/* ownCloud Android client application
 *   Copyright (C) 2011  Bartek Przybylski
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package eu.alefzero.owncloud.location;

import android.app.ActivityManager;
import android.app.ActivityManager.RunningServiceInfo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.Log;

public class LocationServiceLauncherReciever extends BroadcastReceiver {

	private final String TAG = getClass().getSimpleName();
	
	@Override
	public void onReceive(Context context, Intent intent) {
		Intent deviceTrackingIntent = new Intent();
		deviceTrackingIntent.setAction("eu.alefzero.owncloud.location.LocationUpdateService");
		SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
		boolean trackDevice = preferences.getBoolean("enable_devicetracking", true);
		
		// Used in Preferences activity so that tracking is disabled or reenabled
		if(intent.hasExtra("TRACKING_SETTING")){
			trackDevice = intent.getBooleanExtra("TRACKING_SETTING", true);
		}
		
		startOrStopDeviceTracking(context, trackDevice);
	}
	
	/**
	 * Used internally. Starts or stops the device tracking service
	 * 
	 * @param trackDevice
	 *            true to start the service, false to stop it
	 */
	private void startOrStopDeviceTracking(Context context, boolean trackDevice) {
		Intent deviceTrackingIntent = new Intent();
		deviceTrackingIntent
				.setAction("eu.alefzero.owncloud.location.LocationUpdateService");
		if (!isDeviceTrackingServiceRunning(context) && trackDevice) {
			Log.d(TAG, "Starting device tracker service");
			context.startService(deviceTrackingIntent);
		} else if (isDeviceTrackingServiceRunning(context) && !trackDevice) {
			Log.d(TAG, "Stopping device tracker service");
			context.stopService(deviceTrackingIntent);
		}
	}
	
	/**
	 * Checks to see whether or not the LocationUpdateService is running
	 * 
	 * @return true, if it is. Otherwise false
	 */
	private boolean isDeviceTrackingServiceRunning(Context context) {
		ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
		for (RunningServiceInfo service : manager
				.getRunningServices(Integer.MAX_VALUE)) {
			if (getClass().getName().equals(service.service.getClassName())) {
				return true;
			}
		}
		return false;
	}

}