<?php
require_once(__DIR__ . "/../config/db.php");

$stmt = $pdo->query("
    SELECT student_name, class, MAX(score) as best_score
    FROM project_submissions
    WHERE status='approved'
    GROUP BY student_id
    ORDER BY best_score DESC
    LIMIT 10
");

$students = $stmt->fetchAll();
?>

<!DOCTYPE html>
<html>
<head>
<title>Leaderboard | RS Learning Lab</title>
<style>
body{
background:#020617;
color:#fff;
font-family:Arial;
text-align:center;
}
table{
margin:50px auto;
border-collapse:collapse;
width:60%;
}
th, td{
padding:12px;
border-bottom:1px solid #444;
}
th{
color:#22c55e;
}
.rank{
font-weight:bold;
color:#facc15;
}
</style>
</head>
<body>

<h1>🏆 Leaderboard</h1>

<table>
<tr>
<th>Rank</th>
<th>Name</th>
<th>Class</th>
<th>Score</th>
</tr>

<?php $rank=1; foreach($students as $s): ?>
<tr>
<td class="rank"><?= $rank++ ?></td>
<td><?= htmlspecialchars($s['student_name']) ?></td>
<td><?= htmlspecialchars($s['class']) ?></td>
<td><?= $s['best_score'] ?></td>
</tr>
<?php endforeach; ?>

</table>

</body>
</html>