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/// \file DicomDetectorConstruction.hh
/// \brief Definition of the DicomDetectorConstruction class

#ifndef DicomDetectorConstruction_h
#define DicomDetectorConstruction_h 1

#include "DicomPhantomZSliceHeader.hh"

#include "G4ThreeVector.hh"
#include "G4VUserDetectorConstruction.hh"
#include "globals.hh"

#include <map>
#include <set>

class G4Material;
class G4Box;
class G4LogicalVolume;
class DicomPhantomZSliceMerged;

//*******************************************************
/// Dicom detector construction
///
///      - Start the building of the geometry
///      - Initialisation of materials
///      - Creation of the world
///      - Reading of the DICOM data
///
/// History: 30.11.07  First version
/// \author  P. Arce
//*******************************************************

struct matInfo
{
    G4double fSumdens;
    G4int fNvoxels;
    G4int fId;
};

class DicomDetectorConstruction : public G4VUserDetectorConstruction
{
  public:
    DicomDetectorConstruction();
    ~DicomDetectorConstruction();

    virtual G4VPhysicalVolume* Construct();
    // trigger the construction of the geometry

    G4int GetTotalVoxels() const;

  protected:
    void InitialisationOfMaterials();
    // create the original materials

    void ReadPhantomData();
    void ReadPhantomDataNew();
    // read the DICOM files describing the phantom
    void ReadVoxelDensities(std::ifstream& fin);

    void ReadPhantomDataFile(const G4String& fname);
    // read one of the DICOM files describing the phantom
    // (usually one per Z slice).
    //  Build a DicomPhantomZSliceHeader for each file

    void MergeZSliceHeaders();
    // merge the slice headers of all the files

    G4Material* BuildMaterialWithChangingDensity(const G4Material* origMate, G4float density,
                                                 G4String newMateName);
    // build a new material if the density of the voxel is different
    // to the other voxels

    void ConstructPhantomContainer();
    void ConstructPhantomContainerNew();
    virtual void ConstructPhantom() = 0;
    // construct the phantom volumes.
    //  This method should be implemented for each of the derived classes

    void SetScorer(G4LogicalVolume* voxel_logic);

    virtual void ConstructSDandField();

  protected:
    G4Material* fAir;

    // World ...
    G4Box* fWorld_solid;
    G4LogicalVolume* fWorld_logic;
    G4VPhysicalVolume* fWorld_phys;

    G4Box* fContainer_solid;
    G4LogicalVolume* fContainer_logic;
    G4VPhysicalVolume* fContainer_phys;

    G4int fNoFiles;  // number of DICOM files
    std::vector<G4Material*> fOriginalMaterials;  // list of original materials
    std::vector<G4Material*> fMaterials;
    // list of new materials created to distinguish different density
    //  voxels that have the same original materials
    size_t* fMateIDs;  // index of material of each voxel
    // unsigned int* fMateIDs; // index of material of each voxel

    std::map<G4int, G4double> fDensityDiffs;
    // Density difference to distinguish material for each original
    // material (by index)

    std::vector<DicomPhantomZSliceHeader*> fZSliceHeaders;
    // list of z slice header (one per DICOM files)
    DicomPhantomZSliceHeader* fZSliceHeaderMerged;
    // z slice header resulted from merging all z slice headers

    G4int fNoVoxelsX, fNoVoxelsY, fNoVoxelsZ;
    G4double fVoxelHalfDimX, fVoxelHalfDimY, fVoxelHalfDimZ;
    G4double fMinX, fMinY, fMinZ;  // minimum extension of voxels (position wall)
    G4double fMaxX, fMaxY, fMaxZ;  // maximum extension of voxels (position wall)

    std::map<G4int, G4Material*> fPhantomMaterialsOriginal;
    // map numberOfMaterial to G4Material. They are the list of materials as
    // built from .geom file

    DicomPhantomZSliceMerged* fMergedSlices;

    std::set<G4LogicalVolume*> fScorers;

    G4bool fConstructed;
};

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

inline G4int DicomDetectorConstruction::GetTotalVoxels() const
{
  return fNoVoxelsX * fNoVoxelsY * fNoVoxelsZ;
}

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

#endif
