// Copyright (c) 2006 - 2008, Markus Strauch.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
// * Redistributions of source code must retain the above copyright notice, 
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice, 
// this list of conditions and the following disclaimer in the documentation 
// and/or other materials provided with the distribution.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 
// THE POSSIBILITY OF SUCH DAMAGE.

package net.sf.sdedit.editor;

import java.awt.event.ActionEvent;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;

import javax.swing.AbstractAction;
import javax.swing.Action;

import net.sf.sdedit.config.ConfigurationManager;
import net.sf.sdedit.diagram.Diagram;
import net.sf.sdedit.diagram.Lifeline;
import net.sf.sdedit.drawable.Drawable;
import net.sf.sdedit.icons.Icons;
import net.sf.sdedit.text.TextHandler;
import net.sf.sdedit.util.Grep;

/**
 * This action generates an HTML map file from the diagram currently being
 * displayed.
 * <p>
 * The name/id of the map is equal to the name of the diagram file (so there
 * must be a file associated to the diagram). The map contains a
 * "hot-spot" resp. <tt>AREA</tt> tag for each head of a lifeline
 * that occurs in the diagram. By default, the <tt>href</tt> attribute
 * contains the name of the object/lifeline. If you add an active comment,
 * starting with <tt>#!</tt>, behind the object declaration, the content of
 * the comment is used for the <tt>href</tt> attribute.
 * 
 * @author Markus Strauch
 */
@SuppressWarnings("serial")
class ExportMapAction extends AbstractAction {

	private Editor editor;

	private File directory;

	/**
	 * Constructor.
	 * 
	 * @param editor
	 */
	ExportMapAction(Editor editor) {
		this.editor = editor;
		putValue(Action.NAME, "Export &HTML map file");
		putValue(Action.SHORT_DESCRIPTION, "Create an HTML file with"
				+ " an image map for the diagram currently being displayed");
		putValue(Action.SMALL_ICON, Icons.getIcon("map"));
	}

	/**
	 * See {@linkplain ExportMapAction}.
	 * 
	 * @param e
	 */
	public void actionPerformed(ActionEvent e) {
		Diagram diagram = editor.getUI().getDiagram();
		if (diagram == null || diagram.getLifelines().isEmpty()) {
			return;
		}
		TextHandler textHandler = (TextHandler) diagram.getDataProvider();
		File currentFile = editor.getUI().getCurrentFile();
		if (currentFile == null) {
			editor.getUI().message("Please save the diagram as a file first.");
			return;
		}
		String name = currentFile.getName();
		int dot = Math.min(name.length(), name.lastIndexOf('.'));
		name = currentFile.getName().substring(0, dot);
		if (directory == null) {
			directory = currentFile.getParentFile();
		}

		File[] target = editor.getUI().getFiles(false, false,
				"Export HTML map file", name + ".html", directory, "HTML files", "html");
		if (target != null && target.length > 0) {
			directory = target[0].getParentFile();
			if (!target[0].exists()
					|| 1 == editor.getUI().confirmOrCancel(
							"Overwrite existing file:\n"
									+ target[0].getAbsolutePath() + "?")) {
				try {
					generateMapFile(diagram, textHandler, name, target[0]);
				} catch (IOException ex) {
					editor.getUI().errorMessage(
							"The map file could not be saved due to an exception of type\n"
									+ ex.getClass().getSimpleName()
									+ " with the message: " + ex.getMessage());
				}
			}
		}
	}

	private void generateMapFile(Diagram diagram, TextHandler textHandler,
			String mapName, File target) throws IOException {
		String encoding = ConfigurationManager.getGlobalConfiguration().getFileEncoding();
		FileOutputStream fos = new FileOutputStream(target);
		OutputStreamWriter osw = new OutputStreamWriter(fos, encoding);
		PrintWriter pw = new PrintWriter(osw);
		pw.println("<!-- Generated by Quick Sequence Diagram Editor -->");
		pw.println("<!-- encoding: " + encoding + " -->");
		pw
				.println("<!-- You may append '#!href=\"<url>\"' to an object declaration\nin order to set"
						+ " the 'href' attribute of an AREA tag -->");
		pw.println("<map id=\"" + mapName + "\" name=\"" + mapName + "\">");
		for (Lifeline lifeline : diagram.getAllLifelines()) {
			String annotation = textHandler.getAnnotation(lifeline);
			String file = lifeline.getName();
			if (annotation != null) {
				String href[] = Grep.parse("^.*?href=\"(.*?)\".*$", annotation);
				if (href != null) {
					file = href[0];
				}
			}
			Drawable drawable = lifeline.getHead();
			int x1 = drawable.getLeft();
			int y1 = drawable.getTop();
			int x2 = drawable.getRight();
			int y2 = drawable.getBottom();
			String coords = x1 + "," + y1 + "," + x2 + "," + y2;
			pw.println("  <area shape=\"rect\" coords=\"" + coords + "\""
					+ " href=\"" + file + "\"/>");
		}
		pw.println("</map>");
		pw.flush();
		pw.close();
	}
}