/*//////////////////////////////////////////////////////////////////////////////
// CMT Cosmic Muon Tomography project //////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////

  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
  All rights reserved

  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >

//////////////////////////////////////////////////////////////////////////////*/

#ifndef U_VTK_ASSEMBLY_H
#define U_VTK_ASSEMBLY_H

#include "Math/Assembly.h"
#include "uLibVtkInterface.h"

class vtkActor;
class vtkAssembly;  // VTK library forward declaration (must be before namespace)

namespace uLib {
namespace Vtk {

class vtkObjectsContext; // forward

/**
 * @brief VTK Puppet for visualizing uLib::Assembly.
 *
 * Manages a VTK assembly (vtkAssembly from the VTK library) that groups
 * all child puppets and applies the Assembly's AffineTransform. It also
 * renders an optional bounding box wireframe computed from the Assembly's AABB.
 *
 * @note This class is uLib::Vtk::Assembly. It internally uses
 *       the VTK library class vtkAssembly for grouping, but the two
 *       are distinct.
 */
class Assembly : public Puppet {
public:
    virtual const char *GetClassName() const override { return "Vtk.Assembly"; }

    Assembly(uLib::Assembly *content);
    virtual ~Assembly();

    /** @brief Updates the VTK representation from the model (model→VTK). */
    virtual void Update() override;

    /** @brief Synchronizes the model from the VTK representation (VTK→model). */
    virtual void SyncFromVtk() override;

    virtual uLib::Object* GetContent() const override { return (uLib::Object*)m_Content; }
    virtual uLib::ObjectsContext* GetChildren() override { return (uLib::ObjectsContext*)m_Content; }

    /**
     * @brief Returns the puppet managing child objects.
     */

    /** @brief Returns the puppet managing child objects. */
    vtkObjectsContext *GetChildrenContext() const;

private:
    void UpdateBoundingBox();
    void InstallPipe();

    uLib::Assembly     *m_Content;
    vtkObjectsContext  *m_ChildContext;
    vtkActor           *m_BBoxActor;
    ::vtkAssembly      *m_VtkAsm; // VTK library assembly — NOT this class
    bool                m_InUpdate;    // re-entrancy guard
};

} // namespace Vtk
} // namespace uLib

#endif // U_VTK_ASSEMBLY_H