<!-- Dashboard Demo -->
<div id="app"></div>

<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
<script>
const { createApp, ref, computed, onMounted } = Vue

// Симуляция данных
const mockData = {
  stats: {
    totalSales: 125430,
    totalUsers: 8420,
    totalOrders: 1250,
    conversionRate: 3.2
  },
  salesData: [
    { month: 'Янв', value: 12000 },
    { month: 'Фев', value: 19000 },
    { month: 'Мар', value: 15000 },
    { month: 'Апр', value: 22000 },
    { month: 'Май', value: 28000 },
    { month: 'Июн', value: 25000 },
  ],
  recentOrders: [
    { id: 1, customer: 'Алексей М.', amount: 2500, status: 'completed' },
    { id: 2, customer: 'Мария К.', amount: 1800, status: 'pending' },
    { id: 3, customer: 'Иван П.', amount: 3200, status: 'completed' },
  ]
}

createApp({
  setup() {
    const activeTab = ref('dashboard')
    const isDark = ref(false)
    const stats = ref(mockData.stats)
    const salesData = ref(mockData.salesData)
    const recentOrders = ref(mockData.recentOrders)

    const maxSale = computed(() => 
      Math.max(...salesData.value.map(d => d.value))
    )

    const formatCurrency = (value) => 
      value.toLocaleString('ru-RU') + ' ₽'

    const statusColors = {
      completed: '#4caf50',
      pending: '#ff9800',
      cancelled: '#e53935'
    }

    return {
      activeTab,
      isDark,
      stats,
      salesData,
      recentOrders,
      maxSale,
      formatCurrency,
      statusColors
    }
  },
  template: `
    <div :class="['dashboard', { dark: isDark }]">
      <!-- Sidebar -->
      <aside class="sidebar">
        <div class="logo">📊 Admin</div>
        <nav>
          <a 
            v-for="tab in ['dashboard', 'users', 'products', 'settings']"
            :key="tab"
            :class="{ active: activeTab === tab }"
            @click="activeTab = tab"
          >
            {{ tab === 'dashboard' ? '📈' : tab === 'users' ? '👥' : tab === 'products' ? '📦' : '⚙️' }}
            {{ tab.charAt(0).toUpperCase() + tab.slice(1) }}
          </a>
        </nav>
      </aside>

      <!-- Main Content -->
      <main class="main">
        <!-- Header -->
        <header class="header">
          <h1>{{ activeTab.charAt(0).toUpperCase() + activeTab.slice(1) }}</h1>
          <button @click="isDark = !isDark" class="theme-toggle">
            {{ isDark ? '☀️' : '🌙' }}
          </button>
        </header>

        <!-- Dashboard Content -->
        <div v-if="activeTab === 'dashboard'" class="content">
          <!-- Stats Cards -->
          <div class="stats-grid">
            <div class="stat-card blue">
              <div class="stat-icon">💰</div>
              <div class="stat-info">
                <span class="stat-label">Продажи</span>
                <span class="stat-value">{{ formatCurrency(stats.totalSales) }}</span>
                <span class="stat-change positive">+12%</span>
              </div>
            </div>
            <div class="stat-card green">
              <div class="stat-icon">👥</div>
              <div class="stat-info">
                <span class="stat-label">Пользователи</span>
                <span class="stat-value">{{ stats.totalUsers.toLocaleString() }}</span>
                <span class="stat-change positive">+8%</span>
              </div>
            </div>
            <div class="stat-card orange">
              <div class="stat-icon">📦</div>
              <div class="stat-info">
                <span class="stat-label">Заказы</span>
                <span class="stat-value">{{ stats.totalOrders }}</span>
                <span class="stat-change negative">-3%</span>
              </div>
            </div>
            <div class="stat-card purple">
              <div class="stat-icon">📈</div>
              <div class="stat-info">
                <span class="stat-label">Конверсия</span>
                <span class="stat-value">{{ stats.conversionRate }}%</span>
                <span class="stat-change positive">+0.5%</span>
              </div>
            </div>
          </div>

