using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;

namespace AutoFileCopyNet
{
    public class Monitoring
    {
        [DllImport("wininet.dll")]
        private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);
        private string IPAddress = null;
        private System.Timers.Timer aTimer = new System.Timers.Timer();
        private static int PingTime;
        private static string constatus;
        public void init()
        {
            aTimer.Interval = 1000;
            aTimer.Elapsed += new System.Timers.ElapsedEventHandler(OnTimer);
            aTimer.Enabled = true;
        }
        //计时器事件
        private void OnTimer(object sender, System.Timers.ElapsedEventArgs e)
        {
            if (!IsConnected())
            {
                WriteLog(0);
            }
            else
            {
                string Result = PingResult(IPAddress);
                if (Result != "Success")
                {
                    WriteLog(1);
                }
            }

        }

        //检测本机是否连接到互联网
        private bool IsConnected()
        {
            int I = 0;
            bool state = InternetGetConnectedState(out I, 0);
            return state;
        }

       
        int i = 0;
        //Ping IP地址, 返回TTL值.
        private string PingResult(string ip)
        {
            System.Net.NetworkInformation.Ping p = new System.Net.NetworkInformation.Ping();
            System.Net.NetworkInformation.PingOptions options = new System.Net.NetworkInformation.PingOptions();
            options.DontFragment = true;
            string data = "12345678901234567890123456789012";
            byte[] buffer = Encoding.ASCII.GetBytes(data);
            int timeout = 1000;
            System.Net.NetworkInformation.PingReply reply = p.Send(ip, timeout, buffer, options);
            PingTime = int.Parse(reply.RoundtripTime.ToString());
            constatus = reply.Status.ToString() + i.ToString();
            i++;
            return reply.Status.ToString();
        }

        private void WriteLog(int arg)
        {
            using (FileStream fs = new FileStream(@"" + System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase + IPAddress + ".txt", FileMode.OpenOrCreate, FileAccess.Write))
            {
                StreamWriter m_streamWriter = new StreamWriter(fs);
                m_streamWriter.BaseStream.Seek(0, SeekOrigin.End);
                switch (arg)
                {
                    case 0:
                        m_streamWriter.WriteLine("NetWork Disconnection Time:  " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "\n");
                        break;
                    case 1:
                        m_streamWriter.WriteLine("IPAddress Disconnection Time:  " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "\n");
                        break;
                    default:
                        break;
                }
                m_streamWriter.Flush();
                m_streamWriter.Close();
                fs.Close();
            }
        }

        public  void TimesConsole()
        {
            if ("Enable" == "Enable")
            {
                if (!string.IsNullOrEmpty(IPAddress))
                {
                    aTimer.Enabled = true;
                }
            }
            else
            {
                aTimer.Enabled = false;
            }
        }
    }
}