src/ch/epfl/maze/physical/stragegies/picker/RandomPicker.java


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package ch.epfl.maze.physical.stragegies.picker;

import ch.epfl.maze.util.Direction;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Set;

/**
 * A probabilistic decision maker.
 *
 * @author Pacien TRAN-GIRARD
 */
public interface RandomPicker extends BlindPicker {

    Random RANDOM_SOURCE = new Random();

    @Override
    default Direction pick(Set<Direction> choices) {
        if (choices.isEmpty()) return FALLBACK_DIRECTION;

        List<Direction> choiceList = new ArrayList<>(choices);
        return choiceList.get(RANDOM_SOURCE.nextInt(choices.size()));
    }

}