/*
 * Copyright (c) 2012 Socialize Inc.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.socialize.notifications;

import android.content.Context;
import android.os.PowerManager;

/**
 * @author Jason Polites
 *
 */
public class WakeLock {

	private static final String WAKELOCK_KEY = "C2DM_LIB";
	
	private static final WakeLock instance = new WakeLock();
	
	private PowerManager.WakeLock mWakeLock;
	
	public static final WakeLock getInstance() {
		return instance;
	}
	
	public boolean acquire(Context context) {
		try {
			if (mWakeLock == null) {
				// If this is called from BroadcastReceiver, there is no init.
				PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
				mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, WAKELOCK_KEY);
			}
			
			if(!mWakeLock.isHeld()) {
				mWakeLock.acquire();
				
				return true;
			}
		} 
		catch (Exception ignore) {}
		
		return false;
	}
	
	public boolean release(Context context) {
		try {
			if(mWakeLock != null && mWakeLock.isHeld()) {
				mWakeLock.release();
				return true;
			}
		} 
		catch (Exception ignore) {}
		
		return false;
	}
}