import java.util.*;
import javax.swing.ImageIcon;

public class Knight extends Piece {
  static int[] xDir = {-1, -2, -2, -1, 1, 2, 2, 1};
  static int[] yDir = {-2, -1, 1, 2, 2, 1, -1, -2};

  public Knight(int x, int y, String color) {
    super(x, y, color, new ImageIcon("sprites/" + color + "/knight.png").getImage());
  }

  public ArrayList<Position> getLegalMoves(Board board) {
    ArrayList<Position> positions = new ArrayList<Position>();

    for (int i = 0; i < xDir.length; i++) {
      int xPlus = xDir[i];
      int yPlus = yDir[i];
      Position test = new Position(pos.x + xPlus, pos.y + yPlus);
      if (!Board.inBounds(test)) continue;
      if (board.isOpen(test)) {
        positions.add(test);
        continue;
      }
      if (!board.getPiece(test).colorMatches(this)) {
        positions.add(test);
      }
    }

    return positions;
  }
}