using Nettention.Proud;
using Google.Protobuf;
using Google.Protobuf.WellKnownTypes;


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



namespace GameServer.PacketHandler;


[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.C2GS_REQ_PREPARATION_FOR_LEAVING_BATTLE_INSTANCE), typeof(PreparationForLeavingBattleInstancePacketHandler), typeof(GameLoginListener))]
public class PreparationForLeavingBattleInstancePacketHandler : 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_PREPARE_FOR_LEAVING_BATTLE_INSTANCE(player, result);
            return result;
        }
        
        var req_msg = recvMessage as ClientToGame;
        ArgumentNullReferenceCheckHelper.throwIfNull(req_msg, () => $"req_msg is null !!! - {player.toBasicString()}");
        var request = req_msg.Request.ReqPreparationForLeavingInstance;
        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_PREPARE_FOR_LEAVING_BATTLE_INSTANCE(player, result);
            return result;
        }
        
        var packet_create_time = request.PacketCreateTime;
        if (packet_create_time is not null)
        {
            Log.getLogger().info($"Preparation For leaving Battle Instance Packet Received, packetCreateTime : {packet_create_time}, player : {player.toBasicString()}");
        }
        

        var room_id = player.getCurrentInstanceRoomId();
        var battle_instance_room = BattleInstanceManager.It.getBattleInstanceRoom(room_id);
        if (battle_instance_room == null)
        {
            err_msg = $"battle_instance_room is null : room_id - {room_id}";
            Log.getLogger().error(err_msg);
            result.setFail(ServerErrorCode.BattleInstanceInfoNotExist, err_msg);
            send_S2C_ACK_PREPARE_FOR_LEAVING_BATTLE_INSTANCE(player, result);
            return result;
        }

        var user_guid = player.getUserGuid();
        
        var fn_preparation_for_leaving = async delegate()
        {
            bool need_pod_combat_drop_noti = false;
            using (var releaser = await battle_instance_room.getAsyncLock())
            {
                
                var attribute = battle_instance_room.getEntityAttribute<BattleInstanceSnapshotAttribute>();
                NullReferenceCheckHelper.throwIfNull(attribute, () => $"attribute is null !!!");
                var current_owner_guid = attribute.m_combat_pod_mode.m_pod_combat.m_current_occupier_guid;
                need_pod_combat_drop_noti = user_guid.Equals(current_owner_guid);

                if (need_pod_combat_drop_noti)
                {
                    attribute.m_combat_pod_mode.m_pod_combat.changeDropState(player.getCurrentPositionInfo().Pos);
                    attribute.modifiedEntityAttribute();
                }
            }

            send_S2C_ACK_PREPARE_FOR_LEAVING_BATTLE_INSTANCE(player, result);
            BattleRoomNotifyHelper.broadcast_GS2C_NTF_PREPARATION_FOR_LEAVING_BATTLE_INSTANCE(battle_instance_room, user_guid);
            if (need_pod_combat_drop_noti)
            {
                BattleRoomNotifyHelper.broadcast_GS2C_NTF_POD_COMBAT_STATE(battle_instance_room);
            }

            var host_guid = battle_instance_room.m_host_migrator.getHostUserGuid();

            if (user_guid.Equals(host_guid))
            {
                var hosts = new List<HostID>();
                hosts.Add(player.getHostId());
                var p2p_group_id = battle_instance_room.m_instance_room.getMap().getP2PGroupId();
                var define_result = battle_instance_room.m_host_migrator.defineHost(p2p_group_id, new SuperPeerSelectionPolicy(), hosts.ToArray());
                if (define_result.isFail())
                {
                    Log.getLogger().warn(define_result.toBasicString());
                    //이걸 define_result로 넘겨야 되나 말아야 되나....리팩토링 후에 고민좀 해보자... 만약 두명이 동시에 나간다고 하면??
                    return result;
                }

                var new_host_user_guid = battle_instance_room.m_host_migrator.getHostUserGuid();
                BattleRoomNotifyHelper.broadcast_GS2C_NTF_P2P_HOST_UPDATE(battle_instance_room.m_instance_room, new_host_user_guid);
            }
            return result;
        };


        result = await player.runTransactionRunnerSafely(TransactionIdType.PrivateContents, "PreparationForLeavingBattleInstance", fn_preparation_for_leaving);
        if (result.isFail())
        {
            err_msg = $"Failed to runTransactionRunner() !!! : {result.toBasicString()} - {player.toBasicString()}";
            Log.getLogger().error(err_msg);
            send_S2C_ACK_PREPARE_FOR_LEAVING_BATTLE_INSTANCE(player, result);
        }
        
        
        return result;
    }

    public bool send_S2C_ACK_PREPARE_FOR_LEAVING_BATTLE_INSTANCE(Player player, Result result)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

        ack_packet.Response.ErrorCode = result.ErrorCode;
        ack_packet.Response.AckPreparationForLeavingInstance = new ClientToGameRes.Types.GS2C_ACK_PREPARATION_FOR_LEAVING_BATTLE_INSTANCE();

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

        return true;
    }
}