/*******************************************************************************
 * Copyright (c) 2008, 2012 Obeo.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Obeo - initial API and implementation
 *******************************************************************************/
package org.eclipse.emf.eef.codegen.core.launcher;

import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.common.util.URI;
import org.osgi.framework.Bundle;

/**
 * @author <a href="mailto:goulwen.lefur@obeo.fr">Goulwen Le Fur</a>
 */
public abstract class AbstractPropertiesGeneratorLauncher implements IPropertiesGeneratorLauncher {

	/**
	 * Name of the launcher
	 */
	private String name;

	/**
	 * @return the name
	 */
	public String getName() {
		return name;
	}

	/**
	 * @param name
	 *            the name to set
	 */
	public void setName(String name) {
		this.name = name;
	}

	/**
	 * A set containing the generation target
	 */
	protected Set<IContainer> targetContainer = new HashSet<IContainer>();

	/**
	 * @return the targetContainer
	 */
	public Set<IContainer> getTargetContainer() {
		return targetContainer;
	}

	/**
	 * Finds the template in the plug-in. Returns the template plug-in URI.
	 * 
	 * @param bundleID
	 *            is the plug-in ID
	 * @param relativePath
	 *            is the relative path of the template in the plug-in
	 * @return the template URI
	 * @throws IOException
	 * @deprecated
	 */
	protected URI getTemplateURI(String bundleID, IPath relativePath) throws IOException {
		Bundle bundle = Platform.getBundle(bundleID);
		if (bundle == null) {
			// no need to go any further
			return URI.createPlatformResourceURI(new Path(bundleID).append(relativePath).toString(), false);
		}
		URL url = bundle.getEntry(relativePath.toString());
		if (url == null && relativePath.segmentCount() > 1) {
			Enumeration<URL> entries = bundle.findEntries("/", "*.emtl", true);
			if (entries != null) {
				String[] segmentsRelativePath = relativePath.segments();
				while (url == null && entries.hasMoreElements()) {
					URL entry = entries.nextElement();
					IPath path = new Path(entry.getPath());
					if (path.segmentCount() > relativePath.segmentCount()) {
						path = path.removeFirstSegments(path.segmentCount() - relativePath.segmentCount());
					}
					String[] segmentsPath = path.segments();
					boolean equals = segmentsPath.length == segmentsRelativePath.length;
					for (int i = 0; equals && i < segmentsPath.length; i++) {
						equals = segmentsPath[i].equals(segmentsRelativePath[i]);
					}
					if (equals) {
						url = bundle.getEntry(entry.getPath());
					}
				}
			}
		}
		URI result;
		if (url != null) {
			result = URI.createPlatformPluginURI(new Path(bundleID).append(new Path(url.getPath()))
					.toString(), false);
		} else {
			result = URI.createPlatformResourceURI(new Path(bundleID).append(relativePath).toString(), false);
		}
		return result;
	}

}