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.SendMailReq), typeof(SendMailPacketHandler), typeof(GameLoginListener))]
public class SendMailPacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_SEND_MAIL(Player player, Result result, Mail? sent_mail = null)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

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

        if(sent_mail != null)
        {
            ack_packet.Response.SendMailRes.MailInfo = new();
            ack_packet.Response.SendMailRes.MailInfo = sent_mail.toMailData4Client(MailType.SentMail);
        }

        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, () => $"entity_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_SEND_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.SendMailReq)}";
            result.setFail(ServerErrorCode.ClassTypeCastIsNull, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_SEND_MAIL(entity_player, result);
            return result;
        }

        var request = game_msg.Request.SendMailReq;
        string to_user_guid = request.ToGuid;

        if(to_user_guid == string.Empty)
        {
            var server_logic = GameServerApp.getServerLogic();
            var dynamo_db_client = server_logic.getDynamoDbClient();
            
            (result, var nickname_attrib) = await NicknameHelper.findNickname(request.ToNickName);
            if (result.isFail())
            {
                send_S2C_ACK_SEND_MAIL(entity_player, result);
                return result;
            }

            NullReferenceCheckHelper.throwIfNull(nickname_attrib, () => $"nickname_attrib is null !!!");

            to_user_guid = nickname_attrib.UserGuid;
        }

        var user_block_action = entity_player.getEntityAction<BlockUserAgentAction>();
        if (user_block_action == null)
        {
            err_msg = $"Failed to get user block action : {nameof(BlockUserAgentAction)}";
            result.setFail(ServerErrorCode.EntityActionNotFound, err_msg);
            Log.getLogger().error(err_msg);
            send_S2C_ACK_SEND_MAIL(entity_player, result);
            return result;
        }

        //내가 차단한 유저면 보내지 않는다.
        if (user_block_action.isBlockUser(to_user_guid))
        {
            err_msg = $"Failed send mail with blocked user.";
            result.setFail(ServerErrorCode.MailBlockUserCannotSend, err_msg);
            send_S2C_ACK_SEND_MAIL(entity_player, result);
        }

        //상대방이 차단한경우 상대방에겐 보내지 않고 정상 처리 되도록
        (result, bool isblocked) = await user_block_action.amIBockedFromOthers(to_user_guid);
        if (result.isFail())
        {
            send_S2C_ACK_SEND_MAIL(entity_player, result);
            return result;
        }

        if (isblocked == true)
        {
            send_S2C_ACK_SEND_MAIL(entity_player, result);
            return result;
        }

        result = await mail_action.trySendMail(request.ToNickName, to_user_guid, request.Title, request.MailText);
        if (result.isFail())
        {
            err_msg = $"Failed to trySendMail() !!! : {result.toBasicString()} - {entity_player.toBasicString()}";
            Log.getLogger().error(err_msg);
            send_S2C_ACK_SEND_MAIL(entity_player, result);
            return result;
        }
        await QuestManager.It.QuestCheck(entity_player, new QuestMail(EQuestEventTargetType.MAIL, EQuestEventNameType.SENDED, request.MailText));

        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_SEND_MAIL(player, errorResult);
    }
}