/// <summary>
///
/// </summary>
/// <param name="products"></param>
/// <returns></returns>
public AfterPromotionResult ApplyPromotion(char[] products)
{
var response = new AfterPromotionResult();
double price = 0.0;
if (!_rules.Any())
{
throw new PromotionRulesNotFound();
}
foreach (var rule in _rules)
{
response = rule.Invoke(products);
products = response.RemainingProducts.ToArray();
price += response.PromotedProductsPrice;
}
response.RemainingProducts = products;
response.PromotedProductsPrice = price;
return(response);
}
static public AfterPromotionResult ApplyCDPromotion(IList <char> products)
{
var promotedProducts = new AfterPromotionResult();
products = products.ToList();
while (true)
{
if (products.Any(t => t == 'C') && products.Any(t => t == 'D'))
{
promotedProducts.PromotedProducts.Add('C');
promotedProducts.PromotedProducts.Add('D');
promotedProducts.PromotedProductsPrice = 30;
products.Remove('C');
products.Remove('D');
}
else
{
break;
}
}
promotedProducts.RemainingProducts = products;
return(promotedProducts);
}
static public AfterPromotionResult ApplyBCPromotion(IList <char> products)
{
products = products.ToList();
var promotedProducts = new AfterPromotionResult();
while (true)
{
if (products.Count(t => t == 'B') >= 2)
{
promotedProducts.PromotedProducts.Add('B');
promotedProducts.PromotedProductsPrice += 45;
for (int i = 0; i < 2; i++)
{
products.Remove('B');
}
}
else
{
break;
}
}
promotedProducts.RemainingProducts = products;
return(promotedProducts);
}