/* @(#)root/gdml:$Id$ */
// Authors: Ben Lloyd 09/11/06

/*************************************************************************
 * Copyright (C) 1995-2006, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/

#ifndef ROOT_TGDMLParse
#define ROOT_TGDMLParse

#include "TFormula.h"
#include "TXMLEngine.h"
#include "TGeoMatrix.h"
#include "TGeoVolume.h"
#include "TGeoElement.h"

#include <map>
#include <iostream>

class TGDMLMatrix;

/*************************************************************************
 * TGDMLRefl - helper class for the import of GDML to ROOT.              *
 *************************************************************************/

class TGDMLRefl : public TObject {
public:
   TGDMLRefl()
   {

      fNameS = "";
      fSolid = "";
      fMatrix = nullptr;
   }

   ~TGDMLRefl() override {}

   TGDMLRefl(const char *name, const char *solid, TGeoMatrix *matrix);
   TGeoMatrix *GetMatrix();

private:
   const char *fNameS;  //! reflected solid name
   const char *fSolid;  //! solid name being reflected
   TGeoMatrix *fMatrix; //! matrix of reflected solid

   ClassDefOverride(TGDMLRefl, 0) // helper class used for the storage of reflected solids
};

/*************************************************************************
 * TGDMLParse - base class for the import of GDML to ROOT.               *
 *************************************************************************/

class TGDMLBaseTGDMMapHelper : public std::map<std::string, const void *> {
};

// map's [] operator returns reference.
// to avoid ugly UB casts like static_cast<SomeType * &>(voidPtrLValue)
// I have this helper class.
template <typename T>

class TGDMAssignmentHelper {
private:
   TGDMLBaseTGDMMapHelper::iterator fPosInMap;

public:
   TGDMAssignmentHelper(TGDMLBaseTGDMMapHelper &baseMap, const std::string &key)
   {
      baseMap[key]; // if we do not have this key-value pair before, insert it now (with zero for pointer).
      // find iterator for this key now :)
      fPosInMap = baseMap.find(key);
   }

   operator T *() const
   {
      return (T *)fPosInMap->second; // const_cast<T*>(static_cast<const T *>(fPosInMap->second));
   }

   TGDMAssignmentHelper &operator=(const T *ptr)
   {
      fPosInMap->second = ptr;
      return *this;
   }
};

template <class T>
class TGDMMapHelper : public TGDMLBaseTGDMMapHelper {
public:
   TGDMAssignmentHelper<T> operator[](const std::string &key) { return TGDMAssignmentHelper<T>(*this, key); }
};

class TGDMLParse : public TObject {
public:
   TString fWorldName;
   TGeoVolume *fWorld;          // top volume of geometry
   int fVolID;                  // volume ID, incremented as assigned.
   int fFILENO;                 // Holds which level of file the parser is at
   int fNunitless{0};           // Number of entities defined unitless
   TXMLEngine *fFileEngine[20]; // array of dom object pointers
   const char *fStartFile;      // name of originating file
   const char *fCurrentFile;    // current file name being parsed
   std::string fDefault_lunit = "mm";
   std::string fDefault_aunit = "rad";

   TGDMLParse();
   ~TGDMLParse() override {}

   static TGeoVolume *StartGDML(const char *filename)
   {
      TGDMLParse *parser = new TGDMLParse;
      TGeoVolume *world = parser->GDMLReadFile(filename);
      return world;
   }

   TGeoVolume *GDMLReadFile(const char *filename = "test.gdml");

private:
   const char *ParseGDML(TXMLEngine *gdml, XMLNodePointer_t node);
   TString GetScale(const char *unit);
   double GetScaleVal(const char *unit);
   double Evaluate(const char *evalline);
   const char *NameShort(const char *name);
   double Value(const char *svalue) const;
   void DefineConstants();

   //'define' section
   XMLNodePointer_t ConProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t PosProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t QuantityProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t RotProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t SclProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t MatrixProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);

   //'materials' section
   XMLNodePointer_t IsoProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLNodePointer_t parentn);
   XMLNodePointer_t EleProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLNodePointer_t parentn, Bool_t hasIsotopes,
                               Bool_t hasIsotopesExtended);
   XMLNodePointer_t MatProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr, int z);

