/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2020, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/paypal
 * 
 * This file is part of PlantUML.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *
 * Original Author:  Arnaud Roques
 */
package net.sourceforge.plantuml.sequencediagram.teoz;

import java.awt.geom.Dimension2D;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;

import net.sourceforge.plantuml.ColorParam;
import net.sourceforge.plantuml.ISkinParam;
import net.sourceforge.plantuml.SkinParamBackcolored;
import net.sourceforge.plantuml.graphic.StringBounder;
import net.sourceforge.plantuml.graphic.SymbolContext;
import net.sourceforge.plantuml.sequencediagram.graphic.Segment;
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.skin.rose.Rose;
import net.sourceforge.plantuml.style.Style;
import net.sourceforge.plantuml.ugraphic.UGraphic;
import net.sourceforge.plantuml.ugraphic.UTranslate;

public class LiveBoxesDrawer {

	private double y1;
	private SymbolContext symbolContext;

	private final Component cross;
	private final Context2D context;
	private final Rose skin;
	private final ISkinParam skinParam;
	private final Component compForWidth;
	private final Collection<Segment> delays;

	public LiveBoxesDrawer(Context2D context, Rose skin, ISkinParam skinParam, Map<Double, Double> delays) {
		this.cross = skin.createComponent(
				new Style[] { ComponentType.DESTROY.getDefaultStyleDefinition()
						.getMergedStyle(skinParam.getCurrentStyleBuilder()) },
				ComponentType.DESTROY, null, skinParam, null);
		this.compForWidth = skin.createComponent(
				new Style[] { ComponentType.ALIVE_BOX_CLOSE_CLOSE.getDefaultStyleDefinition()
						.getMergedStyle(skinParam.getCurrentStyleBuilder()) },
				ComponentType.ALIVE_BOX_CLOSE_CLOSE, null, skinParam, null);
		this.context = context;
		this.skin = skin;
		this.skinParam = skinParam;
		this.delays = new HashSet<>();
		for (Map.Entry<Double, Double> ent : delays.entrySet()) {
			this.delays.add(new Segment(ent.getKey(), ent.getKey() + ent.getValue()));
		}
	}

	public double getWidth(StringBounder stringBounder) {
		return compForWidth.getPreferredWidth(stringBounder);
	}

	public void addStart(double y1, SymbolContext symbolContext) {
		this.y1 = y1;
		this.symbolContext = symbolContext;
	}

	public void doDrawing(UGraphic ug, double yposition) {
		final Segment full = new Segment(y1, yposition);
		final Collection<Segment> segments = full.cutSegmentIfNeed(delays);
		ComponentType type = ComponentType.ALIVE_BOX_CLOSE_CLOSE;
		if (segments.size() > 1) {
			type = ComponentType.ALIVE_BOX_CLOSE_OPEN;
		}
		for (Iterator<Segment> it = segments.iterator(); it.hasNext();) {
			final Segment seg = it.next();
			if (it.hasNext() == false && type != ComponentType.ALIVE_BOX_CLOSE_CLOSE) {
				type = ComponentType.ALIVE_BOX_OPEN_CLOSE;
			}
			drawInternal(ug, seg.getPos1(), seg.getPos2(), type);
			type = ComponentType.ALIVE_BOX_OPEN_OPEN;
		}
		y1 = Double.MAX_VALUE;
	}

	public void drawDestroyIfNeeded(UGraphic ug, Step step) {
		if (step.isDestroy()) {
			final Dimension2D dimCross = cross.getPreferredDimension(ug.getStringBounder());
			cross.drawU(ug.apply(new UTranslate(-dimCross.getWidth() / 2, step.getValue() - dimCross.getHeight() / 2)),
					null, context);
		}
	}

	private void drawInternal(UGraphic ug, double ya, double yb, ComponentType type) {
		final double width = getWidth(ug.getStringBounder());
		final Area area = new Area(width, yb - ya);
		SkinParamBackcolored skinParam2 = new SkinParamBackcolored(skinParam,
				symbolContext == null ? null : symbolContext.getBackColor());
		Style style = type.getDefaultStyleDefinition().getMergedStyle(skinParam.getCurrentStyleBuilder());
		if (style == null) {
			if (symbolContext != null)
				skinParam2.forceColor(ColorParam.sequenceLifeLineBorder, symbolContext.getForeColor());
		} else {
			style = style.eventuallyOverride(symbolContext);
		}
		final Component comp = skin.createComponent(new Style[] { style }, type, null, skinParam2, null);
		comp.drawU(ug.apply(new UTranslate(-width / 2, ya)), area, context);
	}

}
