package dev.kske.chess.board;

/**
 * Project: <strong>Chess</strong><br>
 * File: <strong>Castling.java</strong><br>
 * Created: <strong>2 Nov 2019</strong><br>
 *
 * @since Chess v0.5-alpha
 * @author Kai S. K. Engelbart
 */
public class Castling extends Move {

	private final Move rookMove;

	/**
	 * Creates a castling move.
	 *
	 * @param pos  the position of this castling move
	 * @param dest the destination of this castling move
	 */
	public Castling(Position pos, Position dest) {
		super(pos, dest);
		rookMove = dest.x == 6 ? new Move(7, pos.y, 5, pos.y)
			: new Move(0, pos.y, 3, pos.y);
	}

	/**
	 * Creates a castling move.
	 *
	 * @param xPos  the horizontal position of this castling move
	 * @param yPos  the vertical position of this castling move
	 * @param xDest the horizontal destination of this castling move
	 * @param yDest the vertical destination of this castling move
	 */
	public Castling(int xPos, int yPos, int xDest, int yDest) {
		this(new Position(xPos, yPos), new Position(xDest, yDest));
	}

	@Override
	public void execute(Board board) {
		// Move the king and the rook
		super.execute(board);
		rookMove.execute(board);
	}

	@Override
	public void revert(Board board, Piece capturedPiece) {
		// Move the king and the rook
		super.revert(board, capturedPiece);
		rookMove.revert(board, null);
	}

	/**
	 * @return {@code O-O-O} for a queenside castling or {@code O-O} for a
	 *         kingside
	 *         castling
	 */
	@Override
	public String toSAN(Board board) {
		return rookMove.pos.x == 0 ? "O-O-O" : "O-O";
	}
}