import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';

import en from './locales/en.json';
import ru from './locales/ru.json';

export const defaultNS = 'translation';
export const supportedLanguages = ['ru', 'en'] as const;
export type SupportedLanguage = (typeof supportedLanguages)[number];

const storedLanguage =
  typeof window === 'undefined' ? null : window.localStorage.getItem('glchat.language');

const initialLanguage: SupportedLanguage =
  storedLanguage === 'en' || storedLanguage === 'ru' ? storedLanguage : 'ru';

void i18n.use(initReactI18next).init({
  resources: {
    ru: { translation: ru },
    en: { translation: en },
  },
  lng: initialLanguage,
  fallbackLng: 'ru',
  interpolation: { escapeValue: false },
  returnNull: false,
});

export default i18n;