<?php
// หน้าหลักสำหรับ ผู้ขายสินค้า (seller_dashboard.php)
require_once 'auth.php';

// ตรวจสอบว่าเป็น Seller หรือ Admin หรือไม่
requireSellerLogin();

$user = getCurrentUser();
$sellerId = $user['id'] ?? 0;
$isAdmin = isAdminLoggedIn();

// ดึงสถิติต่างๆ สำหรับ Dashboard ผู้ขาย (แยกตามร้านค้า)
try {
    if ($isAdmin) {
        $totalProducts = $conn->query("SELECT COUNT(*) FROM products")->fetchColumn();
        $totalOrders = $conn->query("SELECT COUNT(*) FROM orders")->fetchColumn();
        $totalSales = $conn->query("SELECT SUM(total_amount) FROM orders WHERE status != 'cancelled'")->fetchColumn() ?: 0;
        $latestOrders = $conn->query("SELECT * FROM orders ORDER BY created_at DESC LIMIT 5")->fetchAll();
    } else {
        // นับสินค้าเฉพาะของร้านผู้ขายคนนี้
        $stmtProdCount = $conn->prepare("SELECT COUNT(*) FROM products WHERE seller_id = :seller_id");
        $stmtProdCount->execute([':seller_id' => $sellerId]);
        $totalProducts = $stmtProdCount->fetchColumn();

        // นับออเดอร์เฉพาะที่มีสินค้าของร้านนี้
        $stmtOrdersCount = $conn->prepare("
            SELECT COUNT(DISTINCT o.id) 
            FROM orders o
            JOIN order_items oi ON o.id = oi.order_id
            JOIN product_variants pv ON oi.product_variant_id = pv.id
            JOIN products p ON pv.product_id = p.id
            WHERE p.seller_id = :seller_id
        ");
        $stmtOrdersCount->execute([':seller_id' => $sellerId]);
        $totalOrders = $stmtOrdersCount->fetchColumn();

        // รวมยอดขายเฉพาะสินค้าของร้านนี้
        $stmtSalesSum = $conn->prepare("
            SELECT SUM(oi.price * oi.quantity)
            FROM order_items oi
            JOIN orders o ON oi.order_id = o.id
            JOIN product_variants pv ON oi.product_variant_id = pv.id
            JOIN products p ON pv.product_id = p.id
            WHERE p.seller_id = :seller_id AND o.status != 'cancelled'
        ");
        $stmtSalesSum->execute([':seller_id' => $sellerId]);
        $totalSales = $stmtSalesSum->fetchColumn() ?: 0;

        // รายการออเดอร์ล่าสุดเฉพาะของร้านนี้
        $stmtLatestOrders = $conn->prepare("
            SELECT DISTINCT o.*
            FROM orders o
            JOIN order_items oi ON o.id = oi.order_id
            JOIN product_variants pv ON oi.product_variant_id = pv.id
            JOIN products p ON pv.product_id = p.id
            WHERE p.seller_id = :seller_id
            ORDER BY o.created_at DESC
            LIMIT 5
        ");
        $stmtLatestOrders->execute([':seller_id' => $sellerId]);
        $latestOrders = $stmtLatestOrders->fetchAll();
    }
} catch (PDOException $e) {
    $totalProducts = 0;
    $totalOrders = 0;
    $totalSales = 0;
    $latestOrders = [];
}
?>
<!DOCTYPE html>
<html lang="th">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>ระบบหลังบ้านผู้ขาย - AMARA STUDIO</title>
    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Sarabun:wght@300;400;500;600;700&display=swap">
    <style>
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        :root {
            --primary: #c5a880;
            --primary-hover: #b0936b;
            --dark: #121214;
            --sidebar-bg: #1a1a24;
            --card-bg: #ffffff;
            --text: #2d3748;
            --font-eng: 'Outfit', sans-serif;
            --font-th: 'Sarabun', sans-serif;
        }

        body {
            font-family: var(--font-th), var(--font-eng);
            background: #f4f6f9;
            color: var(--text);
            display: flex;
            min-height: 100vh;
        }

        /* Sidebar Nav */
        .sidebar {
            width: 260px;
            background: var(--sidebar-bg);
            color: white;
            padding: 30px 20px;
            display: flex;
            flex-direction: column;
        }

        .sidebar-logo {
            font-family: var(--font-eng);
            font-size: 22px;
            font-weight: 800;
            color: white;
            text-decoration: none;
            letter-spacing: 2px;
            margin-bottom: 40px;
            display: block;
        }

        .sidebar-logo span { color: var(--primary); }

        .nav-list { list-style: none; }

        .nav-item { margin-bottom: 8px; }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            border-radius: 10px;
            font-weight: 500;
            transition: all 0.2s;
        }

        .nav-link:hover, .nav-link.active {
            background: rgba(197, 168, 128, 0.15);
            color: var(--primary);
        }

        /* Main Content */
        .main-content {
            flex: 1;
            padding: 35px 40px;
            overflow-y: auto;
        }

        .top-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
        }

        .page-title {
            font-size: 24px;
            font-weight: 700;
        }

        .seller-badge {
            background: rgba(197, 168, 128, 0.2);
            color: #8c6e43;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
        }

        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            margin-bottom: 35px;
        }

        .stat-card {
            background: white;
            padding: 24px;
            border-radius: 16px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .stat-val {
            font-size: 28px;
            font-weight: 800;
            color: var(--dark);
            margin-top: 4px;
        }

