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

public class SimpleTcpSrvr
{
    public static void Main()
    {
        int recv;
        byte[] data = new byte[10240];

        IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);
        Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        newsock.Bind(ipep);
        newsock.Listen(10);

        while(true)
        {
        try{
            
            Console.WriteLine("Waiting for a client...");
            Socket client = newsock.Accept();
            IPEndPoint clientep = (IPEndPoint)client.RemoteEndPoint;
            Console.WriteLine("Connected with {0} at port {1}", clientep.Address, clientep.Port);

            //Invia il primo pacchetto al client
            string startdata = "HTTP/1.0 SERVER WEB\r\n Server:SERverONE\r\n\r\n";

            /*Invio dei primi dati
            data = Encoding.ASCII.GetBytes(startdata);
            client.Send(data, data.Length, SocketFlags.None);*/

            //Variabile ordinaria (dipende il while)
            bool recdata = true;
            while (recdata)
            {
                //Dichiarazioni e preparazione al processo
                data = new byte[10240];
                recv = client.Receive(data);
                if (recv == 0) break;

                Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));

                //Ottenere comando impartito dal client
                int i = 0;
                string result = "";
                string edati = Encoding.ASCII.GetString(data, 0, recv);
                string[] split = edati.Split(new Char[] {' '});
                foreach (string s in split)
                {
                    i += 1;
                    if (i == 2) result = s;
                }

                //Aprire il file selezionato in caso che non esista alcuna corrispondenza di comando
                string readfile = "";
                string dires = Path.GetDirectoryName(Environment.GetCommandLineArgs()[0]) + "/www" + result;

                if(System.IO.File.Exists(dires) == true) 
                    {                        
                    FileStream stream = File.Open(dires, FileMode.Open);
                   
                    StreamReader reader = new StreamReader(stream);
                    readfile = reader.ReadToEnd();
                    reader.Close();
                    }

                //Preparazione dati in invio
                if (Path.GetExtension(dires) == ".html") startdata = "<!-- " + Encoding.ASCII.GetString(data, 0, recv) + "\nBy SERverONE -->\n\n" + readfile;
                else startdata = readfile;

                //Conversione dei byte
                /*System.Text.Encoding enc = System.Text.Encoding.ASCII;
                data = enc.GetBytes(startdata);*/


                data = Encoding.UTF8.GetBytes(startdata);
                client.Send(data, data.Length, SocketFlags.None);

                recdata = false;
            }
            Console.WriteLine("Disconnected from {0}", clientep.Address);

            client.Close();
            
            //System.Threading.Thread.Sleep(data.Length);
        }
        catch (Exception e)
        {
            Console.WriteLine("\n{0} Exception caught.\n", e);
            //Console.WriteLine("\nThere is an error.\n", e);
        }
      }
        newsock.Close();
    }

}