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/// \file DetectorConstruction0.cc
/// \brief Implementation of the Common::DetectorConstruction0 class

#include "DetectorConstruction0.hh"

#include "G4Box.hh"
#include "G4GenericMessenger.hh"
#include "G4LogicalVolume.hh"
#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4PVPlacement.hh"

namespace Common
{

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DetectorConstruction0::DetectorConstruction0(const G4String& materialName, G4double hx, G4double hy,
                                             G4double hz)
  : fMaterialName(materialName), fDimensions(hx, hy, hz)
{
  DefineCommands();
}

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DetectorConstruction0::~DetectorConstruction0()
{
  delete fMessenger;
}

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G4VPhysicalVolume* DetectorConstruction0::Construct()
{
  // Define materials via NIST manager
  //
  auto nistManager = G4NistManager::Instance();

  auto material = nistManager->FindOrBuildMaterial(fMaterialName);

  // World
  //
  auto sWorld = new G4Box("World",  // name
                          fDimensions.x(),  // dimensions (half-lentghs)
                          fDimensions.y(), fDimensions.z());

  fWorldVolume = new G4LogicalVolume(sWorld,  // shape
                                     material,  // material
                                     "World");  // name

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

  // always return the root volume
  //
  return pWorld;
}

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void DetectorConstruction0::SetMaterial(const G4String& materialName)
{
  auto nistManager = G4NistManager::Instance();

  auto newMaterial = nistManager->FindOrBuildMaterial(materialName);
  if (!newMaterial) {
    G4cerr << "Material " << materialName << " not found." << G4endl;
    G4cerr << "The box material was not changed." << G4endl;
    return;
  }

  if (fWorldVolume) fWorldVolume->SetMaterial(newMaterial);
  G4cout << "Material of box changed to " << materialName << G4endl;
}

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void DetectorConstruction0::SetDimensions(G4ThreeVector dimensions)
{
  /// Set world dimension (in half lengths).
  /// This setting has effect only if called in PreInit> phase

  fDimensions = dimensions;
}

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void DetectorConstruction0::DefineCommands()
{
  // Define /B5/detector command directory using generic messenger class
  fMessenger = new G4GenericMessenger(this, "/detector/", "Detector control");

  // setMaterial command
  auto& setMaterialCmd = fMessenger->DeclareMethod(
    "setMaterial", &DetectorConstruction0::SetMaterial, "Set world material name.");
  setMaterialCmd.SetParameterName("materialName", false);
  setMaterialCmd.SetDefaultValue("G4_AIR");
  setMaterialCmd.SetStates(G4State_PreInit);

  // setDimensions command
  auto& setDimensionsCmd =
    fMessenger->DeclareMethodWithUnit("setDimensions", "mm", &DetectorConstruction0::SetDimensions,
                                      "Set world dimensions (in half lentgh).");
  setDimensionsCmd.SetParameterName("dimensions", false);
  setDimensionsCmd.SetStates(G4State_PreInit);
}

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

}  // namespace Common
