/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2023, 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.graphic;

import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import net.sourceforge.plantuml.AnnotatedBuilder;
import net.sourceforge.plantuml.FileFormatOption;
import net.sourceforge.plantuml.FontParam;
import net.sourceforge.plantuml.ISkinParam;
import net.sourceforge.plantuml.awt.geom.XDimension2D;
import net.sourceforge.plantuml.core.ImageData;
import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.cucadiagram.DisplaySection;
import net.sourceforge.plantuml.graphic.StringBounder;
import net.sourceforge.plantuml.graphic.TextBlock;
import net.sourceforge.plantuml.graphic.TextBlockUtils;
import net.sourceforge.plantuml.graphic.UDrawable;
import net.sourceforge.plantuml.graphic.VerticalAlignment;
import net.sourceforge.plantuml.png.PngTitler;
import net.sourceforge.plantuml.sequencediagram.Event;
import net.sourceforge.plantuml.sequencediagram.Newpage;
import net.sourceforge.plantuml.sequencediagram.Participant;
import net.sourceforge.plantuml.sequencediagram.SequenceDiagram;
import net.sourceforge.plantuml.skin.rose.Rose;
import net.sourceforge.plantuml.style.SName;
import net.sourceforge.plantuml.style.Style;
import net.sourceforge.plantuml.style.StyleSignatureBasic;
import net.sourceforge.plantuml.ugraphic.UGraphic;
import net.sourceforge.plantuml.ugraphic.UTranslate;
import net.sourceforge.plantuml.ugraphic.color.HColor;

public class SequenceDiagramFileMakerPuma2 implements FileMaker {

	private final SequenceDiagram diagram;
	private final DrawableSet drawableSet;
	private final XDimension2D fullDimension;
	private final List<Page> pages;
	private final FileFormatOption fileFormatOption;
	private final StringBounder stringBounder;

	public SequenceDiagramFileMakerPuma2(SequenceDiagram diagram, Rose skin, FileFormatOption fileFormatOption) {
		this.diagram = diagram;
		this.stringBounder = fileFormatOption.getDefaultStringBounder(diagram.getSkinParam());
		this.fileFormatOption = fileFormatOption;
		final DrawableSetInitializer initializer = new DrawableSetInitializer(skin, diagram.getSkinParam(),
				diagram.isShowFootbox(), diagram.getAutonewpage());

		for (Participant p : diagram.participants())
			initializer.addParticipant(p, diagram.getEnglober(p));

		for (Event ev : diagram.events()) {
			initializer.addEvent(ev);
			// if (ev instanceof Message) {
			// // TODO mieux faire
			// final Message m = (Message) ev;
			// for (LifeEvent lifeEvent : m.getLiveEvents()) {
			// if (lifeEvent.getType() == LifeEventType.DESTROY
			// /*
			// * || lifeEvent.getType() == LifeEventType.CREATE
			// */) {
			// initializer.addEvent(lifeEvent);
			// }
			// }
			// }
		}
		drawableSet = initializer.createDrawableSet(stringBounder);
		final List<Newpage> newpages = new ArrayList<>();
		for (Event ev : drawableSet.getAllEvents())
			if (ev instanceof Newpage)
				newpages.add((Newpage) ev);

		fullDimension = drawableSet.getDimension();
		final Map<Newpage, Double> positions = new LinkedHashMap<Newpage, Double>();
		for (Newpage n : newpages)
			positions.put(n, initializer.getYposition(stringBounder, n));

		pages = create(drawableSet, positions, diagram.isShowFootbox(), diagram.getTitle().getDisplay()).getPages();
	}

	public int getNbPages() {
		return pages.size();
	}

	private PageSplitter create(DrawableSet drawableSet, Map<Newpage, Double> positions, boolean showFootbox,
			Display title) {

		final double headerHeight = drawableSet.getHeadHeight(stringBounder);
		final double tailHeight = drawableSet.getTailHeight(stringBounder, showFootbox);
		final double signatureHeight = 0;
		final double newpageHeight = drawableSet.getSkin().createComponentNewPage(drawableSet.getSkinParam())
				.getPreferredHeight(stringBounder);

		return new PageSplitter(fullDimension.getHeight(), headerHeight, positions, tailHeight, signatureHeight,
				newpageHeight, title);
	}

	public ImageData createOne(OutputStream os, final int index, boolean isWithMetadata) throws IOException {

		final Page page = pages.get(index);
		final AnnotatedBuilder builder = new AnnotatedBuilder(diagram, diagram.getSkinParam(), stringBounder);
		double pageHeight = page.getHeight();
		if (builder.hasMainFrame())
			pageHeight += builder.mainFrameSuppHeight();

