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/// \file B1/src/DetectorConstruction.cc
/// \brief Implementation of the B1::DetectorConstruction class

#include "DetectorConstruction.hh"

#include "G4Box.hh"
#include "G4Tubs.hh"
#include "G4Polycone.hh"
#include "G4Torus.hh"
#include "G4Ellipsoid.hh"
#include "G4UnionSolid.hh"
#include "G4Transform3D.hh"
#include "G4LogicalVolume.hh"
#include "G4NistManager.hh"
#include "G4PVPlacement.hh"
#include "G4SystemOfUnits.hh"

namespace B1
{

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4VPhysicalVolume* DetectorConstruction::Construct()
{
  G4bool checkOverlaps = true;

  // Set materials
  G4NistManager* nist = G4NistManager::Instance();
  G4Material* Vaccum = nist->FindOrBuildMaterial("G4_Galactic");
  G4Material* Germanium = nist->FindOrBuildMaterial("G4_Ge");

  // Geometry parameters
  G4double rho = 8*mm;
  G4double rext = 30*mm;
  G4double rint = 6*mm;
  G4double hext = 74*mm;
  G4double hint = 50*mm;
  
  // Construct world
  auto world_box  = new G4Box("world_box", 50*mm, 50*mm, 50*mm);  
  auto world_log  = new G4LogicalVolume(world_box, Vaccum, "world_log");
  auto world_phys = new G4PVPlacement(G4Transform3D(), world_log, "world_phys", nullptr, false, 0, checkOverlaps);

  // Construct detector
  G4double zplane[3] = { -hext/2., hext/2. - rho, hext/2. };
  G4double rinner[3] = { 0., 0., 0. };
  G4double router[3] = { rext, rext, rext - rho };

  auto det_polycone = new G4Polycone("det_polycone", 0., CLHEP::twopi, 3, zplane, rinner, router);
  auto det_torus    = new G4Torus("det_torus", 0., rho, rext - rho, 0., CLHEP::twopi);
  auto det_union    = new G4UnionSolid("det_union", det_polycone, det_torus, G4TranslateZ3D(hext/2. - rho));
  auto det_log      = new G4LogicalVolume(det_union, Germanium, "det_log");
  new G4PVPlacement(G4Transform3D(), det_log, "det_phys", world_log, false, 0, checkOverlaps);

  // Construct hole
  G4double hcyl = hint - rint;
  auto hole_cylinder = new G4Tubs("hole_cylinder", 0., rint, hcyl/2., 0., CLHEP::twopi); 
  auto hole_cylinder_log = new G4LogicalVolume(hole_cylinder, Vaccum, "hole_cylinder_log");
  new G4PVPlacement(G4TranslateZ3D(-hext/2. + hcyl/2.), hole_cylinder_log, "hole_cylinder_phys", det_log, false, 0, checkOverlaps);

  auto hole_hemisphere = new G4Ellipsoid("hole_hemisphere", rint, rint, rint, 0., rint);
  auto hole_hemisphere_log = new G4LogicalVolume(hole_hemisphere, Vaccum, "hole_hemisphere_log");
  new G4PVPlacement(G4TranslateZ3D(-hext/2. + hcyl), hole_hemisphere_log, "hole_hemisphere_phys", det_log, false, 0, checkOverlaps);
  
  fScoringVolume = world_log;
  return world_phys;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

}  // namespace B1