import objectdraw.*;

/**
 * Represents a full BullsEye
 */
public class BullsEyeRing implements BullsEyeInterface {

    private FramedOval outer; // outer ring of bullseye
    private BullsEyeInterface rest; // everything but outer ring

    // Create bullseye centered at pt with given radius
    public BullsEyeRing(Location pt, double radius, DrawingCanvas canvas) {

        // Create and center outer ring
        outer =
            new FramedOval(
                pt.getX() - radius,
                pt.getY() - radius,
                2.0 * radius,
                2.0 * radius,
                canvas);

        // Create smaller bullseye centered at same place
        radius = radius - RING_GAP;
        if (radius >= MIN_OUTER) {
            // Big enough to have more rings
            rest = new BullsEyeRing(pt, radius, canvas);
        } else {
            // Small enough so only center left
            rest = new BullsEyeCenter(pt, radius, canvas);
        }
    }

    // move the bullseye by dx in x direction and dy in y direction
    public void move(double dx, double dy) {
        outer.move(dx, dy);
        rest.move(dx, dy); // recursive call
    }

    // return whether the bullseye contains pt
    public boolean contains(Location pt) {
        return outer.contains(pt);
    }

    // remove the entire bullseye from the canvas
    public void removeFromCanvas() {
        outer.removeFromCanvas();
        rest.removeFromCanvas();
    }
    
    public int numRings() {
        return 1+rest.numRings();
    }
       
}