// Copyright (c) 2016-2018  INRIA Nancy (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1/Hyperbolic_triangulation_2/include/CGAL/Hyperbolic_triangulation_face_base_2.h $
// $Id: include/CGAL/Hyperbolic_triangulation_face_base_2.h b26b07a1242 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
// Author(s)     : Monique Teillaud <Monique.Teillaud@inria.fr>
//                 Mikhail Bogdanov

#ifndef CGAL_HYPERBOLIC_TRIANGULATION_FACE_BASE_2_H
#define CGAL_HYPERBOLIC_TRIANGULATION_FACE_BASE_2_H

#include <CGAL/license/Hyperbolic_triangulation_2.h>

#include <CGAL/basic.h>
#include <CGAL/Triangulation_ds_face_base_2.h>
#include <CGAL/Object.h>

namespace CGAL {

class Hyperbolic_data
{
  typedef std::int8_t Id;

private:
  // - 2 for infinite face
  // - 1 for finite, hyperbolic face
  //   0 for finite, non hyperbolic with non-hyperbolic edge at index 0
  //   2 for finite, non hyperbolic with non-hyperbolic edge at index 1
  //   1 for finite, non hyperbolic with non-hyperbolic edge at index 2
  Id _hyperbolic_tag;

public:
  Hyperbolic_data(Id id = -2) : _hyperbolic_tag(id) { }

  void set_infinite() { _hyperbolic_tag = -2; }

  // a finite face is non_hyperbolic if its circumscribing circle intersects the circle at infinity
  void set_Delaunay_hyperbolic() { _hyperbolic_tag = -1; }

  bool is_Delaunay_hyperbolic() const
  {
    return (_hyperbolic_tag == -1);
  }

  // set and get the non-hyperbolic property of the edge #i
  void set_Delaunay_non_hyperbolic(int i) { _hyperbolic_tag = i; }

  bool is_Delaunay_non_hyperbolic(int i) const
  {
    return (_hyperbolic_tag == i);
  }
};

template<typename Gt,
         typename Fb = Triangulation_ds_face_base_2<> >
class Hyperbolic_triangulation_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 Hyperbolic_triangulation_face_base_2<Gt, Fb2>   Other;
  };

public:
  Hyperbolic_triangulation_face_base_2() : Fb() {}

  Hyperbolic_triangulation_face_base_2(Vertex_handle v0,
                                       Vertex_handle v1,
                                       Vertex_handle v2)
    : Fb(v0, v1, v2)
  {}

  Hyperbolic_triangulation_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)
  {}

  static int ccw(int i) {return Triangulation_cw_ccw_2::ccw(i);}
  static int  cw(int i) {return Triangulation_cw_ccw_2::cw(i);}

  Hyperbolic_data& hyperbolic_data() { return this->_hyperbolic_data; }
  const Hyperbolic_data& hyperbolic_data() const { return this->_hyperbolic_data; }

private:
  Hyperbolic_data _hyperbolic_data;
};

} // namespace CGAL

#endif //CGAL_HYPERBOLIC_TRIANGULATION_FACE_BASE_2_H

