using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;

public class Program
{
    static readonly HttpClient client = new HttpClient();

    public class PaymentDetail
    {
        public double Amount { get; set; }
        public string MerchantUniqueCode { get; set; }
        public int CurrencyId { get; set; }
        public string MerchantSuccessBackUrl { get; set; }
        public string MerchantFailBackUrl { get; set; }
        public int Installement { get; set; }
        public int ChannelId { get; set; }
        public int TagId { get; set; }
        public bool Half3D { get; set; }
    }

    public class Card
    {
        public string OwnerName { get; set; }
        public string Number { get; set; }
        public string ExpireMonth { get; set; }
        public string ExpireYear { get; set; }
        public string Cvv { get; set; }
        public string UniqueCode { get; set; }
    }

    public class Customer
    {
        public string FullName { get; set; }
        public string Phone { get; set; }
        public string Email { get; set; }
        public string Country { get; set; }
        public string City { get; set; }
        public string Address { get; set; }
        public string IdentityNumber { get; set; }
        public string TaxNumber { get; set; }
    }

    public class Product
    {
        public string ProductId { get; set; }
        public string ProductName { get; set; }
        public string ProductCategory { get; set; }
        public string ProductDescription { get; set; }
        public double ProductAmount { get; set; }
    }

    public class Root
    {
        public PaymentDetail PaymentDetail { get; set; }
        public Card Card { get; set; }
        public Customer Customer { get; set; }
        public Product[] Products { get; set; }
    }

    public static async Task Main()
    {
        Root root = new Root
        {
            PaymentDetail = new PaymentDetail
            {
                Amount = 9.85,
                MerchantUniqueCode = "AJSHFSAKFHASKHFA",
                CurrencyId = 1,
                MerchantSuccessBackUrl = "https://merchantsite.site.com/success",
                MerchantFailBackUrl = "https://merchantsite.site.com/fail",
                Installement = 1,
                ChannelId = 0,
                TagId = 0,
                Half3D = false
            },
            Card = new Card
            {
                OwnerName = "John Doe",
                Number = "5528790000000008",
                ExpireMonth = "12",
                ExpireYear = "2030",
                Cvv = "123",
                UniqueCode = ""
            },
            Customer = new Customer
            {
                FullName = "FullName",
                Phone = "5336662211",
                Email = "enes@xcompany.com",
                Country = "Country",
                City = "City",
                Address = "Address",
                IdentityNumber = "IdentityNumber",
                TaxNumber = "TaxNumber"
            },
            Products = new Product[] {
                new Product {
                    ProductId = "ProductId",
                    ProductName = "ProductName",
                    ProductCategory = "ProductCategory",
                    ProductDescription = "ProductDescription",
                    ProductAmount = 9.85
                }
            }
        };

        string json = JsonConvert.SerializeObject(root, Formatting.Indented);
        var data = new StringContent(json, Encoding.UTF8, "application/json");

        client.DefaultRequestHeaders.Add("apikeypublic", "%%");
        client.DefaultRequestHeaders.Add("apiclientpublic", "%%");

        var url = "{{Base Adres}}/api/paywall/payment/startdirect";
        var response = await client.PostAsync(url, data);

        string result = response.Content.ReadAsStringAsync().Result;
        Console.WriteLine(result);
    }
}