using System;

using System.Collections.Generic;

namespace Solid.InterviewQuestion

{

   public enum PaymentType

    {

        PayPal = 1,

        WorldPay = 2

    }

    // Stub class to act as a PayPal web service - cannot change it

    public class MockPayPalWebService

    {

        public string ObtainToken(string AccountName, string Password)

        {

            return "";

        }

​

        public string MakeRefund(decimal amount, string transactionId, string token)

        {

            return "Auth:0999";

        }

    }

    // Stub class to act as mock worldpay web service - cannot change it 

    public class MockWorldPayWebService

    {

        public string MakeRefund(decimal amount, string transactionId, string username, string password, string ProductId)

        {

            return "A_Success-09901";

        }

    }

    public class RefundRequest

    {

        public PaymentType Payment { get; set; }

        public string PaymentTransactionId { get; set; }

        public decimal RefundAmount { get; set; }

    }

​

    public class RefundResponse

    {

        public bool Success { get; set; }

        public string Message { get; set; }

    }

    // нужно реализовать

    public class RefundService

    {

        public RefundResponse Refund(RefundRequest refundRequest)

        {

           //TODO: needs implementation

        }

    }

​

    // todo: more implementaton if needed (can add own classes)

}