/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, 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!)
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 * 
 * 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 :  Hisashi Miyashita
 *
 */
package net.sourceforge.plantuml.descdiagram.command;

import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.abel.LinkArrow;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.regex.Matcher2;
import net.sourceforge.plantuml.regex.Pattern2;
import net.sourceforge.plantuml.regex.RegexResult;
import net.sourceforge.plantuml.skin.Pragma;

public class Labels {

	private String firstLabel;
	private String secondLabel;
	private String firstRole;
	private String secondRole;
	private final StringWithArrow stringWithArrow;

	public Labels(RegexResult arg) {
		this.firstLabel = arg.get("FIRST_LABEL", 0);
		this.secondLabel = arg.get("SECOND_LABEL", 0);
		this.firstRole = cleanRole(arg.get("FIRST_ROLE", 0));
		this.secondRole = cleanRole(arg.get("SECOND_ROLE", 0));
		String labelLink = arg.get("LABEL_LINK", 0);

		if (labelLink != null)
			labelLink = init(labelLink);

		this.stringWithArrow = new StringWithArrow(labelLink);

	}

	private static String cleanRole(String role) {
		if (role == null)
			return null;
		return StringUtils.eventuallyRemoveStartingAndEndingDoubleQuote(role, "\"");
	}

	private static final Pattern2 BOTH_LABELS = Pattern2.cmpile("^[%g]([^%g]+)[%g]([^%g]+)[%g]([^%g]+)[%g]$");
	private static final Pattern2 FIRST_LABEL_ONLY = Pattern2.cmpile("^[%g]([^%g]+)[%g]([^%g]+)$");
	private static final Pattern2 SECOND_LABEL_ONLY = Pattern2.cmpile("^([^%g]+)[%g]([^%g]+)[%g]$");

	private String init(String labelLink) {
		if (firstLabel == null && secondLabel == null) {
			final Matcher2 m1 = BOTH_LABELS.matcher(labelLink);
			if (m1.matches()) {
				firstLabel = m1.group(1);
				secondLabel = m1.group(3);
				return StringUtils
						.trin(StringUtils.eventuallyRemoveStartingAndEndingDoubleQuote(StringUtils.trin(m1.group(2))));
			}
			final Matcher2 m2 = FIRST_LABEL_ONLY.matcher(labelLink);
			if (m2.matches()) {
				firstLabel = m2.group(1);
				secondLabel = null;
				return StringUtils
						.trin(StringUtils.eventuallyRemoveStartingAndEndingDoubleQuote(StringUtils.trin(m2.group(2))));
			}
			final Matcher2 m3 = SECOND_LABEL_ONLY.matcher(labelLink);
			if (m3.matches()) {
				firstLabel = null;
				secondLabel = m3.group(2);
				return StringUtils
						.trin(StringUtils.eventuallyRemoveStartingAndEndingDoubleQuote(StringUtils.trin(m3.group(1))));
			}
		}
		return StringUtils.eventuallyRemoveStartingAndEndingDoubleQuote(labelLink, "\"");
	}

	public final String getFirstLabel() {
		return firstLabel;
	}

	public final String getSecondLabel() {
		return secondLabel;
	}

	public final String getFirstRole() {
		return firstRole;
	}

	public final String getSecondRole() {
		return secondRole;
	}

	public final String getLabelLink() {
		return stringWithArrow.getLabel();
	}

	public final LinkArrow getLinkArrow() {
		return stringWithArrow.getLinkArrow();
	}

	public Display getDisplay(Pragma pragma) {
		return stringWithArrow.getDisplay(pragma);
	}

}
