/* ========================================================================
 * 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
 * Contribution   :  Serge Wenger
 * 
 *
 */
package net.sourceforge.plantuml.statediagram.command;

import net.sourceforge.plantuml.Direction;
import net.sourceforge.plantuml.command.regex.RegexConcat;
import net.sourceforge.plantuml.command.regex.RegexLeaf;
import net.sourceforge.plantuml.command.regex.RegexOptional;
import net.sourceforge.plantuml.descdiagram.command.CommandLinkElement;

public class CommandLinkStateReverse extends CommandLinkStateCommon {

	public CommandLinkStateReverse() {
		super(getRegex());
	}

	static RegexConcat getRegex() {
		return RegexConcat.build(CommandLinkStateReverse.class.getName(), RegexLeaf.start(), //
				getStatePattern("ENT2"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexConcat(
						//
						new RegexLeaf("ARROW_CIRCLE_END", "(o[%s]+)?"), //
						new RegexLeaf("\\<"), //
						new RegexLeaf("ARROW_BODY2", "(-*)"), //
						new RegexLeaf("ARROW_STYLE2", "(?:\\[(" + CommandLinkElement.LINE_STYLE + ")\\])?"), //
						new RegexLeaf("ARROW_DIRECTION", "(left|right|up|down|le?|ri?|up?|do?)?"), //
						new RegexLeaf("ARROW_STYLE1", "(?:\\[(" + CommandLinkElement.LINE_STYLE + ")\\])?"), //
						new RegexLeaf("ARROW_BODY1", "(-+)"), //
						new RegexLeaf("ARROW_CROSS_START", "(x)?")), //
				RegexLeaf.spaceZeroOrMore(), //
				getStatePattern("ENT1"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexOptional( //
						new RegexConcat( //
								new RegexLeaf(":"), //
								RegexLeaf.spaceZeroOrMore(), //
								new RegexLeaf("LABEL", "(.+)") //
						)), RegexLeaf.end());
	}

	@Override
	protected Direction getDefaultDirection() {
		return Direction.LEFT;
	}

}
