package de.swingbe.grb_use;

import org.onebusway.gtfs_realtime.exporter.GtfsRealtimeLibrary;
import org.onebusway.gtfs_realtime.exporter.GtfsRealtimeMutableProvider;

import com.google.transit.realtime.GtfsRealtime.FeedEntity;
import com.google.transit.realtime.GtfsRealtime.FeedMessage;
import com.google.transit.realtime.GtfsRealtime.Position;
import com.google.transit.realtime.GtfsRealtime.VehiclePosition;
import com.google.transit.realtime.GtfsRealtime.TripDescriptor;
import com.google.transit.realtime.GtfsRealtime.VehicleDescriptor;

public class Main {

    private static GtfsRealtimeMutableProvider gtfsRealtimeMutableProvider;

    public static void main(String[] args) {
        System.out.println("main() started...");
        //GtfsRealtime.FeedMessage msg;
        FeedMessage.Builder vehiclePositions = GtfsRealtimeLibrary.createFeedMessageBuilder();

        /**
         * We construct a TripDescriptor and VehicleDescriptor, which will be used
         * in both trip updates and vehicle positions to identify the trip and
         * vehicle. Ideally, we would have a trip id to use for the trip
         * descriptor, but the SEPTA api doesn't include it, so we settle for a
         * route id instead.
         */
        TripDescriptor.Builder tripDescriptor = TripDescriptor.newBuilder();
        tripDescriptor.setRouteId("tripDescriptor:RouteId");

        VehicleDescriptor.Builder vehicleDescriptor = VehicleDescriptor.newBuilder();
        vehicleDescriptor.setId("vehicleDescriptor:Id");

        /**
         * To construct our VehiclePosition, we create a position for the vehicle.
         * We add the position to a VehiclePosition builder, along with the trip
         * and vehicle descriptors.
         */

        /**
         * Brunswick
         */
        double lat = 52.268875;
        double lon = 10.526770;

        Position.Builder position = Position.newBuilder();
        position.setLatitude((float) lat);
        position.setLongitude((float) lon);

        VehiclePosition.Builder vehiclePosition = VehiclePosition.newBuilder();
        vehiclePosition.setPosition(position);
        vehiclePosition.setTrip(tripDescriptor);
        vehiclePosition.setVehicle(vehicleDescriptor);

        /**
         * Create a new feed entity to wrap the vehicle position and add it to the
         * GTFS-realtime vehicle positions feed.
         */
        FeedEntity.Builder vehiclePositionEntity = FeedEntity.newBuilder();
        vehiclePositionEntity.setId("vehiclePositionEntity:Id");
        vehiclePositionEntity.setVehicle(vehiclePosition);
        vehiclePositions.addEntity(vehiclePositionEntity);

        /**
         * Build out the final GTFS-realtime feed messagse and save them.
         */
        gtfsRealtimeMutableProvider.setVehiclePositions(vehiclePositions.build());

        System.out.println("main() done.");
        return;
    }
}