        {
            m_ip = ip;
            m_dbName = dbname;

            m_connectConfig = ConfigurationOptions.Parse(string.Format("{0},password={1}", ip, password));
            m_connectConfig.CommandMap = CommandMap.Create(new HashSet<string> { "SUBSCRIBE" }, false); // 禁用订阅功能

            try
            {
                m_redisConn = ConnectionMultiplexer.Connect(m_connectConfig);
                RegisterEvent();
            }
            catch (Exception ex)
            {
                TraceLog.Error("connect redis ip {0} error!", m_ip);
                TraceLog.Exception(ex);

                TraceLog.Error("Inner exception:");
                TraceLog.Exception(ex.InnerException);
            }
        }

        public void Dispose()
        {
            if (m_redisConn != null)
            {
                m_redisConn.Close(true);
                m_redisConn.Dispose();
                m_redisConn = null;
            }
        }

        public TimeSpan Ping()
        {
            return m_redisDB.Ping();
        }

        public string CreateKey(string name, params string[] ids)
        {
            if (ids == null)
            {
                return string.Format("{0}:{1}", m_dbName, name);;
            }

            return string.Format("{0}:{1}:{2}", m_dbName, name, string.Join(":", ids));
        }


        //----------------------------------------- 序列化

        public static string ConvertToStr<T>(T value)
        {
            return value is string ? value.ToString() : JsonConvert.SerializeObject(value);
        }

        public static T ConvertToObj<T>(string value)
        {
            if (string.IsNullOrEmpty(value))
            {
                return default(T);
            }
            else
            {
                return JsonConvert.DeserializeObject<T>(value);
            }
        }

        private static List<T> ConvetList<T>(RedisValue[] values)
        {
            List<T> result = new List<T>();
            foreach (var item in values)
            {
                var model = ConvertToObj<T>(item);
                if (model != null)
                    result.Add(model);
            }
            return result;
        }


        //----------------------------------------- String

        public bool StringSet<T>(string redisKey, T obj)
        {
            return m_redisDB.StringSet(redisKey, ConvertToStr(obj));
        }

        public T StringGet<T>(string redisKey)
        {
            return ConvertToObj<T>(m_redisDB.StringGet(redisKey));
        }

        public long StringIncrement(string redisKey)
        {
            return m_redisDB.StringIncrement(redisKey);
        }

        public async Task<bool> StringSetAsync<T>(string redisKey, T obj)
        {
            return await m_redisDB.StringSetAsync(redisKey, ConvertToStr(obj));
        }
        public async Task<T> StringGetAsync<T>(string redisKey)
        {
            return ConvertToObj<T>(await m_redisDB.StringGetAsync(redisKey));
        }

        //----------------------------------------- Hash

        public void HashSetPart(string redisKey, IEnumerable<HashEntry> hashFields)
        {
            m_redisDB.HashSet(redisKey, hashFields.ToArray());
        }

        public RedisValue[] HashGetPart(string redisKey, RedisValue[] hashField)
        {
            return m_redisDB.HashGet(redisKey, hashField);
        }

        public bool HashSet<T>(string redisKey, string hashField, T value)
        {
            return m_redisDB.HashSet(redisKey, hashField, ConvertToStr(value));
        }

        public T HashGet<T>(string redisKey, string hashField)
        {
            return ConvertToObj<T>(m_redisDB.HashGet(redisKey, hashField));
        }

        public HashEntry[] HashGetAll(string redisKey)
        {
            return m_redisDB.HashGetAll(redisKey);
        }

        public async Task<T> HashGetAsync<T>(string redisKey, string hashField)
        {
            return ConvertToObj<T>(await m_redisDB.HashGetAsync(redisKey, hashField));
        }
        public async Task<bool> HashSetAsync<T>(string redisKey, string hashField, T value)
        {
            return await m_redisDB.HashSetAsync(redisKey, hashField, ConvertToStr(value));
        }


