/* global preval */

import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';
import { i18nextCodes } from '@freecodecamp/shared/config/i18n';

import translations from './locales/english/translations.json';
import trending from './locales/english/trending.json';
import intro from './locales/english/intro.json';
import metaTags from './locales/english/meta-tags.json';
import links from './locales/english/links.json';
import searchBar from './locales/english/search-bar.json';

import envData from '../config/env.json';

const { clientLocale } = envData;

const i18nextCode = i18nextCodes[clientLocale];

// Non-english locale resources are loaded via preval so that webpack only
// bundles the single locale selected by CLIENT_LOCALE and the english fallback.
// For english the preval returns undefined, so webpack will not bundle the
// english resources twice.
i18n.use(initReactI18next).init({
  fallbackLng: 'en',
  lng: i18nextCode,
  resources: {
    [i18nextCode]: {
      translations: preval`
      const { clientLocale } = require('../config/env.json');
      if (clientLocale !== 'english') {
        module.exports = require('./locales/' + clientLocale + '/translations.json');
      }
    `,
      trending: preval`
      const { clientLocale } = require('../config/env.json');
      if (clientLocale !== 'english') {
        module.exports = require('./locales/' + clientLocale + '/trending.json');
      }
    `,
      intro: preval`
      const { clientLocale } = require('../config/env.json');
      if (clientLocale !== 'english') {
        module.exports = require('./locales/' + clientLocale + '/intro.json');
      }
    `,
      metaTags: preval`
      const { clientLocale } = require('../config/env.json');
      if (clientLocale !== 'english') {
        module.exports = require('./locales/' + clientLocale + '/meta-tags.json');
      }
    `,
      links: preval`
      const { clientLocale } = require('../config/env.json');
      if (clientLocale !== 'english') {
        module.exports = require('./locales/' + clientLocale + '/links.json');
      }
    `,
      'search-bar': preval`
      const { clientLocale } = require('../config/env.json');
      if (clientLocale !== 'english') {
        module.exports = require('./locales/' + clientLocale + '/search-bar.json');
      }
    `
    },
    en: {
      translations,
      trending,
      intro,
      metaTags,
      links,
      'search-bar': searchBar
    }
  },
  ns: ['translations', 'trending', 'intro', 'metaTags', 'links', 'search-bar'],
  defaultNS: 'translations',
  returnObjects: true,
  // Uncomment the next line for debug logging
  // debug: true,
  interpolation: {
    escapeValue: false
  },
  react: {
    useSuspense: true
  },
  returnNull: false
});

i18n.languages = clientLocale;

export default i18n;