#ifndef RFL_FIND_INDEX_HPP_
#define RFL_FIND_INDEX_HPP_

#include <tuple>
#include <type_traits>

#include "StringLiteral.hpp"

namespace rfl {
  namespace internal {

    /// Finds the index of the field signified by _field_name
    template <StringLiteral _field_name, class Fields, int I = 0>
    constexpr static int find_index() {
      using FieldType =
          std::remove_cvref_t<typename std::tuple_element<I, Fields>::type>;

      constexpr bool name_i_matches = (FieldType::name_ == _field_name);

      if constexpr (name_i_matches) {
        return I;
      } else {
        constexpr bool out_of_range = I + 1 == std::tuple_size_v<Fields>;

        static_assert(!out_of_range, "Field name not found!");

        if constexpr (out_of_range) {
          // This is to avoid very confusing error messages.
          return I;
        } else {
          return find_index<_field_name, Fields, I + 1>();
        }
      }
    }

  } // namespace internal
} // namespace rfl

#endif