using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net.Sockets;
using System.Net;
using System.Collections;
using System.IO;
using System.Threading;




namespace servidor
{
    public partial class Servidor : Form
    {

        TcpListener ntpcListener;
        TcpClient ntcpClient = null;
        private Socket socket;





    public Servidor()
        {

            InitializeComponent();
            txtip.Text = GetLocalIPAddress();
            txtporto.Text = "23000";

        }

        public string gettime()
        {
            return string.Format("{0:HH:mm:ss tt}", DateTime.Now);
        }


        private void btnlogout_Click(object sender, EventArgs e)
        {
            this.Hide();
            Login este = new Login();
            este.Show();
        }

        private void btnlisten_Click(object sender, EventArgs e)
        {
            IPAddress ip;
            int porto;


            if (!IPAddress.TryParse(txtip.Text, out ip))
            {
                txtmsg.Text += gettime() + ": Ip Invalido\n";
                return;
            }
            if (!int.TryParse(txtporto.Text, out porto))
            {
                txtmsg.Text += gettime() + ": Porto Inválido\n";
                return;
            }
            ntpcListener = new TcpListener(ip, porto);
            ntpcListener.Start();
            txtmsg.Text += gettime() + ": Servidor à escuta\n";
            ntpcListener.BeginAcceptSocket(OnCompleteAcceptCliente, ntpcListener);





        }

        public  void OnCompleteAcceptCliente(IAsyncResult iar)
        {

            TcpListener tcpl = (TcpListener)iar.AsyncState;
            ntcpClient = tcpl.EndAcceptTcpClient(iar);
            Thread th = new Thread(new ThreadStart(this.connected));
            th.Start();




        }

        public void connected()
        {
            Thread.Sleep(2000);
            if (this.InvokeRequired)

            {

                this.Invoke(new MethodInvoker(connected));
                StreamWriter writer = new StreamWriter(ntcpClient.GetStream());
                writer.AutoFlush = true;
                writer.WriteLine(gettime() + ":Cliente aceite...");
                return;


            }
            txtmsg.Text += gettime() + ":Cliente aceite...\n";
        }




            public static string GetLocalIPAddress()
        {
            var host = Dns.GetHostEntry(Dns.GetHostName());
            foreach (var ip in host.AddressList)
            {
                if (ip.AddressFamily == AddressFamily.InterNetwork)
                {
                    return ip.ToString();
                }
            }
            throw new Exception("Local IP Address Not Found!");
        }

        private void btnsend_Click(object sender, EventArgs e)
        {
            enviar();
        }


        public  void enviar()
        {

            StreamWriter writer = new StreamWriter(ntcpClient.GetStream());
            writer.AutoFlush = true;
            writer.WriteLine(gettime() + ":" + txtmsgsend.Text );
            this.txtmsg.Text += gettime() +":" + txtmsgsend.Text + "\n";
            txtmsgsend.Text = "";
            if (txtmsgsend.Text == "/clear")
            {
                txtmsg.Text = "";
            }
            receber();
        }

        public void receber()
        {
            StreamReader reader = new StreamReader(ntcpClient.GetStream());
            this.txtmsg.Text += gettime() + ":" + reader.ReadLine() + "\n";
            return;


        }

        private void txtmsgsend_KeyPress(object sender, KeyPressEventArgs e)
        {

            if (e.KeyChar == (char)13)
            {
                enviar();
            }

        }







    }
}