using System;
using SafeMobileLib;
using System.ServiceProcess;
using SocketIOComponent;

namespace AppServer
{
	public class MainClass
	{

		public MulticastListener mListener;
		private RecordingsServer rServer;
		private MainForm parent;

		private String PostrgreSDService = "PostgreSD";
		private String TCPServerService = "TCPClientService";
		private String TCPClientService = "TCPServerService";
		DBsettingsManager dbSettingsManager;
		public static bool isGPSCheckboxChecked = false;

		/// <summary>
		/// Listens and sends request on Soket.IO
		/// </summary>
		private SocketIOClass _socketIOClass = null;

		public MainClass(MainForm _parent)
		{
			// start the postgreSD service just to be sure it is up and running
			if (GetStatus(PostrgreSDService) == ServiceStatus.STOPPED || GetStatus(PostrgreSDService) == ServiceStatus.STOPPING
				|| GetStatus(PostrgreSDService) == ServiceStatus.PAUSED || GetStatus(PostrgreSDService) == ServiceStatus.STATUS_CHANGING)
				ServiceControlUtils.startService(PostrgreSDService);


			// start the TCPServerService service just to be sure it is up and running
			if (GetStatus(TCPServerService) == ServiceStatus.STOPPED || GetStatus(TCPServerService) == ServiceStatus.STOPPING
				|| GetStatus(TCPServerService) == ServiceStatus.PAUSED || GetStatus(TCPServerService) == ServiceStatus.STATUS_CHANGING)
				ServiceControlUtils.startService(TCPServerService);



			// start the TCPClientService service just to be sure it is up and running
			if (GetStatus(TCPClientService) == ServiceStatus.STOPPED || GetStatus(TCPClientService) == ServiceStatus.STOPPING
				|| GetStatus(TCPClientService) == ServiceStatus.PAUSED || GetStatus(TCPClientService) == ServiceStatus.STATUS_CHANGING)
				ServiceControlUtils.startService(TCPClientService);


			string test = Environment.GetEnvironmentVariable("PGPASSWORD");
			if (test == null)
			{
				SM.Debug("Setting Postgress Enviroment password!!!");
				Environment.SetEnvironmentVariable("PGPASSWORD", "wizdemo26", EnvironmentVariableTarget.Machine);
			}

			rServer = new RecordingsServer();
			parent = _parent;
		}

		private static bool listenerAdded = false;
		public void Start()
		{
			Utils.WriteLine("START", ConsoleColor.DarkCyan);

			if (!listenerAdded)
			{
				mListener = new MulticastListener(Program.cfg.msgBusIP, Program.cfg.msgBusPort, parent);
				mListener.OnRefreshHashRequest += mListener_OnRefreshHashRequest;
				mListener.OnDatabaseDown += MListener_OnDatabaseDown;
				mListener.OnEmergencyAckReceived += MListener_OnEmergencyAckReceived;
				mListener.OnPollRequestReceived += MListener_OnPollRequestReceived;
				listenerAdded = true;
			}
			mListener?.Start();

			// Instantiate socketIOClass only if is null 
			// to prevent multiple socket io classes in case of Appserver restart

			// If Linx version, start listening on Socket.IO
			// Check if socket.IO server and port are saved in database
			dbSettingsManager = new DBsettingsManager(Program.cfg.DB_IP, Program.cfg.DB_schema, Program.cfg.DB_user, Program.cfg.DB_passwd, Program.cfg.DB_port);
			string linxServerIP = dbSettingsManager.getSettingValue(0, "lanLinxServer"); // sipServerIP
			string webServicePort = dbSettingsManager.getSettingValue(0, "lanSigPort"); //webServicePort

