package dk.thoerup.traininfo;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONObject;

import dk.thoerup.traininfo.util.DownloadUtil;

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 StationLocator implements LocationListener{

	LocationManager locManager;
	Context cntx;
	Handler hndl;

	ArrayList<StationBean> stationList = new ArrayList<StationBean>();
	List<StationBean> safeStationList = java.util.Collections.unmodifiableList(stationList);

	public StationLocator(Context c, Handler h) {
		cntx = c;
		hndl = h;
	}
	
	public List<StationBean> getStations() {
		return safeStationList;
	}
	
	public void abortLocationListener() {
		locManager.removeUpdates(this);
	}

	public void locateStations() {
		//http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&lstkp=0&rsz=small&hl=en&source=gsc&gss=.com&sig=fadf0e8d483d0f70bea11d5905010a16&q=Train%20station&near=56.377424%2C9.656695&key=ABQIAAAA1XbMiDxx_BTCY2_FkPh06RRaGTYH6UMl8mADNa0YKuWNNa8VNxQEerTAUcfkyrr6OwBovxn7TDAH5Q&v=1.0&nocache=1249640467498

		locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
		/*//testcode
		List<String> provs = locManager.getAllProviders();
		for (String p  : provs) {
			Log.e("Provider", p);
		}
		provs = locManager.getProviders(true);
		for (String p  : provs) {
			Log.e("ActiveProvider", p);
		}
		*/
		Criteria c = new Criteria();
		c.setAccuracy(Criteria.ACCURACY_FINE);
		String bestProv = locManager.getBestProvider(c, true);
		Log.e("BestProvider", bestProv);

		if (bestProv != null) {
			locManager.requestLocationUpdates(bestProv, 0, 0, this);
		} else {
			// message that no suitable provider was found
			hndl.sendEmptyMessage(TrainInfoList.NOPROVIDER);
		}
	}
	@Override
	public void onLocationChanged(Location location) {
		Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());

		if (location.getProvider().equals("gps") && location.getAccuracy() > 100) //if we have a gps provider lets wait for a more precise fix
			return;

		locManager.removeUpdates(this);
		hndl.sendEmptyMessage(TrainInfoList.GOTLOCATION);
		
		//ToDo: to be nice put the api key into the request
		String urlSource = "http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&q=Train%20station&near=" + location.getLatitude() + "%2C" + location.getLongitude() + "&v=1.0";
		//String urlSource = "http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&q=Train%20station&near=56.2%2C9.0&v=1.0";

		try {
			String data = DownloadUtil.getContent(urlSource, 30000, "UTF-8");
			StringBuilder builder = new StringBuilder(data);

			while (builder.charAt(0) != '{')
				builder.deleteCharAt(0);
			while (builder.charAt(builder.length()-1) != '}')
				builder.deleteCharAt(builder.length()-1);

			JSONObject json = new JSONObject(builder.toString());
			// now have some fun with the results...
			JSONArray res = json.getJSONArray("results");

			Location tmpLocation = new Location("gps");
			stationList.clear();
			
			for (int i=0; i<res.length(); i++) {
				JSONObject jsonStation = res.getJSONObject(i);

				double lat = jsonStation.getDouble("lat");
				double lng = jsonStation.getDouble("lng");
				String title = jsonStation.getString("title");
				String addr = jsonStation.getString("streetAddress");
				tmpLocation.setLatitude(lat);
				tmpLocation.setLongitude(lng);

				float distance = location.distanceTo(tmpLocation);

				stationList.add( new StationBean(title,lat,lng,(int)distance,addr) );

				Log.e("Location", title + " " + lat +"," + lng);
			}
			hndl.sendEmptyMessage(TrainInfoList.GOTSTATIONLIST);

		} catch (Exception e) {
			Log.e("Location","Location",e);
			hndl.sendEmptyMessage(TrainInfoList.LOOKUPSTATIONFAILED);
		}
		
	}


	@Override
	public void onProviderDisabled(String provider) {
		// TODO Auto-generated method stub

	}


	@Override
	public void onProviderEnabled(String provider) {
		// TODO Auto-generated method stub

	}


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

	}
}