#ifndef Histos_H
#define Histos_H

/**
 * This class provides an interface to root histograms
 *
 * \author Patrick Janot
 * $Date: 16 Jan 2004 19:30 */
// for debugging

//#include "TROOT.h"
#include "TObject.h"

#include <string>
#include <map>
#include <iostream>
//#include <sstream>

class Histos {
public:
  typedef std::map<std::string, TObject*>::const_iterator HistoItr;

  static Histos* instance();

  /// Destructor
  virtual ~Histos();

  /// Book an histogram (1D or 2D)
  void book(const std::string& name, int nx, float xmin, float xmax, int ny = 0, float ymin = 0., float ymax = 0.);

  // Same as before. Creates n2-n1 histos with name name+n1 ... name+n2
  void bookByNumber(const std::string& name,
                    int n1,
                    int n2,
                    int nx,
                    float xmin,
                    float xmax,
                    int ny = 0,
                    float ymin = 0.,
                    float ymax = 0.);

  /// Book a TProfile
  /// option="S" -> spread
  ///        ""  -> error on mean (from Root documentation)
  void book(const std::string& name, int nx, float xmin, float xmax, const std::string& option);

  /// Write one or all histogram(s) in a file
  void put(const std::string& file, std::string name = "");

  /// Divide two histograms and put the result in the first
  void divide(const std::string& h1, const std::string& h2, const std::string& h3);

  /// Fill an histogram
  void fill(const std::string& name, float val1, float val2 = 1., float val3 = 1.);

  // Fill a series of histos. The name is name+number
  void fillByNumber(const std::string& name, int number, float val1, float val2 = 1., float val3 = 1.);

  /// Add any object
  void addObject(const std::string& name, TObject* obj);

  ///
  void debug(std::string p = "") const { std::cout << " Histos myMap : " << &theHistos << " " << p << std::endl; }

private:
  // The constructor is hidden as we do not want to construct
  // more than one instance.
  Histos();

  // The instance
  static Histos* myself;

  // The histos booked
  TObject* theHisto;
  std::map<std::string, TObject*> theHistos;
  std::map<std::string, unsigned> theTypes;
  std::map<std::string, TObject*> theObjects;
};
#endif