			string uri = $"ws://{linxServerIP}:{webServicePort}";
			if ((_socketIOClass != null && _socketIOClass.Uri != uri) || _socketIOClass == null)
			{
				Utils.WriteLine($"SocketIO on {linxServerIP}:{webServicePort}", ConsoleColor.DarkCyan);
				if (!string.IsNullOrEmpty(linxServerIP) && !string.IsNullOrEmpty(webServicePort))
				{
					System.Net.IPAddress linxIP = null;
					int socketIoPort = -1;
					if (System.Net.IPAddress.TryParse(linxServerIP, out linxIP) && int.TryParse(webServicePort, out socketIoPort))
					{
						_socketIOClass?.Disconect();
						_socketIOClass = new SocketIOClass(uri);
						_socketIOClass.ArsReceived += ArsReceivedOnSocketIO;
						_socketIOClass.GpsReceived += GpsReceivedOnSocketIO;
						_socketIOClass.PollReceived += PollResponseReceivedOnSocketIO;
						_socketIOClass.EmergencyReceived += EmergencyReceivedOnSocketIO;

					}

				}
			}
		}
		
		#region SocketIO class event handlers
		
		private void GpsReceivedOnSocketIO(object sender, GpsReceivedEventArgs e)
		{
			if (e.Gps == null || e.Gps.UserID == null)
				return;

			string radioID = "0";
			if (MulticastListener.MobileVehicleList.ContainsKey(e.Gps.UserID))
				radioID = (String)MulticastListener.MobileVehicleList[e.Gps.UserID];


			Utils.WriteLine($"GpsReceivedOnSocketIO - imei:{radioID}|sip:{e.Gps.SipID} [{e.Gps.Lat:0.0000},{e.Gps.Lng:0.0000}]", ConsoleColor.DarkGreen);

			// add location parameters to an array
			String[] toSendString = new String[4];
			toSendString[0] = e.Gps.UnitTime / 1000 + "";
			toSendString[1] = e.Gps.SpeedKmh + "";
			toSendString[2] = e.Gps.Lat + "";
			toSendString[3] = e.Gps.Lng + "";

			// create the location message
			byte[] data = createLocationMessage((int)MessageBusCmds.LocationReceived,
									 radioID.ToString(), toSendString);

			// add location to message bus
			MainForm.udp.Send(data, data.Length);
		}



		private void PollResponseReceivedOnSocketIO(object sender, GpsReceivedEventArgs e)
		{
			if (e.Gps == null || e.Gps.UserID == null)
				return;

			string radioID = "0";
			if (MulticastListener.MobileVehicleList.ContainsKey(e.Gps.UserID))
				radioID = (String)MulticastListener.MobileVehicleList[e.Gps.UserID];


			Utils.WriteLine($"PollResponseReceivedOnSocketIO - imei:{radioID}|sip:{e.Gps.SipID} [{e.Gps.Lat:0.0000},{e.Gps.Lng:0.0000}]", ConsoleColor.DarkGreen);

			// add location parameters to an array
			String[] toSendString = new String[4];
			toSendString[0] = e.Gps.UnitTime / 1000 + "";
			toSendString[1] = e.Gps.SpeedKmh + "";
			toSendString[2] = e.Gps.Lat + "";
			toSendString[3] = e.Gps.Lng + "";

			// create the location message
			byte[] data = createLocationMessage((int)MessageBusCmds.PollResponseReceived,
									 radioID.ToString(), toSendString);

			// add location to message bus
			MainForm.udp.Send(data, data.Length);
		}


		/// <summary>
		/// Create a Location Message that can be sent on message bus
		/// </summary>
		/// <param name="opCode">GPS Location operation code</param>
		/// <param name="suid">Radio id of the unit</param>
		/// <param name="dataString">Position data</param>
		/// <returns></returns>
		public static byte[] createLocationMessage(int opCode, string suid, String[] dataString)
		{
			string msg = "";
			msg = "#1." + (Utils.GetSecondsLocalFromDT(DateTime.Now)) + DateTime.Now.Millisecond.ToString() + "#" + opCode + "#" + suid + "#";
			msg = msg + dataString[0] + "#" + dataString[1] + "#" + dataString[2] + "#" + dataString[3];
			int totalSize = 5 + msg.Length;
			string sizeMsg = String.Format("#{0:000}", totalSize);
			msg = sizeMsg + msg;

