using Google.Protobuf;
using Google.Protobuf.WellKnownTypes;

using ServerCore;
using ServerBase;
using ServerCommon;

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

using META_ID = System.UInt32;



namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.StopBuffReq), typeof(StopBuffPacketHandler), typeof(GameLoginListener))]
public class StopBuffPacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_STOP_BUFF(Player player, Result result)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

        ack_packet.Response.ErrorCode = result.ErrorCode;
        ack_packet.Response.StopBuffRes = new StopBuffRes();

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

        return true;
    }

    public override Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var result = new Result();
        var err_msg = string.Empty;

        var entity_player = entityWithSession as Player;
        ArgumentNullException.ThrowIfNull(entity_player, $"entity_player is null !!!");

        var buff_action = entity_player.getEntityAction<BuffAction>();
        if (buff_action == null)
        {
            err_msg = $"Failed to get buff action : {nameof(BuffAction)}";
            result.setFail(ServerErrorCode.EntityActionNotFound, err_msg);
            Log.getLogger().error(err_msg);

            send_S2C_ACK_STOP_BUFF(entity_player, result);
            return Task.FromResult(result);
        }

        var game_msg = recvMessage as ClientToGame;
        if (game_msg == null)
        {
            err_msg = $"Failed to cast ClientToGame !!! : {nameof(ClientToGame.Request.StopBuffReq)}";
            result.setFail(ServerErrorCode.ClassTypeCastIsNull, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_STOP_BUFF(entity_player, result);
            return Task.FromResult(result);
        }

        var request = game_msg.Request.StopBuffReq;

        (result, var del_buff_attribute) = buff_action.DelBuffProcess((META_ID)request.BuffId);
        if (result.isFail())
        {
            err_msg = $"Failed to DelBuffProcess() !!! : {result.toBasicString()} - {entity_player.toBasicString()}";
            Log.getLogger().error(err_msg);
            send_S2C_ACK_STOP_BUFF(entity_player, result);
            return Task.FromResult(result);
        }

        send_S2C_ACK_STOP_BUFF(entity_player, result);
        BuffNotifyHelper.send_S2C_NTF_DELETE_BUFF(entity_player, del_buff_attribute);

        return Task.FromResult(result);
    }

    public override async Task onProcessPacketException(ISession entityWithSession, IMessage recvMessage
                                       , Result errorResult)
    {
        await Task.CompletedTask;

        var player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!! - {entityWithSession.toBasicString()}");

        send_S2C_ACK_STOP_BUFF(player, errorResult);
    }
}