using Google.Protobuf;
using Google.Protobuf.WellKnownTypes;
using Newtonsoft.Json;


using ServerCore;
using ServerBase;
using ServerCommon;
using ServerCommon.BusinessLogDomain;
using MetaAssets;


using static ClientToGameReq.Types;
using static ClientToGameRes.Types;


namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.C2GS_REQ_LEAVE_BATTLE_INSTANCE), typeof(LeaveBattleInstancePacketHandler), typeof(GameLoginListener))]
public class LeaveBattleInstancePacketHandler : PacketRecvHandler
{
    public override async Task<Result> onProcessPacket(ISession entityWithSession, Google.Protobuf.IMessage recvMessage)
    {
        var result = new Result();
        var err_msg = string.Empty;
        
        var server_logic = GameServerApp.getServerLogic();
        var server_config = server_logic.getServerConfig();
        bool is_battle_system_active = server_config.BattleSystemEnable;

        var player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(player, () => $"entity_player is null !!!");
        
        //앞단에 넣으면 좋겠지만... 일단 여기에..
        if (false == is_battle_system_active)
        {
            err_msg = $"is_battle_system_active is false!!!";
            result.setFail(ServerErrorCode.BattleInstanceInActive, err_msg);
            Log.getLogger().error(err_msg);
            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }
        
        var req_msg = recvMessage as ClientToGame;
        ArgumentNullReferenceCheckHelper.throwIfNull(req_msg, () => $"req_msg is null !!! - {player.toBasicString()}");

        var request = req_msg.Request.ReqLeaveBattleInstance;
        if (null == request)
        {
            err_msg = $"failed to get request message : Invalid Request message - {req_msg.Request.MsgCase}";
            Log.getLogger().error(err_msg);
            result.setFail(ServerErrorCode.InvalidArgument, err_msg);
            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }
        
        var packet_create_time = request.PacketCreateTime;
        if (packet_create_time is not null)
        {
            Log.getLogger().info($"Leave Battle Instance packet received, packetCreateTime : {packet_create_time}, player : {player.toBasicString()}");
        }
        
        
        var attribute = player.getEntityAttribute<LocationAttribute>();
        NullReferenceCheckHelper.throwIfNull(attribute, () => $"LocationAttribute is null !!! - player:{player.toBasicString()}");

        if (false == MetaData.Instance._IndunTable.TryGetValue(attribute.CurrentIndunLocation.InstanceMetaId, out var prev_indun_data) || null == prev_indun_data)
        {
            err_msg = $"failed to get indun data !!! - {player.toBasicString()}";
            result.setFail(ServerErrorCode.NotFoundIndunData, err_msg);
            Log.getLogger().error(err_msg);
            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        List<ILogInvoker> invokers = new();
        var departure_position_info = player.getCurrentPositionInfo();
        var departure_position_log_info = PositionBusinessLogHelper.toPositionLogInfo(PositionMoveType.Departure, departure_position_info);
        var departure_position_business_log = new PositionBusinessLog(departure_position_log_info);
        invokers.Add(departure_position_business_log);
        

        // 1. 이동할 서버 조회
        var channel_server_name = attribute.LastestChannelServerLocation.ServerName;
        var world_meta_id = attribute.LastestChannelServerLocation.WorldMetaId;

        var move_server_info = await server_logic.getReturnToServerInfo(channel_server_name, ServerType.Channel, player, (ushort)world_meta_id);
        if (null == move_server_info)
        {
            err_msg = $"Failed to get balanced GameServer !!! - {player.toBasicString()}";
            result.setFail(ServerErrorCode.NoServerConnectable, err_msg);
            Log.getLogger().error(err_msg);
            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        // 2. 이동 예약 요청
        var message = new ServerMessage.Types.GS2GS_REQ_RESERVATION_ENTER_TO_SERVER();
        message.MoveType = ServerMoveType.Force;
        message.RequestUserGuid = player.getUserGuid();
        message.RequestServerName = GameServerApp.getServerLogic().getServerName();

        var reserved = await server_logic.getReservationManager().registerReservationEnterToServer(message, move_server_info.Name);

        // 예약 실패 체크
        if (null == reserved)
        {
            err_msg = $"Failed to reservation enter to game server!!! - {nameof(LeaveInstancePacketHandler)}";
            Log.getLogger().error(err_msg);
            result.setFail(ServerErrorCode.FailedToReservationEnter, err_msg);
            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        // 4. instance room 떠나기
        result = await player.runTransactionRunnerSafely(TransactionIdType.PrivateContents, "LeaveBattleInstance", leaveBattleInstanceDelegate);
        if (result.isFail())
        {
            err_msg = $"Failed to runTransactionRunner() !!! : {result.toBasicString()} - {player.toBasicString()}";
            Log.getLogger().error(err_msg);
            return result;
        }

        // if (prev_is_in_concert && prev_indun_data is not null)
        // {
        //     await QuestManager.It.QuestCheck(entity_player, new QuestConcert(EQuestEventTargetType.CONCERT, EQuestEventNameType.ENDED, prev_indun_data.MapId));
        // }


        return result;
        
        async Task<Result> leaveBattleInstanceDelegate() => await leaveBattleInstanceAsync(player, move_server_info, prev_indun_data, invokers);
    }

    
    public async Task<Result> leaveBattleInstanceAsync(Player player, ServerInfo server_info, InstanceMetaData prevIndunData, List<ILogInvoker> invokers)
    {
        var server_logic = GameServerApp.getServerLogic();
        
        var battle_zone_move_action = player.getEntityAction<GameZoneMoveAction>();
        NullReferenceCheckHelper.throwIfNull(battle_zone_move_action, () => $"game_zone_action is null !!! - {player.toBasicString()}");
        
        var result = new Result();
        string err_msg;

