/* desfoto.de - progressive enhancement only. */
(function () {
  'use strict';

  /* Mobile navigation */
  var toggle = document.querySelector('[data-nav-toggle]');
  var nav = document.getElementById('site-nav');
  if (toggle && nav) {
    toggle.addEventListener('click', function () {
      var open = nav.classList.toggle('is-open');
      toggle.setAttribute('aria-expanded', open ? 'true' : 'false');
    });
    nav.addEventListener('click', function (event) {
      if (event.target.closest('a') && window.innerWidth < 832) {
        nav.classList.remove('is-open');
        toggle.setAttribute('aria-expanded', 'false');
      }
    });
  }

  /* Click-to-load YouTube (youtube-nocookie) */
  document.querySelectorAll('[data-video-id]').forEach(function (facade) {
    facade.addEventListener('click', function () {
      var id = facade.getAttribute('data-video-id');
      var iframe = document.createElement('iframe');
      iframe.setAttribute('src', 'https://www.youtube-nocookie.com/embed/' + encodeURIComponent(id) +
        '?autoplay=1&rel=0&modestbranding=1&playsinline=1');
      iframe.setAttribute('title', facade.getAttribute('aria-label') || 'Video');
      iframe.setAttribute('loading', 'eager');
      iframe.setAttribute('allow', 'accelerometer; clipboard-write; encrypted-media; gyroscope; picture-in-picture');
      iframe.setAttribute('allowfullscreen', '');
      iframe.setAttribute('referrerpolicy', 'strict-origin-when-cross-origin');
      var shell = facade.parentElement;
      shell.replaceChild(iframe, facade);
      iframe.focus();
    });
  });

  /* Contact form -> local mail draft, nothing is transmitted by this page */
  var form = document.querySelector('[data-contact-form]');
  if (form) {
    var status = form.querySelector('[data-contact-status]');
    form.addEventListener('submit', function (event) {
      event.preventDefault();
      var data = new FormData(form);
      var name = (data.get('name') || '').toString().trim();
      var email = (data.get('email') || '').toString().trim();
      var topic = (data.get('topic') || '').toString().trim();
      var date = (data.get('date') || '').toString().trim();
      var message = (data.get('message') || '').toString().trim();
      if (!name || !email || !message) {
        if (status) {
          status.hidden = false;
          status.textContent = 'Bitte Name, E-Mail und Nachricht ausfüllen.';
          status.style.color = '#95330F';
        }
        return;
      }
      var subject = 'Anfrage über desfoto.de: ' + topic;
      var body = 'Name: ' + name + '\nE-Mail: ' + email + '\nBereich: ' + topic +
        (date ? '\nWunschtermin: ' + date : '') + '\n\n' + message + '\n';
      window.location.href = 'mailto:info@dennyschulz.de?subject=' +
        encodeURIComponent(subject) + '&body=' + encodeURIComponent(body);
      if (status) {
        status.hidden = false;
        status.textContent = 'Dein Mailprogramm sollte sich mit dem fertigen Entwurf öffnen.';
        status.style.color = '';
      }
    });
  }

  /* Soft reveal on scroll, disabled for reduced motion */
  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  var items = document.querySelectorAll('.reveal');
  if (reduce || !('IntersectionObserver' in window)) {
    items.forEach(function (item) { item.classList.add('is-in'); });
  } else {
    var observer = new IntersectionObserver(function (entries) {
      entries.forEach(function (entry) {
        if (entry.isIntersecting) {
          entry.target.classList.add('is-in');
          observer.unobserve(entry.target);
        }
      });
    }, { rootMargin: '0px 0px -10% 0px', threshold: 0.05 });
    items.forEach(function (item) { observer.observe(item); });
  }
}());