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//
// P. Arce, June-2014 Conversion neutron_hp to particle_hp
//
#ifndef G4ParticleHPFissionBaseFS_h
#define G4ParticleHPFissionBaseFS_h 1

#include "G4Cache.hh"
#include "G4DynamicParticleVector.hh"
#include "G4ParticleHPAngular.hh"
#include "G4ParticleHPEnergyDistribution.hh"
#include "G4ParticleHPFinalState.hh"
#include "G4ParticleHPNames.hh"
#include "G4ParticleHPVector.hh"
#include "G4ReactionProduct.hh"
#include "globals.hh"

class G4ParticleHPFissionBaseFS : public G4ParticleHPFinalState
{
    struct toBeCached
    {
        const G4ReactionProduct* theNeutronRP{nullptr};
        const G4ReactionProduct* theTarget{nullptr};
        toBeCached() = default;
    };

  public:
    G4ParticleHPFissionBaseFS()
    {
      hasXsec = true;
      theXsection = new G4ParticleHPVector;
    }

    ~G4ParticleHPFissionBaseFS() override { delete theXsection; }

    void Init(G4double A, G4double Z, G4int M, G4String& dirName, G4String& bit,
              G4ParticleDefinition*) override;

    G4DynamicParticleVector* ApplyYourself(G4int Prompt);

    G4double GetXsec(G4double anEnergy) override
    {
      return std::max(0., theXsection->GetY(anEnergy));
    }

    G4ParticleHPVector* GetXsec() override { return theXsection; }

    inline void SetNeutronRP(const G4ReactionProduct& aNeutron)
    {
      fCache.Get().theNeutronRP = &aNeutron;
      theAngularDistribution.SetProjectileRP(aNeutron);
    }

    inline void SetTarget(const G4ReactionProduct& aTarget)
    {
      fCache.Get().theTarget = &aTarget;
      theAngularDistribution.SetTarget(aTarget);
    }

  private:
    G4HadFinalState* ApplyYourself(const G4HadProjectile&) override { return nullptr; }

    G4ParticleHPVector* theXsection;
    G4ParticleHPEnergyDistribution theEnergyDistribution;
    G4ParticleHPAngular theAngularDistribution;

    G4Cache<toBeCached> fCache;
};

#endif
