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// Base class for common implementation for histograms managers.
//
// Author: Ivana Hrivnacova, 10/08/2022  (ivana@ipno.in2p3.fr)

#ifndef G4VTBaseHnManager_h
#define G4VTBaseHnManager_h 1

#include "G4HnInformation.hh"
#include "globals.hh"

#include <vector>
#include <memory>
#include <array>

class G4HnManager;

template <unsigned int DIM>
class G4VTBaseHnManager
{
  // Disable using the object managers outside
  friend class G4VAnalysisManager;
  friend class G4VAnalysisReader;

  public:
    G4VTBaseHnManager() = default;
    virtual ~G4VTBaseHnManager() = default;

    // deleted copy constructor & assignment operator
    G4VTBaseHnManager(const G4VTBaseHnManager& rhs) = delete;
    G4VTBaseHnManager& operator=(const G4VTBaseHnManager& rhs) = delete;

    // Methods for handling histograms
    virtual G4int Create(const G4String& name, const G4String& title,
               const std::array<G4HnDimension, DIM>& bins,
               const std::array<G4HnDimensionInformation, DIM>& hnInfo) = 0;

    // virtual G4int Create(const G4String& name, const G4String& title,
    //            const std::array<std::vector<G4double>, DIM> edges,
    //            const std::array<G4HnDimensionInformation, DIM>& hnInfo) = 0;

    virtual G4bool Set(G4int id,
               const std::array<G4HnDimension, DIM>& bins,
               const std::array<G4HnDimensionInformation, DIM>& hnInfo) = 0;

    // virtual G4bool Set(G4int id,
    //            const std::array<std::vector<G4double>, DIM>& edges,
    //            const std::array<G4HnDimensionInformation, DIM>& hnInfo) = 0;

    virtual G4bool Scale(G4int id, G4double factor) = 0;

    // Methods to fill histograms
    virtual G4bool Fill(G4int id, std::array<G4double, DIM> value, G4double weight = 1.0) = 0;

    // Access methods
    virtual G4int  GetId(const G4String& name, G4bool warn = true) const = 0;
    virtual G4int  GetNofHns(G4bool onlyExisting) const = 0;

    // Access to bins parameters
    virtual G4int    GetNbins(unsigned int idim, G4int id) const = 0;
    virtual G4double GetMinValue(unsigned int idim, G4int id) const = 0;
    virtual G4double GetMaxValue(unsigned int idim, G4int id) const = 0;
    virtual G4double GetWidth(unsigned int idim, G4int id) const = 0;

    // Setters for attributes for plotting
    virtual G4bool SetTitle(G4int id, const G4String& title) = 0;
    virtual G4bool SetAxisTitle(unsigned int idim, G4int id, const G4String& title) = 0;

    // Access attributes for plotting
    virtual G4String GetTitle(G4int id) const = 0;
    virtual G4String GetAxisTitle(unsigned int idim, G4int id) const = 0;

    // Methods to list/print histograms
    virtual G4bool WriteOnAscii(std::ofstream& output) = 0;
    virtual G4bool List(std::ostream& output, G4bool onlyIfActive = true) = 0;

    // Methods to delete selected histograms
    virtual G4bool Delete(G4int id, G4bool keepSetting) = 0;

    virtual std::shared_ptr<G4HnManager> GetHnManager() = 0;
    virtual const std::shared_ptr<G4HnManager> GetHnManager() const = 0;
};

#endif