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//
// P. Arce, June-2014 Conversion neutron_hp to particle_hp
//
#ifndef G4ParticleHPLabAngularEnergy_h
#define G4ParticleHPLabAngularEnergy_h 1

#include "G4InterpolationManager.hh"
#include "G4Neutron.hh"
#include "G4ParticleHPInterpolator.hh"
#include "G4ParticleHPVector.hh"
#include "G4ReactionProduct.hh"
#include "G4VParticleHPEnergyAngular.hh"
#include "G4ios.hh"
#include "globals.hh"

#include <fstream>

class G4ParticleHPLabAngularEnergy : public G4VParticleHPEnergyAngular
{
  public:
    G4ParticleHPLabAngularEnergy()
    {
      theEnergies = nullptr;
      theData = nullptr;
      nCosTh = nullptr;
      theSecondManager = nullptr;
      nEnergies = -1;
      currentMeanEnergy = -1.0;
    }
    ~G4ParticleHPLabAngularEnergy() override
    {
      delete[] theEnergies;
      delete[] nCosTh;
      if (theData != nullptr) {
        for (G4int i = 0; i < nEnergies; i++)
          delete[] theData[i];
        delete[] theData;
      }
      delete[] theSecondManager;
    }

  public:
    void Init(std::istream& aDataFile) override;
    G4ReactionProduct* Sample(G4double anEnergy, G4double massCode, G4double mass) override;
    G4double MeanEnergyOfThisInteraction() override { return currentMeanEnergy; }

  private:
    // number of incoming neutron energies
    G4int nEnergies;
    // Interpol between neutron energies
    G4InterpolationManager theManager;
    // Incoming neutron energies
    G4double* theEnergies;
    // number of directioncosines; parallel to theEnergies
    G4int* nCosTh;
    // knows the interpolation between these stores
    G4InterpolationManager* theSecondManager;
    // vectors of secondary energy, haufigkeit; parallel to theEnergies
    G4ParticleHPVector** theData;

    // utility interpolator
    G4ParticleHPInterpolator theInt;

    // cashed value of mean secondary energy in this event.
    G4double currentMeanEnergy;
};
#endif