        // 1. leave battle room
        (result, _) = await battle_zone_move_action.tryLeaveBattleInstanceRoom();
        if (result.isFail())
        {
            err_msg = $"Failed to tryLeaveInstance() !!! : {result.toBasicString()} - {player.toBasicString()}";
            Log.getLogger().error(err_msg);

            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        var location_action = player.getEntityAction<LocationAction>();
        var current_indun_location = location_action.getCurrentLocation() as IndunLocation;
        NullReferenceCheckHelper.throwIfNull(current_indun_location, () => $"current_indun_location is null !!! - {player.toBasicString()}");

        var instance_room_Id = current_indun_location.InstanceRoomId;
        if (instance_room_Id == string.Empty)
        {
            err_msg = $"tryLeaveBattelInstance instance_room_Id is Empty player : {player.toBasicString()}";
            result.setFail(ServerErrorCode.BattleInstanceInfoNotExist, err_msg);
            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        var battle_instance_room = BattleInstanceManager.It.getBattleInstanceRoom(instance_room_Id);
        if (battle_instance_room is null)
        {
            err_msg = $"battle_instance_room not esist instance_room_Id : {instance_room_Id}, player : {player.toBasicString()}";
            result.setFail(ServerErrorCode.BattleInstanceInfoNotExist, err_msg);
            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        var battle_instance_room_attribute = battle_instance_room.getEntityAttribute<BattleInstanceSnapshotAttribute>();
        NullReferenceCheckHelper.throwIfNull(battle_instance_room_attribute, () => $"battle_instance_room_attribute is null !!! - {player.toBasicString()}");

        // 2. move to channel
        result = await location_action.tryMoveToChannel();
        if (result.isFail())
        {
            err_msg = $"Fail to tryMoveToIndun";
            Log.getLogger().error(err_msg);

            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        var buff_action = player.getEntityAction<BuffAction>();
        NullReferenceCheckHelper.throwIfNull(buff_action, () => $"buff_action is null !!! - {player.toBasicString()}");

        result = await buff_action.MoveServer(EPlaceType.World);
        if (result.isFail())
        {
            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        // 3. otp 생성
        (result, var reserved_to_switch_server) = await ServerConnectionSwitchHelper.startServerSwitch(player, server_logic.getRedisConnector(), server_info.Name);
        if (result.isFail() || null == reserved_to_switch_server)
        {
            err_msg = $"Fail to startServerSwitch() !!! : {result.toBasicString()}";
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;
        }

        var game_login_action = player.getEntityAction<GameLoginAction>();
        NullReferenceCheckHelper.throwIfNull(game_login_action, () => $"game_login_action is null !!! - {player.toBasicString()}");

        var login_cache = game_login_action.getLoginCacheRequest()?.getLoginCache();
        NullReferenceCheckHelper.throwIfNull(login_cache, () => $"LoginCache is null !!! - player:{player.toBasicString()}");

        login_cache.ReservedToSwitchServer = reserved_to_switch_server;
        
        var gameServer_connection_info = new ServerConnectInfo
        {
            ServerAddr = server_info.Address,
            ServerPort = server_info.Port,
            Otp = reserved_to_switch_server.OneTimeKey,
        };
        
        var location_attribute = player.getEntityAttribute<LocationAttribute>();
        NullReferenceCheckHelper.throwIfNull(location_attribute, () => $"location attribute is null !!! - {player.toBasicString()}");

        var batch = new QueryBatchEx<QueryRunnerWithDocument>(player, LogActionType.LeaveInstance, server_logic.getDynamoDbClient());
        {
            batch.addQuery(new DBQWriteToAttributeAllWithTransactionRunner());
            batch.addQuery(new QueryFinal());
        }
        
        var server_name = ServerType.Indun.toServerName(gameServer_connection_info.ServerAddr, (ushort)gameServer_connection_info.ServerPort);

        var arrival_position_log_info = PositionBusinessLogHelper.toPositionLogInfo(PositionMoveType.Arrival, server_name, ""
            , MapFileType.World, 0, new());
        var arrival_position_business_log = new PositionBusinessLog(arrival_position_log_info);
        invokers.Add(arrival_position_business_log);

        //로그 추가
        batch.appendBusinessLogs(invokers);
        
        result = await QueryHelper.sendQueryAndBusinessLog(batch);
        if (result.isFail())
        {
            err_msg = $"Failed to runTransactionRunnerSafely() !!! : {result.toBasicString()} - {player.toBasicString()}";
            Log.getLogger().error(err_msg);

            send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, null);
            return result;            
        }

        send_S2C_ACK_LEAVE_BATTLE_INSTANCE(player, result, gameServer_connection_info);
        
        Log.getLogger().debug($"LeaveBattleInstance gameServer_connection_info : {JsonConvert.SerializeObject(gameServer_connection_info)}, player : {player.toBasicString()}");
        return result;
    }
    
    public bool send_S2C_ACK_LEAVE_BATTLE_INSTANCE(Player owner, Result result, ServerConnectInfo? server_info)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

        ack_packet.Response.ErrorCode = result.ErrorCode;
        ack_packet.Response.AckLeaveBattleInstance = new ClientToGameRes.Types.GS2C_ACK_LEAVE_BATTLE_INSTANCE();

        if (result.isSuccess() && null != server_info)
        {
            ack_packet.Response.AckLeaveBattleInstance.GameServerAddr = server_info.ServerAddr;
            ack_packet.Response.AckLeaveBattleInstance.GameServerPort = server_info.ServerPort;
            ack_packet.Response.AckLeaveBattleInstance.Otp = server_info.Otp;
        }

        if (false == GameServerApp.getServerLogic().onSendPacket(owner, ack_packet))
        {
            return false;
        }

        return true;
    }
}