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package ch.epfl.maze.physical.pacman;
import ch.epfl.maze.physical.Animal;
import ch.epfl.maze.physical.Daedalus;
import ch.epfl.maze.physical.GhostPredator;
import ch.epfl.maze.util.Vector2D;
import java.util.NoSuchElementException;
/**
* Blue ghost from the Pac-Man game, targets the result of two times the vector
* from Blinky to its target.
*
* @author EPFL
* @author Pacien TRAN-GIRARD
*/
public class Inky extends GhostPredator {
private GhostPredator companion;
/**
* Finds Inky's best friend (Blinky) in the Daedalus.
*
* @param daedalus The Daedalus
* @return The companion if found, null otherwise
*/
private static GhostPredator findCompanion(Daedalus daedalus) {
try {
return (Blinky) daedalus
.getPredators()
.stream()
.filter(pred -> pred instanceof Blinky)
.findFirst()
.get();
} catch (NoSuchElementException e) {
return null;
}
}
/**
* Constructs a Inky with a starting position.
*
* @param position Starting position of Inky in the labyrinth
* @param companion Inky's accomplice
*/
public Inky(Vector2D position, GhostPredator companion) {
super(position);
this.companion = companion;
}
/**
* Constructs a Inky with a starting position.
*
* @param position Starting position of Inky in the labyrinth
*/
public Inky(Vector2D position) {
this(position, null);
}
/**
* Returns Inky's companion.
*
* @param daedalus The Daedalus
* @return Inky's companion if present, null otherwise
*/
private GhostPredator getCompanion(Daedalus daedalus) {
if (this.companion == null)
this.companion = Inky.findCompanion(daedalus);
return this.companion;
}
/**
* Returns Inky's companion's position.
*
* @param daedalus The Daedalus
* @return Inky's companion's position if present, null otherwise
*/
private Vector2D getCompanionPosition(Daedalus daedalus) {
GhostPredator companion = this.getCompanion(daedalus);
if (companion == null) return new Vector2D();
return companion.getPosition();
}
/**
* Targets beyond his friend's scope.
*
* @param daedalus The Daedalus
* @return The targeted position
*/
@Override
protected Vector2D getPreyTargetPosition(Daedalus daedalus) {
return this
.getPreyPosition(daedalus)
.mul(2)
.sub(this.getCompanionPosition(daedalus));
}
@Override
public Animal copy() {
return new Inky(this.getPosition());
}
}
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