// Ödeme tipi için enum değerler atayalım
public enum PaymentType
{
    [Display(Name = "Banka Transferi")]
    BankTransfer,
    [Display(Name = "Kredi Kartı")]
    CreditCard,
    [Display(Name = "QR Kodu")]
    QRCode
}


// Ödeme yöntemleri için arayüz (Product)
public interface IPayment
{
    void MakePayment(decimal amount);

}

// Farklı ödeme yöntemlerini temsil eden Somut Ürünler (Concrete Products)
public class BankTransferPayment : IPayment
{
    public void MakePayment(decimal amount)
    {
        if (amount > 0) Console.WriteLine($"Bank transfer payment succeed! Amount: {amount}");
        else Console.WriteLine("Bank transfer payment failed. Please enter a valid amount!");
    }
}

public class CreditCardPayment : IPayment
{
    public void MakePayment(decimal amount)
    {
        if (amount > 0) Console.WriteLine($"Credit card payment succeed! Amount: {amount}");
        else Console.WriteLine("Credit card payment failed. Please enter a valid amount!");
    }
}

public class QRCodePayment : IPayment
{
    public void MakePayment(decimal amount)
    {
        if (amount > 0) Console.WriteLine($"QR code payment succeed! Amount: {amount}");
        else Console.WriteLine("QR code payment failed. Please enter a valid amount!");
    }
}

// PaymentFactory Sınıfı (Creator)
public class PaymentFactory
{
    public IPayment CreatePayment(PaymentType paymentType)
    {
        switch (paymentType)
        {
            case PaymentType.BankTransfer: return new BankTransferPayment();
            case PaymentType.CreditCard: return new CreditCardPayment();
            case PaymentType.QRCode: return new QRCodePayment();
            default: throw new ArgumentException("Invalid payment type");
        }
    }
}


// Kullanım örneği

PaymentFactory factory = new PaymentFactory();

IPayment bankPayment = factory.CreatePayment(PaymentType.BankTransfer);
bankPayment.MakePayment(1500.12m);

IPayment creditCardPayment = factory.CreatePayment(PaymentType.CreditCard);
creditCardPayment.MakePayment(1800.12m);


IPayment qrCodePayment = factory.CreatePayment(PaymentType.QRCode);
qrCodePayment.MakePayment(1100);


//# Output:
Bank transfer payment succeed! Amount: 1500,12
Credit card payment succeed! Amount: 1800,12
QR code payment succeed! Amount: 1100