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.AddCartReq), typeof(AddCartPacketHandler), typeof(GameLoginListener))]
public class AddCartPacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_ADD_CART(Player player, Result result, META_ID item_meta_id = 0, Int32 count = 0)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

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

        if(count != 0 && item_meta_id != 0)
        {
            ack_packet.Response.AddCartRes.ChangeItem = new();
            ack_packet.Response.AddCartRes.ChangeItem.ItemId = (Int32)item_meta_id;
            ack_packet.Response.AddCartRes.ChangeItem.Count = count;
        }

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

            send_S2C_ACK_ADD_CART(entity_player, result);
            return result;
        }

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

            send_S2C_ACK_ADD_CART(entity_player, result);
            return result;
        }

        var request = game_msg.Request.AddCartReq;

        if(EnumHelper.tryParse<CurrencyType>(request.ItemInfo.BuyType, out var currency_type) == false)
        {
            err_msg = $"is Not Defined currencyType !!! currencyType : {request.ItemInfo.BuyType} - {entity_player.toBasicString()}";
            result.setFail(ServerErrorCode.CartInvalidCurrencyType, err_msg);
            Log.getLogger().error(err_msg);
            send_S2C_ACK_ADD_CART(entity_player, result);
            return result;
        }

        result = await cart_action.AddCartProcess((META_ID)request.ItemInfo.ItemId, request.ItemInfo.Count, currency_type);
        if (result.isFail())
        {
            err_msg = $"Failed to AddCartProcess() !!! : {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_ADD_CART(player, errorResult);
    }
}