CbmL1Counters.h

/* Copyright (C) 2010-2017 Frankfurt Institute for Advanced Studies, Goethe-Universität Frankfurt, Frankfurt
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Igor Kulakov [committer], Maksym Zyzak */

#ifndef CbmL1Counters_H
#define CbmL1Counters_H

#include "TString.h"

#include <fstream>
#include <iomanip>
#include <iostream>
#include <map>

#include "L1Vector.h"

/// counters used for efficiency calculation
template<typename T>
struct TL1TracksCatCounters  // counters for different tracks categories
{
  TL1TracksCatCounters() { counters.reserve(20); }

  TL1TracksCatCounters(int nCounters) { counters.reset(nCounters, T(0)); };

  int GetNcounters() const { return counters.size(); }

  void AddCounter() { counters.push_back_no_warning(T(0)); };

  void AddCounters(int nCounters) { counters.enlarge(GetNcounters() + nCounters, T(0)); };

  TL1TracksCatCounters& operator+=(TL1TracksCatCounters& a)
  {
    if (GetNcounters() != a.GetNcounters()) {
      std::cout << " TL1TracksCatCounters: Error. Addition of counters of "
                   "different sizes: "
                << GetNcounters() << " " << a.GetNcounters() << std::endl;
    }
    else {
      for (int iC = 0; iC < GetNcounters(); iC++) {
        counters[iC] += a.counters[iC];
      }
    }
    return *this;
  };

  TL1TracksCatCounters operator+(TL1TracksCatCounters& a)
  {
    TL1TracksCatCounters res = *this;
    res += a;
    return res;
  };

  template<typename T2>
  TL1TracksCatCounters<double> operator/(TL1TracksCatCounters<T2>& a)
  {
    TL1TracksCatCounters<double> b(GetNcounters());
    if (GetNcounters() != a.GetNcounters()) {
      std::cout << " TL1TracksCatCounters: Error. Addition of counters of "
                   "different sizes: "
                << GetNcounters() << " " << a.GetNcounters() << std::endl;
    }
    else {
      for (int iC = 0; iC < GetNcounters(); iC++) {
        b.counters[iC] = Div(counters[iC], a.counters[iC]);
      }
    }
    return b;
  };

  template<typename T2>
  TL1TracksCatCounters<T2> operator/(double a)
  {
    TL1TracksCatCounters<T2> b(GetNcounters());
    for (int iC = 0; iC < GetNcounters(); iC++) {
      b.counters[iC] = static_cast<T2>(Div(counters[iC], a));
    }
    return b;
  };

  friend std::fstream& operator<<(std::fstream& strm, const TL1TracksCatCounters<T>& a)
  {
    strm << a.GetNcounters() << " " << a.counters.size() << " ";
    for (unsigned int iV = 0; iV < a.counters.size(); iV++)
      strm << a.counters[iV] << " ";
    strm << std::endl;
    return strm;
  }

  friend std::ostream& operator<<(std::ostream& strm, const TL1TracksCatCounters<T>& a)
  {
    strm << a.counters.size() << " ";
    for (unsigned int iV = 0; iV < a.counters.size(); iV++)
      strm << a.counters[iV] << " ";
    strm << std::endl;
    return strm;
  }

  friend std::fstream& operator>>(std::fstream& strm, TL1TracksCatCounters<T>& a)
  {
    int tmp;
    strm >> tmp;
    a.counters.clear();
    a.counters.reset(tmp, T(0));
    for (int iV = 0; iV < tmp; iV++) {
      T tmp1;
      strm >> tmp1;
      a.counters[iV] = tmp1;
    }
    return strm;
  }

private:
  double Div(double a, double b) { return (b > 0) ? a / b : -1.; };

public:
  L1Vector<T> counters {"TL1TracksCatCounters::counters"};
};

struct TL1Efficiencies {
  TL1Efficiencies()
    : names()
    , indices()
    , ratio_reco()
    , ratio_ghosts(0)
    , ratio_clones(0)
    , mc()
    , reco()
    , ghosts(0)
    , clones(0)
    , nEvents(0) {
        // you should add counter with shortname="total" !!
      };

  virtual ~TL1Efficiencies() {};

  virtual void AddCounter(TString shortname, TString name);

  TL1Efficiencies& operator+=(TL1Efficiencies& a);
  void CalcEff();
  void Inc(bool isReco,
           TString name);  // increment counters according to parameters
  void IncNEvents() { nEvents++; };

  void PrintEff();


  std::vector<TString> names;      // names counters indexed by index of counter
  std::map<TString, int> indices;  // indices of counters indexed by a counter shortname

  TL1TracksCatCounters<double> ratio_reco;
  double ratio_ghosts;
  double ratio_clones;

  TL1TracksCatCounters<int> mc;
  TL1TracksCatCounters<int> reco;
  int ghosts;
  int clones;
  int nEvents;
};

inline void TL1Efficiencies::AddCounter(TString shortname, TString name)
{
  indices[shortname] = names.size();
  names.push_back(name);

  ratio_reco.AddCounter();
  mc.AddCounter();
  reco.AddCounter();
}

inline void TL1Efficiencies::CalcEff()
{
  ratio_reco         = reco / mc;
  const double total = reco.counters[indices["total"]] + ghosts + clones;
  if (total > 0) {
    ratio_clones = clones / total;
    ratio_ghosts = ghosts / total;
  }
  else {
    ratio_clones = -1;
    ratio_ghosts = -1;
  }
};

inline TL1Efficiencies& TL1Efficiencies::operator+=(TL1Efficiencies& a)
{
  mc += a.mc;
  reco += a.reco;
  ghosts += a.ghosts;
  clones += a.clones;
  nEvents += a.nEvents;

  return *this;
};

inline void TL1Efficiencies::Inc(bool isReco, TString name)
{
  const int index = indices[name];

  mc.counters[index]++;
  if (isReco) reco.counters[index]++;
};

inline void TL1Efficiencies::PrintEff()
{
  std::ios_base::fmtflags coutFlags(std::cout.flags());
  std::cout.setf(std::ios::fixed);
  std::cout.setf(std::ios::showpoint);
  std::cout.precision(3);
  std::cout.setf(std::ios::right);
  std::cout << "Track category         : "
            << " Eff "
            << " | "
            << "All MC" << std::endl;

  int NCounters = mc.GetNcounters();
  for (int iC = 0; iC < NCounters; iC++) {
    std::cout << names[iC] << "   : " << ratio_reco.counters[iC] << "  | " << mc.counters[iC] << std::endl;
  }

  std::cout << "Clone     probability  : " << ratio_clones << " | " << clones << std::endl;
  std::cout << "Ghost     probability  : " << ratio_ghosts << " | " << ghosts << std::endl;
  std::cout.flags(coutFlags);
};

#endif