(function () {
  'use strict';

  const TOKEN_ADMIN = 'engeradios_admin_token';
  const TOKEN_LEGACY = 'access_token';

  function getToken() {
    const adminToken = localStorage.getItem(TOKEN_ADMIN);
    const legacyToken = localStorage.getItem(TOKEN_LEGACY);
    const token = adminToken || legacyToken || '';

    if (token) {
      if (!adminToken) localStorage.setItem(TOKEN_ADMIN, token);
      if (!legacyToken) localStorage.setItem(TOKEN_LEGACY, token);
    }

    return token;
  }

  function setToken(token) {
    if (!token) return;
    localStorage.setItem(TOKEN_ADMIN, token);
    localStorage.setItem(TOKEN_LEGACY, token);
  }

  function clearToken() {
    localStorage.removeItem(TOKEN_ADMIN);
    localStorage.removeItem(TOKEN_LEGACY);
  }

  function authHeaders(extraHeaders) {
    const token = getToken();
    return Object.assign(
      token ? { Authorization: `Bearer ${token}` } : {},
      extraHeaders || {}
    );
  }

  function formatDate(value) {
    if (!value) return '';
    const date = new Date(value);
    if (Number.isNaN(date.getTime())) return String(value);
    return date.toLocaleDateString('pt-BR');
  }

  function escapeHTML(value) {
    return String(value ?? '')
      .replaceAll('&', '&')
      .replaceAll('<', '&lt;')
      .replaceAll('>', '&gt;')
      .replaceAll('"', '&quot;')
      .replaceAll("'", '&#039;');
  }

  function setText(selectorOrElement, value) {
    const el = typeof selectorOrElement === 'string'
      ? document.querySelector(selectorOrElement)
      : selectorOrElement;

    if (el) el.textContent = value ?? '';
  }

  function clearElement(selectorOrElement) {
    const el = typeof selectorOrElement === 'string'
      ? document.querySelector(selectorOrElement)
      : selectorOrElement;

    if (el) el.replaceChildren();
  }

  window.EngeradiosAuth = {
    TOKEN_ADMIN,
    TOKEN_LEGACY,
    getToken,
    setToken,
    clearToken,
    authHeaders,
    formatDate,
    escapeHTML,
    setText,
    clearElement
  };
})();