/* ========================================================================
 * 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.activitydiagram3.command;

import net.sourceforge.plantuml.activitydiagram3.ActivityDiagram3;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.command.regex.RegexConcat;
import net.sourceforge.plantuml.command.regex.RegexLeaf;
import net.sourceforge.plantuml.command.regex.RegexOr;
import net.sourceforge.plantuml.command.regex.RegexResult;
import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.descdiagram.command.CommandLinkElement;
import net.sourceforge.plantuml.graphic.Rainbow;

public class CommandArrow3 extends SingleLineCommand2 {

	public static final String STYLE_COLORS = "-\\[(" + CommandLinkElement.LINE_STYLE + "(?:;"
			+ CommandLinkElement.LINE_STYLE + ")*)\\]->";

	public CommandArrow3() {
		super(getRegexConcat());
	}

	static RegexConcat getRegexConcat() {
		return new RegexConcat(new RegexLeaf("^"), //
				new RegexOr(//
						new RegexLeaf("->"), //
						new RegexLeaf("COLOR", STYLE_COLORS)), //
				new RegexLeaf("[%s]*"), //
				new RegexOr(//
						new RegexLeaf("LABEL", "(.*);"), //
						new RegexLeaf("")), //
				new RegexLeaf("$"));
	}

	@Override
	protected CommandExecutionResult executeArg(ActivityDiagram3 diagram, RegexResult arg) {

		final String colorString = arg.get("COLOR", 0);
		if (colorString != null) {
			Rainbow rainbow = Rainbow.build(diagram.getSkinParam(), colorString, diagram.getSkinParam()
					.colorArrowSeparationSpace());
			diagram.setColorNextArrow(rainbow);
		}
		final String label = arg.get("LABEL", 0);
		if (label != null && label.length() > 0) {
			diagram.setLabelNextArrow(Display.getWithNewlines(label));
		}

		return CommandExecutionResult.ok();
	}

}