/* ========================================================================
 * 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!)
 * https://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.cheneer.command;

import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.abel.LeafType;
import net.sourceforge.plantuml.abel.Link;
import net.sourceforge.plantuml.abel.LinkArg;
import net.sourceforge.plantuml.cheneer.ChenEerDiagram;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.decoration.LinkDecor;
import net.sourceforge.plantuml.decoration.LinkType;
import net.sourceforge.plantuml.klimt.color.NoSuchColorException;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.plasma.Quark;
import net.sourceforge.plantuml.regex.IRegex;
import net.sourceforge.plantuml.regex.RegexConcat;
import net.sourceforge.plantuml.regex.RegexLeaf;
import net.sourceforge.plantuml.regex.RegexOptional;
import net.sourceforge.plantuml.regex.RegexResult;
import net.sourceforge.plantuml.stereo.Stereotype;
import net.sourceforge.plantuml.utils.LineLocation;

public class CommandCreateAttribute extends SingleLineCommand2<ChenEerDiagram> {

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

	protected static IRegex getRegexConcat() {
		return RegexConcat.build(CommandCreateEntity.class.getName(), RegexLeaf.start(), //
				RegexLeaf.spaceZeroOrMore(),
				new RegexOptional( // Copied from CommandCreatePackageBlock
						new RegexConcat( //
								new RegexLeaf("DISPLAY", "[%g]([^%g]+)[%g]"), //
								RegexLeaf.spaceOneOrMore(), //
								new RegexLeaf("as"), //
								RegexLeaf.spaceOneOrMore() //
						)), //
				new RegexLeaf("CODE", "([%pLN%s_.:]+)"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("STEREO", "(<<.*>>)?"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("COMPOSITE", "(\\{)?"), //
				RegexLeaf.end());
	}

	@Override
	protected CommandExecutionResult executeArg(ChenEerDiagram diagram, LineLocation location, RegexResult arg)
			throws NoSuchColorException {
		final Entity owner = diagram.peekOwner();
		if (owner == null) {
			return CommandExecutionResult.error("Attribute must be inside an entity, relationship or another attribute");
		}

		final LeafType type = LeafType.CHEN_ATTRIBUTE;
		final String idShort = diagram.cleanId(arg.get("CODE", 0).trim());
		final String id = owner.getName() + "/" + idShort;
		final Quark<Entity> quark = diagram.quarkInContext(true, id);
		String displayText = arg.get("DISPLAY", 0);
		if (displayText == null)
			displayText = idShort;

		final String stereo = arg.get("STEREO", 0);
		final boolean composite = arg.get("COMPOSITE", 0) != null;

		Entity entity = quark.getData();
		if (entity == null) {
			final Display display = Display.getWithNewlines(displayText);
			entity = diagram.reallyCreateLeaf(quark, display, type, null);
		} else {
			return CommandExecutionResult.error("Attribute already exists");
		}

		if (stereo != null) {
			entity.setStereotype(Stereotype.build(stereo));
			entity.setStereostyle(stereo);
		}

		final LinkType linkType = new LinkType(LinkDecor.NONE, LinkDecor.NONE);
		final Link link = new Link(diagram.getEntityFactory(), diagram.getCurrentStyleBuilder(), entity, owner, linkType,
				LinkArg.build(Display.NULL, 2));
		diagram.addLink(link);

		if (composite) {
			diagram.pushOwner(entity);
		}

		return CommandExecutionResult.ok();
	}

}