#ifndef RFL_FROM_NAMED_TUPLE_HPP_
#define RFL_FROM_NAMED_TUPLE_HPP_

#include <type_traits>

#include "internal/copy_from_named_tuple.hpp"
#include "internal/copy_from_tuple.hpp"
#include "internal/has_fields.hpp"
#include "internal/move_from_named_tuple.hpp"
#include "internal/move_from_tuple.hpp"
#include "named_tuple_t.hpp"

namespace rfl {

  /// Generates the struct T from a named tuple.
  template <class T, class NamedTupleType>
  auto from_named_tuple(NamedTupleType&& _n) {
    using RequiredType = std::remove_cvref_t<rfl::named_tuple_t<T>>;
    if constexpr (!std::is_same<
                      std::remove_cvref_t<NamedTupleType>, RequiredType>()) {
      return from_named_tuple<T>(RequiredType(std::forward<NamedTupleType>(_n))
      );
    } else if constexpr (internal::has_fields<T>()) {
      if constexpr (std::is_lvalue_reference<NamedTupleType> {}) {
        return internal::copy_from_named_tuple<T>(_n);
      } else {
        return internal::move_from_named_tuple<T>(_n);
      }
    } else {
      if constexpr (std::is_lvalue_reference<NamedTupleType> {}) {
        return internal::copy_from_tuple<T>(_n.values());
      } else {
        return internal::move_from_tuple<T>(std::move(_n.values()));
      }
    }
  }

  /// Generates the struct T from a named tuple.
  template <class T, class NamedTupleType>
  auto from_named_tuple(const NamedTupleType& _n) {
    using RequiredType = std::remove_cvref_t<rfl::named_tuple_t<T>>;
    if constexpr (!std::is_same<
                      std::remove_cvref_t<NamedTupleType>, RequiredType>()) {
      return from_named_tuple<T>(RequiredType(_n));
    } else if constexpr (internal::has_fields<T>()) {
      return internal::copy_from_named_tuple<T>(_n);
    } else {
      return internal::copy_from_tuple<T>(_n.values());
    }
  }

} // namespace rfl

#endif