public override List<string> GetPromotionText(LineItem lineItem) {
List<string> promotionText = new List<string>();
int remainingQuantity = lineItem.Quantity;
int setsOfMinimumQuantities = 0;
int quantityToBeDiscounted = 0;
while (remainingQuantity >= minNumberItemsForPromotion) {
remainingQuantity -= minNumberItemsForPromotion;
setsOfMinimumQuantities++;
if (remainingQuantity >= quantityEligibleForDiscount) {
quantityToBeDiscounted += quantityEligibleForDiscount;
} else {
quantityToBeDiscounted += remainingQuantity;
}
remainingQuantity -= quantityEligibleForDiscount;
}
if (remainingQuantity < 0) {
remainingQuantity = 0;
}
promotionText.Add("Promotion: " + setsOfMinimumQuantities + " set of " + minNumberItemsForPromotion + " means you get the next " + quantityEligibleForDiscount + " at a discount of " + (discountPercentage * 100) + "% off");
if (remainingQuantity != 0) {
promotionText.Add("Remaining: " + remainingQuantity + " @ $" + String.Format("{0:0.00}",lineItem.PricePerUnit) + " each");
}
return promotionText;
}
public override double GetPromotionAdjustedTotalCost(LineItem lineItem) {
if (lineItem == null) {
return 0;
}
int remainingQuantity = lineItem.Quantity;
int setsOfMinimumQuantities = 0;
int quantityToBeDiscounted = 0;
while (remainingQuantity >= minNumberItemsForPromotion) {
remainingQuantity -= minNumberItemsForPromotion;
setsOfMinimumQuantities++;
if (remainingQuantity >= quantityEligibleForDiscount) {
quantityToBeDiscounted += quantityEligibleForDiscount;
} else {
quantityToBeDiscounted += remainingQuantity;
}
remainingQuantity -= quantityEligibleForDiscount;
}
if (remainingQuantity < 0) {
remainingQuantity = 0;
}
double costForMinimumSets = (setsOfMinimumQuantities * minNumberItemsForPromotion) * lineItem.PricePerUnit;
double remainingQuantityCost = remainingQuantity * lineItem.PricePerUnit;
double discountedCosts = quantityToBeDiscounted * (lineItem.PricePerUnit * discountPercentage);
return costForMinimumSets + remainingQuantityCost + discountedCosts;
}
public void AddItem(Item item) {
if (item == null) {
throw new ArgumentException(ERROR_MSG_ADDING_NULL_ITEM_TO_CART);
}
if (lineItems.ContainsKey(item)) {
lineItems[item].Increment();
} else {
LineItem lineItem = new LineItem(item);
lineItem.Increment();
lineItems.Add(item, lineItem);
}
}
public override double GetPromotionAdjustedTotalCost(LineItem lineItem) {
if (lineItem == null) {
return 0;
}
int setsOfMinimumQuantities = lineItem.Quantity / minNumberItemsForPromotion;
double adjustedPromotionCostForSets = setsOfMinimumQuantities * promotionPrice;
int remainingQuantity = lineItem.Quantity % minNumberItemsForPromotion;
double remainingQuantityCost = remainingQuantity * lineItem.PricePerUnit;
return adjustedPromotionCostForSets + remainingQuantityCost;
}
public override List<string> GetPromotionText(LineItem lineItem) {
List<string> promotionText = new List<string>();
int setsOfMinimumQuantities = lineItem.Quantity / minNumberItemsForPromotion;
double adjustedPromotionCostForSets = setsOfMinimumQuantities * promotionPrice;
int remainingQuantity = lineItem.Quantity % minNumberItemsForPromotion;
promotionText.Add("Promotion: " + setsOfMinimumQuantities + " set of " + minNumberItemsForPromotion + " @ $" + String.Format("{0:0.00}", promotionPrice) + " each");
if (remainingQuantity != 0) {
promotionText.Add("Remaining: " + remainingQuantity + " @ $" + String.Format("{0:0.00}", lineItem.PricePerUnit) + " each");
}
return promotionText;
}
public void AddItem(Item item, int quantity) {
if (item == null) {
throw new ArgumentException(ERROR_MSG_ADDING_NULL_ITEM_TO_CART);
}
if (quantity <= 0) {
throw new ArgumentException(ERROR_MSG_INVALID_QUANTITY);
}
if (DoesCartContainItem(item)) {
LineItem lineItem = GetLineItemForItem(item);
lineItem.Quantity = lineItem.Quantity + quantity;
} else {
LineItem lineItem = new LineItem(item);
lineItem.Quantity += quantity;
lineItems.Add(item, lineItem);
}
}
public override double GetPromotionAdjustedTotalCost(LineItem lineItem) {
if (lineItem == null) {
return 0;
}
int remainingQuantity = lineItem.Quantity;
int setsOfMinimumQuantities = 0;
while (remainingQuantity >= minNumberItemsForPromotion) {
remainingQuantity = remainingQuantity - minNumberItemsForPromotion;
setsOfMinimumQuantities++;
remainingQuantity = remainingQuantity - quantityFree;
}
if (remainingQuantity < 0) {
remainingQuantity = 0;
}
double costForMinimumSets = (setsOfMinimumQuantities * minNumberItemsForPromotion) * lineItem.PricePerUnit;
double remainingQuantityCost = remainingQuantity * lineItem.PricePerUnit;
return costForMinimumSets + remainingQuantityCost;
}
public override List<string> GetPromotionText(LineItem lineItem) {
List<string> promotionText = new List<string>();
int remainingQuantity = lineItem.Quantity;
int setsOfMinimumQuantities = 0;
while (remainingQuantity >= minNumberItemsForPromotion) {
remainingQuantity = remainingQuantity - minNumberItemsForPromotion;
setsOfMinimumQuantities++;
remainingQuantity = remainingQuantity - quantityFree;
}
if (remainingQuantity < 0) {
remainingQuantity = 0;
}
promotionText.Add("Promotion: " + setsOfMinimumQuantities + " set of " + minNumberItemsForPromotion + " means you get " + (setsOfMinimumQuantities * quantityFree) + " free");
if (remainingQuantity != 0) {
promotionText.Add("Remaining: " + remainingQuantity + " @ $" + String.Format("{0:0.00}",lineItem.PricePerUnit) + " each");
}
return promotionText;
}
abstract public List<string> GetPromotionText(LineItem lineItem);
abstract public double GetPromotionAdjustedTotalCost(LineItem lineItem);