package dk.thoerup.traininfo;

import java.util.List;

import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;


public class LocationLookup implements LocationListener{

	LocationManager locManager;
	Context cntx;
	Handler hndl;

	Location savedLocation = null;
	
	boolean isSearching = false;
	boolean hasGps;

	public LocationLookup(Context c, Handler h) {
		cntx = c;
		hndl = h;
	}
	
	
	public boolean hasLocation() {
		return savedLocation != null;
	}
	
	public Location getLocation()
	{
		return savedLocation;
	}

	public void locateStations() {
		
		isSearching = true;
		
		hasGps = false;
		locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);

		List<String> providers = locManager.getProviders(true);		
		
		if (providers.size() > 0) {
			for(String provider : providers) {
				Log.i("Provider", ""+provider);
				if (provider.equalsIgnoreCase("gps"))
					hasGps = true;
				locManager.requestLocationUpdates(provider, 0, 0, this);
			}
		} else {
			// message that no suitable provider was found
			hndl.sendEmptyMessage(StationList.NOPROVIDER);
		}
	}
	@Override
	public void onLocationChanged(Location location) {
		if (isSearching == false)
			return;
		
		Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
		

		if (savedLocation == null || location.getAccuracy() < savedLocation.getAccuracy())
			savedLocation = new Location(location); //save a copy
		
		if (hasGps) {
			if (!location.getProvider().equals("gps")) {
				return; // at least give the gps a chance
			} else if (location.getAccuracy() > 256) {
				return; //if we have a gps provider lets wait for a more precise fix
			}

		}
		stopSearch();
		hndl.sendEmptyMessage(StationList.GOTLOCATION);
	}
	
	public void stopSearch()
	{
		if (isSearching) {
			isSearching = false;
			locManager.removeUpdates(this);
		}
	}


	@Override
	public void onProviderDisabled(String provider) {
	}


	@Override
	public void onProviderEnabled(String provider) {
	}


	@Override
	public void onStatusChanged(String provider, int status, Bundle extras) {
		// TODO Auto-generated method stub

	}
	

	public static void injectMockLocation(Context cntx) {
		Location odder = new Location("gps2"); 
		odder.setLatitude(55.976632);
		odder.setLongitude(10.16407);
		
		Location kbh = new Location("gps2"); //Christiansborg 55.675092,12.578573
		kbh.setLatitude(55.675092);
		kbh.setLongitude(12.578573);
		
		Location bjbro = new Location("gps2");
		bjbro.setLatitude(56.380745);
		bjbro.setLongitude(9.655609);
		
		Location hillerod = new Location("gps");
		hillerod.setLatitude(55.929177);
		hillerod.setLongitude(12.308095);
		
		Location aarhus = new Location("gps"); //Aros
		aarhus.setLatitude(56.153828);
		aarhus.setLongitude(10.200369);
		
		
		
		LocationManager lm = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
		if (lm.getProvider("gps2") == null)
			lm.addTestProvider("gps2", false, true, true, false, false, false, false, 0, Criteria.ACCURACY_FINE );
		lm.setTestProviderEnabled("gps2", true);
		lm.setTestProviderLocation("gps2", kbh);
	}
	
	public static void removeMockLocation(Context cntx) {
		LocationManager lm = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
		if (lm.getProvider("gps2") != null)
			lm.removeTestProvider("gps2");
	}
}