using System;
using System.Threading;
using System.Net;
using System.Text;
using System.Net.Sockets;

using Microsoft.SPOT;
using Microsoft.SPOT.Hardware; //need for Utility class
using Microsoft.SPOT.Net;
using GHI.Premium.Net;
using HSM;
using WIFI;

namespace WIFI
{
    public class WiFi
    {
        private static SynchronizedEventQueue  _anEventQ;
        private static WiFiRS9110              _wifi;
        private static bool                    _useDebug = false;

        public WiFi(SynchronizedEventQueue eq)
        {
            _anEventQ = eq;
            _wifi = new WiFiRS9110(SPI.SPI_module.SPI2, (Cpu.Pin)10, (Cpu.Pin)18, (Cpu.Pin)20);// FEZ Spider Socket 6
        }

        public static void Start_WIFI_Network()
        {

            if (!_wifi.IsOpen)
                _wifi.Open();

            _wifi.NetworkInterface.EnableStaticIP("134.89.8.58", "255.255.254.0", "134.89.8.1");

            _wifi.NetworkAddressChanged += new NetworkInterfaceExtension.NetworkAddressChangedEventHandler(wifi_NetworkAddressChanged);
            _wifi.WirelessConnectivityChanged += new WiFiRS9110.WirelessConnectivityChangedEventHandler(wifi_WirelessConnectivityChanged);

            NetworkInterfaceExtension.AssignNetworkingStackTo(_wifi);
            JoinNetwork();
        }

        // Your router SSID and PassKey neede to be set in here
        public static void JoinNetwork()
        {
            try
            {
                // Your router SSID needed here
                WiFiNetworkInfo[] ScanResp = _wifi.Scan("MBARI WiFi"); //< Needs to be changed to SSID you are looking for
                if (ScanResp != null && ScanResp.Length > 0)
                {
                    //Your passkey needed here
                    _wifi.Join(ScanResp[0], ""); //< needs to be changed to your Key
                    _anEventQ.Add((Signal)ProfilerEvents.WIFI_JoinedNetwork, 0, DateTime.Now.ToString());
                    if (_useDebug) { Debug.Print("***Joined to MBARI WiFi..."); }
                }
                else
                {
                    if (_useDebug) { Debug.Print("***MBARI WiFi was not found"); }
                }
            }
            catch (Exception e)
            {
                if (_useDebug) { Debug.Print("!!! Exception : " + e.Message); }
            }
        }

        public static void wifi_NetworkAddressChanged(object sender, EventArgs e)
        {
            NTP.Time("us.pool.ntp.org", (-(60 * 7)));
            _anEventQ.Add((Signal)ProfilerEvents.WIFI_TimeSetBy_NTP, 0, DateTime.Now.ToString());
            RunServer();
        }

       public static void wifi_WirelessConnectivityChanged(object sender, WiFiRS9110.WirelessConnectivityEventArgs e)
        {
            string s = _wifi.NetworkInterface.IPAddress;
            int rssi = e.NetworkInformation.RSSI;
            _anEventQ.Add((Signal)ProfilerEvents.WIFI_ConnectivityChanged, rssi, s);
            if (e.IsConnected)
            {
                // Add the time zone offset to the retrieved UTC Time
                // (in this example, it assumes that the time zone is GMT-6).
                // You will need to adjust TimeService.SetTimeZoneOffset value for your time zone

                //UTC -6 hours for Central Standard Time. Use -(60 * 5) for Daylight savings time.
                //You will need to change NTPTime to your Time Zone
            }
        }

        private static void RunServer()
        {
            // Initiates a new shell on port 23
            WIFI.ShellCore Shell = new WIFI.ShellCore(new IntegratedSocket("", 23));
            // When disconnected, we want to start listening again
            Shell.OnDisconnected += new WIFI.ShellCore.ConnectionStateChange(Shell_OnDisconnected);

            // Lets bind to the authorization provider (optional, but useful ;-))
            WIFI.Auth LoginModule = new WIFI.Auth(Shell);
            LoginModule.OnAuthorize += new WIFI.Auth.IsAuthorized(Auth_OnAuthorize);

            // Lets bind some more apps
            WIFI.ShellCommands.Bind(Shell); // Some basic shell commands like MOTD, CLS, etc.

            // We start the shell
            Shell.Start();
        }

        // Triggered when the connection has been lost
        static void Shell_OnDisconnected(WIFI.ShellCore Shell, string RemoteAddress, DateTime Time)
        {
            Thread.Sleep(1000);
            // Starts to listen again
            Shell.Start();
        }

        // Asks if a user is authorized
        static bool Auth_OnAuthorize(WIFI.ShellCore Shell, string Username, string Password, string RemoteAddress)
        {
            if (Username == "gene" && Password == "LeGrandFromage")
                return true;
            if (Username == "wayne" && Password == "CodeMonkey")
                return true;

            Shell.TelnetServer.Print("Answer correctly or you will be assimilated! :-)");
            return false;
        }

    }
}