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

using ServerCore;
using ServerBase;
using ServerCommon;

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


namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.C2GS_REQ_ESCAPE_POSITION), typeof(EscapePositionPacketHandler), typeof(GameLoginListener))]
public class EscapePositionPacketHandler : PacketRecvHandler
{
    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!!");

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

        var request = recv_msg.Request.ReqEscapePosition;

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

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

        var selected_character = player_action.getSelectedCharacter();
        if (null == selected_character)
        {
            err_msg = $"Not selected Character !!! - {player.toBasicString()}";
            result.setFail(ServerErrorCode.CharacterNotSelected, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_ESCAPE_POSITION(player, result, null, 0);
            return result;
        }

        var character_action = selected_character.getEntityAction<CharacterAction>();
        NullReferenceCheckHelper.throwIfNull(character_action, () => $"character_action is null !!! - {selected_character.toBasicString()}");

        if (character_action.isFarming())
        {
            err_msg = $"Character is Farming !!! - {selected_character.toBasicString()}, {player.toBasicString()}";
            result.setFail(ServerErrorCode.FarimgState, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_ESCAPE_POSITION(player, result, null, 0);
            return result;
        }

        var escape_action = player.getEntityAction<EscapeAction>();
        if (escape_action == null)
        {
            err_msg = $"Failed to get escape action : {nameof(EscapeAction)}";
            result.setFail(ServerErrorCode.EntityActionNotFound, err_msg);
            Log.getLogger().error(err_msg);

            send_S2C_ACK_ESCAPE_POSITION(player, result, null, 0);
            return result;
        }

        //해당 패킷은 ProcessEscapePosition 함수 내에서 Res를 리턴해준다. 
        result = await escape_action.ProcessEscapePosition();
        if (result.isFail())
        {
            err_msg = $"Failed to AddCartProcess() !!! : {result.toBasicString()} - {player.toBasicString()}";
            Log.getLogger().error(err_msg);
            return result;
        }

        return result;
    }


    public static bool send_S2C_ACK_ESCAPE_POSITION(Player player, Result result, Pos? pos, long remainTime)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

        ack_packet.Response.ErrorCode = result.ErrorCode;
        ack_packet.Response.AckEscapePosition = new GS2C_ACK_ESCAPE_POSITION();

        ack_packet.Response.AckEscapePosition.RemainTime = remainTime;
        if (pos != null)
        {
            ack_packet.Response.AckEscapePosition.MovePosition = pos;
        }

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

        return true;
    }
}