/* ========================================================================
 * 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.directdot;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;

import net.atmp.ImageBuilder;
import net.sourceforge.plantuml.AbstractPSystem;
import net.sourceforge.plantuml.FileFormat;
import net.sourceforge.plantuml.FileFormatOption;
import net.sourceforge.plantuml.FileImageData;
import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.api.ImageDataSimple;
import net.sourceforge.plantuml.core.DiagramDescription;
import net.sourceforge.plantuml.core.ImageData;
import net.sourceforge.plantuml.core.UmlSource;
import net.sourceforge.plantuml.dot.ExeState;
import net.sourceforge.plantuml.dot.Graphviz;
import net.sourceforge.plantuml.dot.GraphvizRuntimeEnvironment;
import net.sourceforge.plantuml.dot.ProcessState;
import net.sourceforge.plantuml.klimt.shape.GraphicStrings;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.preproc.PreprocessingArtifact;

public class PSystemDot extends AbstractPSystem {
	

	private final String data;

	public PSystemDot(UmlSource source, String data, PreprocessingArtifact preprocessing) {
		super(source, preprocessing);
		this.data = data;
	}

	public DiagramDescription getDescription() {
		return new DiagramDescription("(Dot)");
	}

	@Override
	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
			throws IOException {

		if (fileFormat.getFileFormat() == FileFormat.SVG) {
			final String svg = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
					+ "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n"
					+ "<a xlink:href=\"https://github.com/plantuml/plantuml/issues/2495\">\n"
					+ "<text x=\"10\" y=\"30\" font-family=\"sans-serif\" font-size=\"14\" fill=\"blue\" text-decoration=\"underline\">This feature has been suppressed</text>\n"
					+ "</a>\n"
					+ "</svg>";
			os.write(svg.getBytes("UTF-8"));
			return ImageDataSimple.ok();
		}

		final Graphviz graphviz = GraphvizRuntimeEnvironment.getInstance().createForSystemDot(null, data,
				StringUtils.goLowerCase(fileFormat.getFileFormat().name()));
		if (graphviz.getExeState() != ExeState.OK) {
			final TextBlock result = GraphicStrings
					.createForError(Arrays.asList("There is an issue with your Dot/Graphviz installation"), false);
			return ImageBuilder.create(fileFormat, result).seed(seed()).status(FileImageData.CRASH).write(os);
		}

		final CounterOutputStream counter = new CounterOutputStream(os);
		final ProcessState state = graphviz.createFile3(counter);
		// if (state.differs(ProcessState.TERMINATED_OK())) {
		// throw new IllegalStateException("Timeout1 " + state);
		// }
		if (counter.getLength() == 0 || state.differs(ProcessState.TERMINATED_OK())) {
			final TextBlock result = GraphicStrings.createForError(Arrays.asList("GraphViz has crashed"), false);
			return ImageBuilder.create(fileFormat, result).seed(seed()).status(FileImageData.CRASH).write(os);
		}

		return ImageDataSimple.ok();
	}

}
