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

import net.sourceforge.plantuml.LineLocation;
import net.sourceforge.plantuml.activitydiagram3.ActivityDiagram3;
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.RegexResult;
import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.graphic.color.ColorParser;
import net.sourceforge.plantuml.ugraphic.color.HColor;
import net.sourceforge.plantuml.ugraphic.color.NoSuchColorException;

public class CommandIf4 extends SingleLineCommand2<ActivityDiagram3> {

	public CommandIf4() {
		super(getRegexConcat());
	}

	static IRegex getRegexConcat() {
		return RegexConcat.build(CommandIf4.class.getName(), RegexLeaf.start(), //
				ColorParser.exp4(), //
				new RegexLeaf("if"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("\\("), //
				new RegexLeaf("TEST", "(.*?)"), //
				new RegexLeaf("\\)"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("(is|equals?)"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("\\("), //
				new RegexLeaf("WHEN", "(.+?)"), //
				new RegexLeaf("\\)"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("then"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf(";?"), //
				RegexLeaf.end());
	}

	@Override
	protected CommandExecutionResult executeArg(ActivityDiagram3 diagram, LineLocation location, RegexResult arg)
			throws NoSuchColorException {
		final String s = arg.get("COLOR", 0);
		final HColor color = s == null ? null
				: diagram.getSkinParam().getIHtmlColorSet().getColor(diagram.getSkinParam().getThemeStyle(), s);

		String test = arg.get("TEST", 0);
		if (test.length() == 0) {
			test = null;
		}
		diagram.startIf(Display.getWithNewlines(test), Display.getWithNewlines(arg.get("WHEN", 0)), color, null);

		return CommandExecutionResult.ok();
	}
}