        //----------------------------------------- List

        public string ListLeftPop(string redisKey)
        {
            return m_redisDB.ListLeftPop(redisKey);
        }

        public string ListRightPop(string redisKey)
        {
            return m_redisDB.ListRightPop(redisKey);
        }

        public long ListRemove(string redisKey, string redisValue, long count = 0)
        {
            return m_redisDB.ListRemove(redisKey, redisValue, count);
        }

        public void ListTrim(string redisKey, long start, long stop)
        {
            m_redisDB.ListTrim(redisKey, start, stop);
        }

        public void ListMaxLen(string redisKey, long maxLen)
        {
            ListTrim(redisKey, 0, maxLen > 0 ? (maxLen - 1) : -1);
        }

        public long ListRightPush(string redisKey, string redisValue)
        {
            return m_redisDB.ListRightPush(redisKey, redisValue);
        }

        public long ListLeftPush(string redisKey, string redisValue)
        {
            return m_redisDB.ListLeftPush(redisKey, redisValue);
        }

        public long ListLength(string redisKey)
        {
            return m_redisDB.ListLength(redisKey);
        }

        public IEnumerable<RedisValue> ListRange(string redisKey, int startRow=0, int endRow=-1)
        {
            return m_redisDB.ListRange(redisKey, startRow, endRow);
        }

        public long ListRightPush<T>(string redisKey, T value)
        {
            return m_redisDB.ListRightPush(redisKey, ConvertToStr(value));
        }

        public long ListLeftPush<T>(string redisKey, T value)
        {
            return m_redisDB.ListLeftPush(redisKey, ConvertToStr(value));
        }

        public List<T> ListRange<T>(string redisKey, int startRow=0, int endRow=-1)
        {
            return ConvetList<T>(ListRange(redisKey, startRow, endRow).ToArray());
        }


        //----------------------------------------- Set

        public bool SetAdd(string redisKey, string member)
        {
            return m_redisDB.SetAdd(redisKey, member);
        }

        public long SetAdd(string redisKey, RedisValue[] members)
        {
            return m_redisDB.SetAdd(redisKey, members);
        }

        public long SetLength(string redisKey)
        {
            return m_redisDB.SetLength(redisKey);
        }

        public bool SetRemove(string redisKey, string memebr)
        {
            return m_redisDB.SetRemove(redisKey, memebr);
        }

        public bool SetAdd<T>(string redisKey, T member)
        {
            return m_redisDB.SetAdd(redisKey, ConvertToStr(member));
        }

        public RedisValue[] SetMembers(string redisKey)
        {
            return m_redisDB.SetMembers(redisKey);
        }


        //----------------------------------------- SortedSet

        public bool ZSetAdd(string redisKey, string member, double score)
        {
            return m_redisDB.SortedSetAdd(redisKey, member, score);
        }

        public IEnumerable<RedisValue> ZSetRangeByRank(string redisKey)
        {
            return m_redisDB.SortedSetRangeByRank(redisKey);
        }

        public long ZSetLength(string redisKey)
        {
            return m_redisDB.SortedSetLength(redisKey);
        }

        public bool ZSetRemove(string redisKey, string memebr)
        {
            return m_redisDB.SortedSetRemove(redisKey, memebr);
        }

        public bool ZSetAdd<T>(string redisKey, T member, double score)
        {
            return m_redisDB.SortedSetAdd(redisKey, ConvertToStr(member), score);
        }

        public IEnumerable<SortedSetEntry> ZSetScan(string redisKey, string pattern, int pageSize = 250, long cursor = 0, int pageOffset = 0)
        {
            return m_redisDB.SortedSetScan(redisKey, pattern, pageSize, cursor, pageOffset);
        }


