// ===================================
// ADMIN PANEL - JAVASCRIPT
// ===================================

const API = {
  products: '/api/products',
  adminProducts: '/api/admin/products',
  announcements: '/api/announcements',
  adminAnnouncements: '/api/admin/announcements',
  settings: '/api/settings',
  adminSettings: '/api/admin/settings'
};

// Initialize
document.addEventListener('DOMContentLoaded', () => {
  loadSettings();
  loadProducts();
  loadAnnouncements();
  setupForms();
});

// Setup forms
function setupForms() {
  document.getElementById('settingsForm').addEventListener('submit', saveSettings);
  document.getElementById('productForm').addEventListener('submit', addProduct);
  document.getElementById('announcementForm').addEventListener('submit', addAnnouncement);
}

// ============ SETTINGS ============
async function loadSettings() {
  try {
    const res = await fetch(API.settings);
    const json = await res.json();
    if (json.ok && json.data) {
      document.getElementById('heroTitle').value = json.data.heroTitle || '';
      document.getElementById('heroSubtitle').value = json.data.heroSubtitle || '';
      document.getElementById('theme').value = json.data.theme || 'dark';
    }
  } catch (e) {
    console.error('Failed to load settings:', e);
  }
}

async function saveSettings(e) {
  e.preventDefault();
  const data = {
    heroTitle: document.getElementById('heroTitle').value,
    heroSubtitle: document.getElementById('heroSubtitle').value,
    theme: document.getElementById('theme').value
  };

  try {
    const res = await fetch(API.adminSettings, {
      method: 'PUT',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data)
    });
    const json = await res.json();
    if (json.ok) {
      alert('Настройки сохранены! ✅');
    } else {
      alert('Ошибка: ' + json.error);
    }
  } catch (e) {
    alert('Ошибка сохранения: ' + e.message);
  }
}

// ============ PRODUCTS ============
async function loadProducts() {
  try {
    const res = await fetch(API.products);
    const json = await res.json();
    const list = document.getElementById('productsList');
    
    if (!json.ok || !json.data || json.data.length === 0) {
      list.innerHTML = '<p style="color:#86868b;text-align:center;padding:40px">Нет продуктов</p>';
      return;
    }

    list.innerHTML = json.data.map(p => `
      <div class="list-item">
        <div class="list-item-info">
          <div class="list-item-title">${p.name}</div>
          <div class="list-item-meta">
            ${p.tagline} • $${p.price} • 
            <span class="status-badge">${p.category}</span>
          </div>
        </div>
        <div class="list-item-actions">
          <button class="btn btn-secondary btn-small" onclick="editProduct(${p.id})">Изменить</button>
          <button class="btn btn-danger btn-small" onclick="deleteProduct(${p.id})">Удалить</button>
        </div>
      </div>
    `).join('');
  } catch (e) {
    console.error('Failed to load products:', e);
  }
}

function showAddProductForm() {
  document.getElementById('addProductForm').style.display = 'block';
  document.getElementById('productForm').reset();
}

function hideAddProductForm() {
  document.getElementById('addProductForm').style.display = 'none';
}

async function addProduct(e) {
  e.preventDefault();
  
  const features = document.getElementById('productFeatures').value
    .split(',')
    .map(f => f.trim())
    .filter(f => f);

  const data = {
    name: document.getElementById('productName').value,
    tagline: document.getElementById('productTagline').value,
    description: document.getElementById('productDescription').value,
    price: parseFloat(document.getElementById('productPrice').value),
    category: document.getElementById('productCategory').value,
    image: document.getElementById('productImage').value || 'https://picsum.photos/800/600?random=' + Date.now(),
    features: features
  };

  try {
    const res = await fetch(API.adminProducts, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data)
    });
    const json = await res.json();
    
    if (json.ok) {
      alert('Продукт добавлен! ✅');
      hideAddProductForm();
      loadProducts();
    } else {
      alert('Ошибка: ' + json.error);
    }
  } catch (e) {
    alert('Ошибка: ' + e.message);
  }
}

async function editProduct(id) {
  const res = await fetch(`${API.products}/${id}`);
  const json = await res.json();
  
  if (!json.ok) return alert('Продукт не найден');
  
  const p = json.data;
  if (confirm(`Редактировать "${p.name}"?\n\n(В полной версии откроется форма редактирования)`)) {
    // В полной версии здесь открывается форма с заполненными данными
    window.location.href = `edit-product.html?id=${id}`;
  }
}

async function deleteProduct(id) {
  if (!confirm('Вы уверены? Это действие нельзя отменить.')) return;

  try {
    const res = await fetch(`${API.adminProducts}/${id}`, { method: 'DELETE' });
    const json = await res.json();
    
    if (json.ok) {
      alert('Продукт удалён');
      loadProducts();
    }
  } catch (e) {
    alert('Ошибка: ' + e.message);
  }
}

// ============ ANNOUNCEMENTS ============
async function loadAnnouncements() {
  try {
    const res = await fetch(API.announcements);
    const json = await res.json();
    const list = document.getElementById('announcementsList');
    
    if (!json.ok || !json.data || json.data.length === 0) {
      list.innerHTML = '<p style="color:#86868b;text-align:center;padding:40px">Нет объявлений</p>';
      return;
    }

    list.innerHTML = json.data.map(a => `
      <div class="list-item">
        <div class="list-item-info">
          <div class="list-item-title">${a.title}</div>
          <div class="list-item-meta">
            ${a.content} • ${a.date} • 
            <span class="status-badge">${a.active ? 'Активно' : 'Скрыто'}</span>
          </div>
        </div>
        <div class="list-item-actions">
          <button class="btn btn-secondary btn-small" onclick="editAnnouncement(${a.id})">Изменить</button>
          <button class="btn btn-danger btn-small" onclick="deleteAnnouncement(${a.id})">Удалить</button>
        </div>
      </div>
    `).join('');
  } catch (e) {
    console.error('Failed to load announcements:', e);
  }
}

function showAddAnnouncementForm() {
  document.getElementById('addAnnouncementForm').style.display = 'block';
  document.getElementById('announcementForm').reset();
}

function hideAddAnnouncementForm() {
  document.getElementById('addAnnouncementForm').style.display = 'none';
}

async function addAnnouncement(e) {
  e.preventDefault();
  
  const data = {
    title: document.getElementById('announcementTitle').value,
    date: document.getElementById('announcementDate').value,
    content: document.getElementById('announcementContent').value
  };

  try {
    const res = await fetch(API.adminAnnouncements, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data)
    });
    const json = await res.json();
    
    if (json.ok) {
      alert('Объявление добавлено! ✅');
      hideAddAnnouncementForm();
      loadAnnouncements();
    } else {
      alert('Ошибка: ' + json.error);
    }
  } catch (e) {
    alert('Ошибка: ' + e.message);
  }
}

async function editAnnouncement(id) {
  if (confirm(`Редактировать объявление #${id}?\n\n(В полной версии откроется форма)`)) {
    window.location.href = `edit-announcement.html?id=${id}`;
  }
}

async function deleteAnnouncement(id) {
  if (!confirm('Удалить это объявление?')) return;

  try {
    const res = await fetch(`${API.adminAnnouncements}/${id}`, { method: 'DELETE' });
    const json = await res.json();
    
    if (json.ok) {
      alert('Объявление удалено');
      loadAnnouncements();
    }
  } catch (e) {
    alert('Ошибка: ' + e.message);
  }
}