package edu.ucla.iBeaconNav;

import java.util.List;
import java.util.LinkedList;
import java.util.Collection;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

import android.app.Notification;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.IBinder;
import android.os.Looper;
import android.os.Messenger;
import android.os.RemoteException;
import android.preference.PreferenceManager;

import com.radiusnetworks.ibeacon.*;
import com.radiusnetworks.ibeacon.client.*;
import com.radiusnetworks.ibeacon.service.*;

public class Task extends Service implements IBeaconConsumer, RangeNotifier, MonitorNotifier
{
	/* Main -> Task Messsages */
	static enum Command {
		REGISTER,
		CONNECT,
		DISCONNECT,
	};

	/* Task -> Main messages */
	static enum Response {
		POSITION,
		NOTIFY,
	};

	/* Private data */
	private Messenger      messenger;
	private IBeaconManager ibeacon;

	/* Private methods */
	private void tellMain(Response cmd, Object value)
	{
		try {
			android.os.Message msg = android.os.Message.obtain();
			msg.what = cmd.ordinal();
			msg.obj  = value;
			this.messenger.send(msg);
		} catch (Exception e) {
			Util.debug("Task: error sending message", e);
		}
	}

	private void notify(String text, int icon)
	{
		// Notify Main
		this.tellMain(Task.Response.NOTIFY, text);

		// Notification bar
		//Notification  note   = new Notification(icon, null, 0);
		//Intent        intent = new Intent(this, Main.class);
		//PendingIntent pend   = PendingIntent.getActivity(this, 0, intent, 0);
		//note.setLatestEventInfo(this, "iBeaconNav!", text, pend);
		//PendingIntent pend = PendingIntent.getActivity(this, 0, intent, 0);

		Notification  note = new Notification.Builder(this)
			.setContentTitle("iBeaconNav!")
			.setContentText("iBeaconNav!")
			.setSmallIcon(icon)
			.build();

		this.startForeground(1, note);
	}

	private void handle(Command cmd, Messenger mgr)
	{
		// Validate messenger
		if (cmd != Task.Command.REGISTER && mgr != null && mgr != this.messenger)
			Util.debug("Task: handle - invalid messenger");

		// Handle the command
		switch (cmd) {
			// Setup communication with Main
			case REGISTER:
				Util.debug("Task: handle - register");
				this.messenger = mgr;
				break;

			// Create client thread
			case CONNECT:
				Util.debug("Task: handle - connect");
				this.notify("Connected", android.R.drawable.presence_online);
				this.ibeacon = IBeaconManager.getInstanceForApplication(this);
				this.ibeacon.bind(this);
				//this.ibeacon.setBackgroundMode(this, false);
				break;

			// Stop client thread
			case DISCONNECT:
				Util.debug("Task: handle - register");
				//this.ibeacon.setBackgroundMode(this, true);
				this.ibeacon.unBind(this);
				this.ibeacon = null;
				this.stopForeground(true);
				break;
		}
	}

	/* Public methods */
	public boolean isRunning()
	{
		return this.ibeacon != null;
	}

	/* Service Methods */
	@Override
	public void onCreate()
	{
		Util.debug("Task: onCreate");
		super.onCreate();
		IBeaconManager.LOG_DEBUG = true;
	}

	@Override
	public void onDestroy()
	{
		Util.debug("Task: onDestroy");
		super.onDestroy();
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId)
	{
		Util.debug("Task: onStartCommand");
		int       rval = super.onStartCommand(intent, flags, startId);
		Command   cmd  =   (Command)intent.getExtras().get("Command");
		Messenger mgr  = (Messenger)intent.getExtras().get("Messenger");
		this.handle(cmd, mgr);
		return rval;
	}

	@Override
	public IBinder onBind(Intent intent)
	{
		Util.debug("Task: onBind");
		return null;
	}

	/* IBeaconConsumer Methods */
	@Override
	public void onIBeaconServiceConnect() {
		Util.debug("Task: onIBeaconServiceConnect");

		this.ibeacon.setRangeNotifier(this);
		this.ibeacon.setMonitorNotifier(this);

		try {
			Region region = new Region("iBeaconNavMonitoringId", null, null, null);
			this.ibeacon.startRangingBeaconsInRegion(region);
			this.ibeacon.startMonitoringBeaconsInRegion(region);
		} catch (RemoteException e) {
			Util.debug("Task: onIBeaconServiceConnect - error");
		}
	}

	/* RangeNotifier Methods */
        @Override
        public void didRangeBeaconsInRegion(Collection<IBeacon> iBeacons, Region region) {
		Util.debug("Task: didRangeBeaconsInRegion");
        }

	/* MonitorNotifier Methods */
	@Override
	public void didEnterRegion(Region region) {
		Util.debug("Task: didEnterRegion");
	}

	@Override
	public void didExitRegion(Region region) {
		Util.debug("Task: didExitRegion");
	}

	@Override
	public void didDetermineStateForRegion(int state, Region region) {
		Util.debug("Task: didDetermineStateForRegion");
	}
}