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//
// INCL++ intra-nuclear cascade model
// Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
// Davide Mancusi, CEA
// Alain Boudard, CEA
// Sylvie Leray, CEA
// Joseph Cugnon, University of Liege
//
#define INCLXX_IN_GEANT4_MODE 1

#include "globals.hh"

/** \file G4INCLParticleSampler.hh
 * \brief Class for sampling particles in a nucleus
 *
 * \date 18 July 2012
 * \author Davide Mancusi
 */

#ifndef G4INCLPARTICLESAMPLER_HH_
#define G4INCLPARTICLESAMPLER_HH_

#include "G4INCLNuclearDensity.hh"
#include "G4INCLINuclearPotential.hh"

namespace G4INCL {

  class ParticleSampler {

    public:
      /** \brief Constructor.
       *
       * \param A the mass number
       * \param Z the charge number
       * \param rCDFTable the interpolation table for the inverse CDF in r-space
       * \param pCDFTable the interpolation table for the inverse CDF in p-space
       */
      ParticleSampler(const G4int A, const G4int Z, InverseInterpolationTable const * const rCDFTable, InverseInterpolationTable const * const pCDFTable);

      /// \brief Destructor
      ~ParticleSampler();

      /// \brief Getter for theDensity
      NuclearDensity const *getDensity() const { return theDensity; }

      /// \brief Getter for thePotential
      NuclearPotential::INuclearPotential const *getPotential() const { return thePotential; }

      /// \brief Setter for theDensity
      void setDensity(NuclearDensity const * const d);

      /// \brief Setter for thePotential
      void setPotential(NuclearPotential::INuclearPotential const * const p);

      ParticleList sampleParticles(ThreeVector const &position) const;

    private:

      void updateSampleOneParticleMethod();

      typedef Particle *(ParticleSampler::*ParticleSamplerMethod)(const ParticleType t) const;
      /** \brief Sample a list of particles.
       *
       * This method is a pointer to the method that does the real work.
       */
      ParticleSamplerMethod sampleOneParticle;

      /// \brief Sample one particle taking into account the rp-correlation
      Particle *sampleOneParticleWithRPCorrelation(const ParticleType t) const;

      /// \brief Sample one particle not taking into account the rp-correlation
      Particle *sampleOneParticleWithoutRPCorrelation(const ParticleType t) const;

      /// \brief Mass number
      const G4int theA;

      /// \brief Charge number
      const G4int theZ;

      /// \brief Pointer to the r-space CDF table
      InverseInterpolationTable const *theRCDFTable;

      /// \brief Pointer to the p-space CDF table
      InverseInterpolationTable const *thePCDFTable;

      /// \brief Pointer to the Cluster's NuclearDensity
      NuclearDensity const *theDensity;

      /// \brief Pointer to the Cluster's NuclearPotential
      NuclearPotential::INuclearPotential const *thePotential;
  };

}

#endif // G4INCLPARTICLESAMPLER_HH_