public decimal GetPriceWithDiscount(int count, IDiscountCard discountCard)
{
if (this._singlePricingRule == null)
{
throw new SinglePriceNotSetException(this.Name);
}
decimal PriceWithDiscountCard(int productsCount)
{
var price = this.GetFullPrice(productsCount);
if (discountCard != null)
{
price = discountCard.Apply(price);
}
return(price);
}
if (this._volumePricingRule == null)
{
return(PriceWithDiscountCard(count));
}
int volumesCount = count / this._volumePricingRule.Count;
int singlesCount = count % this._volumePricingRule.Count;
var totalPrice = volumesCount * this._volumePricingRule.Price +
PriceWithDiscountCard(singlesCount);
return(totalPrice);
}
public PurchaseInformaton ProcessPurchase(decimal purchaseValue, IDiscountCard card)
{
if (purchaseValue < 0)
{
throw new ArgumentException(nameof(purchaseValue), $"{nameof(purchaseValue)} cannot be less than 0");
}
return(new PurchaseInformaton
{
DiscountRate = card.DiscountRate,
PurchaseValue = purchaseValue
});
}
public void FinishSale()
{
var totalWithoutDiscount = 0m;
foreach (var(code, quantity) in _scannedProducts)
{
totalWithoutDiscount += _knownProducts[code].CalculatePrice(quantity, 0).FullPrice;
}
_discountCard.AddAmount(totalWithoutDiscount);
_discountCard = DiscountCard.None;
_scannedProducts.Clear();
}
public string Calculate(IDiscountCard card, decimal purchase)
{
card.CalculateDiscount();
var discount = purchase * card.DiscountRate;
var total = purchase - discount;
var result = new StringBuilder();
result.AppendLine($"Purchase value: ${purchase:F2}");
result.AppendLine($"Discount rate: {card.DiscountRate * 100:F1}%");
result.AppendLine($"Discount: ${discount:F2}");
result.AppendLine($"Total: ${total:F2}");
return(result.ToString().TrimEnd());
}
public static string Pay(ICart ShoppingCart, IDiscountCard Card)
{
double cardDiscountRate = Card.DiscountRate;
double purchaseValue = ShoppingCart.PurchaseValue;
double purchaseDiscount = CalculatePurchaseDiscount(purchaseValue, cardDiscountRate);
double totalAmount = CalculateTotalAmount(purchaseValue, purchaseDiscount);
string owner = Card.CardHolder.FulName;
StringBuilder InvoiceBuilder = new StringBuilder();
InvoiceBuilder.Append(string.Concat(PURCHASE_VALUE, purchaseValue.ToString("C"))).Append(Environment.NewLine)
.Append(string.Concat(DISCOUNT_RATE, cardDiscountRate.ToString() + '%'))
.Append(Environment.NewLine)
.Append(string.Concat(PURCHASE_DISCOUNT, purchaseDiscount.ToString("C")))
.Append(Environment.NewLine)
.Append(string.Concat(TOTAL_AMOUNT, totalAmount.ToString("C")))
.Append(Environment.NewLine)
.Append(string.Concat(BUYER_OWNER, owner));
return(InvoiceBuilder.ToString());
}
public void ApplyDiscountCard(IDiscountCard discountCard)
{
this._cart.ApplyCard(discountCard);
}
public void IUseDiscountCard(int percent)
{
this._discountCard = new DiscountCard(percent);
this._terminal.ApplyDiscountCard(this._discountCard);
}
public DiscountCardDiscount(IDiscountCard discountCard)
{
_discountCard = discountCard;
}
public void ApplyCard(IDiscountCard discountCard)
{
this.DiscountCard = discountCard;
this.PriceWithDiscount = this._cartItems.Values.Sum(ci => ci.GetPriceWithDiscount(discountCard));
}
public void SetDiscountCard(IDiscountCard discountCard)
{
Ensure.That(discountCard).IsNotNull();
_discountCard = discountCard;
}
public decimal GetPriceWithDiscount(IDiscountCard discountCard) => this.Product.GetPriceWithDiscount(this.Count, discountCard);
