/**
 *
 * @file     Adaptor.cpp
 *
 * @authors  M. Laporte, D. Mathieu
 *
 * @date     07/12/2011
 *
 * @version  V1.0
 *
 **/
#include <string>
#include <vector>
#include <algorithm>  // sort()
#include <iostream>
#include <functional>

using namespace std;

namespace
{
    template <typename T1, typename T2, typename TRes>
    class IBinaryFunction
    {
      public :
        typedef T1   first_argument_type;
        typedef T2   second_argument_type;
        typedef TRes result_type;

        virtual ~IBinaryFunction (void) {}
        virtual TRes operator () (const T1 &, const T2 &) const = 0;

    }; // IBinaryFunction

    class Pers
    {
        string   myNom;
        unsigned myAge;

      public :
        Pers (const string & Nom, unsigned Age)
            : myNom (Nom), myAge (Age) {}

        const string & getNom (void) const noexcept { return myNom; }
        unsigned       getAge (void) const noexcept { return myAge; }

    private :
        ostream & display (ostream & os)  const
        {
            return os << getAge () << " - " << getNom ();

        } // display()

      public :
        friend ostream & operator << (ostream & os, const Pers & p)
        {
            return p.display (os);

        }

    }; // Pers

    class TriParAgeAsc : public IBinaryFunction <Pers, Pers, bool>
    {
      public :
        virtual ~TriParAgeAsc (void) noexcept {}

        virtual bool operator () (const Pers & p1, const Pers & p2)
                        const noexcept
        {
            return p1.getAge () < p2.getAge ();

        } // operator ()

    }; // TriParAgeAsc

    class TriParNomDesc : public IBinaryFunction <Pers, Pers, bool>
    {
      public :
        virtual ~TriParNomDesc (void) noexcept {}

        virtual bool operator () (const Pers & p1, const Pers & p2)
                        const noexcept
        {
            return p1.getNom () > p2.getNom ();

        } // operator ()

    }; // TriParNomDesc

    void adaptor (void)
    {
        cout << "FunctorSort : \n";

        typedef vector <Pers> CVPers;

        CVPers vPers;

        vPers.push_back ( Pers ("Charlotte", 21));
        vPers.push_back ( Pers ("Alfred",    12));
        vPers.push_back ( Pers ("Jean",      42));
        vPers.push_back ( Pers ("Noemie",    11));
        vPers.push_back ( Pers ("Berthe",    99));
        vPers.push_back ( Pers ("Agathe",    29));
        vPers.push_back ( Pers ("Sylvain",   42));
        vPers.push_back ( Pers ("Pierre",    75));

        cout << "\nTri par age croissant\n\n";

        sort (vPers.begin (), vPers.end (), TriParAgeAsc ());

        for (const Pers & personne : vPers)
            cout << personne << '\n';

        cout << "\nTri par nom decroissant\n\n";

        sort (vPers.begin (), vPers.end (), TriParNomDesc ());

        for (const Pers & personne : vPers)
            cout << personne << '\n';
        cout << "\nRecherche de la premiere personne d'age <= 40 : ";

        CVPers::const_iterator pos = find_if (vPers.begin (), vPers.end (),
                                              bind2nd (TriParAgeAsc (), Pers (" ",40)));// a completer

        if (vPers.end () == pos)
            cout << "Aucun element correspondant\n";
        else
            cout << *pos << '\n';

        cout << "\nRecherche de la premiere personne d'age<= 4 : ";

        pos = find_if (vPers.begin (), vPers.end (),
                       bind2nd (TriParAgeAsc (), Pers (" ", 4)));// a completer

        if (vPers.end () == pos)
            cout << "Aucun element correspondant\n";
        else
            cout << *pos << '\n';
    } // adaptor()

} // namespace

int main (void)
{
    adaptor ();

    return 0;

} // main()