import fr from './locales/fr.json' assert { type: 'json' };
import en from './locales/en.json' assert { type: 'json' };

const LOCALES = { fr, en };
const SUPPORTED = Object.keys(LOCALES);
const STORAGE_KEY = 'cv_lang';

let currentLocale = localStorage.getItem(STORAGE_KEY) || 'fr';
if (!SUPPORTED.includes(currentLocale)) currentLocale = 'fr';

function resolve(obj, path) {
  return path.split('.').reduce((acc, key) => acc?.[key], obj);
}

export function t(key, params = {}) {
  const messages = LOCALES[currentLocale] ?? LOCALES.fr;
  let str = resolve(messages, key) ?? resolve(LOCALES.fr, key) ?? key;
  return str.replace(/\{(\w+)\}/g, (_, k) => params[k] ?? `{${k}}`);
}

export function getLocale() {
  return currentLocale;
}

export function setLocale(lang) {
  if (!SUPPORTED.includes(lang)) return;
  currentLocale = lang;
  localStorage.setItem(STORAGE_KEY, lang);
  document.documentElement.lang = lang;
  document.dispatchEvent(new CustomEvent('localechange', { detail: { lang } }));
}

export function getSupportedLocales() {
  return SUPPORTED;
}