(function () {
  function authBase() {
    return document.body.getAttribute('data-auth-base') || '';
  }

  function apiBase() {
    var bp = document.body.getAttribute('data-base-path') || '';
    return bp.replace(/\/issues\/?$/, '') + '/api/auth_register.php';
  }

  function formatCountdown(totalSeconds) {
    var s = Math.max(0, totalSeconds);
    var m = Math.floor(s / 60);
    var r = s % 60;
    return m + ':' + String(r).padStart(2, '0');
  }

  function parseExpiresMs(iso) {
    if (!iso) return 0;
    var t = Date.parse(iso.replace(' ', 'T') + 'Z');
    if (Number.isNaN(t)) {
      t = Date.parse(iso);
    }
    return t;
  }

  function initCountdown(expiresTs, countdownEl, onExpired) {
    var expMs = expiresTs > 0 ? expiresTs * 1000 : 0;
    if (!expMs) {
      countdownEl.textContent = '—';
      return null;
    }
    function tick() {
      var left = Math.ceil((expMs - Date.now()) / 1000);
      if (left <= 0) {
        countdownEl.textContent = '0:00';
        if (onExpired) onExpired();
        return;
      }
      countdownEl.textContent = formatCountdown(left);
    }
    tick();
    return window.setInterval(tick, 1000);
  }

  async function postJson(body) {
    var res = await fetch(apiBase(), {
      method: 'POST',
      credentials: 'same-origin',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(body),
    });
    var data = await res.json().catch(function () { return {}; });
    return { ok: res.ok && data.ok !== false, status: res.status, data: data };
  }

  document.addEventListener('DOMContentLoaded', function () {
    var pending = document.getElementById('register-pending');
    var form = document.getElementById('register-form');
    var countdownEl = document.getElementById('register-countdown');
    var resendBtn = document.getElementById('register-resend-btn');
    var resendStatus = document.getElementById('register-resend-status');
    var emailEl = document.getElementById('register-pending-email');
    if (!pending || !countdownEl) return;

    var email = document.body.getAttribute('data-register-email') || '';
    var expiresTs = parseInt(document.body.getAttribute('data-register-expires-ts') || '0', 10);
    var timerId = null;

    function showPending(nextEmail, nextExpiresTs) {
      if (form) form.hidden = true;
      pending.hidden = false;
      email = nextEmail || email;
      expiresTs = nextExpiresTs || expiresTs;
      if (emailEl && email) emailEl.textContent = email;
      if (timerId) window.clearInterval(timerId);
      timerId = initCountdown(expiresTs, countdownEl, function () {
        if (resendStatus) {
          resendStatus.textContent = 'Verification link expired — use Resend to get a new one.';
          resendStatus.classList.add('error');
        }
        if (resendBtn) resendBtn.disabled = false;
      });
    }

    if (document.body.getAttribute('data-register-pending') === '1') {
      showPending(email, expiresTs);
    }

    if (resendBtn) {
      resendBtn.addEventListener('click', async function () {
        if (!email) {
          var input = form && form.querySelector('input[name="email"]');
          email = input ? input.value.trim() : '';
        }
        if (!email) {
          if (resendStatus) resendStatus.textContent = 'Enter your email on the registration form first.';
          return;
        }
        resendBtn.disabled = true;
        if (resendStatus) {
          resendStatus.textContent = 'Sending…';
          resendStatus.classList.remove('error');
        }
        var out = await postJson({ action: 'resend', email: email });
        if (out.ok && out.data.expires_at) {
          var ts = out.data.expires_at ? Math.floor(Date.parse(String(out.data.expires_at).replace(' ', 'T')) / 1000) : 0;
          if (!ts && out.data.ttl_seconds) {
            ts = Math.floor(Date.now() / 1000) + Number(out.data.ttl_seconds);
          }
          showPending(email, ts);
          if (resendStatus) resendStatus.textContent = 'Verification email sent.';
          resendBtn.disabled = false;
          return;
        }
        var err = (out.data && out.data.error) || 'resend_failed';
        if (resendStatus) {
          resendStatus.textContent = err === 'rate_limited'
            ? 'Too many attempts — wait a few minutes.'
            : err === 'not_pending'
              ? 'No pending registration for this email.'
              : err === 'mail_failed'
                ? 'Could not send email — contact support.'
                : 'Could not resend verification email.';
          resendStatus.classList.add('error');
        }
        resendBtn.disabled = false;
      });
    }
  });
})();