(() => {
  // The graph page owns the reminder when the chat is embedded inside it.
  if (window.self !== window.top) return;
  const header = document.querySelector('header');
  if (!header) return;
  const make = (tag, className, text) => {
    const element = document.createElement(tag);
    if (className) element.className = className;
    if (text !== undefined) element.textContent = text;
    return element;
  };
  const trigger = make('button', 'dq-trigger');
  trigger.type = 'button'; trigger.hidden = true;
  trigger.id = 'dataQualityAlert';
  trigger.setAttribute('aria-haspopup', 'dialog');
  trigger.append(make('span', 'dq-icon', '!'));
  const badge = make('span', '', '数据问题'); trigger.append(badge);
  header.append(trigger);
  const dialog = make('dialog', 'dq-dialog');
  dialog.id = 'dataQualityDialog'; dialog.setAttribute('aria-labelledby', 'dqTitle');
  const heading = make('div', 'dq-head');
  const title = make('h2', '', '数据质量提醒'); title.id = 'dqTitle';
  const close = make('button', 'dq-close', '×'); close.type = 'button';
  close.setAttribute('aria-label', '关闭数据质量提醒');
  heading.append(title, close);
  const body = make('div', 'dq-body'); body.setAttribute('aria-live', 'polite');
  dialog.append(heading, body); document.body.append(dialog);
  close.onclick = () => dialog.close();
  dialog.addEventListener('click', event => { if (event.target === dialog) {
    const box = dialog.getBoundingClientRect();
    if (event.clientX < box.left || event.clientX > box.right || event.clientY < box.top || event.clientY > box.bottom) dialog.close();
  }});
  let summary = null, selectedFile = '', generation = 0, loading = false;
  const endpoint = () => `${typeof apiBase === 'function' ? apiBase() : location.origin}/api/data-quality`;
  async function request(parameters = '') {
    const response = await fetch(endpoint() + parameters, {cache:'no-store', signal:AbortSignal.timeout(15000)});
    const data = await response.json();
    if (!response.ok) { const error = new Error(data.detail || '读取失败，请重试'); error.status = response.status; throw error; }
    return data;
  }
  function updateBadge(data) {
    summary = data; trigger.hidden = data.total === 0;
    trigger.classList.remove('dq-unavailable');
    badge.textContent = `数据问题 ${data.total}`;
    trigger.setAttribute('aria-label', `${Object.keys(data.datasets).length} 份文件共 ${data.total} 条数据问题，点击查看`);
    trigger.title = trigger.getAttribute('aria-label');
  }
  function showError(error) {
    body.replaceChildren(make('p', 'dq-error', error.message || '读取失败，请稍后重试'));
    const retry = make('button', 'dq-file', '重新加载'); retry.onclick = loadDetails; body.append(retry);
  }
  function render(data) {
    body.replaceChildren();
    body.append(make('p', 'dq-note', '以下记录因缺少主键未进入知识图谱。请在源数据中补齐后重新更新；此处展示该次发布保留的原始记录。'));
    if (!data.total) { body.append(make('p', 'dq-status', '当前版本没有缺少主键的记录。')); return; }
    const names = Object.keys(data.datasets);
    if (!names.includes(selectedFile)) selectedFile = names[0];
    body.append(make('p', 'dq-status', `共 ${names.length} 份文件，${data.total} 条问题记录`));
    const files = make('div', 'dq-files'); files.setAttribute('aria-label', '按来源文件查看');
    const list = make('div');
    const showFile = name => {
      selectedFile = name;
      for (const button of files.children) button.setAttribute('aria-pressed', String(button.dataset.file === name));
      list.replaceChildren();
      for (const record of data.records.filter(record => record.template === name)) {
        const card = make('section', 'dq-card');
        card.append(make('h3', '', `${record.file} · ${record.sheet} · 第 ${record.row} 行`));
        card.append(make('p', 'dq-problem', `${record.message}；${record.action}`));
        if (record.data_error) card.append(make('p', 'dq-problem', record.data_error));
        if (record.data) {
          const fields = make('dl', 'dq-data');
          for (const [key, value] of Object.entries(record.data)) {
            const missing = record.fields.includes(key);
            fields.append(make('dt', missing ? 'dq-missing' : '', key));
            const empty = value === null || value === undefined || (typeof value === 'string' && !value.trim());
            fields.append(make('dd', missing ? 'dq-missing' : '', empty ? '（空）' : typeof value === 'object' ? JSON.stringify(value) : String(value)));
          }
          card.append(fields);
        }
        list.append(card);
      }
    };
    for (const name of names) {
      const button = make('button', 'dq-file', `${name}.xlsx (${data.datasets[name]})`);
      button.type = 'button'; button.dataset.file = name;
      button.onclick = () => showFile(name); files.append(button);
    }
    body.append(files, list); showFile(selectedFile);
  }
  async function loadDetails() {
    const id = ++generation; loading = true;
    body.replaceChildren(make('p', 'dq-status', '正在读取问题记录…'));
    try {
      let data;
      try { data = await request('?details=true' + (summary ? '&data_version=' + encodeURIComponent(summary.data_version) : '')); }
      catch (error) { if (error.status !== 409) throw error; data = await request('?details=true'); }
      if (id !== generation) return;
      updateBadge(data); render(data);
    } catch (error) { if (id === generation) showError(error); }
    finally { if (id === generation) loading = false; }
  }
  trigger.onclick = () => { dialog.showModal(); loadDetails(); };
  async function refresh() {
    if (loading) return;
    try {
      const previous = summary?.data_version;
      const data = await request(); updateBadge(data);
      if (dialog.open && previous !== data.data_version) loadDetails();
    } catch (error) {
      trigger.hidden = false; trigger.classList.add('dq-unavailable');
      badge.textContent = '数据提醒暂不可用'; trigger.title = error.message;
      trigger.setAttribute('aria-label', '数据提醒暂不可用，点击重试');
    }
  }
  refresh(); setInterval(refresh, 30000);
  window.addEventListener('focus', refresh);
})();