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

  Library:   CTK
 
  Copyright (c) 2010  Kitware 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.commontk.org/LICENSE

  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.
 
=========================================================================*/
/*=========================================================================
  
  Program:   ParaView
  Module:    $RCSfile: vtkCommandOptions.h,v $

  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.

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

#ifndef __ctkVTKCommandOptions_h
#define __ctkVTKCommandOptions_h

// Qt includes
#include <QStringList>

// CTK includes
#include <ctkPimpl.h>

// STD includes
#include <vector>
#include <string>

#include "CTKVisualizationVTKCoreExport.h"

class QSettings;
class ctkVTKCommandOptionsPrivate;

class CTK_VISUALIZATION_VTK_CORE_EXPORT ctkVTKCommandOptions
{
public:
  /// Constructors
  explicit ctkVTKCommandOptions(QSettings* _settings);
  virtual ~ctkVTKCommandOptions();

  virtual void printAdditionalInfo();

  enum
  {
    ALL = 0,
    QSETTINGS_ONLY = 0x1
  };

  ///
  /// Parse the arguments
  bool parse(int argc, const char* const argv[]);

  ///
  /// If parse return False, this function will return the unparsed arguments
  QStringList remainingArguments();
  void remainingArguments(int* argc, char*** argv);

  ///
  /// Return True if flag '--ignore-rest' has been specified
  bool ignoreRest()const;

  ///
  /// If any, return the list of ignored arguments
  QStringList ignoredArguments()const;

  ///
  /// Get the index of the last parsed argument.
  int indexOfLastParsedArgument();
  
  ///
  /// Was help selected?
  bool helpSelected()const;
  QString help(); 

  ///
  /// Should user settings be considered ?
  bool disableSettings()const;

  ///
  /// Set/Get the type of the process for this set of options.
  /// GUI application, Batch, Daemon, etc ...
  int processType()const;
  void setProcessType(int p);

  ///
  /// Convenient method to get associated Settings object
  QSettings* settings()const;

  ///
  /// In case of unknown argument, return its name.
  QString unknownArgument()const;

  ///
  /// Get the error message if Parse returned 0.
  QString errorMessage()const;

protected:
  
  /// Add a command line argument.
  /// For each argument added there is a long version --long and a short version -l,
  /// a help string, and a variable that is set to the value of the option.
  /// The types can be int, QString, boolean (set to 1 if argument is present) or QStringList.
  /// Also deprecated arguments can be added with only a help string.  The help
  /// string should say that the argument is deprecated and suggest the
  /// alternative argument to use.
  void addBooleanArgument(const char* longarg, const char* shortarg,
                          bool* var, const char* arghelp, bool defaultValue = false,
                          int type=ALL);
  void addDeprecatedArgument(const char* longarg, const char* shortarg,
                             const char* arghelp, int type=ALL);
  void addArgument(const char* longarg, const char* shortarg,
                   int* var, const char* arghelp, int defaultValue = 0, int type=ALL);
  void addArgument(const char* longarg, const char* shortarg,
                   QString* var, const char* arghelp,
                   const QString& defaultValue = QString(), int type=ALL);
  void addArgument(const char* longarg, const char* shortarg,
                   QStringList* var, const char* arghelp,
                   const QStringList& defaultValue = QStringList(), int type=ALL);


  /// Initialize arguments.
  virtual void initialize();

  /// Disable current settings
  virtual void disableCurrentSettings() = 0;
  
  ///
  /// After parsing, process extra option dependencies.
  virtual bool postProcess(int argc, const char* const* argv);

  /// This method is called when wrong argument is found. If it returns False, then
  /// the parsing will fail.
  virtual bool wrongArgument(const char* argument);

  /// This method is called when a deprecated argument is found. If it returns False, then
  /// the parsing will fail.
  virtual bool deprecatedArgument(const char* argument);
  
private:
  CTK_DECLARE_PRIVATE(ctkVTKCommandOptions);
}; 

#endif