/*
 * Copyright (c) 2014-2017 Eike Stepper (Loehne, Germany) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 *
 * Contributors:
 *    Eike Stepper - initial API and implementation
 */
package org.eclipse.oomph.setup.ui;

import org.eclipse.oomph.base.Annotation;
import org.eclipse.oomph.base.BaseFactory;
import org.eclipse.oomph.base.BasePackage;
import org.eclipse.oomph.internal.setup.SetupPrompter;
import org.eclipse.oomph.internal.setup.SetupProperties;
import org.eclipse.oomph.internal.ui.OomphPreferencePage;
import org.eclipse.oomph.internal.ui.TaskItemDecorator;
import org.eclipse.oomph.jreinfo.ui.JREInfoUIPlugin;
import org.eclipse.oomph.p2.core.Agent;
import org.eclipse.oomph.p2.core.BundlePool;
import org.eclipse.oomph.p2.core.P2Util;
import org.eclipse.oomph.p2.core.Profile;
import org.eclipse.oomph.p2.internal.ui.P2UIPlugin;
import org.eclipse.oomph.preferences.util.PreferencesUtil;
import org.eclipse.oomph.setup.SetupTask;
import org.eclipse.oomph.setup.SetupTaskContext;
import org.eclipse.oomph.setup.Trigger;
import org.eclipse.oomph.setup.VariableTask;
import org.eclipse.oomph.setup.VariableType;
import org.eclipse.oomph.setup.internal.core.SetupContext;
import org.eclipse.oomph.setup.internal.core.SetupCorePlugin;
import org.eclipse.oomph.setup.internal.core.SetupTaskPerformer;
import org.eclipse.oomph.setup.internal.core.util.ECFURIHandlerImpl;
import org.eclipse.oomph.setup.internal.core.util.ECFURIHandlerImpl.CacheHandling;
import org.eclipse.oomph.setup.internal.core.util.ResourceMirror;
import org.eclipse.oomph.setup.internal.core.util.SetupCoreUtil;
import org.eclipse.oomph.setup.internal.sync.Synchronization;
import org.eclipse.oomph.setup.p2.provider.SetupP2EditPlugin;
import org.eclipse.oomph.setup.p2.util.P2TaskUISevices;
import org.eclipse.oomph.setup.provider.SetupEditPlugin;
import org.eclipse.oomph.setup.ui.recorder.RecorderManager;
import org.eclipse.oomph.setup.ui.synchronizer.SynchronizerManager;
import org.eclipse.oomph.setup.ui.synchronizer.SynchronizerManager.SynchronizationController;
import org.eclipse.oomph.setup.ui.synchronizer.SynchronizerPreferencePage;
import org.eclipse.oomph.setup.ui.wizards.SetupWizard;
import org.eclipse.oomph.setup.util.SetupUtil;
import org.eclipse.oomph.ui.OomphUIPlugin;
import org.eclipse.oomph.ui.UIUtil;
import org.eclipse.oomph.util.IOUtil;
import org.eclipse.oomph.util.MonitorUtil;
import org.eclipse.oomph.util.OS;
import org.eclipse.oomph.util.PropertiesUtil;
import org.eclipse.oomph.util.ReflectUtil;
import org.eclipse.oomph.util.StringUtil;
import org.eclipse.oomph.util.UserCallback;

import org.eclipse.emf.common.CommonPlugin;
import org.eclipse.emf.common.ui.EclipseUIPlugin;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.common.util.ResourceLocator;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.URIConverter;
import org.eclipse.emf.ecore.util.EcoreUtil;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.equinox.p2.engine.IProfile;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.preference.PreferenceManager;
import org.eclipse.jface.text.templates.ContextTypeRegistry;
import org.eclipse.jface.text.templates.SimpleTemplateVariableResolver;
import org.eclipse.jface.text.templates.TemplateContext;
import org.eclipse.jface.text.templates.TemplateContextType;
import org.eclipse.jface.text.templates.TemplateVariableResolver;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

import org.osgi.framework.BundleContext;

import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

/**
 * @author Eike Stepper
 */
public final class SetupUIPlugin extends OomphUIPlugin
{
  public static final SetupUIPlugin INSTANCE = new SetupUIPlugin();

  public static final String PLUGIN_ID = INSTANCE.getSymbolicName();

