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/// \file GB02DetectorConstruction.cc
/// \brief Implementation of the GB02DetectorConstruction class

#include "GB02DetectorConstruction.hh"

#include "GB02BOptrMultiParticleForceCollision.hh"

#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4PVPlacement.hh"
#include "G4SystemOfUnits.hh"

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GB02DetectorConstruction::GB02DetectorConstruction(G4bool bf) : fBiasingFlag(bf) {}

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GB02DetectorConstruction::~GB02DetectorConstruction() = default;

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G4VPhysicalVolume* GB02DetectorConstruction::Construct()
{
  G4Material* worldMaterial = G4NistManager::Instance()->FindOrBuildMaterial("G4_Galactic");
  G4Material* defaultMaterial = G4NistManager::Instance()->FindOrBuildMaterial("G4_lN2");

  G4VSolid* solidWorld = new G4Box("World", 10 * m, 10 * m, 10 * m);

  auto logicWorld = new G4LogicalVolume(solidWorld,  // its solid
                                        worldMaterial,  // its material
                                        "World");  // its name

  auto physiWorld = new G4PVPlacement(nullptr,  // no rotation
                                      G4ThreeVector(),  // at (0,0,0)
                                      logicWorld,  // its logical volume
                                      "World",  // its name
                                      nullptr,  // its mother  volume
                                      false,  // no boolean operation
                                      0);  // copy number

  // -----------------------------------
  // -- volume where biasing is applied:
  // -----------------------------------
  G4double halfZ = 10 * cm;
  G4VSolid* solidTest = new G4Box("test.solid", 1 * m, 1 * m, halfZ);

  auto logicTest = new G4LogicalVolume(solidTest,  // its solid
                                       defaultMaterial,  // its material
                                       "test.logical");  // its name

  new G4PVPlacement(nullptr,  // no rotation
                    G4ThreeVector(0, 0, halfZ),  // volume entrance at (0,0,0)
                    logicTest,  // its logical volume
                    "test.phys",  // its name
                    logicWorld,  // its mother  volume
                    false,  // no boolean operation
                    0);  // copy number

  return physiWorld;
}

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void GB02DetectorConstruction::ConstructSDandField()
{
  if (fBiasingFlag) {
    // -- Fetch volume for biasing:
    G4LogicalVolume* logicTest = G4LogicalVolumeStore::GetInstance()->GetVolume("test.logical");

    // ----------------------------------------------
    // -- operator creation and attachment to volume:
    // ----------------------------------------------
    auto testMany = new GB02BOptrMultiParticleForceCollision();
    testMany->AddParticle("gamma");
    testMany->AddParticle("neutron");
    testMany->AttachTo(logicTest);
    G4cout << " Attaching biasing operator " << testMany->GetName() << " to logical volume "
           << logicTest->GetName() << G4endl;
  }
}

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