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


using Amazon.OpenSearchService.Model.Internal.MarshallTransformations;
using Microsoft.IdentityModel.Tokens;
using ServerControlCenter;
using StackExchange.Redis;


using ServerCore;
using ServerBase;


namespace ServerCommon;


public class FriendInterlockCacheRequest : RedisRequestPrivateBase
{
    string m_guid = string.Empty;
    string m_friend_guid = string.Empty;


    public FriendInterlockCacheRequest(UserBase owner, RedisConnector redisConnector, string userGuid, string friendGuid)
        : base(owner, redisConnector)
    {
        m_guid = userGuid;
        m_friend_guid = friendGuid;
    }

    protected override string onMakeKey()
    {
        return $"friendrequestaction:{getSuffix()}";
    }

    public async Task<Result> getLock()
    {
        var key = onMakeKey();
        var database = getDatabase();

        var result = new Result();
        string err_msg;

        try
        {
            if (false == await database.SortedSetAddAsync(key, m_guid, DateTimeOffset.Now.ToUnixTimeMilliseconds()))
            {
                err_msg = $"Failed to add FriendCache from Redis !!! : key : {key}, guid : {m_guid}";
                //result.setFail(ServerErrorCode.TryCatchException, err_msg);
                Log.getLogger().warn(err_msg);
                //return result;
            }
            else
            {
                Log.getLogger().debug($"Success to add FriendCache from Redis !!! : key : {key}, guid : {m_guid}");
            }
            if (false == await database.KeyExpireAsync(key, TimeSpan.FromMilliseconds(10000)))
            {
                err_msg = $"Failed to set expire FriendCache from Redis !!! : key : {key}, guid : {m_guid}";
                result.setFail(ServerErrorCode.TryCatchException, err_msg);
                Log.getLogger().error(err_msg);
                return result;
            }

            Int32 retry_cnt = 3;
            Int32 millisecondTimeout = 100;
            for (Int32 i = 0; i < retry_cnt; i++)
            {
                var values = await database.SortedSetRangeByRankAsync(key, 0, 0, Order.Ascending, CommandFlags.PreferMaster);
                if (false == values[0].HasValue)
                {
                    Log.getLogger().warn($"Not Exist Value m_guid : {m_guid}, m_friend_guid : {m_friend_guid}");
                    System.Threading.Thread.Sleep(millisecondTimeout);
                    continue;
                }

                if (true == values[0].Equals(m_guid))
                {
                    return result;
                    
                }
                else 
                {
                    Log.getLogger().warn($"Not Exist Value m_guid : {m_guid}, m_friend_guid : {m_friend_guid}, values[0] : {values[0]}");
                    System.Threading.Thread.Sleep(millisecondTimeout);
                    continue;
                }
            }
        }
        catch (Exception e)
        {
            err_msg = $"Failed to get FriendCache from Redis !!! : : errMsg:{e.Message} - {getOwner().toBasicString()}";
            result.setFail(ServerErrorCode.TryCatchException, err_msg);
            Log.getLogger().error(err_msg);
            return result;
        }

        err_msg = $"Failed to get First Data from Redis !!! : - {getOwner().toBasicString()}";
        result.setFail(ServerErrorCode.FriendInfoNotExist, err_msg);
        return result;
    }

    public async Task<Result> removeFirstCache()
    {
        string key = onMakeKey();
        var database = getDatabase();

        var result = new Result();
        string err_msg = string.Empty;

        try
        {
            bool ret = await database.SortedSetRemoveAsync(key, m_guid);
            if (!ret)
            {
                err_msg = $"Failed to remove First Data from Redis !!! : - {getOwner().toBasicString()}";
                result.setFail(ServerErrorCode.ServerLogicError, err_msg);
                Log.getLogger().error(err_msg);
                return result;
            }
        }
        catch (Exception e)
        {
            err_msg = $"Failed to get FriendCache from Redis !!! : : errMsg:{e.Message} - {getOwner().toBasicString()}";
            result.setFail(ServerErrorCode.TryCatchException, err_msg);
            Log.getLogger().error(err_msg);
            return result;
        }

        return result;
    }

    public override string toBasicString()
    {
        return string.Empty;
    }

    private string getSuffix()
    {
        string[] strings = new string[2];
        strings[0] = m_guid;
        strings[1] = m_friend_guid;
        Array.Sort(strings);
        string suffix = strings[0] + strings[1];
        return suffix;
    }
}