/*******************************************************************************
 * Copyright (c) 2009 Symbian Foundation and/or its subsidiary(-ies).
 * All rights reserved.
 * This component and the accompanying materials are made available
 * under the terms of the License "Eclipse Public License v1.0"
 * which accompanies this distribution, and is available
 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
 *
 * Initial Contributors:
 * Symbian Foundation - initial contribution.
 * Contributors:
 * Description:
 * Overview:
 * Details:
 * Platforms/Drives/Compatibility:
 * Assumptions/Requirement/Pre-requisites:
 * Failures and causes:
 *******************************************************************************/
package org.symbian.tools.wrttools.previewer.http;

import java.util.Dictionary;
import java.util.Hashtable;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Platform;
import org.eclipse.equinox.http.jetty.JettyConfigurator;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleException;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
import org.osgi.service.http.HttpContext;
import org.osgi.service.http.HttpService;
import org.symbian.tools.wrttools.previewer.PreviewerPlugin;

/**
 * Copy from the WS Explorer
 * 
 * @author Eugene Ostroukhov
 *
 */
public class WebappManager {
	public static final String WORKSPACE_RESOURCES_CONTEXT = "/preview";
	public static final String STATIC_RESOURCES_CONTEXT = "/wrtdebugger";
	public static final String WEB_CONTENT_ROOT = "/http-content";
	
	private static String host;
	private static int port = -1;
	private static final int AUTO_SELECT_JETTY_PORT = 0;
	
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static void start(String webappName) throws Exception {
		Dictionary d = new Hashtable();
		
		d.put("http.port", new Integer(getPortParameter())); //$NON-NLS-1$

		// set the base URL
		d.put("other.info", "org.symbian.wst.debugger"); //$NON-NLS-1$ //$NON-NLS-2$
		
		// suppress Jetty INFO/DEBUG messages to stderr
		Logger.getLogger("org.mortbay").setLevel(Level.WARNING); //$NON-NLS-1$	

		JettyConfigurator.startServer(webappName, d);
		checkBundle();
		Bundle bundle = PreviewerPlugin.getDefault().getBundle();
		HttpService service = (HttpService) bundle.getBundleContext().getService(getServiceReference());
		HttpContext httpContext = service.createDefaultHttpContext();
		service.registerServlet(WORKSPACE_RESOURCES_CONTEXT, new WorkspaceResourcesServlet(), new Hashtable(), httpContext);
	}
	
	/*
	 * Ensures that the bundle with the specified name and the highest available
	 * version is started and reads the port number
	 */
	private static void checkBundle() throws InvalidSyntaxException, BundleException {
		Bundle bundle = Platform.getBundle("org.eclipse.equinox.http.registry"); //$NON-NLS-1$if (bundle != null) {
		if (bundle.getState() == Bundle.RESOLVED) {
			bundle.start(Bundle.START_TRANSIENT);
		}
		if (port == -1) {
			ServiceReference reference = getServiceReference();
			Object assignedPort = reference.getProperty("http.port"); //$NON-NLS-1$
			port = Integer.parseInt((String)assignedPort);
		}
	}

	private static ServiceReference getServiceReference()
			throws InvalidSyntaxException {
		Bundle bundle = PreviewerPlugin.getDefault().getBundle();
		// Jetty selected a port number for us
		ServiceReference[] reference = bundle.getBundleContext().getServiceReferences("org.osgi.service.http.HttpService", "(other.info=org.symbian.wst.debugger)"); //$NON-NLS-1$ //$NON-NLS-2$
		return reference[0];
	}

	public static void stop(String webappName) throws CoreException {
		try {
			JettyConfigurator.stopServer(webappName);
		}
		catch (Exception e) {
			//HelpBasePlugin.logError("An error occured while stopping the help server", e); //$NON-NLS-1$
		}
	}

	public static int getPort() {
		return port;
	}

	/*
	 * Get the port number which will be passed to Jetty
	 */
	private static int getPortParameter() {
		if (port == -1) { 
			return AUTO_SELECT_JETTY_PORT;
		}
		return port;
	}

	public static String getHost() {
		if (host == null) {
			host = "127.0.0.1";
		}
		return host;
	}
	
	private WebappManager() {
	}
	
}