        .stat-lbl {
            font-size: 13px;
            color: #718096;
            font-weight: 600;
        }

        .stat-icon {
            font-size: 32px;
            background: #f7fafc;
            width: 60px;
            height: 60px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Table Area */
        .table-card {
            background: white;
            border-radius: 16px;
            padding: 25px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        }

        .table-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

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

        th, td {
            padding: 14px 16px;
            text-align: left;
            border-bottom: 1px solid #edf2f7;
            font-size: 14px;
        }

        th {
            color: #718096;
            font-weight: 600;
            font-size: 13px;
            text-transform: uppercase;
        }

        .badge-status {
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }
        .badge-pending { background: #feebc8; color: #744210; }
        .badge-processing { background: #ebf8ff; color: #2b6cb0; }
        .badge-shipped { background: #c6f6d5; color: #22543d; }

        .btn-action {
            display: inline-block;
            padding: 8px 16px;
            background: var(--dark);
            color: white;
            text-decoration: none;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 600;
            transition: background 0.2s;
        }

        .btn-action:hover { background: var(--primary); }
    </style>
</head>
<body>

    <aside class="sidebar">
        <a href="index.php" class="sidebar-logo">AMARA<span>STUDIO</span></a>

        <ul class="nav-list">
            <li class="nav-item"><a href="seller_dashboard.php" class="nav-link active">📊 ภาพรวมผู้ขาย</a></li>
            <li class="nav-item"><a href="admin_product.php" class="nav-link">📦 จัดการสินค้า</a></li>
            <li class="nav-item"><a href="admin_orders.php" class="nav-link">📋 รายการสั่งซื้อ</a></li>
            <li class="nav-item"><a href="manual.php" class="nav-link" target="_blank">📖 คู่มือการใช้งาน</a></li>
            <li class="nav-item"><a href="index.php" class="nav-link">🌐 หน้าร้านค้า</a></li>
        </ul>

        <div style="margin-top: auto; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1);">
            <p style="font-size: 13px; color: rgba(255,255,255,0.5);">ผู้ขาย:</p>
            <p style="font-weight: 600; font-size: 14px; color: white; margin-bottom: 12px;"><?= htmlspecialchars($user['fullname'] ?? $user['username']) ?></p>
            <a href="logout.php" style="color: #fc8181; text-decoration: none; font-size: 13px; font-weight: 600;">🚪 ออกจากระบบ</a>
        </div>
    </aside>

    <main class="main-content">
        <div class="top-bar">
            <div>
                <h1 class="page-title">แดชบอร์ดผู้ขาย (Seller Dashboard)</h1>
                <p style="color: #718096; font-size: 14px;">ยินดีต้อนรับคุณ <?= htmlspecialchars($user['fullname']) ?></p>
            </div>
            <div>
                <a href="admin_product.php" class="btn-action">+ เพิ่มสินค้าใหม่</a>
            </div>
        </div>

        <div class="stats-grid">
            <div class="stat-card">
                <div>
                    <div class="stat-lbl">ยอดขายรวม</div>
                    <div class="stat-val">฿<?= number_format($totalSales, 2) ?></div>
                </div>
                <div class="stat-icon">💰</div>
            </div>

            <div class="stat-card">
                <div>
                    <div class="stat-lbl">จำนวนคำสั่งซื้อ</div>
                    <div class="stat-val"><?= number_format($totalOrders) ?></div>
                </div>
                <div class="stat-icon">📦</div>
            </div>

            <div class="stat-card">
                <div>
                    <div class="stat-lbl">รายการสินค้าในร้าน</div>
                    <div class="stat-val"><?= number_format($totalProducts) ?></div>
                </div>
                <div class="stat-icon">👗</div>
            </div>
        </div>

        <div class="table-card">
            <div class="table-header">
                <h2 style="font-size: 18px; font-weight: 700;">คำสั่งซื้อล่าสุด</h2>
                <a href="admin_orders.php" style="color: var(--primary); text-decoration: none; font-size: 14px; font-weight: 600;">ดูทั้งหมด →</a>
            </div>

            <table>
                <thead>
                    <tr>
                        <th>รหัสสั่งซื้อ</th>
                        <th>ชื่อลูกค้า</th>
                        <th>ยอดรวม</th>
                        <th>สถานะ</th>
                        <th>วันที่สั่งซื้อ</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (empty($latestOrders)): ?>
                        <tr><td colspan="5" style="text-align: center; color: #a0aec0;">ยังไม่มีรายการสั่งซื้อ</td></tr>
                    <?php else: ?>
                        <?php foreach ($latestOrders as $ord): ?>
                            <tr>
                                <td>#ORD-<?= str_pad($ord['id'], 5, '0', STR_PAD_LEFT) ?></td>
                                <td><?= htmlspecialchars($ord['customer_name']) ?></td>
                                <td><strong>฿<?= number_format($ord['total_amount'], 2) ?></strong></td>
                                <td>
                                    <span class="badge-status badge-<?= $ord['status'] ?>">
                                        <?= $ord['status'] ?>
                                    </span>
                                </td>
                                <td><?= date('d/m/Y H:i', strtotime($ord['created_at'])) ?></td>
                            </tr>
                        <?php endforeach; ?>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
    </main>

</body>
</html>
