/* 愈心谷共享壳 —— 底栏注入、高亮、二级返回 */
(function () {
  var body = document.body;
  if (!body) return;

  var navKey = body.getAttribute('data-nav') || 'none';
  var backTo = body.getAttribute('data-back') || '';
  var pageTitle = body.getAttribute('data-title') || document.title || '';
  var base = body.getAttribute('data-base') || '';

  // 根据当前路径推断资源根：根目录页用 ''，pages/ 下用 '../'
  if (!base) {
    base = /\/pages\//.test(location.pathname) ? '../' : '';
  }

  body.classList.add('app-body');
  if (navKey === 'none') body.classList.add('no-nav');

  function abs(path) {
    if (!path) return base;
    if (/^(https?:|mailto:|tel:|#)/.test(path)) return path;
    return base + path.replace(/^\.\//, '');
  }

  // 二级顶栏
  if (navKey === 'none' && (backTo || pageTitle)) {
    var top = document.createElement('div');
    top.className = 'app-topbar';
    var backHref = abs(backTo || 'yuxingu.html');
    top.innerHTML =
      '<a class="back" href="' + backHref + '" aria-label="返回">←</a>' +
      '<div class="title"></div>';
    top.querySelector('.title').textContent = pageTitle;
    body.insertBefore(top, body.firstChild);
  }

  // 一级底栏
  if (navKey !== 'none') {
    var items = [
      { key: 'home', href: 'yuxingu.html', icon: '⌂', label: '首页' },
      { key: 'know', href: 'pages/know.html', icon: '◉', label: '认识自己' },
      { key: 'scales', href: 'pages/scales.html', icon: '☰', label: '专业测评' },
      { key: 'activity', href: 'pages/activity.html', icon: '✦', label: '私域活动' },
      { key: 'health', href: 'pages/health.html', icon: '♡', label: '健康管理' },
      { key: 'mine', href: 'pages/mine.html', icon: '◍', label: '我的' }
    ];
    var nav = document.createElement('nav');
    nav.className = 'app-nav';
    nav.setAttribute('aria-label', '主导航');
    nav.innerHTML = items.map(function (it) {
      var cls = it.key === navKey ? ' active' : '';
      return (
        '<a href="' + abs(it.href) + '" class="' + cls.trim() + '">' +
        '<span class="ni">' + it.icon + '</span>' + it.label +
        '</a>'
      );
    }).join('');
    body.appendChild(nav);
  }
})();