  public static final String PREF_HEADLESS = "headless.startup";

  public static final String PREF_SKIP_STARTUP_TASKS = "skip.startup.tasks";

  public static final String PREF_P2_STARTUP_TASKS = "p2.startup.tasks";

  public static final String PREF_ENABLE_PREFERENCE_RECORDER = "enable.preference.recorder";

  public static final String PREF_PREFERENCE_RECORDER_TARGET = "preference.recorder.target";

  public static final String PREF_INITIALIZED_PREFERENCE_PAGES = "initialized.preference.pages";

  public static final String PREF_IGNORED_PREFERENCE_PAGES = "ingored.preference.pages";

  public static final boolean QUESTIONNAIRE_SKIP = PropertiesUtil.isProperty(SetupProperties.PROP_SETUP_QUESTIONNAIRE_SKIP);

  private static final String RESTARTING_FILE_NAME = "restarting";

  private static final String ANNOTATION_SOURCE_INITIAL = "initial";

  private static final String ANNOTATION_DETAILS_KEY_OFFLINE = "offline";

  private static final String ANNOTATION_DETAILS_KEY_MIRRORS = "mirrors";

  private static final boolean SETUP_SKIP = PropertiesUtil.isProperty(SetupProperties.PROP_SETUP_SKIP);

  private static Implementation plugin;

  public SetupUIPlugin()
  {
    super(new ResourceLocator[] { JREInfoUIPlugin.INSTANCE, SetupEditPlugin.INSTANCE, SetupCorePlugin.INSTANCE, SetupP2EditPlugin.INSTANCE,
        P2UIPlugin.INSTANCE });
  }

  @Override
  public ResourceLocator getPluginResourceLocator()
  {
    return plugin;
  }

  public static void initialStart(File ws, boolean offline, boolean mirrors)
  {
    Annotation annotation = BaseFactory.eINSTANCE.createAnnotation();
    annotation.setSource(ANNOTATION_SOURCE_INITIAL);
    annotation.getDetails().put(ANNOTATION_DETAILS_KEY_OFFLINE, Boolean.toString(offline));
    annotation.getDetails().put(ANNOTATION_DETAILS_KEY_MIRRORS, Boolean.toString(mirrors));

    File file = new File(ws, ".metadata/.plugins/" + SetupUIPlugin.INSTANCE.getSymbolicName() + "/" + RESTARTING_FILE_NAME);
    saveRestartFile(file, annotation);
  }

  public static void restart(Trigger trigger, EList<SetupTask> setupTasks)
  {
    if (!setupTasks.isEmpty())
    {
      Annotation annotation = BaseFactory.eINSTANCE.createAnnotation();
      annotation.setSource(trigger.toString());
      annotation.getReferences().addAll(setupTasks);

      saveRestartFile(getRestartingFile(), annotation);
    }

    PlatformUI.getWorkbench().restart();
  }

  private static void saveRestartFile(File file, Annotation annotation)
  {
    try
    {
      Resource resource = SetupCoreUtil.createResourceSet().createResource(URI.createFileURI(file.toString()));
      resource.getContents().add(annotation);
      resource.save(Collections.singletonMap(Resource.OPTION_SAVE_ONLY_IF_CHANGED, Resource.OPTION_SAVE_ONLY_IF_CHANGED_MEMORY_BUFFER));
    }
    catch (Exception ex)
    {
      // Ignore
    }
  }

  public static boolean isSkipStartupTasks()
  {
    return plugin.getPreferenceStore().getBoolean(PREF_SKIP_STARTUP_TASKS);
  }

  private static File getRestartingFile()
  {
    return new File(INSTANCE.getStateLocation().toString(), RESTARTING_FILE_NAME);
  }

  static void performStartup()
  {
    if (!PropertiesUtil.isProperty(PREF_HEADLESS) && !SetupUtil.SETUP_ARCHIVER_APPLICATION)
    {
      // These are only to force class loading on a background thread.
      final boolean synchronizerAvailable = SynchronizerManager.Availability.AVAILABLE;
      SetupTaskPerformer.RULE_VARIABLE_ADAPTER.toString();
      RecorderManager.INSTANCE.toString();

