/**
 * Copyright (C) 2001-2017 by RapidMiner and the contributors
 * 
 * Complete list of developers available at our web site:
 * 
 * http://rapidminer.com
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Affero General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with this program.
 * If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.gui.processeditor.results;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints;
import java.awt.geom.GeneralPath;

import javax.swing.border.Border;


/**
 *
 * @author Simon Fischer
 */
public class RapidBorder implements Border {

	private static final Insets INSETS = new Insets(5, 5, 5, 5);
	private final Color color;
	private final int cornerSize;
	private final int headerHeight;

	protected RapidBorder(Color color, int cornerSize, int headerHeight) {
		super();
		this.color = color;
		this.cornerSize = cornerSize;
		this.headerHeight = headerHeight;
	}

	@Override
	public Insets getBorderInsets(Component c) {
		return INSETS;
	}

	@Override
	public boolean isBorderOpaque() {
		return true;
	}

	@Override
	public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {

		width--;
		height--;

		Graphics2D g2 = (Graphics2D) g.create();
		g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

		GeneralPath border = new GeneralPath();
		// top left
		border.moveTo(x + cornerSize, y);
		border.lineTo(x + width - cornerSize, y);
		// top right
		border.curveTo(x + width - cornerSize, y, x + width, y, x + width, y + cornerSize);
		border.lineTo(x + width, y + height - cornerSize);
		// bottom right
		border.curveTo(x + width, y + height, x + width, y + height, x + width - cornerSize, y + height);
		border.lineTo(x + cornerSize, y + height);
		// bottom left
		border.curveTo(x, y + height, x, y + height, x, y + height - cornerSize);
		border.lineTo(x, y + cornerSize);
		// top left again
		border.curveTo(x, y, x, y, x + cornerSize, y);

		if (headerHeight > 0) {
			if (height <= headerHeight + cornerSize) {
				g2.setColor(color);
				g2.fill(border);
			} else {
				g2.setColor(c.getBackground());
				g2.fill(border);

				GeneralPath header = new GeneralPath();
				// top left
				header.moveTo(x + cornerSize, y);
				header.lineTo(x + width - cornerSize, y);
				// top right
				header.curveTo(x + width - cornerSize, y, x + width, y, x + width, y + cornerSize);
				header.lineTo(x + width, y + headerHeight);
				header.lineTo(x, y + headerHeight);
				header.lineTo(x, y + cornerSize);
				// top left again
				header.curveTo(x, y, x, y, x + cornerSize, y);
				g2.setColor(color);
				g2.fill(header);
			}
		}

		g2.setColor(color);
		g2.draw(border);

		g2.dispose();
	}
}