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

#include "DetectorConstruction.hh"

#include "G4RunManager.hh"
#include "G4NistManager.hh"
#include "G4Box.hh"
#include "G4Orb.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4SystemOfUnits.hh"

namespace B1
{

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

G4VPhysicalVolume* DetectorConstruction::Construct()
{
  G4bool checkOverlaps = true;
  
  // Get nist material manager
  G4NistManager* nist = G4NistManager::Instance();
  G4Material* air = nist->FindOrBuildMaterial("G4_AIR");
  G4Material* material = nist->FindOrBuildMaterial("G4_WATER");

  // World
  auto solidWorld = new G4Box("World", 20*m, 20*m, 20*m);
  auto logicWorld = new G4LogicalVolume(solidWorld, air, "World");
  auto physWorld = new G4PVPlacement(nullptr, G4ThreeVector(), logicWorld, "World", nullptr,
				     false, 0, checkOverlaps);

  // Sphere
  G4double r;
  auto solidSphere = new G4Orb("Sphere", r = 10.0*m);
  auto logicSphere = new G4LogicalVolume(solidSphere, material, "Sphere");
  new G4PVPlacement(nullptr, G4ThreeVector(), logicSphere, "Sphere", logicWorld,
		    false, 0, checkOverlaps);

  // Box
  G4double x, y, z;
  auto solidBox = new G4Box("Sphere", x = 0.5*m, y = 1.0*m, z = 1.5*m);
  auto logicBox = new G4LogicalVolume(solidBox, material, "Box");

  // Place boxes
  G4int nTheta = 6, nPhi = 8;
  G4double dTheta = 180.*deg/nTheta;
  G4double dPhi = 360.*deg/nPhi;

  G4Translate3D shiftZ(0, 0, r + z);
  for (G4int i = 1; i < nTheta; ++i)
  {
    G4RotateY3D rotTheta(i*dTheta);
    for (G4int k = 0; k < nPhi; ++k)
    {
      G4int copyNumber = 100*i + k + 1; 
      G4RotateZ3D rotPhi(k*dPhi);
      auto transform = rotPhi*rotTheta*shiftZ; 
      new G4PVPlacement(transform, logicBox, "Box", logicWorld,
			false, copyNumber, checkOverlaps);
    }
  }

  //always return the physical World
  fScoringVolume = logicWorld;
  return physWorld;
}

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

}