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// Author: Ivana Hrivnacova, 04/07/2012  (ivana@ipno.in2p3.fr)

#ifndef G4AnalysisUtilities_h
#define G4AnalysisUtilities_h 1

#include "G4Exception.hh"
#include "globals.hh"

#include <vector>
#include <memory>
#include <string_view>

// Enumeration for definition of available output types

enum class G4AnalysisOutput {
  kCsv,
  kHdf5,
  kRoot,
  kXml,
  kNone
};

namespace G4Analysis
{

// Constant expressions
//
constexpr G4int kX { 0 };
constexpr G4int kY { 1 };
constexpr G4int kZ { 2 };
constexpr G4int kInvalidId { -1 };
constexpr G4int kVL0 { 0 };
constexpr G4int kVL1 { 1 };
constexpr G4int kVL2 { 2 };
constexpr G4int kVL3 { 3 };
constexpr G4int kVL4 { 4 };
constexpr unsigned int kDim1 { 1 };
constexpr unsigned int kDim2 { 2 };
constexpr unsigned int kDim3 { 3 };
constexpr unsigned int kMaxDim { kDim3 };
constexpr unsigned int kDefaultBasketSize { 32000 };
constexpr unsigned int kDefaultBasketEntries {4000 };
constexpr std::string_view kNamespaceName { "G4Analysis" };

// Warning
//
void Warn(const G4String& message,
          const std::string_view inClass,
          const std::string_view inFunction);

// Get unit value with added handling of "none"
G4double GetUnitValue(const G4String& unit);

// Tokenizer with taking into account composed strings within ""
void Tokenize(const G4String& line, std::vector<G4String>& tokens);

// Get output type from name
G4AnalysisOutput GetOutput(const G4String& outputName, G4bool warn = true);
size_t GetOutputId(const G4String& outputName, G4bool warn = true);
G4String GetOutputName(G4AnalysisOutput outputType);

// Get short hnType from the tools object
template <typename HT>
G4String GetHnType()
{
  // tools::histo::h1d etc.
  G4String hnTypeLong = HT::s_class();

  // tools::histo::h1d -> h1 etc.
  std::size_t lastColon = hnTypeLong.rfind(":");
  if (lastColon != G4String::npos && lastColon + 1 < hnTypeLong.length()) {
    G4String potentialType = hnTypeLong.substr(lastColon + 1);
    if (potentialType.length() >= 2 &&
        (potentialType.substr(0, 1) == "h" || potentialType.substr(0, 1) == "p")) {
      return potentialType.substr(0, 2);
    }
  }
  G4cerr << "Warning: Could not extract short hnType for " << hnTypeLong << G4endl;
  return "";
}

template <typename HT>
G4bool IsProfile()
{
  // tools::histo::h1d etc.
  G4String hnTypeLong = HT::s_class();
  std::size_t length = hnTypeLong.length();
  return (length >= 3 && hnTypeLong.substr(length - 3) == "p1d") ||
         (length >= 3 && hnTypeLong.substr(length - 3) == "p2d");
}

// String conversion
template <typename T>
inline
std::string ToString(const T& value)
{ return std::to_string(value); }

template <>
inline
std::string ToString<std::string>(const std::string& value)
{ return value; }

// File names utilities

// Get file base name (without dot)
G4String GetBaseName(const G4String& fileName);

// Get file base extension (without dot)
G4String GetExtension(const G4String& fileName,
            const G4String& defaultExtension = "");

// Compose and return the histogram or profile specific file name:
// - add _hn_hnName suffix to the file base name
// - add file extension if not present
G4String GetHnFileName(
            const G4String& fileName,
            const G4String& fileType,
            const G4String& hnType,
            const G4String& hnName);

// Update Hn file name:
// - add _vN  suffix to the base namer if cycle > 0
G4String GetHnFileName(
            const G4String& fileName,
            const G4String& fileType,
            G4int cycle = 0);

// Compose and return the ntuple specific file name:
// - add _nt_ntupleName suffix to the file base name
// - add _vN  suffix if cycle > 0
// - add _tN suffix if called on thread worker
// - add file extension if not present
G4String GetNtupleFileName(
            const G4String& fileName,
            const G4String& fileType,
            const G4String& ntupleName,
            G4int cycle = 0);

// Compose and return the ntuple specific file name:
// - add _mFN suffix to the file base name where FN = ntupleFileNumber
// - add _vN  suffix if cycle > 0
// - add file extension if not present
G4String GetNtupleFileName(
            const G4String& fileName,
            const G4String& fileType,
            G4int ntupleFileNumber,
            G4int cycle = 0);

// Update file base name with the thread suffix:
// - add _vN  suffix if cycle > 0
// - add _tN suffix if called on thread worker
// - add file extension if not present
G4String GetTnFileName(
            const G4String& fileName,
            const G4String& fileType,
            G4int cycle = 0);

// Generate plot file name for an output file name
G4String GetPlotFileName(const G4String& fileName);

}

/*
// make possible to print enumerators in class enum as integer
template <typename Enumeration>
auto as_integer(Enumeration const value)
    -> typename std::underlying_type<Enumeration>::type
{
  return static_cast<typename std::underlying_type<Enumeration>::type>(value);
}
*/

#endif