/**
 * Live Pulse article cards with LPS-1 mint buttons — pulse.html + index fallback grid.
 */
(function () {
  'use strict';

  var root = document.getElementById('pulse-live-feed');
  if (!root) return;

  function esc(s) {
    return String(s || '')
      .replace(/&/g, '&')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;');
  }

  function renderCard(art) {
    var card = document.createElement('article');
    card.className = 'pulse-live-card';
    card.setAttribute('data-article-id', art.id || '');

    var meta =
      (art.desk || 'desk') +
      ' · R' +
      (art.ring || '?') +
      ' · Signal ' +
      (art.signal != null ? art.signal : '—') +
      (art.lps1_registration_id ? ' · ' + art.lps1_registration_id : '');

    card.innerHTML =
      '<h3>' +
      esc(art.title) +
      '</h3>' +
      '<div class="pulse-live-meta">' +
      esc(meta) +
      '</div>' +
      '<p>' +
      esc((art.summary || '').slice(0, 280)) +
      (art.summary && art.summary.length > 280 ? '…' : '') +
      '</p>' +
      '<div class="lps-mint-host"></div>';

    var host = card.querySelector('.lps-mint-host');
    if (window.GMIIELpsMint && art.id) {
      window.GMIIELpsMint.renderButton(host, {
        briefId: art.id,
        title: art.title,
        lps1Id: art.lps1_registration_id,
      });
    }

    return card;
  }

  fetch('/api/articles?limit=12', { cache: 'no-store', signal: AbortSignal.timeout(15000) })
    .then(function (r) {
      return r.ok ? r.json() : null;
    })
    .then(function (data) {
      var articles = (data && data.articles) || [];
      if (!articles.length) {
        root.innerHTML = '<p class="pulse-live-meta">No live articles — run intelligence pipeline.</p>';
        return;
      }

      var hd = document.createElement('div');
      hd.className = 'pulse-live-feed-hd';
      hd.textContent = 'Live edition · ' + articles.length + ' briefs · mint + yield on every card';
      root.appendChild(hd);

      articles.forEach(function (art) {
        root.appendChild(renderCard(art));
      });
    })
    .catch(function () {
      root.innerHTML = '<p class="pulse-live-meta">Live feed unavailable — check /api/articles</p>';
    });
})();