using System;
using System.Text;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using System.Net.Http;

namespace App
{
    class Program
    {
        private const string url = "https://carlion.com/_register";
        private const int areaCodeLength = 3;
        private const int maxPhoneDigit = 8;
        private const int maxLocacityDigit = 743;
        private const int maxClientDigit = 10000;
        private const int phoneLength = 10;
        private const int sleepValue = 30000;

        [MTAThread]
        static void Main()
        {
            Task.Factory.StartNew(async() =>
            {
                while(true)
                {
                    using (var client = new HttpClient())
                    {
                        var user     = Guid.NewGuid().ToString().Replace("-", String.Empty);
                        var password = Guid.NewGuid().ToString().Replace("-", String.Empty);
                        var phone    = GenerateRandomPhone();
                        client.DefaultRequestHeaders.Add("X-Requested-With", "XMLHttpRequest");

                        var formContent = new FormUrlEncodedContent(new[]
                        {
                            new KeyValuePair<string, string>("phone", $"{phone}"),
                            new KeyValuePair<string, string>("email", $"{user}@yandex.ru"),
                            new KeyValuePair<string, string>("password", password)
                        });

                        var response = await client.PostAsync(url, formContent);
                        var content  = await response.Content.ReadAsByteArrayAsync();
                        Console.WriteLine($"Status code: {response.StatusCode}, User: {user}, Password: {password}");
                        Console.WriteLine($"Response: {Encoding.UTF8.GetString(content)}");
                        Thread.Sleep(sleepValue);
                    }
                }
            });

            Console.ReadLine();
        }

        static string GenerateRandomPhone()
        {
            var random = new Random();
            var number = new StringBuilder(phoneLength);

            for (var i = 0; i < areaCodeLength; i++)
                number = number.Append(random.Next(0, maxPhoneDigit).ToString());

            number.Append("-");
            number.Append(String.Format("{0:D3}", random.Next(0, maxLocacityDigit)));
            number.Append("-");
            number.Append(String.Format("{0:D4}", random.Next(0, maxClientDigit)));
            return number.ToString();
        }
    }
}