/*******************************************************************************
 * Copyright (c) 2012 BMW Car IT and others.
 * 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
 *******************************************************************************/
package org.jnario.jnario.test.util;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.Platform;
import org.eclipse.osgi.framework.adaptor.BundleData;
import org.eclipse.osgi.framework.internal.core.AbstractBundle;
import org.jnario.Activator;
import org.osgi.framework.BundleException;

/**
 * @author Birgit Engelmann
 */
@SuppressWarnings("restriction")
public class BundleClassPathProvider {
	
	private static final String BUNDLE_REFERENCE = "reference:file:";
	private static final String PLUGIN_CLASSES_FOLDER = "plugins";
	private static final String SYSTEM_BUNDLE = "System Bundle";
	

	
	public static List<String> getClassPath() {
		String installLocation = Platform.getInstallLocation().getURL()
				.getPath();

		AbstractBundle[] bundles = (AbstractBundle[]) Activator.getDefault()
				.getBundle().getBundleContext().getBundles();
		List<String> classpath = new ArrayList<String>();

		for (AbstractBundle bundle : bundles) {
			BundleData bundleData = bundle.getBundleData();
			String pathToBundle = getPathOfBundle(bundleData);
			try {
				for (String subFolders : bundleData.getClassPath()) {
					String fullLocation = pathToBundle + File.separator + subFolders;
					String finalClassPath = getAbsoluteClassPath(fullLocation, installLocation);
					if(finalClassPath.length() > 0){
						if(finalClassPath.endsWith("//.")){
							finalClassPath = finalClassPath.substring(0, finalClassPath.length()-3);
						}else if(finalClassPath.endsWith("/.")){
							finalClassPath = finalClassPath.substring(0, finalClassPath.length()-2);
						}
						classpath.add(finalClassPath.replace("/", File.separator));
					}
				}
			} catch (BundleException e) {
				e.printStackTrace();
			}
		}
		System.out.println(classpath.toString().replace(",", "\n"));
		return classpath;
	}

	private static String getPathOfBundle(BundleData bundleData) {
		String pathOfBundle = bundleData.getLocation();
		int indexOf = pathOfBundle.indexOf(BUNDLE_REFERENCE);
		if (indexOf >= 0) {
			return pathOfBundle.substring(indexOf + BUNDLE_REFERENCE.length());
		}
		return pathOfBundle;
	}
	

	private static String getAbsoluteClassPath(String fullLocation, 
			String installLocation) {
		if (fullLocation.contains(SYSTEM_BUNDLE)) {
			return "";
		}
		if (fullLocation.contains("..")	|| fullLocation.startsWith(PLUGIN_CLASSES_FOLDER)) {
			return installLocation + fullLocation;
		}
		return fullLocation;
	}

}