/* ========================================================================
 * 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.util.ArrayList;
import java.util.List;

import net.sourceforge.plantuml.ISkinParam;
import net.sourceforge.plantuml.graphic.StringBounder;
import net.sourceforge.plantuml.real.Real;
import net.sourceforge.plantuml.real.RealUtils;
import net.sourceforge.plantuml.sequencediagram.LinkAnchor;
import net.sourceforge.plantuml.sequencediagram.SequenceDiagram;
import net.sourceforge.plantuml.ugraphic.LimitFinder;
import net.sourceforge.plantuml.ugraphic.UGraphic;

public class PlayingSpace implements Bordered {

	private final double startingY = 8;
	private final Real min;
	private final Real max;
	private final boolean isShowFootbox;

	private final List<Tile> tiles = new ArrayList<Tile>();
	private final LivingSpaces livingSpaces;
	private final List<LinkAnchor> linkAnchors;
	private final ISkinParam skinParam;

	public PlayingSpace(SequenceDiagram diagram, Englobers englobers, TileArguments tileArguments) {

		this.livingSpaces = tileArguments.getLivingSpaces();
		this.linkAnchors = diagram.getLinkAnchors();
		this.skinParam = diagram.getSkinParam();

		final List<Real> min2 = new ArrayList<Real>();
		final List<Real> max2 = new ArrayList<Real>();

		min2.add(tileArguments.getOrigin());
		max2.add(tileArguments.getOrigin());

		if (englobers.size() > 0) {
			min2.add(englobers.getMinX(tileArguments.getStringBounder()));
			max2.add(englobers.getMaxX(tileArguments.getStringBounder()));
		}

		tiles.addAll(TileBuilder.buildSeveral(diagram.events().iterator(), tileArguments, null));

		for (Tile tile : tiles) {
			min2.add(tile.getMinX(tileArguments.getStringBounder()));
			max2.add(tile.getMaxX(tileArguments.getStringBounder()));
		}

		for (LivingSpace livingSpace : livingSpaces.values()) {
			max2.add(livingSpace.getPosD(tileArguments.getStringBounder()));
			max2.add(livingSpace.getPosC2(tileArguments.getStringBounder()));
		}

		this.min = RealUtils.min(min2);
		this.max = RealUtils.max(max2);

		this.isShowFootbox = diagram.isShowFootbox();
	}

	public void drawBackground(UGraphic ug) {
		final StringBounder stringBounder = ug.getStringBounder();
		final LiveBoxFinder liveBoxFinder = new LiveBoxFinder(stringBounder);

		drawUInternal(liveBoxFinder, false);
		final UGraphicInterceptorTile interceptor = new UGraphicInterceptorTile(ug, true);
		drawUInternal(interceptor, false);
	}

	public void drawForeground(UGraphic ug) {
		final UGraphicInterceptorTile interceptor = new UGraphicInterceptorTile(ug, false);
		drawUInternal(interceptor, false);
	}

	private double drawUInternal(UGraphic ug, boolean trace) {
		final StringBounder stringBounder = ug.getStringBounder();
		final List<YPositionedTile> positionedTiles = new ArrayList<YPositionedTile>();
		final double y = GroupingTile.fillPositionelTiles(stringBounder, startingY, tiles, positionedTiles);
		for (YPositionedTile tile : positionedTiles) {
			tile.drawInArea(ug);
		}
		for (LinkAnchor linkAnchor : linkAnchors) {
			final YPositionedTile tile1 = getFromAnchor(positionedTiles, linkAnchor.getAnchor1());
			final YPositionedTile tile2 = getFromAnchor(positionedTiles, linkAnchor.getAnchor2());
			linkAnchor.drawAnchor(ug, tile1, tile2, skinParam);
		}
		// System.err.println("MainTile::drawUInternal finalY=" + y);
		return y;
	}

	private YPositionedTile getFromAnchor(List<YPositionedTile> positionedTiles, String anchor) {
		for (YPositionedTile tile : positionedTiles) {
			if (tile.matchAnchor(anchor)) {
				return tile;
			}
		}
		return null;
	}

	public double getPreferredHeight(StringBounder stringBounder) {
		final LimitFinder limitFinder = new LimitFinder(stringBounder, true);
		final UGraphicInterceptorTile interceptor = new UGraphicInterceptorTile(limitFinder, false);
		final double finalY = drawUInternal(interceptor, false);
		final double result = Math.max(limitFinder.getMinMax().getDimension().getHeight(), finalY) + 10;
		// System.err.println("MainTile::getPreferredHeight=" + result);
		return result;
	}

	public void addConstraints(StringBounder stringBounder) {
		for (Tile tile : tiles) {
			tile.addConstraints(stringBounder);
		}
	}

	public Real getMinX(StringBounder stringBounder) {
		return min;
	}

	public Real getMaxX(StringBounder stringBounder) {
		return max;
	}

	public boolean isShowFootbox() {
		return isShowFootbox;
	}

	public LivingSpaces getLivingSpaces() {
		return livingSpaces;
	}

	public double getBorder1() {
		return min.getCurrentValue();
	}

	public double getBorder2() {
		return max.getCurrentValue();
	}

	public List<Double> yNewPages() {
		final List<Double> yNewPages = new ArrayList<Double>();
		yNewPages.add((double) 0);
		for (Tile tile : tiles) {
			if (tile instanceof GroupingTile) {
				((GroupingTile) tile).addYNewPages(yNewPages);
			}
			if (tile instanceof NewpageTile) {
				final double y = ((NewpageTile) tile).getCallbackY();
				yNewPages.add(y);
			}
		}
		yNewPages.add(Double.MAX_VALUE);
		return yNewPages;
	}

	public int getNbPages() {
		return yNewPages().size() - 1;
	}

}
