import java.awt.event.*;

import com.genuts.gameui.*;

/**
 * Control the robot with keyboard keys.
 */
public class RobotControler extends SpriteWrapper implements KeyListener {

  private static int GOLEFT = 1<<0;
  private static int GORIGHT = 1<<1;
  private static int GOUP = 1<<2;

  private int keyAction = 0;

  public RobotControler(DummyRobot robot) {
    super(robot);
  }

  /**
   * Adds this KeyListener to the playfield
   */
  protected void setParent(PlayField parent) {
    if (getParent() != null) {
      getParent().removeKeyListener(this);
    }
    super.setParent(parent);
    if (parent != null) {
      parent.addKeyListener(this);
    }
  }

  /**
   * Transmit vertical speed of the robot
   */
  public int getVerticalSpeed() {
    return ((DummyRobot) getActionSprite()).getVerticalSpeed();
  }

  /**
   * Transmit horizontal speed of the robot
   */
  public int getHorizontalSpeed() {
    return ((DummyRobot) getActionSprite()).getHorizontalSpeed();
  }

  /**
   * Transmit if the robot is flying
   */
  public boolean isFlying() {
    return ((DummyRobot) getActionSprite()).isFlying();
  }

  ////////////////////////////////////////
  /////  KeyListener  ////////////////////
  ////////////////////////////////////////
  public void keyTyped(KeyEvent e) {
  }

  public void keyPressed(KeyEvent e) {
    switch (e.getKeyCode()) {
    case KeyEvent.VK_LEFT:
      keyAction &= ~GORIGHT;
      keyAction |= GOLEFT;
      ((DummyRobot) getActionSprite()).goLeft();
      break;
    case KeyEvent.VK_RIGHT:
      keyAction &= ~GOLEFT;
      keyAction |= GORIGHT;
      ((DummyRobot) getActionSprite()).goRight();
      break;
    case KeyEvent.VK_UP:
      keyAction |= GOUP;
      ((DummyRobot) getActionSprite()).flyUp();
      break;
    }
  }

  public void keyReleased(KeyEvent e) {
    switch (e.getKeyCode()) {
    case KeyEvent.VK_LEFT:
      keyAction &= ~GOLEFT;
      if ((keyAction & GORIGHT) == 0) {
	((DummyRobot) getActionSprite()).stopWalking();
      }
      break;
    case KeyEvent.VK_RIGHT:
      keyAction &= ~GORIGHT;
      if ((keyAction & GOLEFT) == 0) {
	((DummyRobot) getActionSprite()).stopWalking();
      }
     break;
    case KeyEvent.VK_UP:
      keyAction &= ~GOUP;
      ((DummyRobot) getActionSprite()).stopFlying();
      break;
    }
  }
}