//| 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.




#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_MODULE eps_moea

#include <boost/test/unit_test.hpp>
#include <cmath>
#include <iostream>
#include <sferes/phen/parameters.hpp>
#include <sferes/gen/evo_float.hpp>
#include <sferes/ea/eps_moea.hpp>
#include <sferes/eval/eval.hpp>
#include <sferes/stat/pareto_front.hpp>
#include <sferes/stat/best_fit.hpp>
#include <sferes/eval/parallel.hpp>
#include <sferes/modif/dummy.hpp>

using namespace sferes;
using namespace sferes::gen::evo_float;

struct Params {
  struct evo_float {

    SFERES_CONST float cross_rate = 0.5f;
    SFERES_CONST float mutation_rate = 1.0f/30.0f;
    SFERES_CONST float eta_m = 15.0f;
    SFERES_CONST float eta_c = 20.0f;
    SFERES_CONST mutation_t mutation_type = polynomial;
    SFERES_CONST cross_over_t cross_over_type = sbx;
  };
  struct pop {
    SFERES_CONST unsigned size = 100;
    SFERES_CONST int dump_period = -1;
    SFERES_ARRAY(float, eps, 0.0075f, 0.0075f);
    SFERES_ARRAY(float, min_fit, 0.0f, 0.0f);
    SFERES_CONST size_t grain = size / 4;
    SFERES_CONST unsigned nb_gen = 60000 / grain;
  };
  struct parameters {
    SFERES_CONST float min = 0.0f;
    SFERES_CONST float max = 1.0f;
  };
};

template<typename Indiv>
float _g(const Indiv &ind) {
  float g = 0.0f;
  assert(ind.size() == 30);
  for (size_t i = 1; i < 30; ++i)
    g += ind.data(i);
  g = 9.0f * g / 29.0f;
  g += 1.0f;
  return g;
}

SFERES_FITNESS(FitZDT2, sferes::fit::Fitness) {
public:
  template<typename Indiv>
  void eval(Indiv& ind) {
    this->_objs.resize(2);
    float f1 = ind.data(0);
    float g = _g(ind);
    float h = 1.0f - powf((f1 / g), 2.0f);
    float f2 = g * h;
    this->_objs[0] = -f1;
    this->_objs[1] = -f2;
  }
};


BOOST_AUTO_TEST_CASE(test_epsmoea) {
  srand(time(0));

  typedef gen::EvoFloat<30, Params> gen_t;
  typedef phen::Parameters<gen_t, FitZDT2<Params>, Params> phen_t;
  typedef eval::Parallel<Params> eval_t;
  typedef boost::fusion::vector<stat::ParetoFront<phen_t, Params> >  stat_t;
  typedef modif::Dummy<> modifier_t;
  typedef ea::EpsMOEA<phen_t, eval_t, stat_t, modifier_t, Params> ea_t;

  const size_t N = 20;
  size_t errors = 0;
  for(size_t i=0;i<N;i++)
  {
    ea_t ea;

    ea.run();

    ea.stat<0>().show_all(std::cout, 0);
    if(ea.stat<0>().pareto_front().size() < 100)
      errors++;
    std::cout<<"elite size :"<<ea.stat<0>().pareto_front().size()<<std::endl;

    BOOST_FOREACH(boost::shared_ptr<phen_t> p, ea.stat<0>().pareto_front()) {
      if(_g(*p) >= 1.1)
        errors++;
    }
  }

  BOOST_CHECK(double(errors)/double(N) <= 0.3);

}
