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


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


using static ClientToGameRes.Types;


namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.GetMailReq), typeof(GetMailPacketHandler), typeof(GameLoginListener))]
public class GetMailPacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_GET_MAIL(Player player, Result result, List<Mail>? new_mail_list = null, MailType mailType = MailType.None, int sendCount = 0)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

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

        ack_packet.Response.GetMailRes.MailType = (int)mailType;
        ack_packet.Response.GetMailRes.SendCount = sendCount;

        if (new_mail_list != null)
        {
            foreach (var new_mail in new_mail_list)
            {
                ack_packet.Response.GetMailRes.MailList.Add(new_mail.toMailData4Client(mailType));
            }
        }

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

        return true;
    }

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

        var entity_player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(entity_player, () => "player is null !!!");

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

            send_S2C_ACK_GET_MAIL(entity_player, result);
            return result;
        }

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

            send_S2C_ACK_GET_MAIL(entity_player, result);
            return result;
        }

        var request = game_msg.Request.GetMailReq;

        if(EnumHelper.isDefined<MailType>(request.MailType) == false)
        {
            err_msg = $"is Not Defined MailType !!! MailType : {request.MailType} - {entity_player.toBasicString()}";
            result.setFail(ServerErrorCode.ServerTypeInvalid, err_msg);
            Log.getLogger().error(err_msg);
            send_S2C_ACK_GET_MAIL(entity_player, result);
            return result;
        }

        var mail_type = (MailType)request.MailType;

        result = await mail_action.ProcessGetMail(mail_type);
        if(result.isFail() == true)
        {
            err_msg = $"Failed to ProcessGetMail() !!! : {result.toBasicString()} - {entity_player.toBasicString()}";
            Log.getLogger().error(err_msg);
            return result;
        }

        return 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_GET_MAIL(player, errorResult);
    }
}