////////////////////////////////////////////////////////////////////////
/// \class RAT::EnvelopeConstructor
///
/// \brief   Class that constructs the Envelope Logical Volume
///
/// \author  Phil Jones <p.jones22@physics.ox.ac.uk>
/// \author Aksel Hallin <aksel.hallin@ualberta.ca> -- contact person
///
/// REVISION HISTORY:\n
///     07/09 : P.Jones - First Revision, new file. \n
///     03/12 : P.Jones - Allowed for cuboid envelopes. \n
///
/// \details  Takes the envelope parameters and constructs a
///          envelope solid and places it into a logical volume
///
///
////////////////////////////////////////////////////////////////////////

#ifndef __RAT_EnvelopeConstructor__
#define __RAT_EnvelopeConstructor__

#include <G4Types.hh>

#include <RAT/ConstructorBase.hh>

#include <string>

class G4LogicalVolume;
class G4Material;
class G4VisAttributes;

namespace RAT
{

class EnvelopeConstructor : public ConstructorBase
{
public:
  /// Constructor for polyhedra (faces>0) or cylindrical (faces==0) envelope version. Needs parameters and a name
  EnvelopeConstructor( const std::string &prefix,///< Prefix to name objects
                       double top, ///< Position of envelope top, above PMT equator
                       double bottom, ///< Position of envelope bottom, -ve if below equator
                       double radius, ///< The face radius, see G4Polyhedra definition
                       int faces, ///< The number of faces, 6 for hex
                       G4VisAttributes* visAttribues, ///< Visualisation attributes
                       G4Material* exterior ///< Pointer to the exterior material
                     );
  // Constructor for cuboid envelope version. Needs parameters and a name
  EnvelopeConstructor( const std::string &prefix,///< Prefix to name objects
                       double top, ///< Position of envelope top, above PMT equator
                       double bottom, ///< Position of envelope bottom, -ve if below equator
                       double xWidth, ///< X width
                       double yWidth, ///< Y width
                       G4VisAttributes* visAttribues, ///< Visualisation attributes
                       G4Material* exterior ///< Pointer to the exterior material
                     );

  virtual ~EnvelopeConstructor() {}


  /// Constructs the logical volume
  void Construct();
  /// Returns the logical volume for the bucket
  G4LogicalVolume* GetLogicalVolume();
  /// Sets the logical volume, if the user has set no envelope option
  void SetLogicalVolume( G4LogicalVolume* envLogic );
  // Returns the top in z co-ord relative to PMT equator
  double GetMaxHeight();
  /// Returns the bottom in z co-ord relative to PMT equator
  double GetMaxDepth();
  /// Returns the radius of the concentrator, for a hex shape this is the distance of the plane that has \n
  /// a normal that passes through the origin (See G4Polyhedra definition).
  double GetHexRadius();
  /// Returns the offset from the pmt equator (in Z) where the concentrator should be placed
  double GetOffset();

protected:
  std::string fPrefix; ///< Prefix to name objects
  double fTop; ///< Top of the Envelope Z coord
  double fBottom; ///< Bottom of the Envelope Z coord
  // Radius or width
  double fRadius; ///< Radius of the Envelope rho coord
  double fXWidth; ///< X dimension width of the cuboid
  double fYWidth; ///< Y dimension width of the cuboid
  double fOffset; ///< Envelope offset along z axis
  int fNumFaces; ///< Number of faces on the envelope
  G4VisAttributes* fVisAttributes; ///< Visualisation attributes


  G4LogicalVolume* fEnvelopeLogic; ///< The completed logical volume
  G4Material* fExterior; ///< The material for the envelope (same as mother volume)

private:
  /// To prevent usage
  EnvelopeConstructor();
};

inline double EnvelopeConstructor::GetMaxHeight()
{
  return fTop;
}

inline double EnvelopeConstructor::GetMaxDepth()
{
  return fBottom;
}

inline double EnvelopeConstructor::GetHexRadius()
{
  return fRadius;
}

inline double EnvelopeConstructor::GetOffset()
{
  return fOffset;
}

} //::RAT

#endif