import java.io.File;

import com.graphhopper.GHRequest;
import com.graphhopper.GHResponse;
import com.graphhopper.GraphHopper;
import com.graphhopper.PathWrapper;
import com.graphhopper.reader.osm.GraphHopperOSM;
import com.graphhopper.routing.util.BikeFlagEncoder;
import com.graphhopper.routing.util.CarFlagEncoder;
import com.graphhopper.routing.util.EncodingManager;
import com.graphhopper.routing.util.FootFlagEncoder;
import com.graphhopper.storage.GraphHopperStorage;
import com.graphhopper.util.Parameters;
import com.graphhopper.util.StopWatch;

public class TestMapCreator {

	private static final String OSM_SOURCE_DIR = "/Users/victorshcherb/osmand/maps/gh/";
	private static final String OSM_FILE = "ukraine_kiev_europe.pbf";

	public static void main(String[] args) {
//		prepareFile();
		calculateRoute();
	}

	private static void calculateRoute() {
		GraphHopper hopper = new GraphHopper().forMobile();
		hopper.load(new File(OSM_SOURCE_DIR, getOSMFolderName()).getAbsolutePath());
		GHRequest req = new GHRequest(50.439296, 30.478347, 50.449700, 30.478776)
				.setAlgorithm(Parameters.Algorithms.DIJKSTRA_BI);
		req.getHints().put(Parameters.Routing.INSTRUCTIONS, "false");
		PathWrapper pw = calculateRoute(hopper, req);
		System.out.println(pw);
		GraphHopperStorage st = hopper.getGraphHopperStorage();
		System.out.println(st.toDetailsString());
		System.out.println(st.getEdges());
	}

	public static PathWrapper calculateRoute(GraphHopper hopper, GHRequest request) {
		if (hopper != null) {
			System.out.println("calculating path ...");
			float time;
			StopWatch sw = new StopWatch().start();
			GHResponse resp = hopper.route(request);
			time = sw.stop().getSeconds();
			if (!resp.hasErrors()) {
				System.out.println("from:" + request.getPoints().get(0).lat + "," + request.getPoints().get(0).lon
						+ " to:" + request.getPoints().get(request.getPoints().size() - 1).lat + ","
						+ request.getPoints().get(request.getPoints().size() - 1).lon + " found path with distance:"
						+ resp.getBest().getDistance() / 1000f + ", nodes:" + resp.getBest().getPoints().getSize()
						+ ", time:" + time + " " + resp.getDebugInfo());
				System.out.println("the route is " + (int) (resp.getBest().getDistance() / 100) / 10f + "km long, time:"
						+ resp.getBest().getTime() / 60000f + "min, debug:" + time);
			}
			return resp.getBest();
		} else {
			return null;
		}
	}

	private static String getOSMFolderName() {
		return OSM_FILE.substring(0, OSM_FILE.indexOf('.'));
	}

	public static void prepareFile() {
		GraphHopperOSM gh = new GraphHopperOSM();
		gh.setOSMFile(OSM_SOURCE_DIR + OSM_FILE).setStoreOnFlush(false);
		String output = OSM_SOURCE_DIR + getOSMFolderName();
		new File(output).mkdirs();
		gh.setGraphHopperLocation(output);
		gh.forDesktop();

		CarFlagEncoder carEncoder = new CarFlagEncoder();
		BikeFlagEncoder bikeEncoder = new BikeFlagEncoder();
		FootFlagEncoder footEncoder = new FootFlagEncoder();
		gh.setEncodingManager(new EncodingManager.Builder().add(carEncoder).add(bikeEncoder).add(footEncoder).build());
		gh.setAllowWrites(true);
		gh.setCHEnabled(true);
		gh.importAndClose();
	}


}