using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Net;
using MotoTRBO_GW;
using SafeMobileLib;
using System.Collections;
using System.Threading;
using MotoTRBO_XNL_Cmd;

namespace MotoTrbo_GW
{
    class EmergencyThread
    {
        private string user4radioCon = "emergency";
        private Int32 port;
        private UdpMulticast udpMulticast;
        private string trboRadioIP;
        private String mIP;
        private Int32 mPort;
        private RadioConnection rc;
        private bool ack_needed = false;
        private System.Threading.Timer timer;

        public EmergencyThread(RadioConnection rc_var,string trboIP, Int32 emergencyPort, String multicastID, String multicastPort)
        {
            port = emergencyPort;
            trboRadioIP = trboIP;
            mIP = multicastID;
            mPort = Int32.Parse(multicastPort);
            //rc = new RadioConnection(trboIP, port, user4radioCon);
            rc = rc_var;
            rc.OnEmergencyEvent += new RadioConnection.EmergencyEvent(radioCon_OnEmergencyEvent);
            //rc.Start();    
        
            //starting timer
            //timer = new System.Threading.Timer(timerDel, null, new TimeSpan(0, 0, 0), new TimeSpan(0, 0, 10));            
        }

        private void timerDel(Object state)
        {
            if (ack_needed == true)
            {
                SafeMobileLib.Utils.WriteLine("Emergency was not ACK sending ACK again!!!");
                rc.SendEmergencyACK();
            }
        }

        void radioCon_OnEmergencyEvent(int radioId,bool status)
        {
            //emergency on
            if (status)
            {
                SafeMobileLib.Utils.WriteLine("Received emergency from radio id: " + radioId);
                string seqID = "0.0";
                string toSend = "#138#" + radioId + "#";
                String cmdok = "#" + seqID + toSend;
                Int32 tmp = cmdok.Length + 1;
                tmp += tmp.ToString().Length;
                cmdok = "#" + tmp.ToString() + cmdok;
                System.Text.Encoding enc = System.Text.Encoding.ASCII;
                byte[] buf = enc.GetBytes(cmdok);
                //put on multicast bus
                SafeMobileLib.Utils.WriteLine("Emergency alarm sent on multicast bus: " + cmdok);
                udpMulticast.Send(buf, buf.Length);

                //add timer for ack
                timer = new System.Threading.Timer(timerDel, null, new TimeSpan(0, 0, 10), new TimeSpan(0, 0, 10));
                ack_needed = true;
            }
            //emergency off
            else
            {
                SafeMobileLib.Utils.WriteLine("Received emergency ACK for radio id: " + radioId);
                ack_needed = false;
                timer = null;
            }
        }

        public void handleConnection()
        {
            SafeMobileLib.Utils.WriteLine("Emergency Thread - Initialized on Port " + port);
            try
            {
                udpMulticast = new UdpMulticast(mIP, mPort);
                SafeMobileLib.Utils.WriteLine("Emergency thread successfully registered to multicast group");
            }
            catch (Exception ex)
            {
                SafeMobileLib.Utils.WriteLine("Emergency Thread exception while joining the multicast group: " + ex.ToString());
            }

            while (true)
            { Thread.Sleep(100); }
        }

        public void Disconnect()
        {
            /*
            if (rc != null)
            {
                rc.Stop();
                rc = null;
            }
             */
            if (udpMulticast != null)
            {
                udpMulticast.StopListen();
                udpMulticast = null;
            }
            if (timer != null)
            {
                timer.Dispose();
                timer = null;
            }
            rc.OnEmergencyEvent -= new RadioConnection.EmergencyEvent(radioCon_OnEmergencyEvent);
        }
    }
}