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// G4UPolyhedra
//
// Class description:
//
// Wrapper class for G4Polyhedra to make use of VecGeom Polyhedron.

// Author: Gabriele Cosmo (CERN), 31.10.2013
// --------------------------------------------------------------------
#ifndef G4UPOLYHEDRA_HH
#define G4UPOLYHEDRA_HH

#include "G4UAdapter.hh"

#if ( defined(G4GEOM_USE_USOLIDS) || defined(G4GEOM_USE_PARTIAL_USOLIDS) )

#include <VecGeom/volumes/UnplacedPolyhedron.h>

#include "G4TwoVector.hh"
#include "G4PolyhedraSide.hh"
#include "G4PolyhedraHistorical.hh"
#include "G4Polyhedron.hh"

class G4EnclosingCylinder;
class G4ReduciblePolygon;

/**
 * @brief G4UPolyhedra is a wrapper class for G4Polyhedra to make use
 * of VecGeom Polyhedron.
 */

class G4UPolyhedra : public G4UAdapter<vecgeom::UnplacedPolyhedron>
{
  using Shape_t = vecgeom::UnplacedPolyhedron;
  using Base_t  = G4UAdapter<vecgeom::UnplacedPolyhedron>;

  public:

    /**
     * Constructs a polyhedra, given its parameters.
     *  @param[in] name The solid name.
     *  @param[in] phiStart Initial Phi starting angle.
     *  @param[in] phiTotal Total Phi angle.
     *  @param[in] numSide Number of sides.
     *  @param[in] numZPlanes Number of Z planes.
     *  @param[in] zPlane Position of Z planes.
     *  @param[in] rInner Tangent distance to inner surface.
     *  @param[in] rOuter Tangent distance to outer surface.
     */
    G4UPolyhedra( const G4String& name, 
                     G4double phiStart,    // initial phi starting angle
                     G4double phiTotal,    // total phi angle
                     G4int numSide,        // number sides
                     G4int numZPlanes,     // number of z planes
               const G4double zPlane[],    // position of z planes
               const G4double rInner[],    // tangent distance to inner surface
               const G4double rOuter[]  ); // tangent distance to outer surface

    /**
     * Alternative constructor of a polyhedra, given corners coordinates.
     *  @param[in] name The solid name.
     *  @param[in] phiStart Initial Phi starting angle.
     *  @param[in] phiTotal Total Phi angle.
     *  @param[in] numSide Number of sides.
     *  @param[in] numRZ Number of corners in r,Z space.
     *  @param[in] r r coordinates of corners.
     *  @param[in] z Z coordinates of corners.
     */
    G4UPolyhedra( const G4String& name, 
                     G4double phiStart,    // initial phi starting angle
                     G4double phiTotal,    // total phi angle
                     G4int    numSide,     // number sides
                     G4int    numRZ,       // number corners in r,z space
               const G4double r[],         // r coordinate of these corners
               const G4double z[]       ); // z coordinate of these corners

    /**
     * Default destructor.
     */
    ~G4UPolyhedra() override = default;

    /**
     * Dispatch method for parameterisation replication mechanism and
     * dimension computation.
     */
    void ComputeDimensions(G4VPVParameterisation* p,
                           const G4int n,
                           const G4VPhysicalVolume* pRep) override;

    /**
     * Makes a clone of the object for use in multi-treading.
     *  @returns A pointer to the new cloned allocated solid.
     */
    G4VSolid* Clone() const override;

    /**
     * Accessors.
     */
    G4int GetNumSide()        const;
    G4double GetStartPhi()    const;
    G4double GetEndPhi()      const;
    G4double GetSinStartPhi() const;
    G4double GetCosStartPhi() const;
    G4double GetSinEndPhi()   const;
    G4double GetCosEndPhi()   const;
    G4bool IsOpen()           const;
    G4bool IsGeneric()        const;
    G4int GetNumRZCorner()    const;
    G4PolyhedraSideRZ GetCorner( const G4int index ) const;
    G4PolyhedraHistorical* GetOriginalParameters() const;

    /**
     * Modifier.
     */
    void SetOriginalParameters(G4PolyhedraHistorical* pars);

    /**
     * Clears all parameters and rebuild the shape, for use in divisions.
     */
    G4bool Reset();

    /**
     * Returns the type ID, "G4Polyhedra" of the solid.
     */
    inline G4GeometryType GetEntityType() const override;

    /**
     * Returns true as the solid has only planar faces.
     */
    inline G4bool IsFaceted() const override;

    /**
     * Computes the bounding limits of the solid.
     *  @param[out] pMin The minimum bounding limit point.
     *  @param[out] pMax The maximum bounding limit point.
     */
    void BoundingLimits(G4ThreeVector& pMin, G4ThreeVector& pMax) const override;

    /**
     * Calculates the minimum and maximum extent of the solid, when under the
     * specified transform, and within the specified limits.
     *  @param[in] pAxis The axis along which compute the extent.
     *  @param[in] pVoxelLimit The limiting space dictated by voxels.
     *  @param[in] pTransform The internal transformation applied to the solid.
     *  @param[out] pMin The minimum extent value.
     *  @param[out] pMax The maximum extent value.
     *  @returns True if the solid is intersected by the extent region.
     */
    G4bool CalculateExtent(const EAxis pAxis,
                           const G4VoxelLimits& pVoxelLimit,
                           const G4AffineTransform& pTransform,
                           G4double& pMin, G4double& pMax) const override;

    /**
     * Returns a generated polyhedron as graphical representations.
     */
    G4Polyhedron* CreatePolyhedron() const override;

    /**
     * Copy constructor and assignment operator.
     */
    G4UPolyhedra( const G4UPolyhedra& source );
    G4UPolyhedra& operator=( const G4UPolyhedra& source );

  private:

    /**
     * Sets internal parameters for the generic constructor.
     */
    void SetOriginalParameters();

  private:

    G4bool fGenericPgon; // true if created through the 2nd generic constructor
    G4PolyhedraHistorical fOriginalParameters; // original input parameters

    G4double wrStart;
    G4double wrDelta;
    G4int    wrNumSide;
    std::vector<G4TwoVector> rzcorners;
};

// --------------------------------------------------------------------
// Inline methods
// --------------------------------------------------------------------

inline G4GeometryType G4UPolyhedra::GetEntityType() const
{
  return "G4Polyhedra";
}

inline G4bool G4UPolyhedra::IsFaceted() const
{
  return true;
}

#endif  // G4GEOM_USE_USOLIDS

#endif