#ifndef FCALDetectorConstruction_h
#define FCALDetectorConstruction_h 1

#include "globals.hh"
#include "G4VUserDetectorConstruction.hh"

class G4VPhysicalVolume;
class G4LogicalBorderSurface;

class FCALDetectorConstruction : public G4VUserDetectorConstruction {
public:
  FCALDetectorConstruction(G4int row, G4int column, G4int LGs, G4double zLG, G4double hPlexi, G4int Agap);
  ~FCALDetectorConstruction();
  
public:
  G4VPhysicalVolume* Construct();
  
  G4int getRows()	{ return n_Rows; }
  G4int getColumns()	{ return n_Columns; }
  G4double getXLength()	{ return x_FoilThick; }
  G4double getYLength()	{ return y_FoilThick; }
  G4double getzLG()     { return zGlass; }
  G4double getzplexy()  { return h_PlexiGlass; }
  G4int getAirgap()     { return Airgap; }
  
private:	
  G4int n_Rows, n_Columns, n_Cells;
  G4int LGshift; // if 1 shift every other row of lead glass blocks by half the width of a block
  G4double front_Space;
  G4double zGlass;
  G4double zLightGuide;
  G4int Airgap;
	
  G4double x_World, y_World, z_World;  // for the World volume
  G4double x_LeadGlass, y_LeadGlass, z_LeadGlass;	// for the LeadGlass 
  G4double x_AirGap, y_AirGap, z_AirGap; 	// for the air gap of the leadglass
  G4double x_FoilThick, y_FoilThick, z_FoilThick;	// for the aluminum foil thickness
  
  G4double r_Min, r_Max, angle_Min, angle_Max; // for the common radii and angles 
  G4double r_cathode, r_FoilMax, r_AirMax; // for the cathode radius and the aluminum foil radius
  // length of silicon cookie, platic light guide, 
  //           PMT entrance window, PMT photo cathode
  G4double h_Cookie, h_PlexiGlass, h_PMTGlass, h_Cathode;
  G4double h_Total; // total length of light guide assembly
};

# endif /*FCALDetectorConstruction_h*/