/**
 * Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.onebusaway.transit_data_federation.impl;

import org.onebusaway.geospatial.model.CoordinatePoint;
import org.onebusaway.geospatial.model.XYPoint;
import org.onebusaway.geospatial.services.UTMLibrary;
import org.onebusaway.geospatial.services.UTMProjection;
import org.onebusaway.transit_data_federation.model.ProjectedPoint;

public class ProjectedPointFactory {

  public static ProjectedPoint forward(double lat, double lon) {
    return forward(new CoordinatePoint(lat, lon));
  }

  public static ProjectedPoint forward(CoordinatePoint latlon) {
    int zone = UTMLibrary.getUTMZoneForLongitude(latlon.getLon());
    return forward(latlon, zone);
  }

  public static ProjectedPoint forward(CoordinatePoint latlon, int zone) {
    UTMProjection projection = new UTMProjection(zone);
    XYPoint point = projection.forward(latlon);
    return new ProjectedPoint(latlon.getLat(), latlon.getLon(), point.getX(),
        point.getY(), zone);
  }

  public static ProjectedPoint ensureSrid(ProjectedPoint point, int srid) {
    if (srid == point.getSrid())
      return point;
    return forward(point.toCoordinatePoint(), srid);
  }

  public static ProjectedPoint reverse(double x, double y, int srid) {
    UTMProjection projection = new UTMProjection(srid);
    XYPoint p = new XYPoint(x, y);
    CoordinatePoint latlon = projection.reverse(p);
    return new ProjectedPoint(latlon.getLat(), latlon.getLon(), x, y, srid);
  }
}