/*----------------------------------------------------------------------------
  File: NESW.java
  ----------------------------------------------------------------------------*/

import  java.util.Vector;

/**
 * The NESW mouse will use a strategy that moves in the order of North
 * East South West.  Because it is derived from the base class Smarty,
 * it has a memory.
 *
 * @version 1.0 11/11/2000
 *
 * @author Andrew Bridges ... Copyright (c) 2001
 * */

public class NESW extends Smarty
{

  //////////////////////////////////////////////////////////////////////////////
  // makeAMove /////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////////

  /**
   * For each turn the makeAMove method is called.  The NESW mouse
   * will use a strategy that moves in the order of North East South
   * West.
   * 
   * @return the direction that we should move.
   * */

  protected Direction makeAMove()
  {

    /*------------------------------------------------------------------------
      1. This mouses strategy (NESW) will use a specific order to turn.
      ------------------------------------------------------------------------*/

    if (passagewayOpenAt(Direction.North))
      return Direction.North;

    if (passagewayOpenAt(Direction.East))
      return Direction.East;

    if (passagewayOpenAt(Direction.South))
      return Direction.South;

    if (passagewayOpenAt(Direction.West))
      return Direction.West;


    /*------------------------------------------------------------------------
      2. If all the passagways are closed then you retreat.
      ------------------------------------------------------------------------*/

    return Direction.Retreat;


    /*------------------------------------------------------------------------
      Processing End (makeAMove)
      ------------------------------------------------------------------------*/

  }

} // end of ... NESW class definition