/// @file ReadGeoDescription.hh
/// @brief Header file for the geometry description reader class.

#ifndef ReadGeoDescriptions_hh
#define ReadGeoDescriptions_hh

// Standard include statements.
#include <string>
#include <vector>
#include <map>

// Allpix include statements.
#include "AllPixGeoDsc.hh"
#include "Utils.h"

// GEANT4 include statements.
#include "G4Types.hh"

using namespace std;

using namespace Utils;

class TXMLNode;

#define __FIRST_DET_INDX 0

/// @brief A class for reading the geometry description.
///
/// @author J. Idarraga (principle author - idarraga@cern.ch)
/// @author T. Whyntie (editor, CERN\@school - t.whyntie@qmul.ac.uk)
class ReadGeoDescription {

 public:

  /// @brief The constructor.
  ReadGeoDescription() {};

  ReadGeoDescription(string);

  /// @brief The destructor.
  ~ReadGeoDescription(){};

  static ReadGeoDescription * GetInstance();

  map<int, AllPixGeoDsc *> * GetDetectorsMap(){return &m_detsGeo;};

  void BuildListOfExpectedTags();

  void ParseContext(TXMLNode *);

  bool StringIsRelevant(string);

  vector<int> ProcessIdString(const char *);

  /// @brief Replicate a detector if required.
  ///
  /// i.e. create new instances by copying from the first object in
  /// the vector.
  void ReplicateDetectors();

  /// @brief Keep only the detectors that will be used.
  ///
  /// @param [in] dets Vector of the detector IDs to be used.
  G4int UseTheseDetectorsOnly(vector<G4int> dets);

 private:

  string m_xmlfile;

  string m_currentNodeName;

  string m_currentAtt;

  map<int, AllPixGeoDsc *> m_detsGeo;
  //vector<int> m_detsGeoIndx;

  map<int, vector<int> > m_detsGeoIndx;

  int m_firstIndx;

  // map for replicated detectors
  //vector<vector<int> > m_replicationVector;

  map<string, double> m_unitsMap;

};//end of ReadGeoDescription class definition.

#endif