      final Display display = Display.getDefault();
      display.asyncExec(new Runnable()
      {
        public void run()
        {
          if (!SetupUtil.INSTALLER_APPLICATION)
          {
            initJDTTemplateVariables();
            SetupPropertyTester.setStarting(true);

            final IWorkbench workbench = PlatformUI.getWorkbench();
            IExtensionTracker extensionTracker = workbench.getExtensionTracker();
            if (extensionTracker == null || workbench.getWorkbenchWindowCount() == 0)
            {
              display.timerExec(1000, this);
            }
            else
            {
              if (!synchronizerAvailable || !SynchronizerManager.ENABLED)
              {
                PreferenceManager preferenceManager = workbench.getPreferenceManager();
                preferenceManager.remove("/" + OomphPreferencePage.ID + "/" + SetupPreferencePage.ID + "/" + SynchronizerPreferencePage.ID);
              }

              if (SetupTaskPerformer.REMOTE_DEBUG)
              {
                MessageDialog.openInformation(UIUtil.getShell(), "Remote Debug Pause", "The setup tasks are paused to allow you to attach a remote debugger");
              }

              if (Platform.OS_MACOSX.equals(Platform.getOS()))
              {
                new TaskItemDecorator();
              }

              RecorderManager.Lifecycle.start(display);
              plugin.stopRecorder = true;

              if (!SETUP_SKIP && (!isSkipStartupTasks() || getRestartingFile().exists()))
              {
                new Job("Setup check")
                {
                  @Override
                  protected IStatus run(IProgressMonitor monitor)
                  {
                    try
                    {
                      performStartup(workbench, monitor);
                      return Status.OK_STATUS;
                    }
                    finally
                    {
                      SetupPropertyTester.setStarting(false);
                    }
                  }
                }.schedule();
              }
              else
              {
                Job mirrorJob = new Job("Initialize Setup Models")
                {
                  @Override
                  protected IStatus run(IProgressMonitor monitor)
                  {
                    try
                    {
                      monitor.beginTask("Loading resources", 10);

                      ResourceSet resourceSet = SetupCoreUtil.createResourceSet();
                      resourceSet.getLoadOptions().put(ECFURIHandlerImpl.OPTION_CACHE_HANDLING, CacheHandling.CACHE_WITHOUT_ETAG_CHECKING);
                      mirror(resourceSet, monitor, 10);
                      SetupContext.setSelf(SetupContext.createSelf(resourceSet));

                      return Status.OK_STATUS;
                    }
                    finally
                    {
                      SetupPropertyTester.setStarting(false);
                    }
                  }
                };

                mirrorJob.schedule();
              }
            }
          }
        }
      });
    }
  }

  private static void initJDTTemplateVariables()
  {
    // Modify the JDT's variable resolvers so that ${user} expands to a property author name,
    // not simply to the System.getProperty("user.name") which is the account name and generally not appropriate as the author name.
    try
    {
      boolean hasJDTUserName = !StringUtil.isEmpty(System.getProperty("jdt.user.name"));
      Class<?> javaUIPluginClass = CommonPlugin.loadClass("org.eclipse.jdt.ui", "org.eclipse.jdt.internal.ui.JavaPlugin");
      Object javaUIPlugin = ReflectUtil.invokeMethod("getDefault", javaUIPluginClass);
      ContextTypeRegistry codeTemplateContextRegistry = ReflectUtil.invokeMethod("getCodeTemplateContextRegistry", javaUIPlugin);

      for (@SuppressWarnings("all")
      Iterator<TemplateContextType> it = codeTemplateContextRegistry.contextTypes(); it.hasNext();)
      {
        TemplateContextType templateContextType = it.next();
        for (@SuppressWarnings("all")
        Iterator<TemplateVariableResolver> it2 = templateContextType.resolvers(); it2.hasNext();)
        {
          TemplateVariableResolver templateVariableResolver = it2.next();
          if ("user".equals(templateVariableResolver.getType()))
          {
            if (hasJDTUserName)
            {
              templateContextType.addResolver(new SimpleTemplateVariableResolver(templateVariableResolver.getType(), templateVariableResolver.getDescription())
              {
                @Override
                protected String resolve(TemplateContext context)
                {
                  return PropertiesUtil.getProperty("jdt.user.name", PropertiesUtil.getProperty("user.name"));
                }
              });
            }

