"""Util functions for translations."""

import gettext
from functools import cache

from notifications_delivery import config
from notifications_delivery.connectors import loggly

logger = loggly.get_current_logger()


@cache
def get_translations(locale: str):
    """Load translations. Result is cached."""
    if locale == config.I18N_DEFAULT_LOCALE:
        # we have no translations for 'en'
        return gettext.NullTranslations()

    try:
        translations = gettext.translation(
            domain=config.I18N_DOMAIN,
            localedir=config.I18N_FOLDER_NAME,
            languages=[locale]
        )
    except OSError:
        logger.error(f"Can't find translations for locale {locale}. "
                     f"Falling back to '{config.I18N_DEFAULT_LOCALE}'",
                     exc_info=True)
        translations = gettext.NullTranslations()

    return translations