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#ifndef hTestPrimaryGeneratorAction_h
#define hTestPrimaryGeneratorAction_h 1

//---------------------------------------------------------------------------
//
// ClassName:   hTestPrimaryGeneratorAction
//  
// Description: Generate primary beam 
//
// Authors:    0.6.04.01 V.Ivanchenko
//
// Modified:
//
//----------------------------------------------------------------------------
//

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

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class hTestPrimaryGeneratorMessenger;

class hTestPrimaryGeneratorAction : public G4VUserPrimaryGeneratorAction
{
  public:

  // The constructor defines a ParticleGun object, which allows 
  // shooting a beam of particles through the experimental set-up.
    hTestPrimaryGeneratorAction(hTestDetectorConstruction*);

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

  public:

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

  //Get/Set methods
    void SetBeamX(G4double val) {x0 = val;};
    void SetBeamY(G4double val) {y0 = val;};
    void SetBeamZ(G4double val) {z0 = val;};
    void SetBeamSigmaX(G4double val) {sigmaX = val;};
    void SetBeamSigmaY(G4double val) {sigmaY = val;};
    void SetBeamSigmaZ(G4double val) {sigmaY = val;};
    void SetBeamSigmaE(G4double val); 
    void SetBeamEnergy(G4double val); 
    void SetBeamMinCosTheta(G4double val) {minCosTheta = val;};
    void SetVerbose(G4int val) {verbose = val;};
    G4ThreeVector GetBeamPosition() const {return position;}; 
    G4ThreeVector GetBeamDirection() const {return direction;};
    G4ThreeVector GetBeamEnergy() const {return energy;};
    G4int GetVerbose() const {return verbose;};
    void SetBeamBeta(G4double val);
    void SetSigmaBeta(G4double val);
    void SetRandom(const G4String& type) {m_gauss = type;};

  private:

    void InitializeMe();

    hTestDetectorConstruction* theDet;
    G4ParticleGun* particleGun;
    hTestPrimaryGeneratorMessenger* theMessenger;

    G4int counter;
    G4int verbose;
    G4double x0, y0, z0;
    G4double sigmaX, sigmaY, sigmaZ;
    G4double sigmaE;
    G4double energy;
    G4double minE, maxE, minBeta, maxBeta;
    G4double minCosTheta;
    G4ThreeVector position;
    G4ThreeVector direction;
    G4String m_gauss;
};

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#endif