// ===================================
// APPLE-STYLE APP - FRONTEND
// ===================================

const API = {
  products: '/api/products',
  announcements: '/api/announcements',
  settings: '/api/settings'
};

// Load settings and content
async function init() {
  await loadSettings();
  await loadAnnouncements();
  await loadProducts();
  setupScrollEffects();
  setupRevealAnimations();
}

// Load site settings
async function loadSettings() {
  try {
    const res = await fetch(API.settings);
    const json = await res.json();
    if (json.ok && json.data) {
      document.getElementById('heroTitle').textContent = json.data.heroTitle || 'Добро пожаловать';
      document.getElementById('heroSubtitle').textContent = json.data.heroSubtitle || 'Инновации здесь';
    }
  } catch (e) {
    console.error('Failed to load settings:', e);
  }
}

// Load announcements
async function loadAnnouncements() {
  try {
    const res = await fetch(API.announcements);
    const json = await res.json();
    const bar = document.getElementById('announcementBar');
    if (json.ok && json.data.length > 0) {
      const ann = json.data[0];
      bar.innerHTML = `${ann.title} — ${ann.content} <a href="#">Подробнее →</a>`;
    } else {
      bar.classList.add('hidden');
    }
  } catch (e) {
    console.error('Failed to load announcements:', e);
    document.getElementById('announcementBar').classList.add('hidden');
  }
}

// Load products
async function loadProducts() {
  try {
    const res = await fetch(API.products);
    const json = await res.json();
    const container = document.getElementById('productsContainer');
    if (!json.ok || !json.data) {
      container.innerHTML = '<p style="text-align:center;color:var(--text-secondary)">Нет продуктов</p>';
      return;
    }

    container.innerHTML = json.data.map((p, i) => `
      <div class="product-card" style="transition-delay: ${i * 100}ms">
        <img src="${p.image}" alt="${p.name}" class="product-image">
        <div class="product-content">
          <h3 class="product-name">${p.name}</h3>
          <p class="product-tagline">${p.tagline}</p>
          <p class="product-price">от ${p.price} $</p>
          <div class="product-features">
            ${p.features.map(f => `<span class="feature-tag">${f}</span>`).join('')}
          </div>
        </div>
      </div>
    `).join('');

    // Trigger visibility check after load
    setTimeout(checkProductVisibility, 100);
  } catch (e) {
    console.error('Failed to load products:', e);
    document.getElementById('productsContainer').innerHTML = '<p style="text-align:center;color:var(--text-secondary)">Ошибка загрузки</p>';
  }
}

// Scroll effects for navigation
function setupScrollEffects() {
  const nav = document.getElementById('nav');
  const heroBg = document.getElementById('heroBg');
  const featuresBg = document.getElementById('featuresBg');

  window.addEventListener('scroll', () => {
    const scrolled = window.pageYOffset;

    // Nav background
    if (scrolled > 100) {
      nav.classList.add('scrolled');
    } else {
      nav.classList.remove('scrolled');
    }

    // Hero parallax
    if (scrolled < window.innerHeight) {
      heroBg.style.transform = `translateY(${scrolled * 0.5}px) scale(${1 + scrolled * 0.0008})`;
    }

    // Features parallax
    const featuresSection = document.getElementById('features');
    if (featuresSection) {
      const rect = featuresSection.getBoundingClientRect();
      if (rect.top < window.innerHeight && rect.bottom > 0) {
        const offset = (window.innerHeight - rect.top) * 0.2;
        featuresBg.style.transform = `translateY(${offset}px)`;
      }
    }
  });
}

// Reveal animations on scroll
function setupRevealAnimations() {
  const reveals = document.querySelectorAll('.reveal');
  
  const checkReveal = () => {
    reveals.forEach(el => {
      const top = el.getBoundingClientRect().top;
      const trigger = window.innerHeight * 0.85;
      if (top < trigger) {
        el.classList.add('active');
      }
    });
  };

  window.addEventListener('scroll', checkReveal);
  checkReveal();
}

// Check product cards visibility
function checkProductVisibility() {
  const cards = document.querySelectorAll('.product-card');
  const observer = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
      if (entry.isIntersecting) {
        entry.target.classList.add('visible');
      }
    });
  }, { threshold: 0.1 });

  cards.forEach(card => observer.observe(card));
}

// Smooth scroll for anchor links
document.addEventListener('DOMContentLoaded', () => {
  document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function(e) {
      const href = this.getAttribute('href');
      if (href !== '#') {
        e.preventDefault();
        const target = document.querySelector(href);
        if (target) {
          target.scrollIntoView({ behavior: 'smooth', block: 'start' });
        }
      }
    });
  });

  init();
});