        //----------------------------------------- 操作key

        public bool KeyDelete(string redisKey)
        {
            return m_redisDB.KeyDelete(redisKey);
        }

        public long KeyDelete(IEnumerable<string> redisKeys)
        {
            var keys = redisKeys.Select(x => (RedisKey)x);
            return m_redisDB.KeyDelete(keys.ToArray());
        }

        public bool KeyExists(string redisKey)
        {
            return m_redisDB.KeyExists(redisKey);
        }

        public bool KeyRename(string redisKey, string redisNewKey)
        {
            return m_redisDB.KeyRename(redisKey, redisNewKey);
        }

        public bool KeyExpire(string redisKey, TimeSpan? expiry)
        {
            return m_redisDB.KeyExpire(redisKey, expiry);
        }


        //----------------------------------------- keys scan

        // 注意：这个底层可能使用了keys 和 scan两种命令
        // pattern : 支持通配符 （*:任意字符；?:单个任意字符；[ab]:指定范围内的字符）
        public IEnumerable<RedisKey> Keys(RedisValue _pattern = default)
        {
            var server = m_redisConn.GetServer(m_ip);
            return server.Keys(pattern: _pattern);
        }

        // pattern : 支持通配符 （*:任意字符；?:单个任意字符；[ab]:指定范围内的字符）
        public long Scan(ref IEnumerable<RedisKey> result, string _pattern, long cursor = 0, int count = 100)
        {
            var redisResults = (RedisResult[])m_redisDB.Execute("scan", cursor, "MATCH", _pattern, "COUNT", count);
            result = (RedisKey[])redisResults[1];
            return (long)redisResults[0];
        }

        //----------------------------------------- pipleline 批处理

        public IBatch CreateBatch()
        {
            return m_redisDB.CreateBatch();
        }
        

        //----------------------------------------- redis相关事件

        private static void RegisterEvent()
        {
            m_redisConn.ConfigurationChangedBroadcast += OnConfigurationChangedBroadcast;
            m_redisConn.HashSlotMoved += OnHashSlotMoved;
            m_redisConn.ConfigurationChanged += OnConfigurationChanged;
            m_redisConn.ConnectionRestored += OnConnectionRestored;
            m_redisConn.ConnectionFailed += OnConnectionFailed;

            m_redisConn.ErrorMessage += OnErrorMessage;
            m_redisConn.InternalError += OnInternalError;
        }

        // 重新配置广播-主从同步更改
        private static void OnConfigurationChangedBroadcast(object sender, EndPointEventArgs e)
        {
            TraceLog.Trace($"{nameof(OnConfigurationChangedBroadcast)}: {e.EndPoint}");
        }


        // 更改集群
        private static void OnHashSlotMoved(object sender, HashSlotMovedEventArgs e)
        {
            TraceLog.Error(
                $"{nameof(OnHashSlotMoved)}: {nameof(e.OldEndPoint)}-{e.OldEndPoint} To {nameof(e.NewEndPoint)}-{e.NewEndPoint}, ");
        }

        // 更改配置
        private static void OnConfigurationChanged(object sender, EndPointEventArgs e)
        {
            TraceLog.Error($"{nameof(OnConfigurationChanged)}: {e.EndPoint}");
        }

        // 连接失败
        private static void OnConnectionFailed(object sender, ConnectionFailedEventArgs e)
        {
            TraceLog.Error($"{nameof(OnConnectionFailed)}: {e.Exception}");
        }

        // 重新连接
        private static void OnConnectionRestored(object sender, ConnectionFailedEventArgs e)
        {
            TraceLog.Error($"{nameof(OnConnectionRestored)}: {e.Exception}");
        }

        // 发生错误
        private static void OnErrorMessage(object sender, RedisErrorEventArgs e)
        {
            TraceLog.Error($"{nameof(OnErrorMessage)}: {e.Message}");
        }
        // 内部错误
        private static void OnInternalError(object sender, InternalErrorEventArgs e)
        {
            TraceLog.Error($"{nameof(OnInternalError)}: {e.Exception}");
        }

    }

}