package org.eclipse.e4.languages.javascript.framework.test;

import java.net.URL;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.service.packageadmin.PackageAdmin;

public class Activator implements BundleActivator {

	private static BundleContext context;
	private static PackageAdmin packageAdmin;
	
	static BundleContext getContext() {
		return context;
	}


	public void start(BundleContext bundleContext) throws Exception {
		context = bundleContext;
		packageAdmin = (PackageAdmin) context.getService(context.getServiceReference(PackageAdmin.class.getName()));
	}

	public void stop(BundleContext bundleContext) throws Exception {
		packageAdmin = null;
		context = null;
	}

	public static synchronized Bundle getBundle(String symbolicName) {
		if (packageAdmin == null)
			throw new IllegalStateException("Not started"); //$NON-NLS-1$

		Bundle[] bundles = packageAdmin.getBundles(symbolicName, null);
		if (bundles == null)
			return null;
		//Return the first bundle that is not installed or uninstalled
		for (int i = 0; i < bundles.length; i++) {
			if ((bundles[i].getState() & (Bundle.INSTALLED | Bundle.UNINSTALLED)) == 0) {
				return bundles[i];
			}
		}
		return null;
	}


	public static Collection getFrameworkScripts() {
		Bundle frameworkBundle = Activator.getBundle("org.eclipse.e4.languages.javascript.framework");
		//if (true) return Arrays.asList(new URL[]{frameworkBundle.getEntry("/orion.js")});
		List result = Collections.list(frameworkBundle.findEntries("/scripts", "*.js", false));
		URL global = frameworkBundle.getEntry("/scripts/__global.js");
		result.remove(global);
		result.add(0, global);
		return result;
	}


}