/**
 * Lumerel — 3D Homepage
 * main.js
 *
 * Handles:
 *  - Spline 3D scene loading & pointer-events toggle
 *  - Navbar scroll behaviour (frosted glass on scroll)
 *  - Video autoplay fallback (iOS / autoplay-blocked browsers)
 *  - Waitlist button click handlers
 *  - Global helpers exposed on window.Lumerel
 */

/* ── Spline Integration ─────────────────────────────────────────────
 *
 *  WHEN YOUR SPLINE SCENE IS READY:
 *
 *  Option A — HTML (simplest):
 *    Open index.html, find #spline-layer, delete .spline-placeholder,
 *    and paste in:
 *
 *      <spline-viewer
 *        url="https://prod.spline.design/YOUR_SCENE_ID/scene.splinecode"
 *        events-target="global"
 *      ></spline-viewer>
 *
 *  Option B — JavaScript:
 *    Call window.Lumerel.loadSplineScene('https://prod.spline.design/…');
 *    This removes the placeholder and injects <spline-viewer> for you.
 *
 *  Option C — @splinetool/runtime (advanced):
 *    import { Application } from '@splinetool/runtime';
 *    const app = new Application(canvas);
 *    app.load('https://prod.spline.design/YOUR_SCENE_ID/scene.splinecode');
 *
 *  For interactive scenes (mouse/touch on the 3D layer), call:
 *    window.Lumerel.enableSpline()
 *
 * ─────────────────────────────────────────────────────────────────── */

const splineLayer = document.getElementById('spline-layer');

/**
 * Enable pointer events on the 3D layer so Spline scenes
 * can receive mouse/touch input.
 * Call this AFTER your Spline scene has loaded.
 */
function enableSpline() {
  if (splineLayer) {
    splineLayer.style.pointerEvents = 'auto';
    console.log('[Lumerel] Spline pointer events ENABLED.');
  }
}

/**
 * Disable pointer events on the 3D layer (default state).
 * Ensures all UI elements (buttons, links) remain fully clickable.
 */
function disableSpline() {
  if (splineLayer) {
    splineLayer.style.pointerEvents = 'none';
    console.log('[Lumerel] Spline pointer events DISABLED.');
  }
}

/**
 * Programmatically load a Spline scene by URL.
 * Removes the placeholder orbs and injects a <spline-viewer>.
 * @param {string} sceneUrl - The Spline scene URL (.splinecode)
 * @param {boolean} [enableInteraction=false] - Auto-enable pointer events
 */
function loadSplineScene(sceneUrl, enableInteraction = false) {
  if (!splineLayer) return;

  // Remove placeholder
  const placeholder = splineLayer.querySelector('.spline-placeholder');
  if (placeholder) placeholder.remove();

  // Inject spline-viewer
  const viewer = document.createElement('spline-viewer');
  viewer.setAttribute('url', sceneUrl);
  viewer.setAttribute('events-target', 'global');
  viewer.style.width = '100%';
  viewer.style.height = '100%';
  viewer.style.display = 'block';

  viewer.addEventListener('load', () => {
    console.log('[Lumerel] Spline scene loaded:', sceneUrl);
    if (enableInteraction) enableSpline();
  });

  splineLayer.appendChild(viewer);
  console.log('[Lumerel] Spline scene injected:', sceneUrl);
}

// Listen for spline-viewer ready event if already in HTML
if (splineLayer) {
  const existingViewer = splineLayer.querySelector('spline-viewer');
  if (existingViewer) {
    existingViewer.addEventListener('load', () => {
      console.log('[Lumerel] Spline scene loaded.');
      // Uncomment to auto-enable 3D interactivity:
      // enableSpline();
    });
  }
}

/* ── Navbar Scroll Effect ───────────────────────────────────────────
   Adds a frosted-glass background when the user scrolls past 24px.
────────────────────────────────────────────────────────────────────── */
const navbar = document.getElementById('navbar');

function handleNavbarScroll() {
  if (!navbar) return;
  if (window.scrollY > 24) {
    navbar.style.background          = 'rgba(0, 0, 0, 0.45)';
    navbar.style.backdropFilter       = 'blur(16px)';
    navbar.style.webkitBackdropFilter = 'blur(16px)';
  } else {
    navbar.style.background          = 'transparent';
    navbar.style.backdropFilter       = 'none';
    navbar.style.webkitBackdropFilter = 'none';
  }
}

window.addEventListener('scroll', handleNavbarScroll, { passive: true });
handleNavbarScroll(); // run immediately on load

/* ── Video Autoplay Fallback ────────────────────────────────────────
   Gracefully handles browsers that block autoplay or fail to
   load the background video.
────────────────────────────────────────────────────────────────────── */
const heroVideo = document.querySelector('.hero__video');

if (heroVideo) {
  // Error: video failed to load — show a subtle gradient fallback
  heroVideo.addEventListener('error', () => {
    console.warn('[Lumerel] Background video failed to load — using fallback gradient.');
    const videoWrap = document.querySelector('.hero__video-wrap');
    if (videoWrap) {
      videoWrap.style.background = 'radial-gradient(ellipse at 60% 40%, #0d0d1a 0%, #000 70%)';
    }
  });

  // iOS Safari: resume playback after first user interaction
  document.addEventListener('touchstart', () => {
    if (heroVideo.paused) {
      heroVideo.play().catch(() => {});
    }
  }, { once: true });
}

/* ── Waitlist Button Handlers ───────────────────────────────────────
   Replace the console.log with your modal, form, or redirect logic.
────────────────────────────────────────────────────────────────────── */
const waitlistButtons = document.querySelectorAll('.btn-pill');

waitlistButtons.forEach((btn) => {
  btn.addEventListener('click', () => {
    console.log('[Lumerel] Waitlist button clicked — wire up your modal or form here.');
    // Example: open a modal
    // document.getElementById('waitlist-modal').classList.add('open');
    // Example: redirect
    // window.location.href = '/waitlist';
  });
});

/* ── Global API ─────────────────────────────────────────────────────
   Exposed on window.Lumerel for console/external use.
────────────────────────────────────────────────────────────────────── */
window.Lumerel = {
  enableSpline,
  disableSpline,
  loadSplineScene,
  version: '1.0.0',
};

console.log('[Lumerel] 3D Homepage ready. window.Lumerel API available.');