/* Darksteel Technologies — nav, scroll-reveal, contact form. No dependencies. */
(function () {
  // ---- Mobile nav ----
  var header = document.getElementById('siteHeader');
  var toggle = document.getElementById('navToggle');
  if (toggle && header) {
    toggle.addEventListener('click', function () {
      var open = header.classList.toggle('open');
      toggle.setAttribute('aria-expanded', open ? 'true' : 'false');
    });
  }

  // ---- Scroll reveal ----
  var reveals = document.querySelectorAll('.reveal');
  if ('IntersectionObserver' in window && reveals.length) {
    var io = new IntersectionObserver(function (entries) {
      entries.forEach(function (e) {
        if (e.isIntersecting) { e.target.classList.add('in'); io.unobserve(e.target); }
      });
    }, { threshold: 0.12, rootMargin: '0px 0px -40px 0px' });
    reveals.forEach(function (el) { io.observe(el); });
  } else {
    reveals.forEach(function (el) { el.classList.add('in'); });
  }

  // ---- Contact form ----
  var CONTACT_ENDPOINT = window.CONTACT_ENDPOINT || '';
  var form = document.getElementById('contactForm');
  if (!form) return;
  var statusEl = document.getElementById('formStatus');
  var btn = document.getElementById('submitBtn');
  function setStatus(kind, msg) { if (statusEl) { statusEl.className = 'form-status show ' + kind; statusEl.textContent = msg; } }

  form.addEventListener('submit', function (e) {
    e.preventDefault();
    if (form.website && form.website.value) { return; } // honeypot
    var data = {
      firstName: form.firstName.value.trim(), lastName: form.lastName.value.trim(),
      email: form.email.value.trim(), company: form.company ? form.company.value.trim() : '',
      message: form.message.value.trim()
    };
    if (!data.firstName || !data.lastName || !data.email || !data.message) { setStatus('err', 'Please fill in your name, email, and a message.'); return; }
    if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(data.email)) { setStatus('err', 'Please enter a valid email address.'); return; }

    if (!CONTACT_ENDPOINT) {
      var subject = encodeURIComponent('Website inquiry from ' + data.firstName + ' ' + data.lastName);
      var body = encodeURIComponent('Name: ' + data.firstName + ' ' + data.lastName + '\nEmail: ' + data.email + '\n' +
        (data.company ? 'Company: ' + data.company + '\n' : '') + '\n' + data.message);
      window.location.href = 'mailto:info@darksteeltechnologies.com?subject=' + subject + '&body=' + body;
      setStatus('ok', 'Opening your email app to send the message…');
      return;
    }
    btn.disabled = true; var original = btn.textContent; btn.textContent = 'Sending…';
    fetch(CONTACT_ENDPOINT, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(data) })
      .then(function (r) { if (!r.ok) throw new Error(r.status); return r.json().catch(function () { return {}; }); })
      .then(function () { form.reset(); setStatus('ok', 'Thanks — your message is on its way. We\'ll be in touch shortly.'); })
      .catch(function () { setStatus('err', 'Something went wrong. Please email info@darksteeltechnologies.com or call (888) 501-5621.'); })
      .finally(function () { btn.disabled = false; btn.textContent = original; });
  });
})();