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//
// 080718 Add ClearHistories() method by T. Koi
//
// P. Arce, June-2014 Conversion neutron_hp to particle_hp
//
#ifndef G4VParticleHPEnergyAngular_h
#define G4VParticleHPEnergyAngular_h 1

#include "G4Cache.hh"
#include "G4ReactionProduct.hh"
#include "G4ios.hh"
#include "globals.hh"

#include <fstream>

class G4VParticleHPEnergyAngular
{
    struct toBeCached
    {
        G4ReactionProduct* theProjectileRP{nullptr};
        G4ReactionProduct* theTarget{nullptr};
        G4ReactionProduct* theCMS{nullptr};
        toBeCached() = default;
    };

  public:
    G4VParticleHPEnergyAngular()
    {
      theQValue = 0;
      toBeCached val;
      fCache.Put(val);
    }

    virtual ~G4VParticleHPEnergyAngular() = default;

    virtual void Init(std::istream& aDataFile) = 0;
    virtual G4ReactionProduct* Sample(G4double anEnergy, G4double massCode, G4double mass) = 0;
    virtual G4double MeanEnergyOfThisInteraction() = 0;

    void SetProjectileRP(G4ReactionProduct* aIncidentParticleRP)
    {
      fCache.Get().theProjectileRP = aIncidentParticleRP;
    }

    void SetTarget(G4ReactionProduct* aTarget) { fCache.Get().theTarget = aTarget; }

    G4ReactionProduct* GetTarget() const { return fCache.Get().theTarget; }

    G4ReactionProduct* GetProjectileRP() const { return fCache.Get().theProjectileRP; }

    G4ReactionProduct* GetCMS()
    {
      *fCache.Get().theCMS = *fCache.Get().theProjectileRP + *fCache.Get().theTarget;
      return fCache.Get().theCMS;
    }

    void SetQValue(G4double aValue) { theQValue = aValue; }

    virtual void ClearHistories() {}

    G4VParticleHPEnergyAngular(G4VParticleHPEnergyAngular&) = delete;
    G4VParticleHPEnergyAngular& operator=
    (const G4VParticleHPEnergyAngular& right) = delete;

  protected:
    G4double GetQValue() const { return theQValue; }

  private:
    G4double theQValue;

    G4Cache<toBeCached> fCache;
};
#endif