// Relative timestamp ("time ago") for <time> elements
(function () {
  function timeAgo(date) {
    const now = new Date();
    const diff = now - date;
    const seconds = Math.floor(Math.abs(diff) / 1000);
    const isFuture = diff < 0;
    const prefix = isFuture ? 'in ' : '';
    const suffix = isFuture ? '' : ' ago';

    if (seconds < 5) return isFuture ? 'in a moment' : 'just now';
    if (seconds < 60) return prefix + seconds + 's' + suffix;
    const minutes = Math.floor(seconds / 60);
    if (minutes < 60) return prefix + minutes + 'm' + suffix;
    const hours = Math.floor(minutes / 60);
    if (hours < 24) return prefix + hours + 'h' + suffix;
    const days = Math.floor(hours / 24);
    if (days < 7) return prefix + days + 'd' + suffix;
    if (days < 30) return prefix + Math.floor(days / 7) + 'w' + suffix;
    if (days < 365) return prefix + Math.floor(days / 30) + 'mo' + suffix;
    return prefix + Math.floor(days / 365) + 'y' + suffix;
  }

  function updateTimes() {
    document.querySelectorAll('time[datetime]').forEach(function (el) {
      var raw = el.getAttribute('datetime');
      // SQLite stores UTC dates without a 'Z' suffix — add it so the browser
      // parses them as UTC instead of local time
      if (raw && !/[Z+\-]\d{0,4}$/i.test(raw)) {
        raw = raw.replace(' ', 'T') + 'Z';
      }
      var d = new Date(raw);
      if (!isNaN(d)) {
        el.textContent = timeAgo(d);
        el.title = d.toLocaleString();
      }
    });
  }

  updateTimes();
  setInterval(updateTimes, 30000); // refresh every 30s
})();