// @(#)root/mathcore:$Id

/**********************************************************************
 *                                                                    *
 * Copyright (c) 2006  LCG ROOT Math Team, CERN/PH-SFT                *
 *                                                                    *
 *                                                                    *
 **********************************************************************/

// Header file for class GeneticMinimizer

#ifndef ROOT_Math_GeneticMinimizer
#define ROOT_Math_GeneticMinimizer

#include <vector>

#include "Math/Minimizer.h"

#include "TMVA/IFitterTarget.h"
#include "TMVA/Interval.h"

namespace ROOT { 
   namespace Math { 


//_______________________________________________________________________________
/*
  structure containing the parameters of the genetic minimizer 
 */ 
struct GeneticMinimizerParameters { 

   Int_t fPopSize;
   Int_t fNsteps;
   Int_t fCycles; 
   Int_t fSC_steps;
   Int_t fSC_rate;
   Double_t fSC_factor;
   Double_t fConvCrit;
   Int_t fSeed; 
   

   // constructor with default value
   GeneticMinimizerParameters(); 
};



//_______________________________________________________________________________
/** 
   GeneticMinimizer

   @ingroup MultiMin
*/
class GeneticMinimizer: public ROOT::Math::Minimizer {

public: 

   //GeneticMinimizer (int = 0);
   GeneticMinimizer (int i = 0);
   virtual ~GeneticMinimizer ();

   virtual void Clear();
   using ROOT::Math::Minimizer::SetFunction;
   virtual void SetFunction(const ROOT::Math::IMultiGenFunction & func); 

   virtual bool SetLimitedVariable(unsigned int , const std::string& , double , double , double, double);
   virtual bool SetVariable(unsigned int ivar, const std::string & name, double val, double step); 
   virtual bool SetFixedVariable(unsigned int ivar  , const std::string & name , double val); 

   virtual  bool Minimize(); 
   virtual double MinValue() const; 
   virtual double Edm() const; 
   virtual const double *  X() const; 
   virtual const double *  MinGradient() const;  
   virtual unsigned int NCalls() const;    

   virtual unsigned int NDim() const;  
   virtual unsigned int NFree() const;  

   virtual bool ProvidesError() const; 
   virtual const double * Errors() const;

   virtual double CovMatrix(unsigned int i, unsigned int j) const;  

   void SetParameters(const GeneticMinimizerParameters & params );

   void SetRandomSeed(int seed) { fParameters.fSeed = seed; }

   const GeneticMinimizerParameters & MinimizerParameters() const { return fParameters; }

   virtual ROOT::Math::MinimizerOptions Options() const; 

   virtual void SetOptions(const ROOT::Math::MinimizerOptions & opt);

protected:

   void GetGeneticOptions(ROOT::Math::MinimizerOptions & opt) const; 

   std::vector<TMVA::Interval*> fRanges;
   TMVA::IFitterTarget* fFitness;
   double fMinValue;
   std::vector<double> fResult;

   GeneticMinimizerParameters fParameters; 

}; 


   } // end namespace Math
} // end namespace ROOT

#endif /* ROOT_Math_GeneticMinimizer */