using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;

namespace MyFirstWebServer
{
    public class Server
    {
        private TcpListener tcpListener;
        private Thread listenThread;

        public Server()
        {
            this.tcpListener = new TcpListener(IPAddress.Any, 3000);
            this.listenThread = new Thread(new ThreadStart(ListenForClients));
            this.listenThread.Start();
        }

        public void ListenForClients()
        {
            this.tcpListener.Start();

            while (true)
            {
                //blocks until a client has connected to the server
                TcpClient client = this.tcpListener.AcceptTcpClient();

                //create a thread to handle communication
                //with connected client
                Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
                clientThread.Start(client);
            }
        }

        private void HandleClientComm(object client)
        {
            TcpClient tcpClient = (TcpClient)client;
            NetworkStream clientStream = tcpClient.GetStream();

            ASCIIEncoding encoder = new ASCIIEncoding();

            byte[] message = new byte[tcpClient.ReceiveBufferSize];
            int bytesRead;
            string messageString = string.Empty;

            while (true)
            {
                bytesRead = 0;

                try
                {
                    //blocks until a client sends a message
                    bytesRead = clientStream.Read(message, 0, message.Length);
                    //if(bytesRead > 0)
                    //    break;
                }
                catch
                {
                    //a socket error has occured
                    break;
                }

                if (bytesRead == 0)
                {
                    //the client has disconnected from the server
                    break;
                }

            }

            //Console.WriteLine("Received from Client: " + encoder.GetString(message));

            byte[] buffer = encoder.GetBytes("HTTP 1.1 200 OK");
            clientStream.Write(buffer, 0, buffer.Length);
            clientStream.Flush();

            tcpClient.Close();
        }
    }
}