          <!-- Chart -->
          <div class="chart-card">
            <h3>Продажи по месяцам</h3>
            <div class="chart">
              <div 
                v-for="item in salesData" 
                :key="item.month"
                class="chart-bar"
              >
                <div 
                  class="bar" 
                  :style="{ height: (item.value / maxSale * 100) + '%' }"
                >
                  <span class="bar-value">{{ (item.value / 1000).toFixed(0) }}k</span>
                </div>
                <span class="bar-label">{{ item.month }}</span>
              </div>
            </div>
          </div>

          <!-- Recent Orders -->
          <div class="orders-card">
            <h3>Последние заказы</h3>
            <table>
              <thead>
                <tr>
                  <th>ID</th>
                  <th>Клиент</th>
                  <th>Сумма</th>
                  <th>Статус</th>
                </tr>
              </thead>
              <tbody>
                <tr v-for="order in recentOrders" :key="order.id">
                  <td>#{{ order.id }}</td>
                  <td>{{ order.customer }}</td>
                  <td>{{ formatCurrency(order.amount) }}</td>
                  <td>
                    <span 
                      class="status-badge" 
                      :style="{ background: statusColors[order.status] }"
                    >
                      {{ order.status === 'completed' ? 'Выполнен' : 'В обработке' }}
                    </span>
                  </td>
                </tr>
              </tbody>
            </table>
          </div>
        </div>

        <!-- Other tabs placeholder -->
        <div v-else class="content placeholder">
          <p>Страница {{ activeTab }} в разработке</p>
        </div>
      </main>
    </div>
  `
}).mount('#app')
</script>

<style>
* { margin: 0; padding: 0; box-sizing: border-box; }

.dashboard {
  display: flex;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #f5f5f5;
  transition: background 0.3s;
}

.dashboard.dark {
  background: #1a1a2e;
  color: #eee;
}

.sidebar {
  width: 200px;
  background: #2d3748;
  color: white;
  padding: 20px 0;
}

.dark .sidebar {
  background: #16213e;
}

.logo {
  font-size: 20px;
  font-weight: bold;
  padding: 0 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
}

nav a:hover, nav a.active {
  background: rgba(255,255,255,0.1);
  color: white;
}

.main {
  flex: 1;
  padding: 20px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.theme-toggle {
  padding: 8px 16px;
  background: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 18px;
}

.dark .theme-toggle {
  background: #2d3748;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.dark .stat-card {
  background: #2d3748;
}

.stat-card.blue { border-left: 4px solid #2196f3; }
.stat-card.green { border-left: 4px solid #4caf50; }
.stat-card.orange { border-left: 4px solid #ff9800; }
.stat-card.purple { border-left: 4px solid #9c27b0; }

.stat-icon {
  font-size: 32px;
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 12px;
  color: #999;
  text-transform: uppercase;
}

.stat-value {
  font-size: 24px;
  font-weight: bold;
}

.stat-change {
  font-size: 12px;
}

.stat-change.positive { color: #4caf50; }
.stat-change.negative { color: #e53935; }

.chart-card, .orders-card {
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
}

.dark .chart-card, .dark .orders-card {
  background: #2d3748;
}

.chart {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  height: 200px;
  padding-top: 20px;
}

.chart-bar {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
}

.bar {
  width: 100%;
  background: linear-gradient(180deg, #2196f3, #1976d2);
  border-radius: 4px 4px 0 0;
  position: relative;
  min-height: 20px;
  transition: height 0.3s;
}

.bar-value {
  position: absolute;
  top: -20px;
  font-size: 11px;
  font-weight: bold;
}

.bar-label {
  margin-top: 8px;
  font-size: 12px;
  color: #666;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #eee;
}

.dark th, .dark td {
  border-bottom-color: #444;
}

.status-badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  color: white;
}

.placeholder {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 300px;
  color: #999;
}
</style>