/*
    * Copyright (C) 2013 4th Line GmbH, Switzerland
    *
    * The contents of this file are subject to the terms of either the GNU
    * Lesser General Public License Version 2 or later ("LGPL") or the
    * Common Development and Distribution License Version 1 or later
    * ("CDDL") (collectively, the "License"). You may not use this file
    * except in compliance with the License. See LICENSE.txt for more
    * information.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   */
  
  package org.fourthline.cling;
  
  import org.fourthline.cling.controlpoint.ControlPoint;
  import org.fourthline.cling.controlpoint.ControlPointImpl;
  import org.fourthline.cling.protocol.ProtocolFactory;
  import org.fourthline.cling.protocol.ProtocolFactoryImpl;
  import org.fourthline.cling.registry.Registry;
  import org.fourthline.cling.registry.RegistryImpl;
  import org.fourthline.cling.registry.RegistryListener;
  import org.fourthline.cling.transport.Router;
  import org.fourthline.cling.transport.RouterException;
  import org.fourthline.cling.transport.RouterImpl;
  import org.seamless.util.Exceptions;
  
  import javax.enterprise.inject.Alternative;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  
  /**
   * Default implementation of {@link UpnpService}, starts immediately on construction.
   * <p>
   * If no {@link UpnpServiceConfiguration} is provided it will automatically
   * instantiate {@link DefaultUpnpServiceConfiguration}. This configuration <strong>does not
   * work</strong> on Android! Use the {@link org.fourthline.cling.android.AndroidUpnpService}
   * application component instead.
   * </p>
   * <p>
   * Override the various <tt>create...()</tt> methods to customize instantiation of protocol factory,
   * router, etc.
   * </p>
   *
   * @author Christian Bauer
   */
  @Alternative
  public class UpnpServiceImpl implements UpnpService {
  
      private static Logger log = Logger.getLogger(UpnpServiceImpl.class.getName());
  
      protected final UpnpServiceConfiguration configuration;
      protected final ControlPoint controlPoint;
      protected final ProtocolFactory protocolFactory;
      protected final Registry registry;
      protected final Router router;
  
      public UpnpServiceImpl() {
          this(new DefaultUpnpServiceConfiguration());
      }
  
      public UpnpServiceImpl(RegistryListener... registryListeners) {
          this(new DefaultUpnpServiceConfiguration(), registryListeners);
      }
  
      public UpnpServiceImpl(UpnpServiceConfiguration configuration, RegistryListener... registryListeners) {
          this.configuration = configuration;
  
          log.info(">>> Starting UPnP service...");
  
          log.info("Using configuration: " + getConfiguration().getClass().getName());
  
          // Instantiation order is important: Router needs to start its network services after registry is ready
  
          this.protocolFactory = createProtocolFactory();
  
          this.registry = createRegistry(protocolFactory);
          for (RegistryListener registryListener : registryListeners) {
              this.registry.addListener(registryListener);
          }
  
          this.router = createRouter(protocolFactory, registry);
  
          try {
              this.router.enable();
          } catch (RouterException ex) {
              throw new RuntimeException("Enabling network router failed: " + ex, ex);
          }
  
          this.controlPoint = createControlPoint(protocolFactory, registry);
  
          log.info("<<< UPnP service started successfully");
      }
  
      protected ProtocolFactory createProtocolFactory() {
          return new ProtocolFactoryImpl(this);
      }
 
     protected Registry createRegistry(ProtocolFactory protocolFactory) {
         return new RegistryImpl(this);
     }
 
     protected Router createRouter(ProtocolFactory protocolFactory, Registry registry) {
         return new RouterImpl(getConfiguration(), protocolFactory);
     }
 
     protected ControlPoint createControlPoint(ProtocolFactory protocolFactory, Registry registry) {
         return new ControlPointImpl(getConfiguration(), protocolFactory, registry);
     }
 
     public UpnpServiceConfiguration getConfiguration() {
         return configuration;
     }
 
     public ControlPoint getControlPoint() {
         return controlPoint;
     }
 
     public ProtocolFactory getProtocolFactory() {
         return protocolFactory;
     }
 
     public Registry getRegistry() {
         return registry;
     }
 
     public Router getRouter() {
         return router;
     }
 
     synchronized public void shutdown() {
         shutdown(false);
     }
 
     protected void shutdown(boolean separateThread) {
         Runnable shutdown = new Runnable() {
             @Override
             public void run() {
                 log.info(">>> Shutting down UPnP service...");
                 shutdownRegistry();
                 shutdownRouter();
                 shutdownConfiguration();
                 log.info("<<< UPnP service shutdown completed");
             }
         };
         if (separateThread) {
             // This is not a daemon thread, it has to complete!
             new Thread(shutdown).start();
         } else {
             shutdown.run();
         }
     }
 
     protected void shutdownRegistry() {
         getRegistry().shutdown();
     }
 
     protected void shutdownRouter() {
         try {
             getRouter().shutdown();
         } catch (RouterException ex) {
             Throwable cause = Exceptions.unwrap(ex);
             if (cause instanceof InterruptedException) {
                 log.log(Level.INFO, "Router shutdown was interrupted: " + ex, cause);
             } else {
                 log.log(Level.SEVERE, "Router error on shutdown: " + ex, cause);
             }
         }
     }
 
     protected void shutdownConfiguration() {
         getConfiguration().shutdown();
     }
 
 }