using System;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;

namespace selfHostedHttp
{
    class Program
    {
        static void Main(string[] args)
        {
            var listener = new HttpListener();
            listener.Prefixes.Add("http://localhost:8080/");
            listener.Start();
            Console.WriteLine("Сервер начал прослушивание порта 8080");
            var path = GetPathHTMLFiles();
            try
            {
                while (true)
                {
                    var context = listener.GetContext();
                    var request = context.Request;
                    var response = context.Response;
                    var neededFile = request.Url.AbsolutePath;
                    string sendedFile = null;
                    if (neededFile == "/")
                        neededFile = "/firstPage.html";
                    else
                    {
                        if (File.Exists(path + neededFile))
                            sendedFile = neededFile;
                        else
                            sendedFile = "/errorPage.html";
                    }

                    var bytes = File.ReadAllBytes(path + sendedFile);
                    response.ContentLength64 = bytes.Length;

                    var sw = response.OutputStream;
                    sw.Write(bytes, 0, bytes.Length);
                    sw.Close();
                }
            }
            catch
            {
                listener.Stop();
                Console.WriteLine("Сервер закончил прослушивание порта 8080");
            }
        }

        private static string GetPathHTMLFiles()
        {
            var path = GetParentSeveralTimes(4);
            path += "\\www_root";
            return path;
        }

        private static string GetParentSeveralTimes(int count)
        {
            var path = Environment.CurrentDirectory;
            for (var i = 0; i < count; i++)
                path = Directory.GetParent(path).ToString();
            return path;
        }
    }
}