public void HandleOffers(Receipt receipt, Dictionary <Product, Offer> offers, ISupermarketCatalog catalog)
{
foreach (var p in productQuantities.Keys)
{
double quantity = productQuantities[p];
if (offers.ContainsKey(p))
{
var offer = offers[p];
var unitPrice = catalog.GetUnitPrice(p);
var quantityAsInt = (int)quantity;
Discount discount = null;
int x = 1;
if (offer.OfferType == SpecialOfferType.ThreeForTwo)
{
x = 3;
}
else if (offer.OfferType == SpecialOfferType.TwoForAmount)
{
x = 2;
if (quantityAsInt >= 2)
{
var total = offer.Argument * (quantityAsInt / x) + quantityAsInt % 2 * unitPrice;
var discountN = unitPrice * quantity - total;
discount = new Discount(p, "2 for " + offer.Argument, discountN);
}
}
if (offer.OfferType == SpecialOfferType.FiveForAmount)
{
x = 5;
}
int numberOfXs = quantityAsInt / x;
if (offer.OfferType == SpecialOfferType.ThreeForTwo && quantityAsInt > 2)
{
var discountAmount = quantity * unitPrice -
((numberOfXs * 2 * unitPrice) + quantityAsInt % 3 * unitPrice);
discount = new Discount(p, "3 for 2", discountAmount);
}
if (offer.OfferType == SpecialOfferType.TenPercentDiscount)
{
discount = new Discount(p, offer.Argument + "% off", quantity * unitPrice * offer.Argument / 100.00);
}
if (offer.OfferType == SpecialOfferType.FiveForAmount && quantityAsInt >= 5)
{
var discountTotal = unitPrice * quantity -
(offer.Argument * numberOfXs + quantityAsInt % 5 * unitPrice);
discount = new Discount(p, x + " for " + offer.Argument, discountTotal);
}
if (discount != null)
{
receipt.AddDiscount(discount);
}
}
}
}
public Teller(ISupermarketCatalog catalog)
{
this.catalog = catalog;
}
