/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2017, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
 * http://plantuml.com/patreon (only 1$ per month!)
 * http://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.command.note;

import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.Url;
import net.sourceforge.plantuml.UrlBuilder;
import net.sourceforge.plantuml.UrlBuilder.ModeUrl;
import net.sourceforge.plantuml.activitydiagram.ActivityDiagram;
import net.sourceforge.plantuml.command.BlocLines;
import net.sourceforge.plantuml.command.Command;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.CommandMultilines2;
import net.sourceforge.plantuml.command.MultilinesStrategy;
import net.sourceforge.plantuml.command.Position;
import net.sourceforge.plantuml.command.SingleLineCommand2;
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.cucadiagram.IEntity;
import net.sourceforge.plantuml.cucadiagram.LeafType;
import net.sourceforge.plantuml.cucadiagram.Link;
import net.sourceforge.plantuml.cucadiagram.LinkDecor;
import net.sourceforge.plantuml.cucadiagram.LinkType;
import net.sourceforge.plantuml.graphic.color.ColorParser;
import net.sourceforge.plantuml.graphic.color.ColorType;
import net.sourceforge.plantuml.utils.UniqueSequence;

public final class FactoryNoteActivityCommand implements SingleMultiFactoryCommand {

	private RegexConcat getRegexConcatMultiLine() {
		return new RegexConcat(new RegexLeaf("^[%s]*note[%s]+"), //
				new RegexLeaf("POSITION", "(right|left|top|bottom)[%s]*"), //
				ColorParser.exp1(), //
				new RegexLeaf("[%s]*"), //
				new RegexLeaf("$"));
	}

	private RegexConcat getRegexConcatSingleLine() {
		return new RegexConcat(new RegexLeaf("^[%s]*note[%s]+"), //
				new RegexLeaf("POSITION", "(right|left|top|bottom)[%s]*"), //
				ColorParser.exp1(), //
				new RegexLeaf("[%s]*:[%s]*"), //
				new RegexLeaf("NOTE", "(.*)"), //
				new RegexLeaf("$"));
	}

	public Command createMultiLine(boolean withBracket) {
		return new CommandMultilines2(getRegexConcatMultiLine(),
				MultilinesStrategy.KEEP_STARTING_QUOTE) {

			@Override
			public String getPatternEnd() {
				return "(?i)^[%s]*end[%s]?note$";
			}

			public final CommandExecutionResult executeNow(final ActivityDiagram system, BlocLines lines) {
				// StringUtils.trim(lines, true);
				final RegexResult arg = getStartingPattern().matcher(StringUtils.trin(lines.getFirst499()));
				lines = lines.subExtract(1, 1);
				lines = lines.removeEmptyColumns();
				
				Display strings = lines.toDisplay();

				Url url = null;
				if (strings.size() > 0) {
					final UrlBuilder urlBuilder = new UrlBuilder(system.getSkinParam().getValue("topurl"),
							ModeUrl.STRICT);
					url = urlBuilder.getUrl(strings.get(0).toString());
				}
				if (url != null) {
					strings = strings.subList(1, strings.size());
				}

				// final String s = StringUtils.getMergedLines(strings);

				final IEntity note = system.createLeaf(UniqueSequence.getCode("GMN"), strings, LeafType.NOTE, null);
				if (url != null) {
					note.addUrl(url);
				}
				return executeInternal(system, arg, note);
			}
		};
	}

	public Command createSingleLine() {
		return new SingleLineCommand2(getRegexConcatSingleLine()) {

			@Override
			protected CommandExecutionResult executeArg(final ActivityDiagram system, RegexResult arg) {
				final IEntity note = system.createNote(UniqueSequence.getCode("GN"),
						Display.getWithNewlines(arg.get("NOTE", 0)));
				return executeInternal(system, arg, note);
			}
		};
	}

	private CommandExecutionResult executeInternal(ActivityDiagram diagram, RegexResult arg, IEntity note) {

		note.setSpecificColorTOBEREMOVED(ColorType.BACK, diagram.getSkinParam().getIHtmlColorSet().getColorIfValid(arg.get("COLOR", 0)));

		IEntity activity = diagram.getLastEntityConsulted();
		if (activity == null) {
			activity = diagram.getStart();
		}

		final Link link;

		final Position position = Position.valueOf(StringUtils.goUpperCase(arg.get("POSITION", 0))).withRankdir(
				diagram.getSkinParam().getRankdir());

		final LinkType type = new LinkType(LinkDecor.NONE, LinkDecor.NONE).goDashed();

		if (position == Position.RIGHT) {
			link = new Link(activity, note, type, Display.NULL, 1);
		} else if (position == Position.LEFT) {
			link = new Link(note, activity, type, Display.NULL, 1);
		} else if (position == Position.BOTTOM) {
			link = new Link(activity, note, type, Display.NULL, 2);
		} else if (position == Position.TOP) {
			link = new Link(note, activity, type, Display.NULL, 2);
		} else {
			throw new IllegalArgumentException();
		}
		diagram.addLink(link);
		return CommandExecutionResult.ok();
	}

}