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/// \file PrimaryGeneratorSource.hh
/// \brief Header file for Primary Generator Source class for Molecular DNA simulation

#ifndef MOLECULAR_PRIMARY_GENERATORSOURCE_HH
#define MOLECULAR_PRIMARY_GENERATORSOURCE_HH

#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"
#include "G4ThreeVector.hh"

#include <fstream>
#include <list>

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// - Abstract PrimaryGeneratorSource
//        - pure virtual functions
// - Implementations:
//        - PrimaryGeneratorSourceGRASCSV
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// Class to handle Primary objects
class Primary
{
  public:
    // Primary class constructor
    Primary() { ; }

    // Primary class destructor
    ~Primary() = default;

    void SetName(const G4String& name) { fName = name; }
    void SetName(G4int PDGnum)
    {
      if (PDGnum != 0) {
        G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
        G4ParticleDefinition* particle = pTable->FindParticle(PDGnum);
        fName = particle->GetParticleName();
      }
      else {
        fName = "";
      }
    }

    G4String GetName() const { return fName; }

    void SetPosition(const G4ThreeVector& position) { fPosition = position; }
    G4ThreeVector GetPosition() const { return fPosition; }

    void SetMomentum(const G4ThreeVector& momentum) { fMomentum = momentum; }
    G4ThreeVector GetMomentum() const { return fMomentum; }

    void SetMomentumDirection(const G4ThreeVector& momentumDir) { fMomentumDir = momentumDir; }
    G4ThreeVector GetMomentumDirection() const { return fMomentumDir; }

    void SetEnergy(const G4double& energy) { fEnergy = energy; }
    G4double GetEnergy() const { return fEnergy; }

    G4ParticleDefinition* GetParticleDefinition()
    {
      G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
      G4ParticleDefinition* particle = pTable->FindParticle(fName.data());
      return particle;
    }

    void Print()
    {
      G4cout << " *** " << fName << " *** " << G4endl;
      G4cout << " * Position: " << fPosition << G4endl;
      G4cout << " * Momentum Direction: " << fMomentumDir << G4endl;
      G4cout << " * Energy: " << fEnergy << G4endl;
      G4cout << " ***  *** ***" << G4endl;
    }

  private:
    G4String fName;
    G4ThreeVector fPosition;
    G4ThreeVector fMomentum;
    G4ThreeVector fMomentumDir;
    G4double fEnergy;
};

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class PrimaryGeneratorSource
{
  public:
    // PrimaryGeneratorSource class destructor
    virtual ~PrimaryGeneratorSource() = default;

    // Define Primary class within PrimaryGeneratorSource
    virtual Primary* GetPrimary() = 0;
    virtual void SetBufferSize(G4int) = 0;
    virtual void SetnParticles(G4int) = 0;
};

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#endif