// Boost.Geometry (aka GGL, Generic Geometry Library)

// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.

// Use, modification and distribution is subject to 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_GEOMETRY_PROJECTIONS_IMPL_BASE_STATIC_HPP
#define BOOST_GEOMETRY_PROJECTIONS_IMPL_BASE_STATIC_HPP

#if defined(_MSC_VER)
// For CRTP, *this is acceptable in constructor -> turn warning off
#pragma warning( disable : 4355 )
#endif // defined(_MSC_VER)


#include <string>

#include <boost/geometry/extensions/gis/projections/impl/pj_fwd.hpp>
#include <boost/geometry/extensions/gis/projections/impl/pj_inv.hpp>

namespace boost { namespace geometry { namespace projections
{


#ifndef DOXYGEN_NO_DETAIL
namespace detail
{

// Base-template-forward
template <typename Prj, typename LL, typename XY, typename P>
struct base_t_f
{
public:

    typedef LL geographic_point_type; ///< latlong point type
    typedef XY cartesian_point_type;  ///< xy point type

    inline base_t_f(Prj const& prj, P const& params)
        : m_par(params), m_prj(prj)
    {}

    inline P params() const {return m_par;}

    inline bool forward(LL const& lp, XY& xy) const
    {
        try
        {
            pj_fwd(m_prj, m_par, lp, xy);
            return true;
        }
        catch(...)
        {
            return false;
        }
    }

    inline std::string name() const
    {
        return this->m_par.name;
    }

protected:

    // Some projections do not work with float -> wrong results
    // TODO: make traits which select <double> from int/float/double and else selects T

    //typedef typename geometry::coordinate_type<LL>::type LL_T;
    //typedef typename geometry::coordinate_type<XY>::type XY_T;
    typedef double LL_T;
    typedef double XY_T;

    P m_par;
    const Prj& m_prj;
};

// Base-template-forward/inverse
template <typename Prj, typename LL, typename XY, typename P>
struct base_t_fi : public base_t_f<Prj, LL, XY, P>
{
public :
    inline base_t_fi(Prj const& prj, P const& params)
        : base_t_f<Prj, LL, XY, P>(prj, params)
    {}

    inline bool inverse(XY const& xy, LL& lp) const
    {
        try
        {
            pj_inv(this->m_prj, this->m_par, xy, lp);
            return true;
        }
        catch(...)
        {
            return false;
        }
    }
};

} // namespace detail
#endif // DOXYGEN_NO_DETAIL


}}} // namespace boost::geometry::projections


#endif // BOOST_GEOMETRY_PROJECTIONS_IMPL_BASE_STATIC_HPP
