// Browser-side translations. The server prints the catalog for the current
// language (translations/js.<locale>.yaml, via the vindn_i18n_json Twig
// function in base.html.twig) into window.VINDN_I18N; this module only looks
// things up. All visible text in public/js goes through t()/count() so a new
// language is a translations/ change, not a code change.
(function (window) {
  var data = window.VINDN_I18N || {};
  var locale = data.locale || 'de';
  var messages = data.messages || {};

  var numberFormats = {};
  var pluralRules;
  try {
    pluralRules = new Intl.PluralRules(locale);
  } catch (e) { /* unknown locale tag — fall back to "other" below */ }

  // "Hello %name%" + {name: 'x'} — same %placeholder% syntax as Symfony's
  // catalogs. An unknown key shows itself, which is visible but harmless.
  function t(key, params) {
    var text = Object.prototype.hasOwnProperty.call(messages, key) ? messages[key] : key;
    if (params) {
      Object.keys(params).forEach(function (name) {
        text = text.split('%' + name + '%').join(params[name]);
      });
    }
    return text;
  }

  // Number in the page language, at most `decimals` fraction digits.
  function number(value, decimals) {
    decimals = decimals || 0;
    if (!numberFormats[decimals]) {
      numberFormats[decimals] = new Intl.NumberFormat(locale, { maximumFractionDigits: decimals });
    }
    return numberFormats[decimals].format(value);
  }

  // Plural-aware message: looks up "<key>.<rule>" (one, other, few, …) for
  // the language's own plural rules, falling back to "<key>.other". The
  // count itself is available as %n%, already formatted.
  function count(key, n, params) {
    var rule = pluralRules ? pluralRules.select(n) : 'other';
    var full = key + '.' + rule;
    if (!Object.prototype.hasOwnProperty.call(messages, full)) full = key + '.other';
    return t(full, Object.assign({ n: number(n) }, params || {}));
  }

  window.VindnI18n = {
    locale: locale,
    dateFormat: data.dateFormat || 'd.m.Y',
    t: t,
    number: number,
    count: count
  };
})(window);