//| 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 PARETO_FRONT_HPP_
#define PARETO_FRONT_HPP_

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

namespace sferes
{
  namespace stat
  {
    SFERES_STAT(ParetoFront, Stat)
    {
    public:
      typedef std::vector<boost::shared_ptr<Phen> > pareto_t;
      // asume a ea.pareto_front() method
      template<typename E>
	void refresh(const E& ea)
      {
	_pareto_front = ea.pareto_front();
	parallel::sort(_pareto_front.begin(), _pareto_front.end(), 
		       fit::compare_objs_lex());
	this->_create_log_file(ea, "pareto.dat");
	if (ea.dump_enabled())
	  show_all(*(this->_log_file), ea.gen());
	//this->_log_file->close();
      }
      void show(std::ostream& os, size_t k) const
      {
	os<<"log format : gen id obj_1 ... obj_n"<<std::endl;
	show_all(os, 0);
	_pareto_front[k]->develop();
	_pareto_front[k]->show(os);
	_pareto_front[k]->fit().set_mode(fit::mode::view);
	_pareto_front[k]->fit().eval(*_pareto_front[k]);
	os << "=> displaying individual " << k << std::endl;
	os << "fit:";
	for (size_t i =0; i < _pareto_front[k]->fit().objs().size(); ++i)
	  os << _pareto_front[k]->fit().obj(i) << " ";
	os << std::endl;
	assert(k < _pareto_front.size());

      }
      const pareto_t& pareto_front() const { return _pareto_front; }
      template<class Archive>
      void serialize(Archive & ar, const unsigned int version)
      {
        ar & BOOST_SERIALIZATION_NVP(_pareto_front);
      }
      void show_all(std::ostream& os, size_t gen = 0) const
      {
	for (unsigned i = 0; i < _pareto_front.size(); ++i)
	  {
	    os << gen << " " << i << " ";
	    for (unsigned j = 0; j < _pareto_front[i]->fit().objs().size(); ++j)
	      os << _pareto_front[i]->fit().obj(j) << " ";
	    os << std::endl;;
	  }
      }    

    protected:
      pareto_t _pareto_front;
    };
  }
}
#endif
