import java.awt.*;

public class King extends ChessPiece
{
    public King (int c, Image p, Component l)
    {
	super (c, p, l);

    }

    public boolean legalMove (ChessBoard cb, int x, int y)
    {
	int dist = moveDistance (x, y);
	if (dist == 1) {
	    return (legalCapture (cb, x, y) >= 0 &&
		(moveStraight (x, y) || moveDiagonally (x, y)));
	} else {
	    //can I castle?
	    if (dist != 2 || hasMoved || !moveStraight (x, y)
		|| moveForward (x, y) || legalCapture (cb, x, y) != 0
		|| moveBlocked (cb, x, y)) {
		return false;
	    } else {
		//king can castle and path is clear; now, which side do we
		//castle on? can the rook move?
		final int LEFT = 0, RIGHT = 1;
		int whichSide = x < squareX ? LEFT : RIGHT;
		ChessPiece atRooks;
		if (whichSide == LEFT)
		    atRooks = cb.getPieceAt (0, y);
		else
		    atRooks = cb.getPieceAt (7, y);
		if (atRooks == null || atRooks.hasMoved) {
		    return false;
		} else {
		    //The rook is in the correct position and it hasn't moved.
		    //Now determine whether we can really castle, and do it.
		    if (cb.getPieceAt (whichSide == LEFT ? 1 : 6, y) == null) {
			//castle!
			cb.placePiece (atRooks, whichSide == LEFT ? x+1 : x-1, y);
			return true;
		    } else return false;
		}
	    }
	}
    }
}