// Copyright (c) 1997  ETH Zurich (Switzerland).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL$
// $Id$
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s)     : Lutz Kettner  <kettner@mpi-sb.mpg.de>

#ifndef CGAL_IO_POLYHEDRON_OFF_IOSTREAM_H
#define CGAL_IO_POLYHEDRON_OFF_IOSTREAM_H

#include <CGAL/license/Polyhedron.h>

#include <CGAL/Polyhedron_3.h>

#include <CGAL/IO/print_OFF.h>
#include <CGAL/IO/scan_OFF.h>

#include <CGAL/boost/graph/named_params_helper.h>
#include <CGAL/boost/graph/Named_function_parameters.h>

#include <iostream>

namespace CGAL {

template < class Traits,
           class Items,
           template < class T, class I, class A> class HDS,
           class Alloc, class CGAL_BGL_NP_TEMPLATE_PARAMETERS>
bool write_OFF(std::ostream& out,
               const Polyhedron_3<Traits, Items, HDS, Alloc>& P,
               const CGAL_BGL_NP_CLASS& np)
{
  using parameters::choose_parameter;
  using parameters::get_parameter;

  // writes P to `out' in PRETTY, ASCII or BINARY format as the stream indicates.
  File_header_OFF header(is_binary(out), ! is_pretty(out), false);
  typename CGAL::GetVertexPointMap<Polyhedron_3<Traits, Items, HDS, Alloc>, CGAL_BGL_NP_CLASS>::const_type
      vpm = choose_parameter(get_parameter(np, internal_np::vertex_point),
                             get_const_property_map(CGAL::vertex_point, P));

  return CGAL::print_polyhedron_with_header_OFF(out, P, header, vpm);
}

template <class Traits,
          class Items,
          template < class T, class I, class A> class HDS,
          class Alloc>
bool write_OFF(std::ostream& out, const Polyhedron_3<Traits, Items, HDS, Alloc>& P)
{
  return write_OFF(out, P, parameters::all_default());
}

template <class Traits,
          class Items,
          template < class T, class I, class A> class HDS,
          class Alloc, class CGAL_BGL_NP_TEMPLATE_PARAMETERS>
bool read_OFF(std::istream& in,
              Polyhedron_3<Traits, Items, HDS, Alloc>& P,
              const CGAL_BGL_NP_CLASS& np, bool verbose = true)
{
  // reads a polyhedron from `in' and appends it to P.
  typedef typename CGAL::GetVertexPointMap<Polyhedron_3<Traits, Items, HDS, Alloc>, CGAL_BGL_NP_CLASS>::type VPM;

  using parameters::choose_parameter;
  using parameters::get_parameter;

  CGAL::scan_OFF(in, P, verbose);

  if(!parameters::is_default_parameter(get_parameter(np, internal_np::vertex_point)))
  {
    typedef typename boost::graph_traits<Polyhedron_3<Traits, Items, HDS, Alloc> >::vertex_descriptor Vertex;

    typename property_map_selector<Polyhedron_3<Traits, Items, HDS, Alloc>, boost::vertex_point_t>::type
        def_vpm = get_property_map(CGAL::vertex_point, P);
    VPM vpm = choose_parameter(get_parameter(np, internal_np::vertex_point),
                               get_property_map(CGAL::vertex_point, P));

    for(Vertex v : vertices(P))
      put(vpm, v, get(def_vpm, v));
  }

  return !in.fail();
}

template <class Traits,
          class Items,
          template < class T, class I, class A> class HDS,
          class Alloc>
bool read_OFF(std::istream& in, Polyhedron_3<Traits, Items, HDS, Alloc>& P)
{
  return read_OFF(in, P, parameters::all_default());
}

template <class Traits,
          class Items,
          template < class T, class I, class A>
          class HDS, class Alloc>
std::ostream& operator<<(std::ostream& out, const Polyhedron_3<Traits, Items, HDS, Alloc>& P)
{
  write_OFF(out, P);
  return out;
}

template <class Traits,
          class Items,
          template < class T, class I, class A> class HDS,
          class Alloc>
std::istream& operator>>(std::istream& in, Polyhedron_3<Traits, Items, HDS, Alloc>& P)
{
  read_OFF(in, P);
  return in;
}

} // namespace CGAL

#endif // CGAL_IO_POLYHEDRON_OFF_IOSTREAM_H