// Copyright (c) 2007  GeometryFactory (France).  All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// 
//
// Author(s)     : Andreas Fabri, Fernando Cacciola


#ifndef CGAL_BOOST_GRAPH_BGL_PROPERTIES_H
#define CGAL_BOOST_GRAPH_BGL_PROPERTIES_H

#include <CGAL/property_map.h>
#include <boost/graph/properties.hpp>
#include <boost/graph/graph_traits.hpp>
#include <boost/foreach.hpp>

#include <CGAL/basic.h>
#include <string>

/// Boost Namespace
namespace boost {

/// \ingroup PkgBGLProperties
/// @{

/// A property tag which refers to the geometric embedding property
/// of a vertex of a \ref HalfedgeGraph.
enum vertex_point_t          { vertex_point          };
enum vertex_external_index_t { vertex_external_index } ;

/// A property tag which refers to the property
/// of a halfedge of being a border halfedge.
enum edge_external_index_t   { edge_external_index   } ;

/// A property tag which identifies the *index* property of
/// a halfedge of a \ref HalfedgeGraph.
enum halfedge_index_t        { halfedge_index        };
enum halfedge_external_index_t   { halfedge_external_index   } ;

/// A property tag which identifies the *index* property of
/// a face of a \ref FaceGraph.
enum face_index_t            { face_index            };
enum face_external_index_t   { face_external_index   } ;

  template <typename T>
  struct vertex_property_t
  {
    vertex_property_t(const std::string s, const T& t = T())
      : s(s), t(t)
    {}
    std::string s;
    T t;
  };

template<typename Graph, typename PropertyTag>
struct graph_has_property : CGAL::Tag_false {};
  
struct cgal_no_property
{
  typedef bool type;
  typedef const bool const_type;
};

/// @}

// Introduce those two tags so we can use BOOST_INSTALL_PROPERTY
// macro. This is dangerous because we now rely on implementation
// details.
struct halfedge_property_tag { };
struct face_property_tag { };

BOOST_INSTALL_PROPERTY(vertex, point);
BOOST_INSTALL_PROPERTY(vertex, external_index);
BOOST_INSTALL_PROPERTY(halfedge, external_index);
BOOST_INSTALL_PROPERTY(edge, external_index);
BOOST_INSTALL_PROPERTY(face, index);
BOOST_INSTALL_PROPERTY(face, external_index);
} // boost

namespace CGAL {
using boost::vertex_point_t;
using boost::vertex_point;
using boost::vertex_external_index_t;
using boost::vertex_external_index;
using boost::halfedge_index_t;
using boost::halfedge_index;
using boost::halfedge_external_index_t;
using boost::halfedge_external_index;
using boost::edge_external_index_t;
using boost::edge_external_index;
using boost::face_index_t;
using boost::face_index;
using boost::face_external_index_t;
using boost::face_external_index;
using boost::vertex_property_t;
} // CGAL

namespace CGAL{
namespace helpers {

// matches read-write property maps
template <class PolygonMesh, class FaceIndexMap, class Tag>
void init_face_indices(PolygonMesh& pm,
                       FaceIndexMap& fid,
                       boost::read_write_property_map_tag,
                       Tag)
{
  typename boost::property_traits<FaceIndexMap>::value_type i = 0;
  BOOST_FOREACH(typename boost::graph_traits<PolygonMesh>::face_descriptor fd,
                faces(pm))
  {
    put(fid, fd, i);
    ++i;
  }
}
template <class PolygonMesh, class VertexIndexMap, class Tag>
void init_vertex_indices(PolygonMesh& pm,
                         VertexIndexMap& vid,
                         boost::read_write_property_map_tag,
                         Tag)
{
  typename boost::property_traits<VertexIndexMap>::value_type i = 0;
  BOOST_FOREACH(typename boost::graph_traits<PolygonMesh>::vertex_descriptor vd,
                vertices(pm))
  {
    put(vid, vd, i);
    ++i;
  }
}
template <class PolygonMesh, class HalfedgeIndexMap, class Tag>
void init_halfedge_indices(PolygonMesh& pm,
                           HalfedgeIndexMap& hid,
                           boost::read_write_property_map_tag,
                           Tag)
{
  typename boost::property_traits<HalfedgeIndexMap>::value_type i = 0;
  BOOST_FOREACH(typename boost::graph_traits<PolygonMesh>::halfedge_descriptor hd,
                halfedges(pm))
  {
    put(hid, hd, i);
    ++i;
  }
}

// matches mutable Lvalue property maps
template <class PolygonMesh, class FaceIndexMap>
void init_face_indices(PolygonMesh& pm,
                       FaceIndexMap& fid,
                       boost::lvalue_property_map_tag,
                       boost::false_type)
{
  init_face_indices(pm, fid,
    boost::read_write_property_map_tag(), boost::false_type());
}
template <class PolygonMesh, class VertexIndexMap>
void init_vertex_indices(PolygonMesh& pm,
                         VertexIndexMap& vid,
                         boost::lvalue_property_map_tag,
                         boost::false_type)
{
  init_vertex_indices(pm, vid,
    boost::read_write_property_map_tag(), boost::false_type());
}
template <class PolygonMesh, class HalfedgeIndexMap>
void init_halfedge_indices(PolygonMesh& pm,
                         HalfedgeIndexMap& hid,
                         boost::lvalue_property_map_tag,
                         boost::false_type)
{
  init_halfedge_indices(pm, hid,
    boost::read_write_property_map_tag(), boost::false_type());
}

// matches all other types of property map
template <class PolygonMesh, class FaceIndexMap, class MapTag, class Tag>
void init_face_indices(PolygonMesh&, FaceIndexMap, MapTag, Tag)
{}
template <class PolygonMesh, class VertexIndexMap, class MapTag, class Tag>
void init_vertex_indices(PolygonMesh&, VertexIndexMap, MapTag, Tag)
{}
template <class PolygonMesh, class HalfedgeIndexMap, class MapTag, class Tag>
void init_halfedge_indices(PolygonMesh&, HalfedgeIndexMap, MapTag, Tag)
{}

template <class PolygonMesh, class FaceIndexMap>
void init_face_indices(PolygonMesh& pm, FaceIndexMap fid)
{
  init_face_indices(pm, fid,
                    typename boost::property_traits<FaceIndexMap>::category(),
                    typename boost::is_const<
                      typename boost::remove_reference<
                        typename boost::property_traits<FaceIndexMap>::reference
                            >::type >::type() );
}

template <class PolygonMesh, class VertexIndexMap>
void init_vertex_indices(PolygonMesh& pm, VertexIndexMap vid)
{
  init_vertex_indices(pm, vid,
                      typename boost::property_traits<VertexIndexMap>::category(),
                      typename boost::is_const<
                        typename boost::remove_reference<
                          typename boost::property_traits<VertexIndexMap>::reference
                            >::type >::type() );
}

template <class PolygonMesh, class HalfedgeIndexMap>
void init_halfedge_indices(PolygonMesh& pm, HalfedgeIndexMap hid)
{
  init_halfedge_indices(pm, hid,
                        typename boost::property_traits<HalfedgeIndexMap>::category(),
                        typename boost::is_const<
                          typename boost::remove_reference<
                            typename boost::property_traits<HalfedgeIndexMap>::reference
                              >::type >::type() );
}

} } //end of namespace CGAL::helpers


#endif // CGAL_BOOST_GRAPH_BGL_PROPERTIES_H