/**
 * 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.otp.graph;

import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;

import org.onebusaway.gtfs.model.AgencyAndId;
import org.onebusaway.transit_data_federation.impl.otp.GraphContext;
import org.onebusaway.transit_data_federation.services.transit_graph.StopEntry;
import org.opentripplanner.routing.core.Edge;
import org.opentripplanner.routing.core.HasEdges;
import org.opentripplanner.routing.core.Vertex;

public final class ArrivalVertex extends AbstractVertexWithEdges implements
    HasStopTransitVertex {

  private static DateFormat _format = DateFormat.getDateTimeInstance(
      DateFormat.SHORT, DateFormat.SHORT);

  private final StopEntry _stop;

  private final long _time;

  public ArrivalVertex(GraphContext context, StopEntry stop, long time) {
    super(context);
    _stop = stop;
    _time = time;
  }

  @Override
  public StopEntry getStop() {
    return _stop;
  }

  /****
   * {@link Vertex} Interface
   ****/

  @Override
  public String getLabel() {
    return "stop_arrival_" + getStopId() + "_wait_" + _time;
  }

  @Override
  public AgencyAndId getStopId() {
    return _stop.getId();
  }

  @Override
  public double getX() {
    return _stop.getStopLon();
  }

  @Override
  public double getY() {
    return _stop.getStopLat();
  }

  /****
   * {@link HasEdges} Interface
   ****/

  @Override
  public Collection<Edge> getIncoming() {
    List<Edge> edges = new ArrayList<Edge>(1);
    // We could come from a different bus (arrival)
    edges.add(new ArrivalReverseEdge(_context, _stop));
    return edges;
  }

  @Override
  public Collection<Edge> getOutgoing() {
    List<Edge> edges = new ArrayList<Edge>(1);
    // We stop waiting and move back to the street
    edges.add(new WaitingEndsAtStopEdge(_context, _stop, false));
    return edges;
  }

  /****
   * {@link Object} Interface
   ****/

  @Override
  public String toString() {
    return "ArrivalVertex(stop=" + _stop.getId() + " time="
        + _format.format(new Date(_time)) + ")";
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((_stop == null) ? 0 : _stop.hashCode());
    result = prime * result + (int) (_time ^ (_time >>> 32));
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    ArrivalVertex other = (ArrivalVertex) obj;
    return _stop.equals(other._stop) && _time == other._time;
  }
}