////////////////////////////////////////////////////////////////////////
/// \class RAT::PDFs::SimpleTiming
///
/// \brief  A simple PDF that uses the scintillator emission time profile
///
/// \author Phil G Jones <p.jones22@physics.ox.ac.uk>
/// \author Matt Mottram < m.mottram@qmul.ac.uk> -- contact person
///
/// REVISION HISTORY:\n
///     26/04/2011 : P G Jones - New file \n
///
/// \details The PDF retrieves the scintillator emission time profile. The
///         proposed vertex to PMT straight line time is calculated and
///         taken away from the hit time. This time residual is then compared
///         against the emission time profile to give the probability.
///
////////////////////////////////////////////////////////////////////////

#ifndef __RAT_PDF_SimpleTiming_
#define __RAT_PDF_SimpleTiming_

#include <RAT/PDF.hh>
#include <RAT/DU/LightPathCalculator.hh>

#include <string>

class G4PhysicsOrderedFreeVector;

namespace RAT
{

class FitterPMT;

namespace DS
{
  class FitVertex;
}

namespace PDFs
{

class SimpleTiming : public PDF
{
public:
  double GetProbability( const FitterPMT& pmt, const DS::FitVertex& vertex );

  std::string GetName() const { return Name(); }
  static std::string Name() { return std::string( "simpleTiming" ); }

  /// Initialise the scintTiming PDF
  void Initialise( const std::string& param );

  void BeginOfRun( DS::Run& run );

  void EndOfRun( DS::Run& ) { }
protected:
  std::string fIndex; ///< Optional database index
  G4PhysicsOrderedFreeVector* fProbaility; ///< Scintillator emission time
  DU::LightPathCalculator fLightPath; ///< Light path calculator for a given run
};

} //::PDFs

} //::RAT

#endif