import type { Locale } from '@intlify/core-base';

export const useI18nKey = () => {
  const { locale, locales } = useI18n();

  function tKey<K extends string>(
    obj: Record<`${K}_${Locale}`, string>,
    key: K
  ) {
    return computed(() => obj[`${key}_${locale.value}`]);
  }

  function tSluggy(
    obj: { id: number | string } & (
      | Record<`name_${Locale}`, string | null | undefined>
      | Record<`title_${Locale}`, string | null | undefined>
    )
  ) {
    return computed(() =>
      sluggy({
        id: obj.id,
        title: hasKey(obj, 'title') ? tKey(obj, 'title').value : undefined,
        name: hasKey(obj, 'name') ? tKey(obj, 'name').value : undefined
      })
    );
  }

  function hasKey<K extends string>(
    obj:
      | Record<`${K}_${Locale}`, string | null | undefined>
      | null
      | undefined
      | {},
    key: K
  ): obj is Record<`${K}_${Locale}`, string> {
    return (
      !!obj &&
      locales.value.every(
        (l) =>
          typeof obj === 'object' &&
          Object.prototype.hasOwnProperty.call(obj, `${key}_${l.code}`) &&
          // @ts-expect-error this is a type check
          typeof obj[`${key}_${l.code}`] === 'string' &&
          // @ts-expect-error this is a type check
          obj[`${key}_${l.code}`]
      )
    );
  }

  return { tKey, hasKey, tSluggy };
};