public void ApplyDiscount(IDiscountable item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
if (item.DiscountParameter < 2)
{
throw new InvalidOperationException("Invalid parameter");
}
if (item.DiscountRuleType != DiscountRuleType.BuyManyGetOneFree)
{
throw new InvalidOperationException("Invalid Discount rule applied");
}
if (item.Quantity == 1)
{
item.AfterDiscountPrice = item.UnitPrice;
return;
}
var anySingles = item.Quantity % item.DiscountParameter;
item.AfterDiscountPrice = anySingles == 0
? item.UnitPrice * item.Quantity * (item.DiscountParameter - 1) / item.DiscountParameter
: item.UnitPrice * ((item.Quantity - anySingles) * (item.DiscountParameter - 1) / item.DiscountParameter + anySingles);
item.AfterDiscountPrice = Math.Round(item.AfterDiscountPrice, 2);
}
public void ApplyDiscount(IDiscountable item)
{
if (!item.DiscountRuleType.HasValue)
{
item.AfterDiscountPrice = item.UnitPrice * item.Quantity;
return;
}
var discountRule = _discountRuleFactory.ResolveDiscountRule(item.DiscountRuleType.Value);
discountRule.ApplyDiscount(item);
}
public void ApplyDiscount(IDiscountable item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
if (item.DiscountRuleType != DiscountRuleType.None)
{
throw new InvalidOperationException("Invalid Discount rule applied");
}
item.AfterDiscountPrice = item.Quantity * item.UnitPrice;
}
public void ApplyDiscount(IDiscountable item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
if (item.DiscountRuleType != DiscountRuleType.Percentage)
{
throw new InvalidOperationException("Invalid Discount rule applied");
}
var fullPrice = item.Quantity * item.UnitPrice;
item.AfterDiscountPrice = Math.Round(fullPrice - fullPrice * item.DiscountParameter / 100, 2);
}
public double disCountSell(IDiscountable d)
{
Apple apple = d as Apple;
if (apple.weight < 10)
{
return(apple.weight * apple.unitPrice);
}
else if (apple.weight >= 10 && apple.weight <= 50)
{
return(apple.weight * apple.unitPrice * 0.88);
}
else
{
return(apple.weight * apple.unitPrice * 0.6);
}
}
