// ====== Lucide Icons Init ======
function initIcons() {
  if (typeof lucide !== 'undefined') {
    lucide.createIcons();
  }
}
initIcons();

// ====== Theme Toggle ======
(function () {
  const root = document.documentElement;
  const toggle = document.getElementById('theme-toggle');
  const stored = localStorage.getItem('omniverse-theme');

  // Determine initial theme: stored > system preference > dark
  const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
  const initialTheme = stored || (prefersDark ? 'dark' : 'dark'); // Default to dark for premium feel

  if (initialTheme === 'light') {
    root.classList.remove('dark');
  } else {
    root.classList.add('dark');
  }

  toggle?.addEventListener('click', () => {
    root.classList.toggle('dark');
    const isDark = root.classList.contains('dark');
    localStorage.setItem('omniverse-theme', isDark ? 'dark' : 'light');
    initIcons();
  });
})();

// ====== Navbar Scroll Effect ======
(function () {
  const navbar = document.getElementById('navbar');
  let ticking = false;

  function updateNavbar() {
    if (window.scrollY > 20) {
      navbar.classList.add('scrolled');
    } else {
      navbar.classList.remove('scrolled');
    }
    ticking = false;
  }

  window.addEventListener('scroll', () => {
    if (!ticking) {
      requestAnimationFrame(updateNavbar);
      ticking = true;
    }
  });
})();

// ====== Mobile Menu ======
(function () {
  const toggle = document.getElementById('mobile-toggle');
  const menu = document.getElementById('mobile-menu');
  const menuIcon = document.getElementById('menu-icon');
  let isOpen = false;

  function toggleMenu() {
    isOpen = !isOpen;
    if (isOpen) {
      menu.classList.remove('hidden');
      menuIcon.setAttribute('data-lucide', 'x');
    } else {
      menu.classList.add('hidden');
      menuIcon.setAttribute('data-lucide', 'menu');
    }
    initIcons();
  }

  toggle?.addEventListener('click', toggleMenu);

  // Close on link click
  menu?.querySelectorAll('a').forEach((link) => {
    link.addEventListener('click', () => {
      if (isOpen) toggleMenu();
    });
  });

  // Close on outside click
  document.addEventListener('click', (e) => {
    if (isOpen && !menu.contains(e.target) && !toggle.contains(e.target)) {
      toggleMenu();
    }
  });
})();

// ====== Scroll Reveal Animation ======
(function () {
  const reveals = document.querySelectorAll('.reveal');

  const observer = new IntersectionObserver(
    (entries) => {
      entries.forEach((entry) => {
        if (entry.isIntersecting) {
          entry.target.classList.add('revealed');
          observer.unobserve(entry.target);
        }
      });
    },
    { threshold: 0.12, rootMargin: '0px 0px -60px 0px' }
  );

  reveals.forEach((el) => observer.observe(el));
})();

// ====== FAQ Accordion ======
(function () {
  const faqItems = document.querySelectorAll('.faq-item');

  faqItems.forEach((item) => {
    const trigger = item.querySelector('.faq-trigger');
    trigger?.addEventListener('click', () => {
      const isActive = item.classList.contains('active');

      // Close all
      faqItems.forEach((other) => {
        other.classList.remove('active');
        const otherTrigger = other.querySelector('.faq-trigger');
        if (otherTrigger) otherTrigger.setAttribute('aria-expanded', 'false');
      });

      // Open clicked
      if (!isActive) {
        item.classList.add('active');
        trigger.setAttribute('aria-expanded', 'true');
      }
    });
  });
})();

// ====== Contact Form (WhatsApp) ======
(function () {
  const form = document.getElementById('contact-form');

  form?.addEventListener('submit', (e) => {
    e.preventDefault();

    const name = document.getElementById('name')?.value.trim() || '';
    const clientType = document.getElementById('client-type')?.value || '';
    const service = document.getElementById('service')?.value || '';
    const notes = document.getElementById('notes')?.value.trim() || '';

    if (!name) return;

    const message = [
      `Halo Omniverse One,`,
      ``,
      `Nama: ${name}`,
      `Kategori Klien: ${clientType}`,
      `Layanan: ${service}`,
      notes ? `Catatan: ${notes}` : '',
    ]
      .filter(Boolean)
      .join('\n');

    const encoded = encodeURIComponent(message);
    window.open(`https://wa.me/?text=${encoded}`, '_blank');
  });
})();

// ====== Back to Top ======
(function () {
  const btn = document.getElementById('back-to-top');
  let ticking = false;

  function updateBtn() {
    if (window.scrollY > 600) {
      btn?.classList.remove('hidden');
      btn?.classList.add('flex');
    } else {
      btn?.classList.add('hidden');
      btn?.classList.remove('flex');
    }
    ticking = false;
  }

  window.addEventListener('scroll', () => {
    if (!ticking) {
      requestAnimationFrame(updateBtn);
      ticking = true;
    }
  });

  btn?.addEventListener('click', () => {
    window.scrollTo({ top: 0, behavior: 'smooth' });
  });
})();

// ====== Year ======
document.getElementById('year').textContent = new Date().getFullYear();

// ====== Active Nav Link Highlighting ======
(function () {
  const sections = document.querySelectorAll('section[id]');
  const navLinks = document.querySelectorAll('.nav-link');

  const observer = new IntersectionObserver(
    (entries) => {
      entries.forEach((entry) => {
        if (entry.isIntersecting) {
          const id = entry.target.getAttribute('id');
          navLinks.forEach((link) => {
            const href = link.getAttribute('href');
            if (href === `#${id}`) {
              link.style.color = 'var(--foreground)';
            } else {
              link.style.color = '';
            }
          });
        }
      });
    },
    { threshold: 0.3, rootMargin: '-80px 0px -50% 0px' }
  );

  sections.forEach((sec) => observer.observe(sec));
})();

// ====== Smooth Anchor Scroll ======
document.querySelectorAll('a[href^="#"]').forEach((anchor) => {
  anchor.addEventListener('click', function (e) {
    const href = this.getAttribute('href');
    if (href === '#') return;
    const target = document.querySelector(href);
    if (target) {
      e.preventDefault();
      const offset = 80;
      const top = target.getBoundingClientRect().top + window.scrollY - offset;
      window.scrollTo({ top, behavior: 'smooth' });
    }
  });
});

// Re-init icons after dynamic changes
setTimeout(initIcons, 100);