#ifndef INCLUDE_NCURSES_ENUMS_HPP_
#define INCLUDE_NCURSES_ENUMS_HPP_

extern "C" {
#include <ncurses.h>
}

#include <ncurses/utils/macros.hpp>

namespace NCURSES_CPP_NAMESPACE {

struct ok_type {
  NCURSES_CPP_CONSTEXPR_INLINE operator bool() const { return true; }
};

NCURSES_CPP_CONSTEXPR_INLINE const ok_type ok;

struct err_type {
  NCURSES_CPP_CONSTEXPR_INLINE operator bool() const { return false; }
};

NCURSES_CPP_CONSTEXPR_INLINE const err_type err;

class result_type {
public:
  NCURSES_CPP_CONSTEXPR result_type(int code) noexcept
      : result_(code == OK ? true : false) {}

  NCURSES_CPP_CONSTEXPR_INLINE operator bool() const { return result_; }
  NCURSES_CPP_CONSTEXPR_INLINE bool operator==(const result_type &rhs) const {
    return result_ == rhs.result_;
  }
  NCURSES_CPP_CONSTEXPR_INLINE bool operator!=(const result_type &rhs) const {
    return result_ != rhs.result_;
  }
  NCURSES_CPP_CONSTEXPR_INLINE bool operator==(const ok_type &rhs) const {
    return result_;
  }
  NCURSES_CPP_CONSTEXPR_INLINE bool operator==(const err_type &rhs) const {
    return !result_;
  }

private:
  bool result_;
};

NCURSES_CPP_CONSTEXPR bool operator==(const ok_type &ok,
                                      const result_type &result) noexcept {
  return result == ok;
}

NCURSES_CPP_CONSTEXPR bool operator!=(const ok_type &ok,
                                      const result_type &result) noexcept {
  return result != ok;
}

NCURSES_CPP_CONSTEXPR bool operator==(const err_type &err,
                                      const result_type &result) noexcept {
  return result == err;
}

NCURSES_CPP_CONSTEXPR bool operator!=(const err_type &err,
                                      const result_type &result) noexcept {
  return result != err;
}

} // namespace NCURSES_CPP_NAMESPACE

#endif // INCLUDE_NCURSES_ENUMS_HPP_