/*
<moRandomBestHC.h>
Copyright (C) DOLPHIN Project-Team, INRIA Lille - Nord Europe, 2006-2010

Sebastien Verel, Arnaud Liefooghe, Jeremie Humeau

This software is governed by the CeCILL license under French law and
abiding by the rules of distribution of free software.  You can  ue,
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".

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ParadisEO WebSite : http://paradiseo.gforge.inria.fr
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*/

#ifndef _moRandomBestHC_h
#define _moRandomBestHC_h

#include <algo/moLocalSearch.h>
#include <explorer/moRandomBestHCexplorer.h>
#include <continuator/moTrueContinuator.h>
#include <eval/moEval.h>
#include <eoEvalFunc.h>

/**
 * Random Best HC:
 * Hill-Climbing local search
 *
 * At each iteration,
 *   one of the random best solution in the neighborhood is selected
 *   if the selected neighbor have higher fitness than the current solution
 *       then the solution is replaced by the selected neighbor
 *   the algorithm stops when there is no higher neighbor
 */
template<class Neighbor>
class moRandomBestHC: public moLocalSearch<Neighbor>
{
public:
    typedef typename Neighbor::EOT EOT;
    typedef moNeighborhood<Neighbor> Neighborhood ;

    /**
     * Basic constructor for a hill-climber
     * @param _neighborhood the neighborhood
     * @param _fullEval the full evaluation function
     * @param _eval neighbor's evaluation function
     */
    moRandomBestHC(Neighborhood& _neighborhood, eoEvalFunc<EOT>& _fullEval, moEval<Neighbor>& _eval):
            moLocalSearch<Neighbor>(explorer, trueCont, _fullEval),
            explorer(_neighborhood, _eval, defaultNeighborComp, defaultSolNeighborComp)
    {}

    /**
     * Simple constructor for a hill-climber
     * @param _neighborhood the neighborhood
     * @param _fullEval the full evaluation function
     * @param _eval neighbor's evaluation function
     * @param _cont an external continuator
     */
    moRandomBestHC(Neighborhood& _neighborhood, eoEvalFunc<EOT>& _fullEval, moEval<Neighbor>& _eval, moContinuator<Neighbor>& _cont):
            moLocalSearch<Neighbor>(explorer, _cont, _fullEval),
            explorer(_neighborhood, _eval, defaultNeighborComp, defaultSolNeighborComp)
    {}

    /**
     * General constructor for a hill-climber
     * @param _neighborhood the neighborhood
     * @param _fullEval the full evaluation function
     * @param _eval neighbor's evaluation function
     * @param _cont an external continuator
     * @param _compN  a neighbor vs neighbor comparator
     * @param _compSN a solution vs neighbor comparator
     */
    moRandomBestHC(Neighborhood& _neighborhood, eoEvalFunc<EOT>& _fullEval, moEval<Neighbor>& _eval, moContinuator<Neighbor>& _cont, moNeighborComparator<Neighbor>& _compN, moSolNeighborComparator<Neighbor>& _compSN):
            moLocalSearch<Neighbor>(explorer, _cont, _fullEval),
            explorer(_neighborhood, _eval, _compN, _compSN)
    {}

private:
    // always true continuator
    moTrueContinuator<Neighbor> trueCont;
    // compare the fitness values of neighbors
    moNeighborComparator<Neighbor> defaultNeighborComp;
    // compare the fitness values of the solution and the neighbor
    moSolNeighborComparator<Neighbor> defaultSolNeighborComp;
    // the explorer of the HC with random choice of the best solution
    moRandomBestHCexplorer<Neighbor> explorer;
};

#endif
