////////////////////////////////////////////////////////////////////////
/// \class RAT::TorusPMTConstructor
///
/// \brief   Constructs a torus shape PMT
///
/// \author  Phil Jones <p.g.jones@qmul.ac.uk>
/// \author Aksel Hallin <aksel.hallin@ualberta.ca> -- contact person
/// \author Christopher Jackson <chrisjackson@berkeley.edu> -- contact person
///
/// REVISION HISTORY:\n
///     03/12 : P.Jones - First Revision, new file. \n
///
/// \details  Extends PMTConstructor to produce a torus shaped PMT.
///
////////////////////////////////////////////////////////////////////////

#ifndef __RAT_TorusPMTConstructor__
#define __RAT_TorusPMTConstructor__

#include <RAT/PMTConstructorParams.hh>
#include <RAT/PMTConstructor.hh>

#include <string>
#include <vector>

namespace RAT
{

class TorusPMTConstructor : public PMTConstructor
{
public:
  /// Constructor for the class, needs parameters and a name
  TorusPMTConstructor( const std::string &prefix, ///< Prefix string
                       const PMTConstructorParams &params ///< Parameters that define the pmt
                     );

  virtual ~TorusPMTConstructor() {}

  /// Construct the G4LogicalVolume that is a RAT PMT
  void ConstructLogical();
  /// Returns the Max height above the pmt equator of the bucket
  double GetMaxHeight();
  /// Returns the Max depth below the pmt equator of the bucket (note returns a -ive number)
  double GetMaxDepth();
  /// Returns the Max radius
  double GetHexRadius();
protected:
  /// Calculate the parameters that make the torus shape
  void CalcInnerParams( GLG4TorusStack* body,///< The body solid
                        std::vector<double>& innerZEdge,///< Inner Z edge co-ords
                        std::vector<double>& innerRhoEdge,///< Inner rho edge coords
                        int& pcMirrorTopIndex, ///< Index in array that corresponds to photocathode mirror overlap top
                        int& pcMirrorBottomIndex, ///< Index in array that corresponds to photocathode mirror overlap bottom
                        double& zLowestDynode );///< The Lowest dynode position
  double fMaxRadius; ///< Derived maximum radius of the PMT
private:
  ///To prevent usage
  TorusPMTConstructor();
};

} //::RAT

#endif