package ch.epfl.maze.physical;

import ch.epfl.maze.util.Direction;
import ch.epfl.maze.util.Vector2D;

import java.util.Arrays;
import java.util.EnumSet;
import java.util.Set;

/**
 * Prey that is killed by a predator when they meet each other in the labyrinth.
 *
 * @author EPFL
 * @author Pacien TRAN-GIRARD
 */
abstract public class Prey extends ProbabilisticAnimal {

    /**
     * Constructs a prey with a specified position.
     *
     * @param position Position of the prey in the labyrinth
     */
    public Prey(Vector2D position) {
        super(position);
    }

    /**
     * Retrieves the next direction of the animal, by selecting one choice among
     * the ones available from its position.
     * <p>
     * In this variation, the animal knows the world entirely. It can therefore
     * use the position of other animals in the daedalus to evade predators more
     * effectively.
     *
     * @param choices  The choices left to the animal at its current position (see
     *                 {@link ch.epfl.maze.physical.World#getChoices(Vector2D)
     *                 World.getChoices(Vector2D)})
     * @param daedalus The world in which the animal moves
     * @return The next direction of the animal, chosen in {@code choices}
     * @implNote Not abstract for compatibility purpose (in order not to break tests)
     */
    public Direction move(Set<Direction> choices, Daedalus daedalus) {
        return null;
    }

    /**
     * Retrieves the next direction of the animal, by selecting one choice among
     * the ones available from its position.
     * <p>
     * In this variation, the animal knows the world entirely. It can therefore
     * use the position of other animals in the daedalus to evade predators more
     * effectively.
     *
     * @param choices  The choices left to the animal at its current position (see
     *                 {@link ch.epfl.maze.physical.World#getChoices(Vector2D)
     *                 World.getChoices(Vector2D)})
     * @param daedalus The world in which the animal moves
     * @return The next direction of the animal, chosen in {@code choices}
     * @apiNote Not final for compatibility purpose (in order not to break tests)
     * @deprecated Use @code{Direction move(Set<Direction> choices, Daedalus daedalus)} instead
     */
    public Direction move(Direction[] choices, Daedalus daedalus) {
        return this.move(EnumSet.copyOf(Arrays.asList(choices)), daedalus);
    }

}