using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Collections;
using System.Net;
using System.Net.NetworkInformation;

namespace SafeNetLib
{
    public class RouteManager
    {
        private ArrayList imeiList;
        private static string radioIP;
        private static string radioInterface;
        public static string networkID = "";
        private static bool radioStatus;
        private static bool capacityPlus;


        public RouteManager(string _radioIP, ArrayList _imeiList, bool _capacityPlus)
        {
            radioIP = _radioIP;
            imeiList = _imeiList;
            capacityPlus = _capacityPlus;

            try
            {
                //adding 1 to the IP of the radio to get the interface IP
                string[] arrStr = (radioIP).Split('.');
                int lastPartOfIP = Convert.ToInt32(arrStr[3]);
                arrStr[3] = (lastPartOfIP + 1).ToString();
                string interfaceIP = arrStr[0] + "." + arrStr[1] + "." + arrStr[2] + "." + arrStr[3];
                radioInterface = interfaceIP;
                radioStatus = false;
            }
            catch (Exception ex)
            {
                string err = "Fatal Error:" + ex.ToString();
                Utils.ConsWrite(DebugMSG_Type.always, err);
                Utils.ConsWrite(DebugMSG_Type.Routes, "Fatal ERROR");
                Console.WriteLine("Press any key to continue...");
                Thread.Sleep(5000);
                System.Environment.Exit(0);
            }
        }

        public void Start()
        {
            //SM.Debug("Starting ping thread for:" + radioGwList[i].InterfaceIP+ "interval:"+Main.pingInterval);
            PingThread threadWorker = new PingThread(radioInterface, 5);
            threadWorker.OnNewPingComplete += new PingThread.NewPingCompleteDEl(RouteManager_OnNewPingComplete);
            Thread PingThreadObj = new Thread(new ThreadStart(threadWorker.Worker));
            PingThreadObj.IsBackground = true;
            PingThreadObj.Start();
        }

        void restoreRoutes(string ip_temp)
        {
            try
            {
                
                if (imeiList != null)
                {
                    if (imeiList.Count > 0)
                    {
                        foreach (string imei in imeiList)
                        {
                            //register route
                            if (!capacityPlus)
                            {
                                if (networkID != "")
                                {
                                    RoutingUtils.addRoute(imei, ip_temp, networkID);
                                }
                                else
                                {
                                    Utils.ConsWrite(DebugMSG_Type.Routes, "RouteManager.NetworkIDs_Hash does not contain a key for " + ip_temp);
                                }
                            }
                        }
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("**************\nCould not restore routes\n" + e.ToString());
            }
        }

        void RouteManager_OnNewPingComplete(bool status, string ip)
        {
            //Console.WriteLine("****** OnNewPingComplete ** " + status + " *** " + ip);
            string ip_temp = RadioUtils.GetReverse_Interface(ip);

            //bool value = radioStatus;
            if (this.OnRadioPing != null)
            {
                this.OnRadioPing(status, ip_temp);
            }

            if (status) //radio going from OFF->ON
            {
                try
                {
                    radioStatus = true;
                    //networkID = RadioUtils.GetInterfaceID(ip_temp);

                    //restoreRoutes(ip_temp);

                    if (this.OnRadioStatusUpdate != null)
                    {
                        this.OnRadioStatusUpdate(status, ip_temp);
                    }
                }
                catch (Exception ex)
                {
                    Utils.ConsWrite(DebugMSG_Type.Routes, "!!!!! Could not turn radio ON:" + ex.ToString());
                }
            }
            else //going from ON->OFF
            {
                try
                {
                    //Utils.ConsWrite(DebugMSG_Type.Routes, "GW:" + ip_temp + " was turned OFF!!!!");
                    //remove from hash
                    radioStatus = false;
                    networkID = "";

                    if (this.OnRadioStatusUpdate != null)
                    {
                        this.OnRadioStatusUpdate(status, ip_temp);
                    }
                }
                catch (Exception ex)
                {
                    Utils.ConsWrite(DebugMSG_Type.Routes, "!!!!!!! Could not turn radio OFF:" + ex.ToString());
                }
            }

        }

        public static void RegisterRouteARS(string suid, IPEndPoint interfaceReceived)
        {
            //register route
            if (!capacityPlus)
            {



                //Utils.ConsWrite(DebugMSG_Type.Routes, "ARSThread received ARS from field unit with ID " + suid + " on gateway radio with IP " + radioIP);
                if (interfaceReceived != null)
                {
                    String[] ip = interfaceReceived.Address.ToString().Split('.');
                    ip[3] = (Convert.ToInt16(ip[3]) - 1) + "";


                    Utils.WriteLine("GATEWAY ID IS:   " + ip[0] + "." + ip[1] + "." + ip[2] + "." + ip[3], ConsoleColor.Red);
                    Utils.WriteLine("INTERFACE ID IS: " + interfaceReceived.Address.ToString(), ConsoleColor.Red);

                    int interfaceID = 0;

                    interfaceID = GetInterfaceIndex(interfaceReceived.Address.ToString());

                    if(interfaceID > 0)
                    RoutingUtils.addRoute(suid, ip[0] + "." + ip[1] + "." + ip[2] + "." + ip[3], interfaceID + "");
                }
            }
        }

        private static int GetInterfaceIndex(string InterfaceIP)
        {
            int result = 0;

            NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
            IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();

            /*
            Console.WriteLine("IPv4 interface information for {0}.{1}",
                          properties.HostName, properties.DomainName);
            */

            foreach (NetworkInterface adapter in nics)
            {
                if (adapter.Supports(NetworkInterfaceComponent.IPv4) == false)
                {
                    continue;
                }

                if (adapter.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
                {
                    //Console.WriteLine(adapter.Name);
                    foreach (UnicastIPAddressInformation ip in adapter.GetIPProperties().UnicastAddresses)
                    {
                        if (ip.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
                        {
                            //Console.WriteLine(ip.Address.ToString());
                        }
                    }
                }

                //Console.WriteLine(adapter.Description);
                IPInterfaceProperties adapterProperties = adapter.GetIPProperties();

                foreach (UnicastIPAddressInformation ip in adapter.GetIPProperties().UnicastAddresses)
                {
                    if (ip.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork
                            && ip.Address.ToString().Equals(InterfaceIP))
                    {
                        Utils.WriteLine("CONTAINS " + ip.Address.ToString(), ConsoleColor.Cyan);
                        IPv4InterfaceProperties p = adapterProperties.GetIPv4Properties();
                        if (p == null)
                        {
                            //Console.WriteLine("No information is available for this interface.");
                            continue;
                        }

                        result = p.Index;
                        Console.WriteLine("  Index : {0}", p.Index);
                    }
                }
            }

            return result;
        }

        public static void RegisterRouteARS(string suid)
        {
            //register route
            if (!capacityPlus)
            {
                //Utils.ConsWrite(DebugMSG_Type.Routes, "ARSThread received ARS from field unit with ID " + suid + " on gateway radio with IP " + radioIP);
                if (networkID != "")
                {
                    RoutingUtils.addRoute(suid, radioIP, networkID);
                }
                else
                {
                    Utils.ConsWrite(DebugMSG_Type.Routes, "RouteManager  does not contain a networkID for " + radioIP);
                }
            }
        }

        public delegate void RadioStatusUpdateDEl(bool status, string ip);
        public event RadioStatusUpdateDEl OnRadioStatusUpdate;

        public delegate void RadioPingDEl(bool status, string ip);
        public event RadioPingDEl OnRadioPing;
    }
}