#ifndef __CPPLUGINS__INTERFACE__PROCESSOBJECT__H__
#define __CPPLUGINS__INTERFACE__PROCESSOBJECT__H__

#include <set>

#include <itkDataObject.h>

#include <cpPlugins/Interface/DataObject.h>
#include <cpPlugins/Interface/Parameters.h>

// Some forward declarations
class vtkRenderWindowInteractor;
#ifdef cpPlugins_Interface_QT4
class QWidget;
#else
typedef char QWidget;
#endif // cpPlugins_Interface_QT4

namespace cpPlugins
{
  namespace Interface
  {
    // Some forward declarations
#ifdef cpPlugins_Interface_QT4
    class ParametersQtDialog;
    class SimpleMPRWidget;
#else
    typedef char ParametersQtDialog;
    typedef char SimpleMPRWidget;
#endif // cpPlugins_Interface_QT4

    /**
     */
    class cpPlugins_Interface_EXPORT ProcessObject
      : public Object
    {
    public:
      typedef ProcessObject                   Self;
      typedef Object                          Superclass;
      typedef itk::SmartPointer< Self >       Pointer;
      typedef itk::SmartPointer< const Self > ConstPointer;

      typedef Parameters TParameters;
      typedef std::set< vtkRenderWindowInteractor* > TInteractors;
      typedef bool DialogResult;

    public:
      itkTypeMacro( ProcessObject, Object );
      cpPlugins_Id_Macro( ProcessObject, BaseObject );

      itkBooleanMacro( Interactive );
      itkGetConstMacro( Interactive, bool );
      itkSetMacro( Interactive, bool );

      itkGetConstObjectMacro( Parameters, TParameters );
      itkGetObjectMacro( Parameters, TParameters );

    public:
      virtual std::set< std::string > GetInputsNames( ) const;
      virtual std::set< std::string > GetOutputsNames( ) const;
      unsigned int GetNumberOfInputs( ) const;
      unsigned int GetNumberOfOutputs( ) const;

      virtual bool SetInput( const std::string& id, DataObject::Pointer* dobj );

      virtual std::string Update( );
      virtual void DisconnectOutputs( );

      // Widgets management
      vtkRenderWindowInteractor* GetSingleInteractor( );
      const vtkRenderWindowInteractor* GetSingleInteractor( ) const;
      void SetSingleInteractor( vtkRenderWindowInteractor* interactor );
      SimpleMPRWidget* GetMPRViewer( );
      const SimpleMPRWidget* GetMPRViewer( ) const;
      void SetMPRViewer( SimpleMPRWidget* wdg );
      virtual bool ExecConfigurationDialog( QWidget* parent );

      template< class T >
        inline T* GetInputData( const std::string& id );

      template< class T >
        inline const T* GetInputData( const std::string& id ) const;

      template< class T >
        inline T* GetOutputData( const std::string& id );

      template< class T >
        inline const T* GetOutputData( const std::string& id ) const;

      DataObject::Pointer* GetOutputPort( const std::string& id )
      {
        auto i = this->m_Outputs.find( id );
        if( i != this->m_Outputs.end( ) )
          return( i->second );
        else
          return( NULL );
      }

      const DataObject::Pointer* GetOutputPort( const std::string& id ) const
      {
        auto i = this->m_Outputs.find( id );
        if( i != this->m_Outputs.end( ) )
          return( i->second );
        else
          return( NULL );
      }

    protected:
      ProcessObject( );
      virtual ~ProcessObject( );

      virtual void _AddInput( const std::string& name );

      template< class O >
        inline void _AddOutput( const std::string& id );

      template< class F >
        inline F* _CreateITK( );

      template< class F >
        inline F* _CreateVTK( );

      virtual std::string _GenerateData( ) = 0;

    private:
      // Purposely not implemented
      ProcessObject( const Self& );
      Self& operator=( const Self& );

    protected:
      Parameters::Pointer m_Parameters;
      ParametersQtDialog* m_ParametersDialog;

      vtkSmartPointer< vtkRenderWindowInteractor > m_SingleInteractor;
      SimpleMPRWidget*                             m_MPRViewer;
      bool                                         m_Interactive;

      typedef std::map< std::string, DataObject::Pointer* > _TDataContainer;
      _TDataContainer m_Inputs;
      _TDataContainer m_Outputs;
    };

  } // ecapseman

} // ecapseman

#include <cpPlugins/Interface/ProcessObject.hxx>

#endif // __CPPLUGINS__INTERFACE__PROCESSOBJECT__H__

// eof - $RCSfile$