// Studio page — vanilla fade-carousel + tab sync + per-slide choreography.
// Replaces Bootstrap Carousel/Tab, jQuery, and backstretch. Keeps DrawFillSVG
// (window.DrawFillSVG, self-exposed from the v4-script bundle).

// --- shared chrome: navbar hide/show on scroll (ported from jQuery dw_hidenav) ---
(function () {
  const navbar = document.querySelector('.navbar');
  if (!navbar) return;
  const title = document.querySelector('.site-title a');
  const headerHeight = navbar.offsetHeight;
  let previousTop = 0;
  window.addEventListener('scroll', function () {
    const currentTop = window.scrollY;
    if (currentTop < previousTop) {
      if (currentTop > 0 && navbar.classList.contains('fixed')) {
        navbar.classList.add('visible');
        if (title) title.classList.remove('light');
      } else {
        navbar.classList.remove('visible', 'fixed');
        if (title) title.classList.add('light');
      }
    } else {
      navbar.classList.remove('visible');
      if (currentTop > headerHeight && !navbar.classList.contains('fixed')) {
        navbar.classList.add('fixed');
      }
    }
    previousTop = currentTop;
  }, { passive: true });
})();

document.querySelectorAll('.nav-toggle').forEach(function (el) {
  el.addEventListener('click', function (e) {
    e.preventDefault();
    el.classList.toggle('active');
  });
});

// --- studio fade-carousel ---
(function () {
  const stage = document.getElementById('studio-caro');
  const caro = document.getElementById('caro');
  if (!stage || !caro) return;
  const card = stage.querySelector('.dw-studio-stage') || stage; // contained rounded hero card that carries the per-slide bg

  const slides = Array.from(caro.querySelectorAll('.dw-fade-slide'));
  const tabs = Array.from(document.querySelectorAll('.dw-studio-tab'));
  const panes = Array.from(document.querySelectorAll('#studio-tab .tab-pane'));
  const bg = stage.querySelector('.dw-studio-bg');
  const video = stage.querySelector('.dw-studio-video'); // camera → Media slide
  const tv = stage.querySelector('.dw-studio-tv');       // grayscale → fact intro
  const title = document.querySelector('.site-title a');
  const studioTab = tabs.find((t) => t.getAttribute('href') === '#studio') || tabs[0];

  const GRADS = ['caro-grad', 'caro-grad2', 'caro-grad3', 'caro-grad5', 'caro-grad-dadada'];
  // per slide: gradient class · background image · show video · navbar-title light
  // Slides 0-4 are the tabbed sections; 5-7 the fact intro; 8 the Projects hero.
  const CONFIG = [
    { grad: 'caro-grad5', img: stage.dataset.bg0 || null, video: false, light: true, filter: 'url(#dw-duotone-slate)' }, // 0 Studio (slate-duotone hero)
    { grad: 'caro-grad2', img: null,                      video: false, light: true  }, // 1 Web/Dev (was UX)
    { grad: 'caro-grad3', img: null,                      video: false, light: false }, // 2 Graphic
    { grad: 'caro-grad5', img: null,                      video: true,  light: true  }, // 3 Media
    { grad: 'caro-grad5', img: stage.dataset.bg5 || null, video: false, light: true  }, // 4 Art
    { grad: 'caro-grad5', img: null, video: false, tv: true, light: true }, // 5 fact: web sites
    { grad: 'caro-grad5', img: null, video: false, tv: true, light: true }, // 6 fact: stars
    { grad: 'caro-grad5', img: null, video: false, tv: true, light: true }, // 7 fact: brain
    { grad: 'caro-grad-dadada', img: null, video: false, light: true }, // 8 Projects (#dadada card)
  ];
  const INTERVAL = 5000;

  let index = 0;
  let timer = null;

  function drawSVGs(slide) {
    if (!window.DrawFillSVG) return;
    slide.querySelectorAll('svg[id]').forEach(function (svg) {
      try {
        new window.DrawFillSVG({ elementId: svg.id }).replay();
      } catch (e) {
        /* svg not animatable — skip */
      }
    });
  }

  // Set the hero carousel slide (slide visibility, gradient, bg image, video/tv,
  // navbar-title colour). Does NOT touch the subnav tabs or content panes — those
  // are driven by setActiveTab, so the Wonder auto-cycle and the content-only
  // Projects tab can move the hero and the active tab independently.
  function setHero(i) {
    i = (i + slides.length) % slides.length;
    index = i;
    const cfg = CONFIG[i];

    slides.forEach((s, n) => {
      const on = n === i;
      s.classList.toggle('active', on);
      // reveal the active slide's hidden content (.animac.hide-svg, #brain.hide-svg …)
      if (on) s.querySelectorAll('.hide-svg').forEach((el) => el.classList.remove('hide-svg'));
    });

    GRADS.forEach((g) => card.classList.remove(g));
    card.classList.add(cfg.grad);

    if (bg) {
      bg.style.backgroundImage = cfg.img ? 'url("' + cfg.img + '")' : '';
      bg.style.filter = cfg.filter || ''; // slate duotone on the Studio hero only
    }
    if (video) {
      if (cfg.video) {
        video.style.display = 'block';
        video.play().catch(function () {});
      } else {
        video.pause();
        video.style.display = 'none';
      }
    }
    if (tv) {
      if (cfg.tv) {
        tv.style.display = 'block';
        tv.play().catch(function () {});
      } else {
        tv.pause();
        tv.style.display = 'none';
      }
    }

    if (title) title.classList.toggle('light', cfg.light);

    drawSVGs(slides[i]);
  }

  // Mark a subnav tab active and show its matching content pane, matched by the
  // tab's href hash → pane id (#studio → id="studio", #projects → id="projects").
  // Tabs with no pane (Wonder) simply hide every pane.
  function setActiveTab(tab) {
    tabs.forEach((t) => t.classList.toggle('active', t === tab));
    const hash = tab ? tab.getAttribute('href') || '' : '';
    const id = hash.charAt(0) === '#' ? hash.slice(1) : '';
    panes.forEach((p) => p.classList.toggle('active', p.id === id));
  }

  // "Craft" (the .dw-studio-wonder tab) auto-rotates the hero through the fact
  // slides (5,6,7) once and stops on the last, leaving the Craft tab + pane active.
  // Every other tab just switches on click — no autoplay.
  const WONDER = [5, 6, 7];
  let wonderTimer = null;
  function stopWonder() { if (wonderTimer) { window.clearTimeout(wonderTimer); wonderTimer = null; } }
  function runWonder() {
    stopWonder();
    let step = 0;
    (function tick() {
      setHero(WONDER[step]);
      step++;
      if (step < WONDER.length) wonderTimer = window.setTimeout(tick, INTERVAL);
      // ends on the last fact slide — the Craft tab + its pane stay active
    })();
  }

  tabs.forEach(function (t) {
    t.addEventListener('click', function (e) {
      e.preventDefault();
      stopWonder();
      setActiveTab(t);
      if (t.classList.contains('dw-studio-wonder')) runWonder();
      else setHero(parseInt(t.dataset.slide, 10) || 0);
    });
  });

  // No autoplay — the carousel advances only on subnav clicks (Wonder runs its own set).
  setActiveTab(studioTab);
  setHero(0);
})();