// Apply the promotions on the the sales invoice.
public float ApplyPromotion(PromotionOffer promotions, Dictionary <string, int> SalesInvoice)
{
// Single promotion
if (promotions.ProductOffer.Count == 1)
{
var key = promotions.ProductOffer.ElementAt(0).Key;
if (SalesInvoice.ContainsKey(key))
{
int quantityInvoice = SalesInvoice[key];
int offerQuantity = promotions.ProductOffer[key];
int offerscount = quantityInvoice / offerQuantity;
int remainingQuantity = quantityInvoice % offerQuantity;
SalesInvoice[key] = remainingQuantity;
return(offerscount * promotions.OfferPrice);
}
}
else
{ // Combo offer for 2 products
var key1 = promotions.ProductOffer.ElementAt(0).Key;
var key2 = promotions.ProductOffer.ElementAt(1).Key;;
if (SalesInvoice.ContainsKey(key1) && SalesInvoice.ContainsKey(key2))
{
int quantityInvoice1 = SalesInvoice[key1];
int offerQuantity1 = promotions.ProductOffer[key1];
int offerscount1 = quantityInvoice1 / offerQuantity1;
int remainingQuantity1 = quantityInvoice1 % offerQuantity1;
int quantityInvoice2 = SalesInvoice[key2];
int offerQuantity2 = promotions.ProductOffer[key2];
int offerscount2 = quantityInvoice2 / offerQuantity2;
int remainingQuantity2 = quantityInvoice2 % offerQuantity2;
if (offerscount1 <= offerscount2) // combo offer with least offer counts.
{
SalesInvoice[key1] = remainingQuantity1;
SalesInvoice[key2] = remainingQuantity2 + (offerQuantity2 * (offerscount2 - offerscount1));
return(offerscount1 * promotions.OfferPrice);
}
else
{
SalesInvoice[key1] = remainingQuantity1 + (offerQuantity1 * (offerscount1 - offerscount2));
SalesInvoice[key2] = remainingQuantity2;
return(offerscount2 * promotions.OfferPrice);
}
}
}
return(0);
}
public Promotions()
{
promotionsList = new List <PromotionOffer>();
PromotionOffer A = new PromotionOffer();
A.ProductOffer.Add("A", 3);
A.OfferPrice = 130;
promotionsList.Add(A);
PromotionOffer B = new PromotionOffer();
B.ProductOffer.Add("B", 2);
B.OfferPrice = 45;
promotionsList.Add(B);
PromotionOffer CandD = new PromotionOffer();
CandD.ProductOffer.Add("C", 1);
CandD.ProductOffer.Add("D", 1);
CandD.OfferPrice = 30;
promotionsList.Add(CandD);
}