using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(

            Enum.GetValues<PaymentMethods>()

                .Select((e, i) => $"{i + 1}. {e.ToString()}")

                .Aggregate((x, y) => x + Environment.NewLine + y));

​

        var key = Console.ReadLine()!;

​

        var hasPaymentMethod = Enum.TryParse<PaymentMethods>(key, out var paymentMethod);

​

        if (!hasPaymentMethod) return;

​

        var cart = new Cart

        {

            TotalPrice = 1453M

        };

​

        switch (paymentMethod)

        {

            case PaymentMethods.CreditCard:

            {

                Console.Write("Card Number : ");

                var cardNumber = Console.ReadLine();

​

                if (string.IsNullOrEmpty(cardNumber)) return;

​

                Console.Write("Full Name : ");

                var fullName = Console.ReadLine();

​

                if (string.IsNullOrEmpty(fullName)) return;

​

                Console.Write("Expiry Date : ");

                var expiryDate = Console.ReadLine();

​

                if (string.IsNullOrEmpty(expiryDate)) return;

​

                Console.Write("Cvc : ");

                var cvc = Console.ReadLine();

​

                if (string.IsNullOrEmpty(cvc)) return;

​

                cart.SetPaymentStrategy(new CreditCardStrategy(cardNumber, fullName, expiryDate, cvc));

                break;

            }

            case PaymentMethods.Wallet:

                cart.SetPaymentStrategy(new WalletStrategy());

                break;

            default:

                throw new ArgumentOutOfRangeException();

        }

​

        cart.Pay();

    }

}

​

public interface IPaymentStrategy

{

    void Pay(decimal amount);

}

​

public class CreditCardStrategy : IPaymentStrategy

{

    private string CardNumber { get; set; }

    private string FullName { get; set; }

    private string ExpiryDate { get; set; }

    private string Cvc { get; set; }

​

    public CreditCardStrategy(string cardNumber, string fullName, string expiryDate, string cvc)

    {

        CardNumber = cardNumber;

        FullName = fullName;

        ExpiryDate = expiryDate;

        Cvc = cvc;

    }

​

    public void Pay(decimal amount)

    {

        Console.WriteLine("Paying with credit card");

    }

}

​

public class WalletStrategy : IPaymentStrategy

{

    public void Pay(decimal amount)

    {

        Console.WriteLine("Paying with wallet");

    }

}

​

public class Cart

{

    public decimal TotalPrice { get; set; }

    private IPaymentStrategy PaymentStrategy { get; set; }

​

    public void SetPaymentStrategy(IPaymentStrategy paymentStrategy)

    {

        PaymentStrategy = paymentStrategy;

    }

​

    public void Pay()

    {

        PaymentStrategy.Pay(TotalPrice);

    }

}

​

public enum PaymentMethods

{

    CreditCard = 1,

    Wallet = 2

}