/*=========================================================================

  Program:   ParaView
  Module:    vtkPVPluginsInformation.h

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/**
 * @class   vtkPVPluginsInformation
 * @brief   information about plugins tracked by
 * vtkPVPluginTracker.
 *
 * vtkPVPluginsInformation is used to collect information about plugins tracked
 * by vtkPVPluginTracker.
*/

#ifndef vtkPVPluginsInformation_h
#define vtkPVPluginsInformation_h

#include "vtkPVClientServerCoreCoreModule.h" //needed for exports
#include "vtkPVInformation.h"

class VTKPVCLIENTSERVERCORECORE_EXPORT vtkPVPluginsInformation : public vtkPVInformation
{
public:
  static vtkPVPluginsInformation* New();
  vtkTypeMacro(vtkPVPluginsInformation, vtkPVInformation);
  void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;

  //@{
  /**
   * API to iterate over the information collected for each plugin.
   */
  unsigned int GetNumberOfPlugins();
  const char* GetPluginName(unsigned int);
  const char* GetPluginFileName(unsigned int);
  const char* GetPluginVersion(unsigned int);
  bool GetPluginLoaded(unsigned int);
  const char* GetRequiredPlugins(unsigned int);
  bool GetRequiredOnServer(unsigned int);
  bool GetRequiredOnClient(unsigned int);
  bool GetAutoLoad(unsigned int);
  //@}

  /**
   * Note that unlike other properties, this one is updated as a consequence of
   * calling PluginRequirementsSatisfied().
   */
  const char* GetPluginStatusMessage(unsigned int);

  /**
   * API to change auto-load status.
   */
  void SetAutoLoad(unsigned int cc, bool);

  /**
   * This is a hack. When the user sets an auto-load option from  the GUI to
   * avoid that choice being overwritten as the information object is updated
   * over time as new plugins are loaded/unloaded, the pqPluginDialog uses this
   * method to set the auto-load flag. This flag is not communicated across
   * processes, but when called, GetAutoLoad() will return the value set using
   * this method.
   */
  void SetAutoLoadAndForce(unsigned int cc, bool);

  /**
   * Transfer information about a single object into this object.
   */
  void CopyFromObject(vtkObject*) VTK_OVERRIDE;

  /**
   * Merge another information object.
   */
  void AddInformation(vtkPVInformation*) VTK_OVERRIDE;

  /**
   * Updates the local information with elements from other without overriding
   * auto-load state.
   */
  void Update(vtkPVPluginsInformation* other);

  //@{
  /**
   * Manage a serialized version of the information.
   */
  void CopyToStream(vtkClientServerStream*) VTK_OVERRIDE;
  void CopyFromStream(const vtkClientServerStream*) VTK_OVERRIDE;
  //@}

  //@{
  /**
   * Get the plugin search path.
   */
  vtkGetStringMacro(SearchPaths);
  //@}

  /**
   * Method to validate if the plugin requirements are met across processes.
   * This also updated the "StatusMessage" for all the plugins. If StatusMessage
   * is empty for a loaded plugin, it implies that everything is fine. If some
   * requirement is not met, the StatusMessage includes the error message.
   */
  static bool PluginRequirementsSatisfied(
    vtkPVPluginsInformation* client_plugins, vtkPVPluginsInformation* server_plugins);

protected:
  vtkPVPluginsInformation();
  ~vtkPVPluginsInformation() override;

  char* SearchPaths;
  vtkSetStringMacro(SearchPaths);

private:
  vtkPVPluginsInformation(const vtkPVPluginsInformation&) = delete;
  void operator=(const vtkPVPluginsInformation&) = delete;

  class vtkInternals;
  vtkInternals* Internals;
};

#endif
