import { timeLocaleMap } from './timeLocaleMap';

/**
 * Logs an i18n message to the console.
 * @param message - The message to log.
 *
 * TODO - Replace this logging method when the new logger is created
 */
export function i18nLog(message: string) {
  // eslint:disable: no-console
  // eslint-disable-next-line no-console
  (window?.log?.error ?? console.log)(`i18n: ${message}`);
}

export type Locale = keyof typeof timeLocaleMap;

export function getTimeLocaleDictionary() {
  return timeLocaleMap[getLocale()];
}

/**
 * Returns the current locale.
 */
export function getLocale(): Locale {
  if (!initialLocale) {
    i18nLog(`getLocale: using initialLocale: ${initialLocale}`);

    throw new Error('initialLocale is unset');
  }
  return initialLocale;
}

/**
 * Returns the closest supported locale by the browser.
 */
export function getBrowserLocale() {
  const userLocaleDashed = getLocale();

  const matchinglocales = Intl.DateTimeFormat.supportedLocalesOf(userLocaleDashed);

  if (matchinglocales.length) {
    return matchinglocales[0];
  }

  return 'en';
}

let initialLocale: Locale | undefined;

export function setInitialLocale(locale: Locale) {
  initialLocale = locale;
}