package ch.epfl.maze.tests;

import ch.epfl.maze.graphics.Display;
import ch.epfl.maze.physical.Animal;
import ch.epfl.maze.physical.Daedalus;
import ch.epfl.maze.physical.Prey;
import ch.epfl.maze.physical.pacman.Blinky;
import ch.epfl.maze.physical.pacman.Clyde;
import ch.epfl.maze.physical.pacman.Inky;
import ch.epfl.maze.physical.pacman.Pinky;
import ch.epfl.maze.simulation.DaedalusSimulation;
import ch.epfl.maze.simulation.Simulation;
import ch.epfl.maze.util.Direction;
import ch.epfl.maze.util.LabyrinthGenerator;
import ch.epfl.maze.util.Vector2D;
import junit.framework.TestCase;
import org.junit.Test;

import java.util.Set;

/**
 * Test suite for ghosts implementation.
 *
 * @author EPFL
 * @author Pacien TRAN-GIRARD
 */
public class GhostsTest extends TestCase {

    public static final boolean DEBUG = false;

    /**
     * Tests the behavior of Blinky.
     * <p>
     * In this case, Blinky should go straight to the PacMan's position.
     */
    @Test
    public void testBlinky() {
        int[][] labyrinth = LabyrinthGenerator.getDebugBlinky();

        Daedalus d = new Daedalus(labyrinth);
        Simulation simulation = new DaedalusSimulation(d);

        d.addPredator(new Blinky(new Vector2D(6, 1)));
        d.addPrey(new PacMan(new Vector2D(1, 5), false));

        Display display = new Display(simulation);
        display.setDebug(GhostsTest.DEBUG);
        display.run();
    }

    /**
     * Tests the behavior of Pinky.
     * <p>
     * In this case, Pinky should go back and forth.
     */
    @Test
    public void testPinky() {
        int[][] labyrinth = LabyrinthGenerator.getDebugPinky();

        Daedalus d = new Daedalus(labyrinth);
        Simulation simulation = new DaedalusSimulation(d);

        d.addPredator(new Pinky(new Vector2D(1, 1)));
        d.addPrey(new PacMan(new Vector2D(6, 3), true));

        Display display = new Display(simulation);
        display.setDebug(GhostsTest.DEBUG);
        display.run();
    }

    /**
     * Tests the behavior of Inky.
     * <p>
     * In this case, Inky should target the red tile of the labyrinth.
     */
    @Test
    public void testInky() {
        int[][] labyrinth = LabyrinthGenerator.getDebugInky();

        Daedalus d = new Daedalus(labyrinth);
        Simulation simulation = new DaedalusSimulation(d);

        d.addPredator(new Inky(new Vector2D(9, 9)));
        d.addPredator(new Blinky(new Vector2D(7, 7)));
        d.addPrey(new PacMan(new Vector2D(5, 5), false));

        Display display = new Display(simulation);
        display.setDebug(GhostsTest.DEBUG);
        display.run();
    }

    /**
     * Tests the behavior of Clyde.
     * <p>
     * In this case, Clyde should go back and forth.
     */
    @Test
    public void testClyde() {
        int[][] labyrinth = LabyrinthGenerator.getDebugClyde();

        Daedalus d = new Daedalus(labyrinth);
        Simulation simulation = new DaedalusSimulation(d);

        d.addPredator(new Clyde(new Vector2D(1, 3)));
        d.addPrey(new PacMan(new Vector2D(8, 3), false));

        Display display = new Display(simulation);
        display.setDebug(GhostsTest.DEBUG);
        display.run();
    }

    /**
     * Mock class to create a dummy PacMan in our testing unit.
     */
    private class PacMan extends Prey {

        private boolean mMoves;

        /**
         * Constructs a dummy PacMan that can move back and forth.
         *
         * @param position Starting position of PacMan in the labyrinth
         * @param moves    Determines if the dummy PacMan will move back and forth
         */
        public PacMan(Vector2D position, boolean moves) {
            super(position);
            mMoves = moves;
        }

        @Override
        public Direction move(Set<Direction> choices, Daedalus daedalus) {
            if (mMoves) {
                return getPosition().getX() % 2 == 0 ? Direction.RIGHT : Direction.LEFT;
            }
            return Direction.NONE;
        }

        @Override
        public Animal copy() {
            return new PacMan(getPosition(), mMoves);
        }
    }

}