/*
Copyright (C) 2007 Joseph L. Chuma, TRIUMF

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
#ifndef EXTREMA_FCN
#define EXTREMA_FCN

#ifdef HAVE_MINUIT
#include <vector>

#include "Minuit/FCNBase.h"

class Expression;

class Extrema_fcn : public FCNBase
{
public:
  Extrema_fcn( std::vector<double> const &d, std::vector<double> const &w ) 
      : FCNBase(), data_(d), weights_(w), errorDef_(1.0), chisqDirect_(false), expression_(0)
  {}
  
  ~Extrema_fcn() 
  {}
  
  virtual double up() const;
  void SetErrorDef( double );
  void SetChisqDirect( bool );
  void SetExpression( Expression * );
  
  virtual double operator()( std::vector<double> const & ) const;
  
private:
  std::vector<double> data_;
  std::vector<double> weights_;
  double errorDef_;
  bool chisqDirect_;
  Expression *expression_;
};
#else
class Extrema_fcn
{};
#endif

#endif
