/*
 * 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.location;

import android.app.Activity;
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import com.socialize.android.ioc.IBeanFactory;
import com.socialize.config.SocializeConfig;
import com.socialize.log.SocializeLogger;
import com.socialize.util.AppUtils;
import com.socialize.util.StringUtils;

/**
 * @author Jason Polites
 */
public class DefaultLocationProvider implements SocializeLocationProvider {

	private AppUtils appUtils;
	private Location location;
	private SocializeLocationManager locationManager;
	private IBeanFactory<SocializeLocationListener> locationListenerFactory;
	private SocializeLocationListener listener = null;
	private SocializeLogger logger;
	private SocializeConfig config;
	
	public DefaultLocationProvider() {
		super();
	}
	
	public void init(Context context) {
		if(locationListenerFactory != null) {
			listener = locationListenerFactory.getBean();
		}
		getLocation(context);
	}
	
	public void destroy() {
		stop();
	}
	
	@Override
	public void pause(Context context) {
		stop();
	}

	@Override
	public void resume(Context context) {
		getLocation(context);
	}

	public void stop() {
		if(logger != null && logger.isDebugEnabled()) {
			logger.debug("LocationProvider ceasing location updates");
		}				
		if(locationManager != null && listener != null) {
			locationManager.removeUpdates(listener);
		}
	}
	
	@Override
	public Location getLastKnownLocation() {
		return location;
	}

	@Override
	public Location getLocation(Context context) {
		if(config != null && config.getBooleanProperty(SocializeConfig.SOCIALIZE_LOCATION_ENABLED, true)) {
			if(location == null) {
				if(appUtils.hasPermission(context, "android.permission.ACCESS_FINE_LOCATION")) {
					requestLocation(context, Criteria.ACCURACY_FINE);
				}
				else if(appUtils.hasPermission(context, "android.permission.ACCESS_COARSE_LOCATION")) {
					requestLocation(context, Criteria.ACCURACY_COARSE);
				}
			}
			else if(logger != null && logger.isDebugEnabled()) {
				logger.debug("LocationProvider got location");
			}
		}

		return location;
	}

	protected void requestLocation(Context context, int accuracy) {
		
		if(logger != null && logger.isDebugEnabled()) {
			logger.debug("LocationProvider Requesting location...");
		}
		
		Criteria criteria = new Criteria();
		criteria.setAccuracy(accuracy);
		
		String provider = locationManager.getBestProvider(criteria, true);
		
		if(!StringUtils.isEmpty(provider)) {
			Location mostRecentLocation = locationManager.getLastKnownLocation(provider);
			
			if(mostRecentLocation != null) {
				
				if(logger != null && logger.isDebugEnabled()) {
					logger.debug("Got location from last known provider");
				}
				
				location = mostRecentLocation;
				locationManager.removeUpdates(listener);
			}
			else if(locationManager.isProviderEnabled(provider)) {
				
				if(listener != null) {
					if(logger != null && logger.isDebugEnabled()) {
						logger.debug("No last known location, requesting from device...");
					}
					
					if(context instanceof Activity) {
						locationManager.requestLocationUpdates((Activity) context, provider, 1, 0, listener);
					}
					else {
						if(logger != null && logger.isWarnEnabled()) {
							logger.warn("Cannot request location using a non-activity context");
						}
					}
				}
				else {
					if(logger != null && logger.isWarnEnabled()) {
						logger.warn("No listener specified for location callback");
					}
				}
			}
			else {
				if(logger != null && logger.isWarnEnabled()) {
					logger.warn("Location provider [" +
							provider +
							"] is not enabled");
				}
			}
		}
		else {
			if(logger != null && logger.isWarnEnabled()) {
				logger.warn("No provider found to determine location based on accuracy [" +
						accuracy +
						"].  Check that location is enabled in the device and location permissions set on the app");
			}
		}
	}

	public void setAppUtils(AppUtils appUtils) {
		this.appUtils = appUtils;
	}

	public void setLocationManager(SocializeLocationManager locationManager) {
		this.locationManager = locationManager;
	}

	protected SocializeLocationManager getLocationManager() {
		return locationManager;
	}

	protected void setLocation(Location location) {
		this.location = location;
	}

	public void setLocationListenerFactory(IBeanFactory<SocializeLocationListener> listenerFactory) {
		this.locationListenerFactory = listenerFactory;
	}

	public void setLogger(SocializeLogger logger) {
		this.logger = logger;
	}
	
	public void setConfig(SocializeConfig config) {
		this.config = config;
	}
}