/* Location.java */

/**
 *  This class implements a Location, which is a Point
 *   that also records the distance traveled to reach this Point.
 *  Locations are immutable.
 */
public class Location {
  /** Creates a new location initialized to illegal values, i.e., the 
   *   point  is (-1, -1) and the distance is -1.
   */
  public Location() {
    // PART II (a)  YOUR CODE GOES HERE
  }

  /** Creates a new location initialized to (pt, dist)
   */
  public Location( Point pt, int dist ) {
    // PART II (b)  YOUR CODE GOES HERE
  }

  /**
   *  Returns a new Location (p, d) such that
   *          'p' == "this" point moved by one in the
   *          direction 'dir', and the distance 'd' is
   *          updated.
   */
  public Location move( int dir ) {
    // PART II (c)  REMOVE THE FOLLOWING LINE
    //              AND INSERT YOUR CODE HERE
    return new Location();
  }

  /**
   *  Return the point in this location.
   */
  Point getPoint() {
    return point;
  }

  /**
   *  Return the distance in this location.
   */
  int getDistance() {
    return distance;
  }

  /**
   *   Return a string representation of the location.
   */
  public String toString() {
    return "[" + point.toString() + ", " + distance + "]";
  }

  // Data fields
  private Point point;    // the location of the point
  private int  distance;  // the distance traveled to get here
};