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

#include "DetectorConstruction.hh"

#include "G4Box.hh"
#include "G4Cons.hh"
#include "G4LogicalVolume.hh"
#include "G4NistManager.hh"
#include "G4PVPlacement.hh"
#include "G4SystemOfUnits.hh"
#include "G4Trd.hh"

namespace B1
{

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G4VPhysicalVolume* DetectorConstruction::Construct()
{
  // Get nist material manager
  G4NistManager* nist = G4NistManager::Instance();

  // Envelope parameters
  //
  G4double env_sizeXY = 20 * cm, env_sizeZ = 30 * cm;
  G4Material* env_mat = nist->FindOrBuildMaterial("G4_WATER");

  // Option to switch on/off checking of volumes overlaps
  //
  G4bool checkOverlaps = true;

  //
  // World
  //
  G4double world_sizeXY = 1.2 * env_sizeXY;
  G4double world_sizeZ = 1.2 * env_sizeZ;
  G4Material* world_mat = nist->FindOrBuildMaterial("G4_AIR");

  auto solidWorld =
    new G4Box("World",  // its name
              0.5 * world_sizeXY, 0.5 * world_sizeXY, 0.5 * world_sizeZ);  // its size

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

  auto physWorld = 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
                                     checkOverlaps);  // overlaps checking

  //
  // Envelope
  //
  auto solidEnv = new G4Box("Envelope",  // its name
                            0.5 * env_sizeXY, 0.5 * env_sizeXY, 0.5 * env_sizeZ);  // its size

  auto logicEnv = new G4LogicalVolume(solidEnv,  // its solid
                                      env_mat,  // its material
                                      "Envelope");  // its name

  new G4PVPlacement(nullptr,  // no rotation
                    G4ThreeVector(),  // at (0,0,0)
                    logicEnv,  // its logical volume
                    "Envelope",  // its name
                    logicWorld,  // its mother  volume
                    false,  // no boolean operation
                    0,  // copy number
                    checkOverlaps);  // overlaps checking

  //
  // Shape 1
  //
  G4Material* shape1_mat = nist->FindOrBuildMaterial("G4_A-150_TISSUE");
  G4ThreeVector pos1 = G4ThreeVector(0, 2 * cm, -7 * cm);

  // Conical section shape
  G4double shape1_rmina = 0. * cm, shape1_rmaxa = 2. * cm;
  G4double shape1_rminb = 0. * cm, shape1_rmaxb = 4. * cm;
  G4double shape1_hz = 3. * cm;
  G4double shape1_phimin = 0. * deg, shape1_phimax = 360. * deg;
  auto solidShape1 = new G4Cons("Shape1", shape1_rmina, shape1_rmaxa, shape1_rminb, shape1_rmaxb,
                                shape1_hz, shape1_phimin, shape1_phimax);

  auto logicShape1 = new G4LogicalVolume(solidShape1,  // its solid
                                         shape1_mat,  // its material
                                         "Shape1");  // its name

  new G4PVPlacement(nullptr,  // no rotation
                    pos1,  // at position
                    logicShape1,  // its logical volume
                    "Shape1",  // its name
                    logicEnv,  // its mother  volume
                    false,  // no boolean operation
                    0,  // copy number
                    checkOverlaps);  // overlaps checking

  //
  // Shape 2
  //
  G4Material* shape2_mat = nist->FindOrBuildMaterial("G4_BONE_COMPACT_ICRU");
  G4ThreeVector pos2 = G4ThreeVector(0, -1 * cm, 7 * cm);

  // Trapezoid shape
  G4double shape2_dxa = 12 * cm, shape2_dxb = 12 * cm;
  G4double shape2_dya = 10 * cm, shape2_dyb = 16 * cm;
  G4double shape2_dz = 6 * cm;
  auto solidShape2 =
    new G4Trd("Shape2",  // its name
              0.5 * shape2_dxa, 0.5 * shape2_dxb, 0.5 * shape2_dya, 0.5 * shape2_dyb,
              0.5 * shape2_dz);  // its size

  auto logicShape2 = new G4LogicalVolume(solidShape2,  // its solid
                                         shape2_mat,  // its material
                                         "Shape2");  // its name

  new G4PVPlacement(nullptr,  // no rotation
                    pos2,  // at position
                    logicShape2,  // its logical volume
                    "Shape2",  // its name
                    logicEnv,  // its mother  volume
                    false,  // no boolean operation
                    0,  // copy number
                    checkOverlaps);  // overlaps checking

  // Set Shape2 as scoring volume
  //
  fScoringVolume = logicShape2;

  //
  // always return the physical World
  //
  return physWorld;
}

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}  // namespace B1
