/* ========================================================================
 * 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.jsondiagram;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import net.sourceforge.plantuml.Previous;
import net.sourceforge.plantuml.abel.DisplayPositioned;
import net.sourceforge.plantuml.command.PSystemAbstractFactory;
import net.sourceforge.plantuml.core.Diagram;
import net.sourceforge.plantuml.core.DiagramType;
import net.sourceforge.plantuml.core.UmlSource;
import net.sourceforge.plantuml.json.Json;
import net.sourceforge.plantuml.json.JsonValue;
import net.sourceforge.plantuml.json.ParseException;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.klimt.geom.HorizontalAlignment;
import net.sourceforge.plantuml.klimt.geom.VerticalAlignment;
import net.sourceforge.plantuml.log.Logme;
import net.sourceforge.plantuml.nio.PathSystem;
import net.sourceforge.plantuml.preproc.PreprocessingArtifact;
import net.sourceforge.plantuml.skin.UmlDiagramType;
import net.sourceforge.plantuml.style.parser.StyleParsingException;
import net.sourceforge.plantuml.text.BackSlash;
import net.sourceforge.plantuml.yaml.Highlighted;

public class JsonDiagramFactory extends PSystemAbstractFactory {

	public JsonDiagramFactory() {
		super(DiagramType.JSON);
	}

	@Override
	public Diagram createSystem(PathSystem pathSystem, UmlSource source, Previous previous, PreprocessingArtifact preprocessing) {
		final List<Highlighted> highlighted = new ArrayList<>();
		StyleExtractor styleExtractor = null;
		JsonValue json;
		try {
			final StringBuilder sb = new StringBuilder();
			styleExtractor = new StyleExtractor(source.iterator2());
			final Iterator<String> it = styleExtractor.getIterator();
			it.next();
			while (true) {
				final String line = it.next();
				if (it.hasNext() == false)
					break;

				if (line.startsWith("#")) {
					if (Highlighted.matchesDefinition(line)) {
						highlighted.add(Highlighted.build(line));
						continue;
					}
				} else {
					sb.append(line);
					sb.append(BackSlash.CHAR_NEWLINE);
				}
			}
			json = Json.parse(sb.toString());
		} catch (ParseException e) {
			json = null;
		}
		final JsonDiagram result = new JsonDiagram(source, UmlDiagramType.JSON, json, highlighted, styleExtractor, preprocessing);
		if (styleExtractor != null) {
			try {
				styleExtractor.applyStyles(result.getSkinParam());
			} catch (StyleParsingException e) {
				Logme.error(e);
			}
			final String title = styleExtractor.getTitle();
			if (title != null)
				result.setTitle(DisplayPositioned.single(Display.getWithNewlines(result.getPragma(), title), HorizontalAlignment.CENTER,
						VerticalAlignment.CENTER));
		}
		return result;
	}
	
	@Override
	public UmlDiagramType getUmlDiagramType() {
		return UmlDiagramType.JSON;
	}


}