            templateContextType
                .addResolver(new SimpleTemplateVariableResolver("location", "The user location as specified by the system property 'jdt.user.location'")
                {
                  @Override
                  protected String resolve(TemplateContext context)
                  {
                    String result = PropertiesUtil.getProperty("jdt.user.location", "");
                    if (!StringUtil.isEmpty(result) && !result.startsWith(" "))
                    {
                      result = " " + result;
                    }

                    return result;
                  }
                });

            break;
          }
        }
      }
    }
    catch (Throwable ex)
    {
      // Ignore if anything goes wrong registering our variable resolvers.
    }
  }

  private static void mirror(final ResourceSet resourceSet, IProgressMonitor monitor, int work)
  {
    ResourceMirror resourceMirror = new ResourceMirror(resourceSet)
    {
      @Override
      protected void run(String taskName, IProgressMonitor monitor)
      {
        List<URI> uris = new ArrayList<URI>();
        URIConverter uriConverter = resourceSet.getURIConverter();
        for (URI uri : new URI[] { SetupContext.INSTALLATION_SETUP_URI, SetupContext.WORKSPACE_SETUP_URI, SetupContext.USER_SETUP_URI })
        {
          if (uri != null && uriConverter.exists(uri, null))
          {
            uris.add(uri);
          }
        }

        perform(uris);
        resolveProxies();
      }
    };

    resourceMirror.begin(MonitorUtil.create(monitor, work));
  }

  private static Set<? extends EObject> checkCrossReferences(ResourceSet resourceSet, URI uri)
  {
    Set<EObject> result = new HashSet<EObject>();

    Resource resource = resourceSet.getResource(uri, false);
    if (resource != null)
    {
      EList<EObject> contents = resource.getContents();
      if (!contents.isEmpty())
      {
        EObject eObject = contents.get(0);
        for (EObject eCrossReference : eObject.eCrossReferences())
        {
          Resource eResource = eCrossReference.eResource();
          if (eResource != null)
          {
            for (EObject content : eResource.getContents())
            {
              EObject eContainer = content.eContainer();
              if (eContainer != null)
              {
                result.add(eContainer);
              }
            }

            eResource.unload();
          }
        }
      }
    }

    return result;
  }

  private static void performStartup(final IWorkbench workbench, IProgressMonitor monitor)
  {
    // TODO Remove the following try/catch block after bug 485018 has been fixed.
    try
    {
      Agent currentAgent = P2Util.getAgentManager().getCurrentAgent();
      if (currentAgent != null)
      {
        Profile currentProfile = currentAgent.getCurrentProfile();
        if (currentProfile != null)
        {
          BundlePool bundlePool = currentProfile.getBundlePool();
          if (bundlePool != null)
          {
            File bundlePoolLocation = bundlePool.getLocation();
            if (bundlePoolLocation != null)
            {
              String installFolderLocation = currentProfile.getProperty(IProfile.PROP_INSTALL_FOLDER);
              if (installFolderLocation != null && !bundlePoolLocation.equals(new File(installFolderLocation)))
              {
                File eclipseExtensionFeaturesFolder = new File(bundlePoolLocation, ".eclipseextension/features");
                eclipseExtensionFeaturesFolder.mkdirs();
              }
            }
          }
        }
      }

      Profile currentProfile = P2Util.getAgentManager().getCurrentAgent().getCurrentProfile();
      String installFolderLocation = currentProfile != null ? currentProfile.getProperty(IProfile.PROP_INSTALL_FOLDER) : null;
      if (installFolderLocation != null)
      {
        BundlePool bundlePool = currentProfile.getBundlePool();
        File bundlePoolLocation = bundlePool.getLocation();

        if (!bundlePoolLocation.equals(new File(installFolderLocation)))
        {
          File eclipseExtensionFeaturesFolder = new File(bundlePoolLocation, ".eclipseextension/features");
          eclipseExtensionFeaturesFolder.mkdirs();
        }
      }
    }
    catch (Throwable throwable)
    {
      SetupUIPlugin.INSTANCE.log(throwable, IStatus.WARNING);
    }

    monitor.beginTask("", 105);
    Trigger trigger = Trigger.STARTUP;
    boolean restarting = false;
    Set<URI> neededRestartTasks = new HashSet<URI>();

    try
    {
      File restartingFile = getRestartingFile();
      if (restartingFile.exists())
      {
        monitor.setTaskName("Loading restart tasks " + restartingFile);
        Resource resource = SetupCoreUtil.createResourceSet().getResource(URI.createFileURI(restartingFile.toString()), true);