			Byte[] toSendMulticast = new Byte[totalSize];
			System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
			Byte[] toSendMulticastPartial = encoding.GetBytes(msg);
			for (int i = 0; i < toSendMulticastPartial.Length; i++)
			{
				toSendMulticast[i] = toSendMulticastPartial[i];
			}
			toSendMulticast[totalSize - 1] = 35;

			return toSendMulticast;
		}
		

		/// <summary>
		/// Event handler for an emergency message received via SocketIO
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void EmergencyReceivedOnSocketIO(object sender, EmergencyReceivedEventArgs e)
		{
			if (e.Emergency == null || e.Emergency.UserID == null)
				return;

			Utils.WriteLine("EmergencyReceivedOnSocketIO " + e.Emergency.SipID, ConsoleColor.DarkGreen);

			string radioID = "0";
			if (e.Emergency.UserID == null)
				return;
			if (MulticastListener.MobileVehicleList.ContainsKey(e.Emergency.UserID))
				radioID = (String)MulticastListener.MobileVehicleList[e.Emergency.UserID];

			// handle the emergency received
			mListener?.onEmergencyReceivedHandler(e.Emergency.SequenceId, radioID, e.Emergency.EmergencyType, e.Emergency);

		}


		private void ArsReceivedOnSocketIO(object sender, ArsReceivedEventArgs e)
		{
			if (e.Ars == null || e.Ars.UserID == null)
				return;

			Utils.WriteLine("ArsReceivedOnSocketIO " + e.Ars.SipID, ConsoleColor.DarkGreen);
			// new ars received
			string radioID = "0";

			if (MulticastListener.MobileVehicleList.ContainsKey(e.Ars.UserID))
				radioID = (String)MulticastListener.MobileVehicleList[e.Ars.UserID];


			if (MainForm.VehicleHashStat[radioID] != null)
			{
				((VehicleStatus)MainForm.VehicleHashStat[radioID]).lastArsTime = DateTime.Now;

				// do not push any status update if the current status is emergency
				if (((VehicleStatus)MainForm.VehicleHashStat[radioID]).curentStatus == Status_for_tab.EMERG)
					return;

				DBsubsOperationManager dbsubsoperManage = new DBsubsOperationManager(Program.cfg.DB_IP, Program.cfg.DB_schema, Program.cfg.DB_user, Program.cfg.DB_passwd, Program.cfg.DB_port);

				dbsubsoperManage?.updateSUStatus(radioID, e.Ars.Ars ? 1 : 0);
				if (!e.Ars.Ars)
				{
					((VehicleStatus)MainForm.VehicleHashStat[radioID]).curentStatus = Status_for_tab.OFF;
					MulticastListener.PushStatus(radioID, Status_for_tab.OFF);
				}
				else
				{

					if (MainForm.VehStolen.ContainsKey(radioID) && (int)MainForm.VehStolen[radioID] == 1)
					{
						Utils.WriteLine("ARS received on SocketIO for a stolen vehicle " + radioID, ConsoleColor.Cyan);
					}

						((VehicleStatus)MainForm.VehicleHashStat[radioID]).curentStatus = Status_for_tab.ON;
					MulticastListener.PushStatus(radioID, Status_for_tab.ON);
				}
			}
			else
				mListener.dbuser.SetUserStateForSipID(Int32.Parse(e.Ars.SipID), e.Ars.Ars);            
		}

		#endregion

		/// <summary>
		/// Callback for when an emergency ack is received over the MessageBus
		/// </summary>
		/// <param name="seqID">Unique identifier for the emergency ack</param>
		/// <param name="radioID">The unit that needs to receive the emergency ack</param>
		private void MListener_OnEmergencyAckReceived(string seqID, string radioID)
		{
			String scId = "";
			String sipId = "";

			if (MainForm.VehList.ContainsKey(radioID))
			{
				scId = ((Vehicle_Data)MainForm.VehList[radioID]).sc_id + "";
				sipId = ((Vehicle_Data)MainForm.VehList[radioID]).sip_id + "";
			}

