/* The OC Guy — page behaviour.
   Everything here degrades: without JS the page still reads, the bands still
   show their titles, the tips still list, the form still shows. */
(function () {
  'use strict';

  var doc = document.documentElement;
  doc.classList.add('js');

  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

  /* ---------- signature move: the shutter on the hero photograph ---------- */
  var hero = document.querySelector('.hero-line');
  if (hero) {
    if (reduce) {
      hero.classList.add('shutter');
    } else {
      requestAnimationFrame(function () {
        setTimeout(function () { hero.classList.add('shutter'); }, 120);
      });
    }
  }

  /* ---------- entrance for the parts of every section ---------- */
  var targets = [];
  document.querySelectorAll('.intro .statement, .open h2, .open p, .map-figure figcaption, .tips h2, .tips-note, .picker, .tips-list li, .about h2, .bio, .about-facts, .ask-line, .ask-note, .band-text, .foot-invite, .foot-links').forEach(function (el) {
    targets.push(el);
  });

  if (!reduce && 'IntersectionObserver' in window) {
    var io = new IntersectionObserver(function (entries) {
      entries.forEach(function (entry) {
        if (!entry.isIntersecting) return;
        entry.target.classList.add('rv-in');
        io.unobserve(entry.target);
      });
    }, { rootMargin: '0px 0px -12% 0px', threshold: 0.12 });

    targets.forEach(function (el, i) {
      el.setAttribute('data-rv', String((i % 4) + 1));
      io.observe(el);
    });
  } else {
    targets.forEach(function (el) { el.classList.add('rv-in'); });
  }

  /* ---------- switches: five claims ---------- */
  document.querySelectorAll('.band-switch').forEach(function (btn) {
    btn.addEventListener('click', function () {
      var band = btn.closest('.band');
      var on = btn.getAttribute('aria-checked') === 'true';
      btn.setAttribute('aria-checked', String(!on));
      band.setAttribute('data-on', String(!on));
    });
  });

  /* ---------- the live thing: pick what the company does ---------- */
  var chips = Array.prototype.slice.call(document.querySelectorAll('.chip'));
  var out = document.querySelector('.picker-out');
  var installOrder = ['Sales', 'CRM', 'Purchase', 'Manufacturing', 'Inventory', 'Project', 'Timesheets', 'Expenses', 'Invoicing', 'Accounting'];

  function render(mods) {
    if (!mods.length) {
      out.textContent = 'Choose one, or several. The modules stack in the order you would install them.';
      return;
    }
    out.innerHTML = '';
    mods.forEach(function (name, i) {
      var span = document.createElement('span');
      span.className = 'mod';
      span.textContent = name;
      out.appendChild(span);
      if (i < mods.length - 1) {
        var arrow = document.createElement('span');
        arrow.className = 'arrow';
        arrow.textContent = ' → ';
        out.appendChild(arrow);
      }
    });
    var note = document.createElement('span');
    note.className = 'arrow';
    note.textContent = ' — that order, top to bottom.';
    out.appendChild(note);
  }

  chips.forEach(function (chip) {
    chip.setAttribute('aria-pressed', 'false');
    chip.addEventListener('click', function () {
      var pressed = chip.getAttribute('aria-pressed') === 'true';
      chip.setAttribute('aria-pressed', String(!pressed));

      var picked = chips.filter(function (c) { return c.getAttribute('aria-pressed') === 'true'; })
        .reduce(function (all, c) {
          c.dataset.modules.split(',').forEach(function (m) {
            var name = m.trim();
            if (all.indexOf(name) === -1) all.push(name);
          });
          return all;
        }, []);

      picked.sort(function (a, b) { return installOrder.indexOf(a) - installOrder.indexOf(b); });
      render(picked);
    });
  });

  /* ---------- ask: one question, by mail ---------- */
  var send = document.querySelector('.ask-send');
  var mail = document.getElementById('ask-mail');
  if (send && mail) {
    send.addEventListener('click', function () {
      var addr = (mail.value || '').trim();
      var body = 'My question about Odoo Community:\n\n\n';
      if (addr) body += '\n— reply to: ' + addr + '\n';
      var href = 'mailto:o.arnold@projektbox.de'
        + '?subject=' + encodeURIComponent('Odoo Community question')
        + '&body=' + encodeURIComponent(body);
      if (addr && addr.indexOf('@') === -1) {
        mail.focus();
        mail.setAttribute('aria-invalid', 'true');
        return;
      }
      mail.removeAttribute('aria-invalid');
      window.location.href = href;
    });
    mail.addEventListener('keydown', function (e) {
      if (e.key === 'Enter') send.click();
    });
  }

  /* ---------- one moving picture: the world map drifts against the scroll ---------- */
  var map = document.getElementById('worldmap');
  if (map && !reduce) {
    var ticking = false;
    var update = function () {
      var rect = map.getBoundingClientRect();
      var vh = window.innerHeight || 800;
      if (rect.bottom > -200 && rect.top < vh + 200) {
        var progress = (rect.top + rect.height / 2 - vh / 2) / vh;
        map.style.transform = 'translate3d(0,' + (progress * -26).toFixed(2) + 'px,0) scale(1.06)';
      }
      ticking = false;
    };
    window.addEventListener('scroll', function () {
      if (!ticking) { ticking = true; requestAnimationFrame(update); }
    }, { passive: true });
    update();
  }
})();