//| This file is a part of the sferes2 framework.
//| Copyright 2009, ISIR / Universite Pierre et Marie Curie (UPMC)
//| Main contributor(s): Jean-Baptiste Mouret, mouret@isir.fr
//|
//| This software is a computer program whose purpose is to facilitate
//| experiments in evolutionary computation and evolutionary robotics.
//|
//| This software is governed by the CeCILL license under French law
//| and abiding by the rules of distribution of free software.  You
//| can use, modify and/ or redistribute the software under the terms
//| of the CeCILL license as circulated by CEA, CNRS and INRIA at the
//| following URL "http://www.cecill.info".
//|
//| As a counterpart to the access to the source code and rights to
//| copy, modify and redistribute granted by the license, users are
//| provided only with a limited warranty and the software's author,
//| the holder of the economic rights, and the successive licensors
//| have only limited liability.
//|
//| In this respect, the user's attention is drawn to the risks
//| associated with loading, using, modifying and/or developing or
//| reproducing the software by the user in light of its specific
//| status of free software, that may mean that it is complicated to
//| manipulate, and that also therefore means that it is reserved for
//| developers and experienced professionals having in-depth computer
//| knowledge. Users are therefore encouraged to load and test the
//| software's suitability as regards their requirements in conditions
//| enabling the security of their systems and/or data to be ensured
//| and, more generally, to use and operate it in the same conditions
//| as regards security.
//|
//| The fact that you are presently reading this means that you have
//| had knowledge of the CeCILL license and that you accept its terms.




#ifndef BEST_FIT_
#define BEST_FIT_

#include <boost/serialization/shared_ptr.hpp>
#include <boost/serialization/nvp.hpp>
#include <sferes/stat/stat.hpp>
#include <sferes/fit/fitness.hpp>

namespace sferes {
  namespace stat {
    SFERES_STAT(BestFit, Stat) {
    public:
      template<typename E>
      void refresh(const E& ea) {
        assert(!ea.pop().empty());
        _best = *std::max_element(ea.pop().begin(), ea.pop().end(), fit::compare_max());

        this->_create_log_file(ea, "bestfit.dat");
        if (ea.dump_enabled())
          (*this->_log_file) << ea.gen() << " " << ea.nb_evals() << " " << _best->fit().value() << std::endl;
      }
      void show(std::ostream& os, size_t k) {
        _best->develop();
        _best->show(os);
        _best->fit().set_mode(fit::mode::view);
        _best->fit().eval(*_best);
      }
      const boost::shared_ptr<Phen> best() const {
        return _best;
      }
      template<class Archive>
      void serialize(Archive & ar, const unsigned int version) {
        ar & BOOST_SERIALIZATION_NVP(_best);
      }
    protected:
      boost::shared_ptr<Phen> _best;
    };
  }
}
#endif
