/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2017, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
 * http://plantuml.com/patreon (only 1$ per month!)
 * http://plantuml.com/paypal
 * 
 * This file is part of PlantUML.
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PlantUML 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 General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 *
 * Original Author:  Arnaud Roques
 * 
 *
 */
package net.sourceforge.plantuml.svek.image;

import java.awt.geom.Dimension2D;

import net.sourceforge.plantuml.ColorParam;
import net.sourceforge.plantuml.Dimension2DDouble;
import net.sourceforge.plantuml.FontParam;
import net.sourceforge.plantuml.ISkinParam;
import net.sourceforge.plantuml.SkinParamUtils;
import net.sourceforge.plantuml.Url;
import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.cucadiagram.IEntity;
import net.sourceforge.plantuml.cucadiagram.Member;
import net.sourceforge.plantuml.cucadiagram.Stereotype;
import net.sourceforge.plantuml.graphic.FontConfiguration;
import net.sourceforge.plantuml.graphic.HorizontalAlignment;
import net.sourceforge.plantuml.graphic.HtmlColor;
import net.sourceforge.plantuml.graphic.StringBounder;
import net.sourceforge.plantuml.graphic.TextBlock;
import net.sourceforge.plantuml.graphic.color.ColorType;
import net.sourceforge.plantuml.svek.AbstractEntityImage;
import net.sourceforge.plantuml.svek.ShapeType;
import net.sourceforge.plantuml.ugraphic.Shadowable;
import net.sourceforge.plantuml.ugraphic.UChangeBackColor;
import net.sourceforge.plantuml.ugraphic.UChangeColor;
import net.sourceforge.plantuml.ugraphic.UGraphic;
import net.sourceforge.plantuml.ugraphic.URectangle;
import net.sourceforge.plantuml.ugraphic.UStroke;
import net.sourceforge.plantuml.ugraphic.UTranslate;

public class EntityImageStateEmptyDescription extends AbstractEntityImage {

	final private TextBlock desc;
	final private Url url;

	final private static int MIN_WIDTH = 50;
	final private static int MIN_HEIGHT = 40;

	public EntityImageStateEmptyDescription(IEntity entity, ISkinParam skinParam) {
		super(entity, skinParam);
		final Stereotype stereotype = entity.getStereotype();

		this.desc = entity.getDisplay().create(new FontConfiguration(getSkinParam(), FontParam.STATE, stereotype),
				HorizontalAlignment.CENTER, skinParam);

		Display list = Display.empty();
		for (Member att : entity.getBodier().getFieldsToDisplay()) {
			list = list.addAll(Display.getWithNewlines(att.getDisplay(true)));
		}

		this.url = entity.getUrl99();

	}

	public Dimension2D calculateDimension(StringBounder stringBounder) {
		final Dimension2D dim = desc.calculateDimension(stringBounder);
		final Dimension2D result = Dimension2DDouble.delta(dim, MARGIN * 2);
		return Dimension2DDouble.atLeast(result, MIN_WIDTH, MIN_HEIGHT);
	}

	final public void drawU(UGraphic ug) {
		if (url != null) {
			ug.startUrl(url);
		}
		final StringBounder stringBounder = ug.getStringBounder();
		final Dimension2D dimTotal = calculateDimension(stringBounder);
		final Dimension2D dimDesc = desc.calculateDimension(stringBounder);

		final double widthTotal = dimTotal.getWidth();
		final double heightTotal = dimTotal.getHeight();
		final Shadowable rect = new URectangle(widthTotal, heightTotal, CORNER, CORNER);
		if (getSkinParam().shadowing()) {
			rect.setDeltaShadow(4);
		}

		ug = ug.apply(new UStroke(1.5)).apply(
				new UChangeColor(SkinParamUtils.getColor(getSkinParam(), ColorParam.stateBorder, getStereo())));
		HtmlColor backcolor = getEntity().getColors(getSkinParam()).getColor(ColorType.BACK);
		if (backcolor == null) {
			backcolor = SkinParamUtils.getColor(getSkinParam(), ColorParam.stateBackground, getStereo());
		}
		ug = ug.apply(new UChangeBackColor(backcolor));
		ug.draw(rect);
		final double xDesc = (widthTotal - dimDesc.getWidth()) / 2;
		final double yDesc = (heightTotal - dimDesc.getHeight()) / 2;
		desc.drawU(ug.apply(new UTranslate(xDesc, yDesc)));

		if (url != null) {
			ug.closeAction();
		}
	}

	public ShapeType getShapeType() {
		return ShapeType.ROUND_RECTANGLE;
	}

}