/*
 * Created on 19.03.2005
 */

package net.sourceforge.tuned.ui.notification;


import static net.sourceforge.tuned.ui.notification.Direction.SOUTH_EAST;
import static net.sourceforge.tuned.ui.notification.Direction.WEST;

import java.awt.Dimension;
import java.awt.GraphicsConfiguration;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Toolkit;
import java.util.ArrayList;
import java.util.List;


public class QueueNotificationLayout implements NotificationLayout {
	
	private final List<NotificationWindow> notifications = new ArrayList<NotificationWindow>();
	
	private final Direction alignment;
	private final Direction direction;
	private final Direction growAnchor;
	
	
	public QueueNotificationLayout() {
		this(SOUTH_EAST, WEST);
	}
	

	public QueueNotificationLayout(Direction alignment, Direction direction) {
		this.alignment = alignment;
		this.growAnchor = alignment;
		this.direction = direction;
	}
	

	public QueueNotificationLayout(Direction orientation, Direction direction, Direction growAnchor) {
		this.alignment = orientation;
		this.direction = direction;
		this.growAnchor = growAnchor;
	}
	

	private Point getBaseAnchor(Dimension screen, Insets insets) {
		Point p = new Point();
		
		screen.height -= insets.top + insets.bottom;
		screen.width -= insets.left + insets.right;
		
		p.x = (int) (alignment.ax * screen.width);
		p.y = (int) (alignment.ay * screen.height);
		
		p.x += insets.left;
		p.y += insets.top;
		
		return p;
	}
	

	private Point getLocation(Point anchor, Dimension size) {
		Point p = new Point();
		
		p.x = (int) (anchor.x - size.width * growAnchor.ax);
		p.y = (int) (anchor.y - size.height * growAnchor.ay);
		
		return p;
	}
	

	private Point getNextAnchor(Point anchor, Dimension size) {
		Point p = new Point();
		
		p.x = anchor.x + size.width * direction.vx;
		p.y = anchor.y + size.height * direction.vy;
		
		return p;
	}
	

	public void add(NotificationWindow notification) {
		notifications.add(notification);
		align(notification.getGraphicsConfiguration());
	}
	

	private void align(GraphicsConfiguration gc) {
		Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
		Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(gc);
		
		Point anchor = getBaseAnchor(screen, insets);
		
		for (NotificationWindow window : notifications) {
			Dimension size = window.getSize();
			
			Point p = getLocation(anchor, size);
			window.setLocation(p);
			
			anchor = getNextAnchor(anchor, size);
		}
	}
	

	public void remove(NotificationWindow notification) {
		if (notifications.remove(notification)) {
			align(notification.getGraphicsConfiguration());
		}
	}
	
}