(() => {
  const auth = window.TrafficAuth;
  const current = auth.requireUser();
  if (!current) return;
  const templates = window.LINK_TEMPLATES;
  const historyStore = window.LinkHistoryStore;
  if (!templates?.length) return;

  const { convertTrackingLink } = window.TrackingLinkConverter;
  const $ = (id) => document.getElementById(id);
  const platformSelect = $('platformSelect');
  const macroBody = $('macroTableBody');
  const output = $('urlOutput');
  let activeResult = null;
  let inputTimer;

  $('currentUser').textContent = current.username;
  $('templateCount').textContent = `${templates.length} 个平台模板`;
  templates.forEach((template, index) => platformSelect.add(new Option(template.name, index)));

  const activeTemplate = () => templates[Number(platformSelect.value || 0)];

  function ensureSession() {
    const active = auth.currentUser();
    if (active?.username === current.username) return true;
    location.replace('login.html?next=link-generator.html');
    return false;
  }

  auth.watchSession(() => location.replace('login.html?next=link-generator.html'));

  function scopedHistoryCount() {
    const records = historyStore.list();
    return current.role === 'admin' ? records.length : records.filter((item) => item.username === current.username).length;
  }

  function updateHistoryCount() {
    $('historyCountBadge').textContent = scopedHistoryCount();
  }

  function renderPlatform() {
    const template = activeTemplate();
    const review = template.status.includes('待');
    $('platformStatus').innerHTML = `<span class="template-status ${review ? 'review' : ''}">${escapeHtml(template.status)}</span>`;
    $('macroReferenceTitle').textContent = `${template.name} 平台宏参考`;
    renderMacros();
    if ($('originalLink').value.trim()) convertFromInput(false);
  }

  function renderMacros() {
    const query = $('macroSearch').value.trim().toLowerCase();
    const allMacros = activeTemplate().macros;
    const rows = allMacros.filter(([macro, desc]) => `${macro} ${desc}`.toLowerCase().includes(query));
    $('macroCount').textContent = `${allMacros.length} 个可用宏 · 点击展开`;
    macroBody.innerHTML = rows.length ? rows.map(([macro, desc]) => `<tr><td><code>${escapeHtml(macro)}</code></td><td>${escapeHtml(desc)}</td></tr>`).join('') : '<tr><td colspan="2" class="table-empty">没有匹配的媒体宏</td></tr>';
  }

  function renderChanges(changes) {
    const rows = changes.length ? changes : [{ key:'—', from:'原链接参数无需变化', to:'—' }];
    $('mappingTableBody').innerHTML = rows.map((change) => `<tr><td><code>${escapeHtml(change.key)}</code></td><td><span class="old-param">${escapeHtml(change.from || '(空值)')}</span></td><td>${change.to ? `<code>${escapeHtml(change.to)}</code>` : '<span class="empty-param">留空</span>'}</td></tr>`).join('');
  }

  function showEmpty() {
    activeResult = null;
    $('conversionEmpty').classList.remove('hidden');
    $('conversionResult').classList.add('hidden');
    $('detectedType').textContent = '等待链接';
    $('generatorMessage').textContent = '';
    $('copyStatus').textContent = '';
    $('copyLink').disabled = true;
  }

  function showError(message) {
    activeResult = null;
    $('generatorMessage').textContent = message;
    $('conversionEmpty').classList.remove('hidden');
    $('conversionResult').classList.add('hidden');
    $('detectedType').textContent = '无法识别';
    $('copyLink').disabled = true;
  }

  function convertFromInput(showRequiredMessage = true) {
    const original = $('originalLink').value.trim();
    $('copyStatus').textContent = '';
    if (!original) {
      showEmpty();
      if (showRequiredMessage) $('generatorMessage').textContent = '请先粘贴一条完整的 Tracking Link';
      return null;
    }
    try {
      const result = convertTrackingLink(original, activeTemplate());
      activeResult = result;
      const typeLabel = result.type === 'imp' ? 'Impression' : 'Click';
      $('detectedType').innerHTML = `<span class="type-chip">${typeLabel}</span>`;
      $('summaryType').textContent = typeLabel;
      $('replacementCount').textContent = result.changes.length;
      $('preservedCount').textContent = result.preservedCount;
      $('urlLength').textContent = `${result.url.length} chars`;
      output.textContent = result.url;
      renderChanges(result.changes);
      $('generatorMessage').textContent = result.changes.length ? '' : '链接有效，但没有发现需要替换的参数';
      $('conversionEmpty').classList.add('hidden');
      $('conversionResult').classList.remove('hidden');
      $('copyLink').disabled = false;
      return result;
    } catch (error) {
      showError(error.message === 'Invalid URL' ? '链接格式不正确，请粘贴包含 http:// 或 https:// 的完整链接' : error.message);
      return null;
    }
  }

  function extractPkg(url) {
    try { return new URL(url).searchParams.get('pkg') || '—'; }
    catch (_) { return '—'; }
  }

  function convertAndSave() {
    if (!ensureSession()) return;
    const result = convertFromInput(true);
    if (!result) return;
    const saved = historyStore.add({ username:current.username, userRole:current.role, platform:activeTemplate().name, pkg:extractPkg(result.url), type:result.type, url:result.url });
    if (!saved.ok) return showToast('转换成功，但浏览器无法保存记录');
    updateHistoryCount();
    $('generatorMessage').textContent = '转换完成，已记录操作用户';
    showToast('转换完成并已保存记录');
  }

  function loadSample() {
    $('originalLink').value = activeTemplate().sample || '';
    convertFromInput(false);
  }

  async function copyText(text) {
    try { await navigator.clipboard.writeText(text); }
    catch (_) {
      const area = document.createElement('textarea'); area.value = text;
      area.style.position = 'fixed'; area.style.opacity = '0';
      document.body.appendChild(area); area.select(); document.execCommand('copy'); area.remove();
    }
  }

  async function copyUrl() {
    if (!activeResult || !ensureSession()) return;
    await copyText(activeResult.url);
    $('copyStatus').textContent = '已复制'; showToast('转换后的平台链接已复制');
  }

  function showToast(message) {
    const toast = $('toast'); toast.textContent = message; toast.classList.add('show');
    clearTimeout(showToast.timer); showToast.timer = setTimeout(() => toast.classList.remove('show'), 1800);
  }

  function escapeHtml(value) {
    return String(value).replace(/[&<>"']/g, (char) => ({ '&':'&amp;', '<':'&lt;', '>':'&gt;', '"':'&quot;', "'":'&#39;' })[char]);
  }

  $('logoutBtn').addEventListener('click', () => { auth.logout(); location.href = 'login.html'; });
  platformSelect.addEventListener('change', renderPlatform);
  $('macroSearch').addEventListener('input', renderMacros);
  $('convertLink').addEventListener('click', convertAndSave);
  $('sampleLink').addEventListener('click', loadSample);
  $('copyLink').addEventListener('click', copyUrl);
  $('clearConverter').addEventListener('click', () => { $('originalLink').value = ''; showEmpty(); $('originalLink').focus(); });
  $('originalLink').addEventListener('input', () => { clearTimeout(inputTimer); inputTimer = setTimeout(() => convertFromInput(false), 220); });
  window.addEventListener('storage', (event) => { if (event.key === historyStore.STORAGE_KEY) updateHistoryCount(); });

  renderPlatform(); showEmpty(); updateHistoryCount();
})();