<?php
require_once 'db/config.php';
include 'includes/header.php';

$pdo = db();
$stmt = $pdo->query('SELECT * FROM challenges ORDER BY RAND() LIMIT 3');
$featured_challenges = $stmt->fetchAll();
?>

<div class="container-fluid hero-section text-white text-center py-5">
    <h1 class="display-4 fw-bold">Welcome to RS Learning Lab</h1>
    <p class="fs-5">Your platform for coding challenges, competitions, and certificates.</p>
    <div class="d-flex justify-content-center gap-4 mt-4">
        <div class="text-center">
            <i class="bi bi-code-slash fs-1"></i>
            <p class="mb-0">Challenges</p>
        </div>
        <div class="text-center">
            <i class="bi bi-trophy fs-1"></i>
            <p class="mb-0">Competitions</p>
        </div>
        <div class="text-center">
            <i class="bi bi-patch-check fs-1"></i>
            <p class="mb-0">Certificates</p>
        </div>
    </div>
    <a href="challenges.php" class="btn btn-light btn-lg mt-4">Browse Challenges</a>
</div>

<div class="container py-5">
    <h2 class="text-center mb-4">Featured Challenges</h2>
    <div class="row">
        <?php foreach ($featured_challenges as $challenge): ?>
            <div class="col-md-4">
                <div class="card h-100">
                    <div class="card-body d-flex flex-column">
                        <h5 class="card-title"><?php echo htmlspecialchars($challenge['title']); ?></h5>
                        <p class="card-text flex-grow-1"><?php echo htmlspecialchars(substr($challenge['description'], 0, 100)); ?>...</p>
                        <a href="challenge.php?id=<?php echo $challenge['id']; ?>" class="btn btn-primary mt-auto">View Challenge</a>
                    </div>
                </div>
            </div>
        <?php endforeach; ?>
    </div>
</div>

<?php include 'includes/footer.php'; ?>