   //'solids' section
   XMLNodePointer_t OpticalSurfaceProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t BooSolid(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr, int num);
   XMLNodePointer_t Box(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Paraboloid(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Arb8(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Tube(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t CutTube(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Cone(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t ElCone(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Trap(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Trd(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Polycone(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Polyhedra(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Sphere(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Torus(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Hype(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Para(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t TwistTrap(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t ElTube(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Orb(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Xtru(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Reflection(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Ellipsoid(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t Tessellated(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t ScaledSolid(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);

   //'structure' section
   XMLNodePointer_t VolProcess(TXMLEngine *gdml, XMLNodePointer_t node);
   XMLNodePointer_t AssProcess(TXMLEngine *gdml, XMLNodePointer_t node);
   XMLNodePointer_t UsrProcess(TXMLEngine *gdml, XMLNodePointer_t node);
   XMLNodePointer_t SkinSurfaceProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   XMLNodePointer_t BorderSurfaceProcess(TXMLEngine *gdml, XMLNodePointer_t node, XMLAttrPointer_t attr);
   Int_t SetAxis(const char *axisString); // Set Axis for Division

   //'setup' section
   XMLNodePointer_t TopProcess(TXMLEngine *gdml, XMLNodePointer_t node);

   // Find defined objects by name
   TGeoTranslation *GetPosition(const char *name);
   TGeoRotation *GetRotation(const char *name);
   TGeoScale *GetScaleObj(const char *name);
   TGeoShape *GetSolid(const char *name);
   TGeoVolume *GetVolume(const char *name);

   typedef TGDMMapHelper<TGeoTranslation> PosMap;
   typedef TGDMMapHelper<TGeoRotation> RotMap;
   typedef TGDMMapHelper<TGeoScale> SclMap;
   typedef TGDMMapHelper<TGeoElement> EleMap;
   typedef TGDMMapHelper<TGeoIsotope> IsoMap;
   typedef TGDMMapHelper<TGeoMaterial> MatMap;
   typedef TGDMMapHelper<TGeoMedium> MedMap;
   typedef TGDMMapHelper<TGeoMixture> MixMap;

   typedef TGDMMapHelper<TGeoShape> SolMap;
   typedef TGDMMapHelper<TGeoVolume> VolMap;
   typedef TGDMMapHelper<TGeoNode> PvolMap;
   typedef TGDMMapHelper<TGDMLMatrix> MatrixMap;
   typedef TGDMMapHelper<TGDMLRefl> ReflSolidMap;
   typedef TGDMMapHelper<const char> FileMap;
   typedef std::map<std::string, std::string> ReflectionsMap;
   typedef std::map<std::string, std::string> ReflVolMap;
   typedef std::map<std::string, double> FracMap;
   typedef std::map<std::string, double> ConstMap;

   PosMap fposmap;             //! Map containing position names and the TGeoTranslation for it
   RotMap frotmap;             //! Map containing rotation names and the TGeoRotation for it
   SclMap fsclmap;             //! Map containing scale names and the TGeoScale for it
   IsoMap fisomap;             //! Map containing isotope names and the TGeoIsotope for it
   EleMap felemap;             //! Map containing element names and the TGeoElement for it
   MatMap fmatmap;             //! Map containing material names and the TGeoMaterial for it
   MedMap fmedmap;             //! Map containing medium names and the TGeoMedium for it
   MixMap fmixmap;             //! Map containing mixture names and the TGeoMixture for it
   SolMap fsolmap;             //! Map containing solid names and the TGeoShape for it
   VolMap fvolmap;             //! Map containing volume names and the TGeoVolume for it
   PvolMap fpvolmap;           //! Map containing placed volume names and the TGeoNode for it
   ReflectionsMap freflectmap; //! Map containing reflection names and the Solid name ir references to
   ReflSolidMap freflsolidmap; //! Map containing reflection names and the TGDMLRefl for it - containing refl matrix
   ReflVolMap freflvolmap;     //! Map containing reflected volume names and the solid ref for it
   FileMap ffilemap;           //! Map containing files parsed during entire parsing, with their world volume name
   ConstMap fconsts;           //! Map containing values of constants declared in the file
   MatrixMap fmatrices;        //! Map containing matrices defined in the GDML file

   ClassDefOverride(TGDMLParse, 0) // imports GDML using DOM and binds it to ROOT
};

#endif
