#include <base/subface.hpp>
#include "math/math_defs.hpp"

namespace internal
{
#define def_subface_func_list(func_name)                                                                                    \
    static constexpr std::array<func_name##_ptr_t, static_cast<uint8_t>(surface_type::max_count)> func_name##_func_list = { \
        &plane_function_impl::func_name,                                                                                    \
        &sphere_function_impl::func_name,                                                                                   \
        &cylinder_function_impl::func_name,                                                                                 \
        nullptr}

def_subface_func_list(eval_sdf);
def_subface_func_list(eval_sdf_grad);
def_subface_func_list(map_param_to_point);
def_subface_func_list(map_point_to_param);
def_subface_func_list(eval_du_constraint);
def_subface_func_list(eval_dv_constraint);
def_subface_func_list(eval_intersection);

#undef def_subface_func_list

#define def_export_get_function_ptr_impl(func_name)                                            \
    PE_API func_name##_ptr_t get_##func_name##_ptr(surface_type type)                          \
    {                                                                                          \
        return func_name##_func_list[static_cast<std::underlying_type_t<surface_type>>(type)]; \
    }

def_export_get_function_ptr_impl(eval_sdf);
def_export_get_function_ptr_impl(eval_sdf_grad);
def_export_get_function_ptr_impl(map_param_to_point);
def_export_get_function_ptr_impl(map_point_to_param);
def_export_get_function_ptr_impl(eval_du_constraint);
def_export_get_function_ptr_impl(eval_dv_constraint);
def_export_get_function_ptr_impl(eval_intersection);

#undef def_export_get_function_ptr_impl

PE_API double get_cycle(surface_type type)
{
    switch (type) {
        case surface_type::sphere:   return two_pi;
        case surface_type::cylinder: return two_pi;
        case surface_type::cone:     return sqrt_2 * pi;
        default:                     return std::numeric_limits<double>::infinity();
    }
}
} // namespace internal