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


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.UserReportReq), typeof(UserReportPacketHandler), typeof(GameLoginListener))]
public class UserReportPacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_USER_REPORT(Player player, Result result)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

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

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

        return true;
    }

    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var player = entityWithSession as Player;
        ArgumentNullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!!");
        var req_msg = recvMessage as ClientToGame;
        ArgumentNullReferenceCheckHelper.throwIfNull(req_msg, () => $"req_msg is null !!! - {player.toBasicString()}");
        var request = req_msg.Request.UserReportReq;
        ArgumentNullReferenceCheckHelper.throwIfNull(request, () => $"request is null !!! - {player.toBasicString()}");

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

        var server_logic = GameServerApp.getServerLogic();
        var dynamo_db_client = server_logic.getDynamoDbClient();

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

        // 신고하기 조건 체크
        result = checkReportConditions(request);
        if (result.isFail())
        {
            send_S2C_ACK_USER_REPORT(player, result);
            return result;
        }
        
        (result, var nickname_attrib) = await NicknameHelper.findNickname(request.TargetNickName);
        if (result.isFail())
        {
            send_S2C_ACK_USER_REPORT(player, result);
            return result;
        }
        NullReferenceCheckHelper.throwIfNull(nickname_attrib, () => $"nickname_attrib is null !!! - {player.toBasicString()}");

        result = await user_report_action.UserReport(nickname_attrib.UserGuid, request.TargetNickName, request.Reason, request.Title, request.Detail);
        if (result.isFail())
        {
            send_S2C_ACK_USER_REPORT(player, result);
            return result;
        }
        send_S2C_ACK_USER_REPORT(player, result);

        return result;
    }

    private Result checkReportConditions(UserReportReq request)
    {
        var result = new Result();
        string err_msg;
        
        // 1. title 체크
        if (MetaHelper.GameConfigMeta.MinReportTitleNum > request.Title.Length
            || MetaHelper.GameConfigMeta.MaxReportTitleNum < request.Title.Length)
        {
            err_msg = $"fail to report user !!! : invalid title length - {request.Title.Length}";
            result.setFail(ServerErrorCode.UserReportInvalidTitleLength, err_msg);
            Log.getLogger().error(result.toBasicString());
            return result;
        }

        // 2. content 체크
        if (MetaHelper.GameConfigMeta.MinReportContentNum > request.Detail.Length
            || MetaHelper.GameConfigMeta.MaxReportContentNum < request.Detail.Length)
        {
            err_msg = $"fail to report user !!! : invalid content length - {request.Detail.Length}";
            result.setFail(ServerErrorCode.UserReportInvalidTitleLength, err_msg);
            Log.getLogger().error(result.toBasicString());
            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_USER_REPORT(player, errorResult);
    }
}