public void HandleOffers(Receipt receipt, Dictionary <Product, Offer> offers, IShoppingCatalog catalog)
{
foreach (var p in _productLine.Keys)
{
var quantity = _productLine[p];
var quantityAsInt = (int)quantity;
if (offers.ContainsKey(p))
{
var offer = offers[p];
var unitPrice = catalog.GetUnitPrice(p);
Discount discount = null;
var x = 1;
if (p.Name == "Rubber Gloves" && offer.OfferType == SpecialOfferType.ThreeForTwo && quantityAsInt > 2)
{
x = 3;
var numberOfXs = quantityAsInt / x;
var discountAmount = (quantity * unitPrice) - ((numberOfXs * 2 * unitPrice) + quantityAsInt % 3 * unitPrice);
discount = new Discount(p, "3 for 2", discountAmount);
}
if (p.Name == "Stethoscope" && offer.OfferType == SpecialOfferType.ThreeForAmount && quantityAsInt >= 3)
{
var discountAmount = (quantity * unitPrice) - (((quantityAsInt / 3) * 999) + (quantityAsInt % 3 * unitPrice));
discount = new Discount(p, "3 pcs for 999", discountAmount);
}
if (discount != null)
{
receipt.AddDiscount(discount);
}
}
}
}
public Receipt ChecksOutGoods(ShoppingCart shoppingCart)
{
var receipt = new Receipt();
var orderLines = shoppingCart.GetOrderLines();
if (orderLines.Count() == 0)
{
throw new ArgumentNullException("Cart is empty!");
}
else
{
foreach (OrderLine line in orderLines)
{
var p = line.Product;
var quantity = line.Quantity;
var unitPrice = _catalog.GetUnitPrice(p);
var price = quantity * unitPrice;
receipt.AddProduct(p, quantity, unitPrice, price);
}
shoppingCart.HandleOffers(receipt, _offers, _catalog);
}
return(receipt);
}