// Copyright (c) 1997, 2012, 2019 INRIA Sophia-Antipolis (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.0.1/Triangulation_on_sphere_2/include/CGAL/Triangulation_on_sphere_face_base_2.h $
// $Id: include/CGAL/Triangulation_on_sphere_face_base_2.h 50cfbde3b84 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
// Author(s)     : Mariette Yvinec,
//                 Claudia Werner
//                 Mael Rouxel-Labbé

#ifndef CGAL_TRIANGULATION_ON_SPHERE_FACE_BASE_2_H
#define CGAL_TRIANGULATION_ON_SPHERE_FACE_BASE_2_H

#include <CGAL/license/Triangulation_on_sphere_2.h>

#include <CGAL/Triangulation_ds_face_base_2.h>

namespace CGAL {

template <typename Gt,
          typename Fb = Triangulation_ds_face_base_2<> >
class Triangulation_on_sphere_face_base_2
    : public Fb
{
public:
  typedef Gt                                                  Geom_traits;
  typedef typename Fb::Vertex_handle                          Vertex_handle;
  typedef typename Fb::Face_handle                            Face_handle;

  template < typename TDS2 >
  struct Rebind_TDS {
    typedef typename Fb::template Rebind_TDS<TDS2>::Other     Fb2;
    typedef Triangulation_on_sphere_face_base_2<Gt, Fb2>      Other;
  };

public:
  void set_ghost(const bool b) { _ghost_flag = b; }
  bool is_ghost() const { return _ghost_flag; }

public:
  Triangulation_on_sphere_face_base_2()
    : Fb(), _ghost_flag(false)
  { }

  Triangulation_on_sphere_face_base_2(Vertex_handle v0,
                                      Vertex_handle v1,
                                      Vertex_handle v2)
    : Fb(v0, v1, v2), _ghost_flag(false)
  { }

  Triangulation_on_sphere_face_base_2(Vertex_handle v0,
                                      Vertex_handle v1,
                                      Vertex_handle v2,
                                      Face_handle n0,
                                      Face_handle n1,
                                      Face_handle n2)
    : Fb(v0, v1, v2, n0, n1, n2), _ghost_flag(false)
  { }

protected:
  bool _ghost_flag;
};

template < class Gt, class Fb >
std::ostream&
operator<<(std::ostream &os, const Triangulation_on_sphere_face_base_2<Gt, Fb> &f)
{
  // non combinatorial information. Default = point
    os << static_cast<const Fb&>(f);
    os << (f.is_ghost() ? " 1" : " 0");
    return os;
}

template < class Gt, class Fb >
std::istream&
operator>>(std::istream &is, Triangulation_on_sphere_face_base_2<Gt, Fb> &f)
{
  int g = -1;
  is >>  static_cast<Fb&>(f);
  is >> g;
  f.set_ghost(g == 1);
  return is;
}

} // namespace CGAL

#endif //CGAL_TRIANGULATION_ON_SPHERE_FACE_BASE_2_H

