////////////////////////////////////////////////////////////////////////
/// \class RAT::Classifiers::QPDT
///
/// \brief Gives the QPDT and amount of hits in an early time window.
///
/// \author name Eric Marzec <marzece@sas.upenn.edu>
///
/// REVISION HISTORY:\n
///     07/05/2013 : Eric Marzec - New file \n
///     05/22/2017 : J Caravaca - Add ability to use selectors /n
///     10/16/2017 : T Kaptanoglu - Add QMax to selector
///
/// \details Compares observed PMT charges for hits that are in an early
///	    time window to a DiPolya+Exponential distribution to obtain
///         the hit's charge probability. This is then used to calculate
///	    the event's QPDT which is returned along with the number of
///	    hits within the early time window.
///
////////////////////////////////////////////////////////////////////////

#ifndef __RAT_Classifiers_QPDT_
#define __RAT_Classifiers_QPDT_

#include <RAT/SeededClassifier.hh>
#include <RAT/SelectorClassifier.hh>
#include <RAT/DU/LightPathCalculator.hh>
namespace RAT
{
  namespace DS
  {
    class FitResult;
  }

  namespace Classifiers
  {

    class QPDT : public SeededClassifier, public SelectorClassifier
    {
    public:
      virtual std::string GetName() const { return QPDT::Name(); }

      static std::string Name() { return std::string( "QPDT" ); }

      void Initialise( const std::string& ) { }

      void BeginOfRun( DS::Run& run );

      void EndOfRun( DS::Run& ) { }

      virtual DS::ClassifierResult GetClassification();
      /// Set the seed to default
      void DefaultSeed();
      /// Set the seed from seed
      void SetSeed( const DS::FitResult& seed );


    private:
      TVector3 fEventPos; ///< Reconstructed event position
      double fEventTime; ///< Reconstructed event time
      double fUpperTimeLimit; ///< Upper time for early time window
      double fLowerTimeLimit; ///< Lower time for early time window
      double fQCutoffMax; ///< Maximum charge to consider for lowest prob calculation
      double fQCutoffMin; ///< Minimum charge to consider for lowest prob calculation
      DU::LightPathCalculator fLightPath; ///< Light path calculator for a given run
      DS::FitVertex fSeedVertex;
    };

  } //::Classifier

} //::RAT

#endif