using Grand.Business.Core.Interfaces.Checkout.Orders;
using Grand.Domain.Orders;
using Grand.Infrastructure.Events;
using MediatR;

namespace Grand.Business.Checkout.Events.Orders;

public class MerchandiseReturnDeletedEventHandler : INotificationHandler<EntityDeleted<MerchandiseReturn>>
{
    private readonly IOrderService _orderService;

    public MerchandiseReturnDeletedEventHandler(IOrderService orderService)
    {
        _orderService = orderService;
    }

    public async Task Handle(EntityDeleted<MerchandiseReturn> notification, CancellationToken cancellationToken)
    {
        var order = await _orderService.GetOrderById(notification.Entity.OrderId);
        if (order != null)
        {
            foreach (var item in notification.Entity.MerchandiseReturnItems)
            {
                var orderItem = order.OrderItems.FirstOrDefault(x => x.Id == item.OrderItemId);
                if (orderItem != null)
                    orderItem.ReturnQty -= item.Quantity;
            }

            await _orderService.UpdateOrder(order);
        }
    }
}