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#ifndef DetectorConstruction_h
#define DetectorConstruction_h 1

// -------------------------------------------------------------
//      GEANT4  test  IBREM
//
// Authors: V.Grichine, V.Ivanchenko
//
// Modified:
//
// 18-02-03 V.Ivanchenko create
//
// -------------------------------------------------------------

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#include "G4VUserDetectorConstruction.hh"
#include "G4VPhysicalVolume.hh"
#include "G4Material.hh"

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class CheckVolumeSD;
class PhantomSD;
class TargetSD;
class DetectorMessenger;
class G4LogicalVolume;

class DetectorConstruction : public G4VUserDetectorConstruction
{
public:

  DetectorConstruction();
  ~DetectorConstruction();

public:

  G4VPhysicalVolume* Construct();
  G4double GetGeneratorPosZ() const {return fGeneratorPosZ;};

  void setGap(G4double val) {fDelta = val;};
  void setTarget1Z(G4double val) {fTarget1Z = val;};
  void setTarget2Z(G4double val) {fTarget2Z = val;};
  void setMylarZ(G4double val) {fMylarVolumeZ = val;};
  void setCheckShiftZ(G4double val) {fCheckShiftZ = val;};
  void setAbsorberZ(G4double val) {fAbsorberZ = val;};
  void setAbsorberShiftZ(G4double val) {fAbsorberShiftZ = val;};

  void setTarget1Material(const G4String& m);
  void setTarget2Material(const G4String& m);
  void UpdateGeometry();

private:  // methods

  void Initialise();
  void DefineMaterials();
  void InitialiseGeometryParameters();
  G4VPhysicalVolume* ConstructVolumes();

private:  // fields

  CheckVolumeSD* checkSD;
  PhantomSD* calorimeterSD;
  TargetSD* targetSD;
  G4double fWorldXY, fWorldZ;
  G4double fDelta;
  G4double fGeneratorPosZ;

  G4double fTargetRadius, fTarget1Z, fTarget1PosZ;
  G4double fTarget2Z, fTarget2PosZ;

  G4double fGasVolumeRadius,fGasVolumeZ, fGasVolumePosZ, fAirZ, fMylarVolumeZ, fMylarPosZ;
  G4double fCheckVolumeRadius, fCheckVolumeZ, fCheckShiftZ, fCheckVolumePosZ;
  G4double fTargetVolumeZ, fTargetVolumePosZ;

  G4double fPhantomRadius, fPhantomZ, fPhantomPosZ;
  G4double fAbsorberRadius, fAbsorberZ, fAbsorberShiftZ, fAbsorberPosZ;
  G4double fDistanceVacuumTarget, fWindowZ, fWindowPosZ;

  G4Material* fWorldMaterial;

  G4Material* fTarget1Material;
  G4Material* fTarget2Material;
  G4Material* fMylar;
  G4Material* fWindowMaterial;

  G4Material* fLightMaterial;
  G4Material* fAbsorberMaterial;

  G4LogicalVolume* logicTarget1;
  G4LogicalVolume* logicTarget2;

  DetectorMessenger*  dMessenger;
};

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#endif