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//
// G4BooleanSolid
//
// Class description:
//
// Abstract base class for solids created by boolean operations
// between other solids.

// 10.09.98 V.Grichine - created
// --------------------------------------------------------------------
#ifndef G4BOOLEANSOLID_HH
#define G4BOOLEANSOLID_HH

#include "G4DisplacedSolid.hh"

#include "G4ThreeVector.hh"
#include "G4RotationMatrix.hh"
#include "G4Transform3D.hh"

#include "G4VBooleanProcessor.hh"

class HepPolyhedronProcessor;


class G4BooleanSolid : public G4VSolid
{
  public:
 
    G4BooleanSolid( const G4String& pName,
                          G4VSolid* pSolidA ,
                          G4VSolid* pSolidB   );

    G4BooleanSolid( const G4String& pName,
                          G4VSolid* pSolidA ,
                          G4VSolid* pSolidB,
                          G4RotationMatrix* rotMatrix,
                    const G4ThreeVector& transVector    );

    G4BooleanSolid( const G4String& pName,
                          G4VSolid* pSolidA ,
                          G4VSolid* pSolidB , 
                    const G4Transform3D& transform   );

    ~G4BooleanSolid() override;

    const G4VSolid* GetConstituentSolid(G4int no) const override;
          G4VSolid* GetConstituentSolid(G4int no) override;
      // If Solid is made up from a Boolean operation of two solids,
      // return the corresponding solid (for no=0 and 1).
      // If the solid is not a "Boolean", return 0.

    G4double GetCubicVolume() override;
    inline G4double GetSurfaceArea() override;

    G4GeometryType  GetEntityType() const override;
    G4Polyhedron* GetPolyhedron () const override;

    std::ostream& StreamInfo(std::ostream& os) const override;

    inline G4int GetCubVolStatistics() const;
    inline G4double GetCubVolEpsilon() const;
    inline void SetCubVolStatistics(G4int st);
    inline void SetCubVolEpsilon(G4double ep);
   
    inline G4int GetAreaStatistics() const;
    inline G4double GetAreaAccuracy() const;
    inline void SetAreaStatistics(G4int st);
    inline void SetAreaAccuracy(G4double ep);
   
    G4ThreeVector GetPointOnSurface() const override;

    G4BooleanSolid(__void__&);
      // Fake default constructor for usage restricted to direct object
      // persistency for clients requiring preallocation of memory for
      // persistifiable objects.

    G4BooleanSolid(const G4BooleanSolid& rhs);
    G4BooleanSolid& operator=(const G4BooleanSolid& rhs);
      // Copy constructor and assignment operator.

    static void SetExternalBooleanProcessor(G4VBooleanProcessor* extProcessor);
      // Set Boolean processor to replace default processor.
    static G4VBooleanProcessor* GetExternalBooleanProcessor();
      // Get Boolean processor needed for G4MultiUnion.

  protected:
  
    void GetListOfPrimitives(std::vector<std::pair<G4VSolid *,G4Transform3D>>&,
                             const G4Transform3D&) const;
      // Get list of constituent primitives of the solid and their placements.

    G4Polyhedron* StackPolyhedron(HepPolyhedronProcessor&,
                                  const G4VSolid*) const;
      // Stack polyhedra for processing. Return top polyhedron.

  protected:
  
    G4VSolid* fPtrSolidA = nullptr;
    G4VSolid* fPtrSolidB = nullptr;

    G4double fCubicVolume = -1.0;
      // Cached value of fCubicVolume 
    G4double fSurfaceArea = -1.0;
      // Cached value of Surface Area

    static G4VBooleanProcessor* fExternalBoolProcessor;
      // External Boolean processor

  private:

    G4int    fCubVolStatistics = 1000000;
    G4int    fAreaStatistics = 1000000;
    G4double fCubVolEpsilon = 0.001;
    G4double fAreaAccuracy = -1;

    mutable G4bool fRebuildPolyhedron = false;
    mutable G4Polyhedron* fpPolyhedron = nullptr;

    mutable std::vector<std::pair<G4VSolid *,G4Transform3D>> fPrimitives;
    mutable G4double fPrimitivesSurfaceArea = 0.0;

    G4bool  createdDisplacedSolid = false;
      // If & only if this object created it, it must delete it
};

#include "G4BooleanSolid.icc"

#endif