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

import net.sourceforge.plantuml.LineLocation;
import net.sourceforge.plantuml.activitydiagram3.ActivityDiagram3;
import net.sourceforge.plantuml.activitydiagram3.ForkStyle;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.command.regex.IRegex;
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;

public class CommandForkEnd3 extends SingleLineCommand2<ActivityDiagram3> {

	public CommandForkEnd3() {
		super(getRegexConcat());
	}

	static IRegex getRegexConcat() {
		return RegexConcat.build(CommandForkEnd3.class.getName(), //
				RegexLeaf.start(), //
				new RegexOr("STYLE", //
						new RegexConcat( //
								new RegexLeaf("end"), //
								RegexLeaf.spaceZeroOrMore(), //
								new RegexLeaf("fork") //
						), //
						new RegexConcat( //
								new RegexLeaf("fork"), //
								RegexLeaf.spaceZeroOrMore(), //
								new RegexLeaf("end") //
						), //
						new RegexConcat( //
								new RegexLeaf("end"), //
								RegexLeaf.spaceZeroOrMore(), //
								new RegexLeaf("merge") //
						) //
				), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("LABEL", "(\\{.+\\})?"), //
				new RegexLeaf(";?"), //
				RegexLeaf.end());
	}

	@Override
	protected CommandExecutionResult executeArg(ActivityDiagram3 diagram, LineLocation location, RegexResult arg) {
		final String style = arg.get("STYLE", 0);
		final ForkStyle forkStyle = style.contains("merge") ? ForkStyle.MERGE : ForkStyle.FORK;
		final String label = arg.get("LABEL", 0);
		return diagram.endFork(forkStyle, label);
	}

}
