/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2020, 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.sequencediagram.teoz;

import java.awt.geom.Dimension2D;

import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.graphic.StringBounder;
import net.sourceforge.plantuml.real.Real;
import net.sourceforge.plantuml.sequencediagram.Event;
import net.sourceforge.plantuml.sequencediagram.Participant;
import net.sourceforge.plantuml.sequencediagram.Reference;
import net.sourceforge.plantuml.skin.Area;
import net.sourceforge.plantuml.skin.Component;
import net.sourceforge.plantuml.skin.ComponentType;
import net.sourceforge.plantuml.skin.Context2D;
import net.sourceforge.plantuml.ugraphic.UGraphic;
import net.sourceforge.plantuml.ugraphic.UTranslate;

public class ReferenceTile extends AbstractTile implements Tile {

	private final Reference reference;
	private final TileArguments tileArguments;
	private Real first;
	private Real last;

	public Event getEvent() {
		return reference;
	}

	public ReferenceTile(Reference reference, TileArguments tileArguments) {
		this.reference = reference;
		this.tileArguments = tileArguments;
	}

	private void init(StringBounder stringBounder) {
		if (first != null) {
			return;
		}
		for (Participant p : reference.getParticipant()) {
			final LivingSpace livingSpace = tileArguments.getLivingSpace(p);
			final Real pos = livingSpace.getPosC(stringBounder);
			if (first == null || pos.getCurrentValue() < first.getCurrentValue()) {
				this.first = livingSpace.getPosB();
			}
			if (last == null || pos.getCurrentValue() > last.getCurrentValue()) {
				this.last = livingSpace.getPosD(stringBounder);
			}
		}
		final Component comp = getComponent(stringBounder);
		final Dimension2D dim = comp.getPreferredDimension(stringBounder);
		if (reference.getParticipant().size() == 1) {
			this.last = this.last.addAtLeast(0);
		}
		this.last.ensureBiggerThan(this.first.addFixed(dim.getWidth()));

	}

	private Component getComponent(StringBounder stringBounder) {
		Display strings = Display.empty();
		strings = strings.add("ref");
		strings = strings.addAll(reference.getStrings());

		final Component comp = tileArguments.getSkin().createComponent(null, ComponentType.REFERENCE,
				null, tileArguments.getSkinParam(), strings);
		return comp;
	}

	public void drawU(UGraphic ug) {
		final StringBounder stringBounder = ug.getStringBounder();
		init(stringBounder);
		final Component comp = getComponent(stringBounder);
		final Dimension2D dim = comp.getPreferredDimension(stringBounder);
		final Area area = new Area(last.getCurrentValue() - first.getCurrentValue(), dim.getHeight());

		ug = ug.apply(new UTranslate(first.getCurrentValue(), 0));
		comp.drawU(ug, area, (Context2D) ug);
	}

	public double getPreferredHeight(StringBounder stringBounder) {
		final Component comp = getComponent(stringBounder);
		final Dimension2D dim = comp.getPreferredDimension(stringBounder);
		return dim.getHeight();
	}

	public void addConstraints(StringBounder stringBounder) {
	}

	public Real getMinX(StringBounder stringBounder) {
		init(stringBounder);
		return this.first;
	}

	public Real getMaxX(StringBounder stringBounder) {
		init(stringBounder);
		return this.last;
	}

}
