using System;

namespace EventSourcing.Demo
{
    public class WarehouseProductEntity
    {
        public string Sku { get; set; }
        public int QuantityOnHand { get; set; }
        public DateTime Shipped { get; set; }
        public DateTime Received { get; set; }

        private readonly WarehouseProductState _warehouseProductState = new();

        public WarehouseProductEntity(string sku)
        {
            Sku = sku;
        }
        
        public void ShipProduct(int quantity)
        {
            if (quantity > _warehouseProductState.QuantityOnHand)
            {
                throw new InvalidDomainException("Cannot Ship to a negative Quantity on Hand.");
            }

            Shipped = DateTime.UtcNow;
            QuantityOnHand -= quantity;
        }
        
        public void ReceiveProduct(int quantity)
        {
            Received = DateTime.UtcNow;
            QuantityOnHand += quantity;
        }
        
        public void AdjustInventory(int quantity)
        {
            if (_warehouseProductState.QuantityOnHand + quantity < 0)
            {
                throw new InvalidDomainException("Cannot adjust to a negative Quantity on Hand.");
            }

            QuantityOnHand += quantity;
        }
    }
}