using System;
using xNet.Net;
using System.IO;
using System.Text;
using System.Net.Sockets;
using System.Text.RegularExpressions;

namespace Library.Network
{
    public class BrowserTOR
    {
        public class result
        {
            public string url { get; internal set; }
            public string html { get; internal set; }
            public HttpStatusCode StatusCode { get; internal set; }
            public Exception exception { get; internal set; }
            public bool ReplyStatus { get; internal set; }
        }



        ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
        /////#############                                Обычные get запросы с куками контакта                               #############/////
        ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

        private static int CountGet = 0;
        private static Socks5ProxyClient socks = Socks5ProxyClient.Parse("127.0.0.1:9050");

        public result get(string url, Encoding encoding, string Referer = null, bool UsingTor = false)
        {
            HttpRequest request = null;
            result get = new result();

            try
            {
                request = new HttpRequest();
                request.UserAgent = "Safari/5.05 (Windows; U; Windows NT 6.0; ru; rv:1.9.2.13) Net/02022012 Safari/5.05.112";
                request.KeepAlive = true;
                request.Referer = Referer;
                request.MaximumAutomaticRedirections = 3;
                request.ReadWriteTimeout = 1000 * 30;
                request.ConnectTimeout = 1000 * 30;

                //Прокси тора
                if (UsingTor) 
                {
                    if (((CountGet++) % 40) == 0) { RefreshTor(DateTime.Now); }
                    request.Proxy = socks; 
                }

                //Получаем HTML страницу и записывае (ответ сервера и URL) 
                var Response = request.Get(url);
                get.url = Response.Address.AbsoluteUri;
                get.StatusCode = Response.StatusCode;
                get.html = Response.ToString();
                get.ReplyStatus = true;
            }
            catch (Exception ex)
            {
                get.exception = ex;
                ex = null;
            }
            finally
            {
                //Чистим ресурсы
                url = null;
                if (request != null)
                {
                    request.Dispose(); request = null;
                }
            }

            //Возвращаем результат
            return get;
        }



        ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
        /////#############                                         Смена IP адреса для тора                                   #############/////
        ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

        private int countConnection = 0;
        private static DateTime LastTime = DateTime.Now;

        public void RefreshTor(DateTime time)
        {
            //Конектимся к тору и обновляемм IP
            if (countConnection < 10 && (time - LastTime).Seconds < 30)
            {
                try
                {
                    //Подключение к тору
                    bool good = false;
                    Socket server = null;
                    try
                    {
                        server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                        server.Connect("127.0.0.1", 9051);
                    }
                    catch { }

                    //Авторизация по паролю
                    server.Send(Encoding.ASCII.GetBytes("AUTHENTICATE \"passwd\"\n"));

                    if (GetDataReceive(server).Contains("250"))
                    {
                        //сигнал о завершении смены цепочки серверов
                        server.Send(Encoding.ASCII.GetBytes("SETEVENTS SIGNAL\r\n"));
                        server.Send(Encoding.ASCII.GetBytes("SIGNAL NEWNYM\r\n"));
                        if (GetDataReceive(server).Contains("250"))
                        {
                            good = true;
                        }
                    }

                    //Чистим ресурсы
                    server.Shutdown(SocketShutdown.Both); server.Close(); server.Dispose(); server = null;

                    if (!good)
                    {
                        //Если смена IP не удалась, то пробуем еще раз
                        countConnection++;
                        RefreshTor(LastTime);
                    }
                }
                catch { }

                //Ждем
                System.Threading.Thread.Sleep(1000 * 3);
                LastTime = time;
            }
        }


        private string GetDataReceive(Socket server)
        {
            //Обрабатываем данные
            byte[] data = new byte[1024];
            int receivedDataLength = server.Receive(data);
            string stringData = Encoding.ASCII.GetString(data, 0, receivedDataLength);

            //Чистим ресурсы и возврашаем результат
            server = null; data = null;
            return stringData;
        }
    }
}