/*
 * Copyright @ 2015 - Present, 8x8 Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jitsi.videobridge.rest;

import java.util.*;

import org.eclipse.jetty.server.*;
import org.eclipse.jetty.servlet.*;
import org.glassfish.jersey.servlet.*;
import org.jitsi.rest.*;
import org.jitsi.videobridge.*;
import org.jitsi.videobridge.rest.root.*;
import org.osgi.framework.*;

/**
 * Implements <tt>BundleActivator</tt> for the OSGi bundle which implements a
 * REST API for Videobridge.
 * <p>
 * The REST API of Videobridge is currently served over HTTP on port
 * <tt>8080</tt> by default. The default port value may be overridden by the
 * <tt>System</tt> and <tt>ConfigurationService</tt> property with name
 * <tt>org.jitsi.videobridge.rest.jetty.port</tt>.
 * </p>
 *
 * @author Lyubomir Marinov
 * @author Boris Grozev
 */
public class RESTBundleActivator
    extends AbstractJettyBundleActivator
{

    /**
     * The prefix of the property names for the Jetty instance managed by
     * this {@link AbstractJettyBundleActivator}.
     */
    public static final String JETTY_PROPERTY_PREFIX
        = "org.jitsi.videobridge.rest.private";

    /**
     * Initializes a new {@code RESTBundleActivator} instance.
     */
    public RESTBundleActivator()
    {
        super(JETTY_PROPERTY_PREFIX);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void doStop(BundleContext bundleContext)
        throws Exception
    {
        if (server != null)
        {
            // FIXME graceful Jetty shutdown
            // When shutdown request is accepted, empty response is sent back
            // instead of 200, because Jetty is not being shutdown gracefully.
            Thread.sleep(1000);
        }

        super.doStop(bundleContext);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected Handler initializeHandlerList(
            BundleContext bundleContext,
            Server server)
    {
        ServletContextHandler appHandler = new ServletContextHandler(ServletContextHandler.NO_SESSIONS);
        appHandler.setContextPath("/");
        appHandler.addServlet(new ServletHolder(new ServletContainer(new Application(bundleContext))), "/*");

        return appHandler;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected boolean willStart(BundleContext bundleContext)
        throws Exception
    {
        boolean b = super.willStart(bundleContext);

        if (b)
        {
            // The REST API of Videobridge does not start by default.
            b = getCfgBoolean(Videobridge.REST_API_PNAME, false);
        }
        return b;
    }
}