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

/* ── Spline Integration ──────────────────────────────────────
 *
 *  WHEN YOUR SPLINE SCENE IS READY:
 *
 *  1. Open index.html and replace the .hero__3d-placeholder div
 *     with a <spline-viewer> element:
 *
 *     <spline-viewer
 *       url="https://prod.spline.design/YOUR_SCENE_ID/scene.splinecode"
 *       events-target="global"
 *     ></spline-viewer>
 *
 *  2. If the scene needs mouse/touch interaction, uncomment the
 *     enableSplinePointerEvents() call in the 'load' listener below.
 *
 *  3. Optionally import the @splinetool/runtime package directly:
 *
 *     import { Application } from '@splinetool/runtime';
 *     const app = new Application(document.getElementById('my-canvas'));
 *     app.load('https://prod.spline.design/YOUR_SCENE_ID/scene.splinecode');
 *
 * ─────────────────────────────────────────────────────────── */

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 enableSplinePointerEvents() {
  if (splineLayer) {
    splineLayer.style.pointerEvents = 'auto';
    console.log('[Lumerel] Spline pointer events ENABLED.');
  }
}

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

// Listen for the spline-viewer web component ready event
if (splineLayer) {
  const viewer = splineLayer.querySelector('spline-viewer');
  if (viewer) {
    viewer.addEventListener('load', () => {
      console.log('[Lumerel] Spline scene loaded.');
      // Uncomment to enable 3D interactivity:
      // enableSplinePointerEvents();
    });
  }
}

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

function handleNavbarScroll() {
  if (!navbar) return;
  if (window.scrollY > 20) {
    navbar.style.background = 'rgba(0, 0, 0, 0.40)';
    navbar.style.backdropFilter = 'blur(14px)';
    navbar.style.webkitBackdropFilter = 'blur(14px)';
  } else {
    navbar.style.background = 'transparent';
    navbar.style.backdropFilter = 'none';
    navbar.style.webkitBackdropFilter = 'none';
  }
}

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

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

if (heroVideo) {
  heroVideo.addEventListener('error', () => {
    console.warn('[Lumerel] Background video failed to load. Using fallback background.');
    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 integration.
──────────────────────────────────────────────────────────────── */
const waitlistBtns = document.querySelectorAll('.btn-pill');

waitlistBtns.forEach(btn => {
  btn.addEventListener('click', () => {
    console.log('[Lumerel] Join Waitlist clicked.');
    // TODO: open waitlist modal or navigate to signup form
    // Example: openWaitlistModal();
    // Example: window.location.href = '/waitlist';
  });
});

/* ── Expose helpers globally ─────────────────────────────────
   Access from DevTools console or other scripts:
   window.Lumerel.enableSplinePointerEvents()
──────────────────────────────────────────────────────────────── */
window.Lumerel = {
  enableSplinePointerEvents,
  disableSplinePointerEvents,
};