        Annotation annotation = (Annotation)EcoreUtil.getObjectByType(resource.getContents(), BasePackage.Literals.ANNOTATION);
        resource.getContents().remove(annotation);

        if (ANNOTATION_SOURCE_INITIAL.equals(annotation.getSource()))
        {
          if ("true".equals(annotation.getDetails().get(ANNOTATION_DETAILS_KEY_OFFLINE)))
          {
            System.setProperty(SetupProperties.PROP_SETUP_OFFLINE_STARTUP, "true");
          }

          if ("true".equals(annotation.getDetails().get(ANNOTATION_DETAILS_KEY_MIRRORS)))
          {
            System.setProperty(SetupProperties.PROP_SETUP_MIRRORS_STARTUP, "true");
          }
        }
        else
        {
          for (EObject eObject : annotation.getReferences())
          {
            neededRestartTasks.add(EcoreUtil.getURI(eObject));
          }

          trigger = Trigger.get(annotation.getSource());
          restarting = true;
        }

        IOUtil.deleteBestEffort(restartingFile);
      }
    }
    catch (Exception ex)
    {
      // Ignore
    }

    monitor.worked(1);

    // Disabled for bug 459486:
    // if (!QUESTIONNAIRE_SKIP)
    // {
    // Questionnaire.perform(UIUtil.getShell(), false);
    // }

    // This performer is only used to detect a need to update or to open the setup wizard.
    SetupTaskPerformer performer = null;
    final ResourceSet resourceSet = SetupCoreUtil.createResourceSet();

    SynchronizationController synchronizationController = null;

    if (SynchronizerManager.Availability.AVAILABLE)
    {
      try
      {
        synchronizationController = SynchronizerManager.INSTANCE.startSynchronization(false, false, false);
      }
      catch (Exception ex)
      {
        INSTANCE.log(ex);
      }
    }

    monitor.setTaskName("Creating a setup task performer");

    try
    {
      // Ensure that the demand created resources for the installation, workspace, and user are loaded and created.
      // Load the resource set quickly without doing ETag checking.
      resourceSet.getLoadOptions().put(ECFURIHandlerImpl.OPTION_CACHE_HANDLING, CacheHandling.CACHE_WITHOUT_ETAG_CHECKING);
      mirror(resourceSet, monitor, 25);

      // Check the installation and workspace resources for cross references.
      // This unloads the cross referenced resources and returns the container objects of the root object(s) of those resources.
      Set<EObject> eContainers = new HashSet<EObject>();
      eContainers.addAll(checkCrossReferences(resourceSet, SetupContext.INSTALLATION_SETUP_URI));
      if (SetupContext.WORKSPACE_SETUP_URI != null)
      {
        eContainers.addAll(checkCrossReferences(resourceSet, SetupContext.WORKSPACE_SETUP_URI));
      }

      if (!eContainers.isEmpty())
      {
        // Reload any resources that have been unloaded, this time with ETag checking.
        resourceSet.getLoadOptions().put(ECFURIHandlerImpl.OPTION_CACHE_HANDLING, CacheHandling.CACHE_WITH_ETAG_CHECKING);
        mirror(resourceSet, monitor, 75);

        // Resolve the containment proxies of the containers.
        for (EObject eContainer : eContainers)
        {
          for (@SuppressWarnings("unused")
          EObject eObject : eContainer.eContents())
          {
            // Resolve all containment proxies.
          }
        }
      }
      else
      {
        monitor.worked(75);
      }

      try
      {
        if (synchronizationController != null)
        {
          Synchronization synchronization = synchronizationController.await();
          if (synchronization != null)
          {
            SynchronizerManager.INSTANCE.performSynchronization(synchronization, false, false);
          }
        }
      }
      catch (Exception ex)
      {
        INSTANCE.log(ex);
      }

