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//
// G4ParticleHPThermalScatteringData
//
// Class Description:
//
// Cross Sections for a high precision (based on evaluated data
// libraries) description of themal neutron scattering below 4 eV;
// Based on Thermal neutron scattering files
// from the evaluated nuclear data files ENDF/B-VI, Release2
// To be used in your physics list in case you need this physics.
// In this case you want to register an object of this class with
// the corresponding process.
//
// Author: T. Koi (SLAC/SCCS), November-2006 - First implementation.
//         P. Arce (CIEMAT), June-2014 - Conversion neutron_hp to particle_hp
// ---------------------------------------------------------------------
#ifndef G4ParticleHPThermalScatteringData_h
#define G4ParticleHPThermalScatteringData_h 1

#include "G4DynamicParticle.hh"
#include "G4Element.hh"
#include "G4Material.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleHPThermalScatteringNames.hh"
#include "G4ParticleHPVector.hh"
#include "G4VCrossSectionDataSet.hh"

#include <map>
#include <vector>

class G4ParticleHPThermalScatteringData : public G4VCrossSectionDataSet
{
  public:

    G4ParticleHPThermalScatteringData();

    ~G4ParticleHPThermalScatteringData() override;

    G4bool IsIsoApplicable(const G4DynamicParticle*, G4int /*Z*/, G4int /*A*/,
                           const G4Element* /*elm*/, const G4Material* /*mat*/) override;

    G4double GetIsoCrossSection(const G4DynamicParticle*, G4int /*Z*/, G4int /*A*/,
                                const G4Isotope* /*iso*/, const G4Element* /*elm*/,
                                const G4Material* /*mat*/) override;

    G4bool IsApplicable(const G4DynamicParticle*, const G4Element*);

    G4double GetCrossSection(const G4DynamicParticle*, const G4Element*, const G4Material*);
    G4double GetInelasticCrossSection(const G4DynamicParticle*, const G4Element*,
                                      const G4Material*);
    G4double GetCoherentCrossSection(const G4DynamicParticle*, const G4Element*, const G4Material*);
    G4double GetIncoherentCrossSection(const G4DynamicParticle*, const G4Element*,
                                       const G4Material*);

    void BuildPhysicsTable(const G4ParticleDefinition&) override;

    void DumpPhysicsTable(const G4ParticleDefinition&) override;

    // For user prepared thermal files
    // Name of G4Element , Name of NDL file
    void AddUserThermalScatteringFile(const G4String&, const G4String&);

    void CrossSectionDescription(std::ostream&) const override;

  private:

    G4double GetX(const G4DynamicParticle*, G4double aT, std::map<G4double, G4ParticleHPVector*>*);

    void clearCurrentXSData(std::map<G4int, std::map<G4double, G4ParticleHPVector*>*>*);

    std::map<G4double, G4ParticleHPVector*>* readData(const G4String&);

    G4int getTS_ID(const G4Material*, const G4Element*);

    G4bool isInitializer{false};
    G4int verbose{1};
    G4double emax;

    //              element            temp       x section from E
    std::map<G4int, std::map<G4double, G4ParticleHPVector*>*>* coherent{nullptr};
    std::map<G4int, std::map<G4double, G4ParticleHPVector*>*>* incoherent{nullptr};
    std::map<G4int, std::map<G4double, G4ParticleHPVector*>*>* inelastic{nullptr};

    G4double ke_cache;
    G4double xs_cache;
    const G4Element* element_cache;
    const G4Material* material_cache;

    static G4ParticleHPThermalScatteringNames* names;
    static std::vector<G4int>* indexOfThermalElement;
    static std::map<std::pair<const G4Material*, const G4Element*>, G4int>* dic;
};

#endif