using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Text.RegularExpressions;
using System.IO;

namespace IP_Viewer
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public String strHostname = "";

        private void Form1_Load(object sender, EventArgs e)
        {
            GetLocalHostname();
            GetLocalIP();
            GetExtIP();
            GetExtHostname();
        }

       

        private void GetLocalHostname()
        {
            strHostname = Dns.GetHostName();
            HostnameTextBox.Text = strHostname;
        }

        private void GetLocalIP()
        {
            IPHostEntry ipEntry = Dns.GetHostEntry(strHostname);
            IPAddress[] addr = ipEntry.AddressList;
            for (int i = 0; i < addr.Length; i++)
            {
                IPTextBox.Text += addr[i].ToString();
            }
        }

        public void GetExtIP()
        {
            string myWanIp = "http://www.mywanip.com";
            string strToFind = "\"ipaddress\">";
            string requestLine = "";
            HttpWebResponse response = null;
            HttpWebRequest request;

            try
            {
                request = (HttpWebRequest)WebRequest.Create(myWanIp);
                response = (HttpWebResponse)request.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), true);

                while (!reader.EndOfStream)
                {
                    requestLine = reader.ReadLine();
                    if (requestLine.Contains(strToFind))
                    {
                        requestLine = requestLine.Replace("<p class=\"ipaddress\">", "");
                        requestLine = requestLine.Replace("</p>", "");
                        ExtIPTextBox.Text = requestLine;
                    }
                }
            }
            catch (WebException ex)
            {
                MessageBox.Show("Error: " + ex.Message);
            }
        }

        private void GetExtHostname()
        {
            try
            {
                IPHostEntry IpEntry = Dns.GetHostByAddress(ExtIPTextBox.Text);
                ExtHostnameTextBox.Text = IpEntry.HostName.ToString();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.Message);
            }
        }

        private void RefreshButton_Click(object sender, EventArgs e)
        {
            HostnameTextBox.Clear();
            IPTextBox.Clear();
            ExtHostnameTextBox.Clear();
            ExtIPTextBox.Clear();

            GetLocalHostname();
            GetLocalIP();
            GetExtIP();
            GetExtHostname();
        }

        private void Form1_Resize(object sender, EventArgs e)
        {
            if (FormWindowState.Minimized == WindowState)
                Hide();
        }

        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            Show();
            WindowState = FormWindowState.Normal;
        }

        private void RestoreItem_Click(object sender, EventArgs e)
        {
            Show();
            WindowState = FormWindowState.Normal;
        }

        private void CloseItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

       
    }
}