			EmergencyAckInfo emergAckInfo = new EmergencyAckInfo()
			{
				SequenceId = seqID,
				SipID = sipId,
				UserID = scId,
				WhoAckId = "0",
				WhoAckSipId = "0"
			};
			_socketIOClass?.SendEmergencyAck(emergAckInfo);
		}



		/// <summary>
		/// Callback for when a poll request is received over the MessageBus
		/// </summary>
		/// <param name="seqID">Unique identifier for the poll request</param>
		/// <param name="radioID">The unit that needs to receive the poll request</param>
		private void MListener_OnPollRequestReceived(string seqID, string radioID)
		{
			String scId = "";
			String sipId = "";


			if (!MainForm.VehList.ContainsKey(radioID))
				return;

			// do not continue to send the poll request over socketIO because the unit is not a mobile one
			if (((Vehicle_Data)MainForm.VehList[radioID]).type != 1)
				return;

			// get scId and sipId for required radioID
			scId = ((Vehicle_Data)MainForm.VehList[radioID]).sc_id + "";
			sipId = ((Vehicle_Data)MainForm.VehList[radioID]).sip_id + "";

			// pack the poll request
			PollRequestInfo pollReqInfo = new PollRequestInfo()
			{
				SequenceId = seqID,
				SipID = sipId,
				UserID = scId,
			};

			// send the request over the socketIO 
			_socketIOClass?.SendPollRequest(pollReqInfo);
		}
		
		private void MListener_OnDatabaseDown()
		{
			// DB is down 
			ServiceControlUtils.startService("PostgreSD");
		}


		void mListener_OnRefreshHashRequest()
		{
			Utils.WriteLine("DELEGATE ", ConsoleColor.Red);
			OnRefreshHashRequest?.Invoke();
			isGPSCheckboxChecked = IsGPSCheckboxChecked();


			try
			{
				DBemailServiceManager DB = new DBemailServiceManager(Program.cfg.DB_IP, Program.cfg.DB_schema, Program.cfg.DB_user, Program.cfg.DB_passwd, Program.cfg.DB_port);
			   
				Program.cfg.enableEmailService = DB.GetEmailServiceSettings().Enable;


				if (Program.cfg.enableEmailService)
				{
					SM.Debug("EmailService on");
				}

				else
				{
					SM.Debug("Email Service is not enabled");
				}
			}
			catch (Exception ex)
			{
				Utils.WriteLine("mListener_OnRefreshHashRequest error: " + ex.ToString(), ConsoleColor.DarkMagenta);
			}
		}


		public Boolean IsGPSCheckboxChecked()
		{
			try
			{
				string EmergencyOnly = dbSettingsManager.getSettingValue(0, DBsettingsManager.EMERGENCY_ONLY_KEY);

				if (EmergencyOnly.Trim().Equals("false") || EmergencyOnly.Trim().Equals(""))
				{
					return false;
				}
				else
				{
					return true;
				}
			}
			catch (Exception ex)
			{
				Utils.WriteLine("Error GPSCheckboxChecked: " + ex.ToString(), ConsoleColor.Red);
				return false;
			}

		}

		public enum ServiceStatus { RUNNING, STOPPED, PAUSED, STOPPING, STARTING, STATUS_CHANGING, NOT_INSTALLED };

		public static ServiceStatus GetStatus(string serviceName)
		{
			ServiceController sc = new ServiceController(serviceName);
			try
			{
				switch (sc.Status)
				{
					case ServiceControllerStatus.Running:
						return ServiceStatus.RUNNING;
					case ServiceControllerStatus.Stopped:
						return ServiceStatus.STOPPED;
					case ServiceControllerStatus.Paused:
						return ServiceStatus.PAUSED;
					case ServiceControllerStatus.StopPending:
						return ServiceStatus.STOPPING;
					case ServiceControllerStatus.StartPending:
						return ServiceStatus.STARTING;
					default:
						return ServiceStatus.STATUS_CHANGING;
				}
			}
			catch
			{
				return ServiceStatus.NOT_INSTALLED;
			}

		}
		
		public delegate void RefreshHashRequest();
		public event RefreshHashRequest OnRefreshHashRequest;
	}
}