      // Create a prompter that generally cancels except if all prompted variables are passwords.
      SetupPrompter prompter = new SetupPrompter()
      {
        public OS getOS()
        {
          return OS.INSTANCE;
        }

        public String getVMPath()
        {
          return null;
        }

        public boolean promptVariables(List<? extends SetupTaskContext> contexts)
        {
          @SuppressWarnings("unchecked")
          List<SetupTaskPerformer> performers = (List<SetupTaskPerformer>)contexts;
          for (SetupTaskPerformer performer : performers)
          {
            List<VariableTask> unresolvedVariables = performer.getUnresolvedVariables();
            for (VariableTask variable : unresolvedVariables)
            {
              if (variable.getType() == VariableType.PASSWORD)
              {
                variable.setValue(PreferencesUtil.encrypt(" "));
              }
              else
              {
                return false;
              }
            }
          }

          return true;
        }

        public String getValue(VariableTask variable)
        {
          return null;
        }

        public UserCallback getUserCallback()
        {
          return null;
        }
      };

      // Create the performer with a fully populated resource set.
      performer = SetupTaskPerformer.createForIDE(resourceSet, prompter, trigger);

      // If we have a performer...
      if (performer != null)
      {
        // And it has unresolved variables.
        List<VariableTask> unresolvedVariables = performer.getUnresolvedVariables();
        if (!unresolvedVariables.isEmpty())
        {
          // They must be password variables that have been resolved to the encrypted value for " "
          performer.getResolvedVariables().addAll(unresolvedVariables);

          // If we don't clear them, the performer will throw an exception.
          unresolvedVariables.clear();
        }
      }
    }
    catch (OperationCanceledException ex)
    {
      //$FALL-THROUGH$
    }
    catch (Throwable ex)
    {
      INSTANCE.log(ex);
      return;
    }
    finally
    {
      SetupContext.setSelf(SetupContext.createSelf(resourceSet));
    }

    monitor.worked(1);

    if (performer != null)
    {
      monitor.setTaskName("Initializing the setup task performer");

      try
      {
        // At this point we know that no prompt was needed.
        performer.put(P2TaskUISevices.class, new P2TaskUIServicesPrompter());
        EList<SetupTask> neededTasks = performer.initNeededSetupTasks(MonitorUtil.create(monitor, 2));
        if (restarting)
        {
          for (Iterator<SetupTask> it = neededTasks.iterator(); it.hasNext();)
          {
            SetupTask setupTask = it.next();
            if (setupTask.getPriority() == SetupTask.PRIORITY_INSTALLATION || !neededRestartTasks.contains(EcoreUtil.getURI(setupTask)))
            {
              it.remove();
            }
          }
        }

        if (neededTasks.isEmpty())
        {
          // No tasks are needed, either. Nothing to do.
          return;
        }

        performer.setSkipConfirmation(true);
      }
      catch (Throwable ex)
      {
        INSTANCE.log(ex);
        return;
      }
    }
    else
    {
      monitor.worked(2);
    }

    monitor.worked(1);
    monitor.setTaskName("Launching the setup wizard");

    final SetupTaskPerformer finalPerfomer = performer;
    UIUtil.asyncExec(new Runnable()
    {
      public void run()
      {
        if (finalPerfomer != null)
        {
          resourceSet.getResources().add(finalPerfomer.getUser().eResource());
        }

        IWorkbenchWindow workbenchWindow = workbench.getActiveWorkbenchWindow();
        if (workbenchWindow == null)
        {
          IWorkbenchWindow[] workbenchWindows = workbench.getWorkbenchWindows();
          if (workbenchWindows.length > 0)
          {
            workbenchWindow = workbenchWindows[0];
          }
        }

        if (workbenchWindow != null)
        {
          SetupWizard updater = finalPerfomer != null ? new SetupWizard.Updater(finalPerfomer)
              : new SetupWizard.Updater(SetupContext.createInstallationWorkspaceAndUser(resourceSet));
          updater.openDialog(workbenchWindow.getShell());
        }
      }
    });

    monitor.worked(1);
  }

  /**
   * @author Eike Stepper
   */
  public static class Implementation extends EclipseUIPlugin
  {
    private boolean stopRecorder;

    public Implementation()
    {
      plugin = this;
    }

    @Override
    public void start(BundleContext context) throws Exception
    {
      super.start(context);
    }

    @Override
    public void stop(BundleContext context) throws Exception
    {
      if (stopRecorder)
      {
        RecorderManager.Lifecycle.stop();
      }

      super.stop(context);
    }
  }
}