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/// \file PrimaryGeneratorAction.hh
/// \brief Definition of the PrimaryGeneratorAction class

#ifndef PrimaryGeneratorAction_h
#define PrimaryGeneratorAction_h 1

//---------------------------------------------------------------------------
//
// ClassName:   PrimaryGeneratorAction
//
// Description: Generate primary beam
//
// Authors: V.Grichine, V.Ivanchenko
//
// Modified:
//
//----------------------------------------------------------------------------
//

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#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4ThreeVector.hh"
#include "G4VUserPrimaryGeneratorAction.hh"
#include "globals.hh"

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class PrimaryGeneratorMessenger;
class DetectorConstruction;

class PrimaryGeneratorAction : public G4VUserPrimaryGeneratorAction
{
  public:
    // The constructor defines a ParticleGun object, which allows
    // shooting a beam of particles through the experimental set-up.
    PrimaryGeneratorAction(DetectorConstruction* pDet);

    // The destructor. It deletes the ParticleGun.
    virtual ~PrimaryGeneratorAction();

    // It reads the parameters of the primary particles.
    // Generates the primary event via the ParticleGun method.
    void GeneratePrimaries(G4Event* anEvent);

    // Get/Set methods
    void SetBeamEnergy(G4double val);

    inline void SetBeamSigmaE(G4double val) { fSigmaE = val; };
    inline void SetBeamX(G4double val) { fX0 = val; };
    inline void SetBeamY(G4double val) { fY0 = val; };
    inline void SetBeamZ(G4double val) { fZ0 = val; };
    inline void SetBeamSigmaX(G4double val) { fSigmaX = val; };
    inline void SetBeamSigmaY(G4double val) { fSigmaY = val; };
    inline void SetBeamSigmaZ(G4double val) { fSigmaY = val; };
    inline void SetBeamMinCosTheta(G4double val) { fMinCosTheta = val; };
    inline void SetSigmaTheta(G4double val) { fSigmaTheta = val; };
    inline void SetVerbose(G4int val) { fVerbose = val; };
    inline void SetRandom(const G4String& type) { fGauss = type; };

    G4bool GetVerbose() const { return fVerbose; }

  private:
    void InitializeMe();

    PrimaryGeneratorAction& operator=(const PrimaryGeneratorAction& right);
    PrimaryGeneratorAction(const PrimaryGeneratorAction&);

    G4int fVerbose;
    PrimaryGeneratorMessenger* fMessenger;
    G4ParticleGun* fParticleGun;
    DetectorConstruction* fDetector;

    G4int fCounter;
    G4double fX0, fY0, fZ0;
    G4double fSigmaX, fSigmaY, fSigmaZ;
    G4double fRMax2;
    G4double fSigmaE;
    G4double fSigmaTheta;
    G4double fEnergy;
    G4double fMinCosTheta;
    G4ThreeVector fPosition;
    G4ThreeVector fDirection;
    G4String fGauss;
};

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#endif
