import java.util.*;

/**
   I use this class to associate a Frame and a HashMap of shapes with a frame id.
   @author Charlie McDowell
 */
class FrameMap {
    private Frame frame;
    private int id;
    private HashMap<Integer,Shape> shapes = new HashMap<Integer,Shape>();

    /**
       Construct a FrameMap to wrap an underlying Frame.
       @param id to be associated with this Frame.
       @param frame the Frame
     */
    FrameMap(int id, Frame frame) {
        this.id = id;
        this.frame = frame;
    }

    /**
       Check if this frame contains a shape with the specified id.
     */
    boolean contains(int id) {
	return shapes.get(id) != null;
    }

    /**
       Get the frame id of this frame.
     */
    int getId() {
	return id;
    }

    /**
       Remove a shape from this frame given the shape's id.
       @param sid - the shapes integer id
     */
    void remove(int sid) {
        Shape shape = shapes.get(sid);
        if (shape == null) {
            System.out.println("Warning: No such shape");
        }
        else {
            frame.remove(shape);
            shapes.remove(sid);
        }
    }

    /**
       Show the underlying frame.
     */
    void show() {
        frame.show();
    }

    /**
       Remove all shapes from the underlying Frame.
    */
    void clear() {
        for (Shape s : shapes.values()) {
            frame.remove(s);
        }
        shapes.clear();
    }

    /**
       Add a shape with a specified id to this frame.
       @param shape - the shape to be added
       @param sid - the integer id used to delet the shape if needed later
     */
    void add(Shape shape, int sid) {
        frame.add(shape);
        shapes.put(sid, shape);
    }
}