// Copyright David Abrahams 2002.
// Copyright Stefan Seefeld 2016.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#ifndef boost_python_to_python_value_hpp_
#define boost_python_to_python_value_hpp_

#include 

#include 
#include 
#include 

#include 
#include 
#include 
#include 
#include 

#include 
#include 
#include 

#include 
#include 

namespace boost { namespace python { 

namespace detail
{
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES

template 
struct object_manager_get_pytype
{
   template 
   static PyTypeObject const* get( U& (*)() =0)
   {
      return converter::object_manager_traits::get_pytype();
   }
};

template 
struct object_manager_get_pytype
{
   template 
   static PyTypeObject const* get( U const& (*)() =0)
   {
      return converter::object_manager_traits::get_pytype();
   }
};

#endif

  template 
  struct object_manager_to_python_value
  {
      typedef typename value_arg::type argument_type;
    
      PyObject* operator()(argument_type) const;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
      typedef boost::mpl::bool_ is_t_handle;
      typedef boost::detail::indirect_traits::is_reference_to_const is_t_const;
      PyTypeObject const* get_pytype() const {
          return get_pytype_aux((is_t_handle*)0);
      }

      inline static PyTypeObject const* get_pytype_aux(mpl::true_*) {return converter::object_manager_traits::get_pytype();}
      
      inline static PyTypeObject const* get_pytype_aux(mpl::false_* ) 
      {
          return object_manager_get_pytype::get((T(*)())0);
      }
      
#endif 

      // This information helps make_getter() decide whether to try to
      // return an internal reference or not. I don't like it much,
      // but it will have to serve for now.
      BOOST_STATIC_CONSTANT(bool, uses_registry = false);
  };

  
  template 
  struct registry_to_python_value
  {
      typedef typename value_arg::type argument_type;
    
      PyObject* operator()(argument_type) const;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
      PyTypeObject const* get_pytype() const {return converter::registered::converters.to_python_target_type();}
#endif

      // This information helps make_getter() decide whether to try to
      // return an internal reference or not. I don't like it much,
      // but it will have to serve for now.
      BOOST_STATIC_CONSTANT(bool, uses_registry = true);
  };

  template 
  struct shared_ptr_to_python_value
  {
      typedef typename value_arg::type argument_type;
    
      PyObject* operator()(argument_type) const;
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
      PyTypeObject const* get_pytype() const {return get_pytype((boost::type*)0);}
#endif 
      // This information helps make_getter() decide whether to try to
      // return an internal reference or not. I don't like it much,
      // but it will have to serve for now.
      BOOST_STATIC_CONSTANT(bool, uses_registry = false);
  private:
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
    template 
    PyTypeObject const* get_pytype(boost::type *) const {return converter::registered::converters.to_python_target_type();}
    template 
    PyTypeObject const* get_pytype(boost::type *) const {return converter::registered::converters.to_python_target_type();}
# if !defined(BOOST_NO_CXX11_SMART_PTR)
    template 
    PyTypeObject const* get_pytype(boost::type *) const {return converter::registered::converters.to_python_target_type();}
    template 
    PyTypeObject const* get_pytype(boost::type *) const {return converter::registered::converters.to_python_target_type();}
# endif
#endif
  };
}

template 
struct to_python_value
    : mpl::if_<
          detail::value_is_shared_ptr
        , detail::shared_ptr_to_python_value
        , typename mpl::if_<
              mpl::or_<
                  converter::is_object_manager
                , converter::is_reference_to_object_manager
              >
            , detail::object_manager_to_python_value
            , detail::registry_to_python_value
          >::type
      >::type
{
};

//
// implementation 
//
namespace detail
{
  template 
  inline PyObject* registry_to_python_value::operator()(argument_type x) const
  {
      return converter::registered::converters.to_python(&x);
  }

  template 
  inline PyObject* object_manager_to_python_value::operator()(argument_type x) const
  {
      return python::upcast(
          python::xincref(
              get_managed_object(x, tag))
          );
  }

  template 
  inline PyObject* shared_ptr_to_python_value::operator()(argument_type x) const
  {
      return converter::shared_ptr_to_python(x);
  }
}

}} // namespace boost::python

#endif