		final SequenceDiagramArea area = new SequenceDiagramArea(fullDimension.getWidth(), pageHeight);

		final TextBlock compTitle;
		final TextBlock caption = builder.getCaption();
		area.setCaptionArea(caption.calculateDimension(stringBounder));

		if (Display.isNull(page.getTitle())) {
			compTitle = null;
		} else {
			final Style style = StyleSignatureBasic.of(SName.root, SName.document, SName.title)
					.getMergedStyle(diagram.getSkinParam().getCurrentStyleBuilder());
			compTitle = style.createTextBlockBordered(page.getTitle(), diagram.getSkinParam().getIHtmlColorSet(),
					diagram.getSkinParam(), Style.ID_TITLE);
			final XDimension2D dimTitle = compTitle.calculateDimension(stringBounder);
			area.setTitleArea(dimTitle.getWidth(), dimTitle.getHeight());
		}
		area.initFooter(getPngTitler(FontParam.FOOTER, index), stringBounder);
		area.initHeader(getPngTitler(FontParam.HEADER, index), stringBounder);

		final TextBlock legendBlock;
		if (diagram.getLegend().isNull()) {
			legendBlock = TextBlockUtils.empty(0, 0);
		} else {
			final Style style = StyleSignatureBasic.of(SName.root, SName.document, SName.legend)
					.getMergedStyle(diagram.getSkinParam().getCurrentStyleBuilder());
			legendBlock = style.createTextBlockBordered(diagram.getLegend().getDisplay(),
					diagram.getSkinParam().getIHtmlColorSet(), diagram.getSkinParam(), Style.ID_LEGEND);
		}
		final XDimension2D dimLegend = legendBlock.calculateDimension(stringBounder);
		area.setLegend(dimLegend, isLegendTop(), diagram.getLegend().getHorizontalAlignment());

		final UDrawable drawable = new UDrawable() {
			public void drawU(UGraphic ug) {

				double delta = 0;
				if (index > 0)
					delta = page.getNewpage1() - page.getHeaderHeight();

				if (delta < 0)
					delta = 0;

				if (compTitle != null) {
					final HColor back = diagram.calculateBackColor();
					compTitle.drawU(ug.apply(back.bg()).apply(new UTranslate(area.getTitleX(), area.getTitleY())));
				}
				caption.drawU(ug.apply(new UTranslate(area.getCaptionX(), area.getCaptionY())));

				final double delta1 = Math.max(0, area.getLegendWidth() - area.getWidth());

				final UTranslate forCore = new UTranslate(area.getSequenceAreaX() + delta1 / 2,
						area.getSequenceAreaY());
				TextBlock core = drawableSet.asTextBlock(delta, fullDimension.getWidth(), page,
						diagram.isShowFootbox());
				core = builder.decoreWithFrame(core);
				core.drawU(ug.apply(forCore));

				drawHeader(area, ug, index);
				drawFooter(area, ug, index);

				if (area.hasLegend())
					legendBlock.drawU(ug.apply(new UTranslate(area.getLegendX(), area.getLegendY())));

			}

		};
		return diagram.createImageBuilder(fileFormatOption).drawable(drawable).write(os);
	}

	private void drawFooter(SequenceDiagramArea area, UGraphic ug, int page) {
		final PngTitler pngTitler = getPngTitler(FontParam.FOOTER, page);
		final TextBlock text = pngTitler.getRibbonBlock();
		if (text == null)
			return;

		text.drawU(ug.apply(
				new UTranslate(area.getFooterX(diagram.getFooter().getHorizontalAlignment()), area.getFooterY())));
	}

	private void drawHeader(SequenceDiagramArea area, UGraphic ug, int page) {
		final PngTitler pngTitler = getPngTitler(FontParam.HEADER, page);
		final TextBlock text = pngTitler.getRibbonBlock();
		if (text == null)
			return;

		text.drawU(ug.apply(
				new UTranslate(area.getHeaderX(diagram.getHeader().getHorizontalAlignment()), area.getHeaderY())));
	}

	private PngTitler getPngTitler(final FontParam fontParam, int page) {
		final ISkinParam skinParam = diagram.getSkinParam();
		final DisplaySection display = diagram.getFooterOrHeaderTeoz(fontParam).withPage(page + 1, pages.size());
		final StyleSignatureBasic def = fontParam.getStyleDefinition(null);
		final Style style = def.getMergedStyle(skinParam.getCurrentStyleBuilder());

		return new PngTitler(display, style, skinParam.getIHtmlColorSet(), skinParam);
	}

	private boolean isLegendTop() {
		return diagram.getLegend().isNull() == false
				&& diagram.getLegend().getVerticalAlignment() == VerticalAlignment.TOP;
	}

}