/* SPDX-License-Identifier: BSD-2-Clause
 *
 * This file is part of pyosmium. (https://osmcode.org/pyosmium/)
 *
 * Copyright (C) 2025 Sarah Hoffmann <lonvia@denofr.de> and others.
 * For a full list of authors see the git log.
 */
#include <pybind11/pybind11.h>

#include <osmium/geom/mercator_projection.hpp>
#include <osmium/geom/coordinates.hpp>
#include <osmium/geom/haversine.hpp>
#include <osmium/geom/factory.hpp>
#include <osmium/geom/wkb.hpp>
#include <osmium/geom/wkt.hpp>
#include <osmium/geom/geojson.hpp>

#include "cast.h"
#include "osm_base_objects.h"

namespace py = pybind11;
namespace og = osmium::geom;

namespace {

struct WKBFactory : osmium::geom::WKBFactory<>
{
public:
    WKBFactory()
    : og::WKBFactory<>(og::wkb_type::wkb, og::out_type::hex)
    {}
};

using WKTFactory = og::WKTFactory<>;
using GeoJSONFactory = og::GeoJSONFactory<>;

template <typename Factory>
void make_factory_class(py::module_ &m, char const *name)
{
    py::class_<Factory>(m, name)
        .def(py::init<>())
        .def_property_readonly("epsg", &Factory::epsg)
        .def_property_readonly("proj_string", &Factory::proj_string)
        .def("create_point",
             [](Factory &f, py::object const &o) {
                 if (py::isinstance<osmium::Location>(o)) {
                    return f.create_point(o.cast<osmium::Location const &>());
                 }
                 auto const *node = pyosmium::try_cast<pyosmium::COSMNode>(o);
                 if (node) {
                    return f.create_point(*node->get());
                 }

                 return f.create_point(o.attr("location").cast<osmium::Location const &>());
             },
             py::arg("pt"))
        .def("create_linestring",
             [](Factory &f, py::object const &o, og::use_nodes un, og::direction dir) {
                 auto const *way = pyosmium::try_cast<pyosmium::COSMWay>(o);
                 if (way) {
                    return f.create_linestring(*way->get(), un, dir);
                 }

                 return f.create_linestring(pyosmium::cast_list<osmium::WayNodeList>(o), un, dir);
             },
             py::arg("list"), py::arg("use_nodes")=og::use_nodes::unique,
             py::arg("direction")=og::direction::forward)
        .def("create_multipolygon",
             [](Factory &f, py::object const &o) {
                 return f.create_multipolygon(*pyosmium::cast<pyosmium::COSMArea>(o).get());
             },
             py::arg("area"))
    ;
}

} // namespace

#ifdef Py_GIL_DISABLED
PYBIND11_MODULE(geom, m, py::mod_gil_not_used())
#else
PYBIND11_MODULE(geom, m)
#endif
{
    py::enum_<og::use_nodes>(m, "use_nodes")
        .value("UNIQUE", og::use_nodes::unique)
        .value("ALL", og::use_nodes::all)
        .export_values()
    ;

    py::enum_<og::direction>(m, "direction")
        .value("BACKWARD", og::direction::backward)
        .value("FORWARD", og::direction::forward)
        .export_values()
    ;

    py::class_<osmium::geom::Coordinates>(m, "Coordinates")
        .def(py::init<>())
        .def(py::init<double, double>())
        .def(py::init<osmium::Location const &>())
        .def_readonly("x", &osmium::geom::Coordinates::x)
        .def_readonly("y", &osmium::geom::Coordinates::y)
        .def("valid", &osmium::geom::Coordinates::valid)
    ;

    m.def("haversine_distance",
          [](py::object const &o) { return og::haversine::distance(pyosmium::cast_list<osmium::WayNodeList>(o)); },
          py::arg("list"));

    m.def("haversine_distance",
          static_cast<double (*)(og::Coordinates const &, og::Coordinates const &)>(&og::haversine::distance));
    m.def("haversine_distance",
          [](osmium::Location const &l1, osmium::Location const &l2) {
            return og::haversine::distance(og::Coordinates(l1), og::Coordinates(l2));
          });

    m.def("lonlat_to_mercator", &og::lonlat_to_mercator);

    m.def("mercator_to_lonlat", &og::mercator_to_lonlat);

    make_factory_class<WKBFactory>(m, "WKBFactory");

    make_factory_class<WKTFactory>(m, "WKTFactory");

    make_factory_class<GeoJSONFactory>(m, "GeoJSONFactory");
}
