import { isElectronDevelopment } from '@/constants/isElectronDevelopment';
import i18next from 'i18next';
import Backend from 'i18next-fs-backend';
import path from 'path';

import { LOCALIZATION_FOLDER } from '@/constants/paths';
import { clearMainBindings, mainBindings } from './i18nMainBindings';
import changeToDefaultLanguage from './useDefaultLanguage';

/**
 * init i18n is async, but our usage is basically await the electron app to start, so this is basically ok
 * Don't forget `src/i18n.ts`
 */
export const i18n = i18next.use(Backend);

export async function initRendererI18NHandler(): Promise<void> {
  await i18n.init({
    backend: {
      loadPath: path.join(LOCALIZATION_FOLDER, 'locales/{{lng}}/{{ns}}.json'),
      addPath: path.join(LOCALIZATION_FOLDER, 'locales/{{lng}}/{{ns}}.missing.json'),
    },
    debug: false, // isElectronDevelopment,
    defaultNS: ['translation', 'agent'],
    interpolation: { escapeValue: false },
    saveMissing: false,
    // lng: 'zh_CN',
    fallbackLng: isElectronDevelopment ? false : 'en', // set to false when generating translation files locally
  });
  clearMainBindings();
  mainBindings();
  await changeToDefaultLanguage(i18next);
  await i18next.loadNamespaces('agent');
}