//
   //  ========================================================================
   //  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.osgi.boot;
  
  import java.util.ArrayList;
  import java.util.Dictionary;
  import java.util.HashMap;
  import java.util.Hashtable;
  import java.util.List;
  import java.util.Map;
  
  import org.eclipse.jetty.deploy.App;
  import org.eclipse.jetty.deploy.DeploymentManager;
  import org.eclipse.jetty.osgi.boot.internal.serverfactory.ServerInstanceWrapper;
  import org.eclipse.jetty.osgi.boot.utils.EventSender;
  import org.eclipse.jetty.server.handler.ContextHandler;
  import org.eclipse.jetty.util.log.Log;
  import org.eclipse.jetty.util.log.Logger;
  import org.eclipse.jetty.webapp.WebAppContext;
  import org.osgi.framework.Bundle;
  import org.osgi.framework.FrameworkUtil;
  import org.osgi.framework.ServiceReference;
  import org.osgi.framework.ServiceRegistration;
  
  
  
  /**
   * BundleContextProvider
   *
   * Handles deploying bundles that define a context xml file for configuring them.
   * 
   *
   */
  public class BundleContextProvider extends AbstractContextProvider implements BundleProvider
  {    
      private static final Logger LOG = Log.getLogger(AbstractContextProvider.class);
      
  
      private Map<String, App> _appMap = new HashMap<String, App>();
      
      private Map<Bundle, List<App>> _bundleMap = new HashMap<Bundle, List<App>>();
      
      private ServiceRegistration _serviceRegForBundles;
      
  
      
    
      /* ------------------------------------------------------------ */
      public BundleContextProvider(ServerInstanceWrapper wrapper)
      {
          super(wrapper);
      }
      
      
      /* ------------------------------------------------------------ */
      @Override
      protected void doStart() throws Exception
      {
          //register as an osgi service for deploying contexts defined in a bundle, advertising the name of the jetty Server instance we are related to
          Dictionary<String,String> properties = new Hashtable<String,String>();
          properties.put(OSGiServerConstants.MANAGED_JETTY_SERVER_NAME, getServerInstanceWrapper().getManagedServerName());
          _serviceRegForBundles = FrameworkUtil.getBundle(this.getClass()).getBundleContext().registerService(BundleProvider.class.getName(), this, properties);
          super.doStart();
      }
  
      /* ------------------------------------------------------------ */
      @Override
      protected void doStop() throws Exception
      {
          //unregister ourselves
          if (_serviceRegForBundles != null)
          {
              try
              {
                  _serviceRegForBundles.unregister();
              }
              catch (Exception e)
              {
                  LOG.warn(e);
              }
          }
      }
  
 
 
 
     /* ------------------------------------------------------------ */
     /**
      * @param bundle
      * @param contextFiles
      * @return
      */
     public boolean bundleAdded (Bundle bundle) throws Exception
     {
         if (bundle == null)
             return false;
 
         String contextFiles  = (String)bundle.getHeaders().get(OSGiWebappConstants.JETTY_CONTEXT_FILE_PATH);
         if (contextFiles == null)
             contextFiles = (String)bundle.getHeaders().get(OSGiWebappConstants.SERVICE_PROP_CONTEXT_FILE_PATH);
         
         if (contextFiles == null)
             return false;
         
         boolean added = false;
         //bundle defines JETTY_CONTEXT_FILE_PATH header,
         //a comma separated list of context xml files that each define a ContextHandler
         //TODO: (could be WebAppContexts)       
         String[] tmp = contextFiles.split(",;");
         for (String contextFile : tmp)
         {
             String originId = bundle.getSymbolicName() + "-" + bundle.getVersion().toString() + "-"+contextFile;
             OSGiApp app = new OSGiApp(getDeploymentManager(), this, originId, bundle, contextFile);
             _appMap.put(originId,app);
             List<App> apps = _bundleMap.get(bundle);
             if (apps == null)
             {
                 apps = new ArrayList<App>();
                 _bundleMap.put(bundle, apps);
             }
             apps.add(app);
             getDeploymentManager().addApp(app);
         }
 
         return added; //true if even 1 context from this bundle was added
     }
     
     
     /* ------------------------------------------------------------ */
     /** 
      * Bundle has been removed. If it was a context we deployed, undeploy it.
      * @param bundle
      * 
      * @return true if this was a context we had deployed, false otherwise
      */
     public boolean bundleRemoved (Bundle bundle) throws Exception
     {
         List<App> apps = _bundleMap.remove(bundle);
         boolean removed = false;
         if (apps != null)
         {
             for (App app:apps)
             {
                 _appMap.remove(app.getOriginId());
                 getDeploymentManager().removeApp(app);
                 removed = true;
             }
         }
         return removed; //true if even 1 context was removed associated with this bundle
     }
     
    
 }