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<?php
/**
 * Web Crawler & Previewer - Enhanced Version
 */

// --- KONFIGURASI ---
define('DB_FILE', 'crawler_data.db');
define('PAGESPEED_API_KEY', 'YOUR_GOOGLE_API_KEY'); 
define('HUGGINGFACE_TOKEN', 'YOUR_HF_TOKEN');       
define('SCREENSHOT_DIR', 'screenshots/');

if (!is_dir(SCREENSHOT_DIR)) mkdir(SCREENSHOT_DIR, 0777, true);

// --- DATABASE ---
$db = new PDO('sqlite:' . DB_FILE);
$db->exec("CREATE TABLE IF NOT EXISTS sites (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    url TEXT UNIQUE,
    title TEXT,
    description TEXT,
    server_info TEXT,
    response_time TEXT,
    screenshot_path TEXT,
    ai_description TEXT,
    last_crawl DATETIME
)");

// --- FUNGSI TAMBAHAN: INFO WEBSITE ---
function getWebsiteInfo($url) {
    $start = microtime(true);
    $header = @get_headers($url, 1);
    $end = microtime(true);
    
    $ip = gethostbyname(parse_url($url, PHP_URL_HOST));
    $responseTime = round(($end - $start) * 1000) . "ms";
    $server = $header['Server'] ?? 'Unknown';
    
    return ['ip' => $ip, 'speed' => $responseTime, 'server' => (is_array($server) ? $server[0] : $server)];
}

// --- FUNGSI CORE (Metadata, Screenshot, AI) ---
function getMetadata($url) {
    $options = ['http' => ['user_agent' => 'Mozilla/5.0']];
    $context = stream_context_create($options);
    $html = @file_get_contents($url, false, $context);
    if (!$html) return ['title' => 'N/A', 'desc' => 'N/A'];
    $doc = new DOMDocument();
    @$doc->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
    $xpath = new DOMXPath($doc);
    return [
        'title' => trim($xpath->query('//title')->item(0)->nodeValue ?? 'No Title'),
        'desc' => trim($xpath->query('//meta[@name="description"]/@content')->item(0)->nodeValue ?? 'Tidak ada meta deskripsi.')
    ];
}

function captureScreenshot($url) {
    $api_url = "https://googleapis.com" . urlencode($url) . "&screenshot=true&key=" . PAGESPEED_API_KEY;
    $data = json_decode(@file_get_contents($api_url), true);
    if (isset($data['lighthouseResult']['audits']['final-screenshot']['details']['data'])) {
        $img_data = base64_decode(str_replace(['data:image/jpeg;base64,', 'data:image/png;base64,'], '', $data['lighthouseResult']['audits']['final-screenshot']['details']['data']));
        $filename = SCREENSHOT_DIR . md5($url) . '.jpg';
        file_put_contents($filename, $img_data);
        return $filename;
    }
    return null;
}

function getAIDescription($imagePath) {
    if (!file_exists($imagePath)) return "Gagal menganalisis visual.";
    $data = file_get_contents($imagePath);
    $ch = curl_init("https://huggingface.co");
    curl_setopt($ch, CURLOPT_HTTPHEADER, ["Authorization: Bearer " . HUGGINGFACE_TOKEN]);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = json_decode(curl_exec($ch), true);
    curl_close($ch);
    return $result[0]['generated_text'] ?? "AI belum memberikan deskripsi.";
}

// --- LOGIKA JALANKAN CRAWLER ---
if (isset($_GET['run_crawler'])) {
    $targets = ['https://detik.com', 'https://wikipedia.org']; // Contoh target
    foreach ($targets as $url) {
        $meta = getMetadata($url);
        $info = getWebsiteInfo($url);
        $screenshot = captureScreenshot($url);
        $ai_desc = ($screenshot) ? getAIDescription($screenshot) : "No Image";
        
        $stmt = $db->prepare("INSERT OR REPLACE INTO sites (url, title, description, server_info, response_time, screenshot_path, ai_description, last_crawl) VALUES (?, ?, ?, ?, ?, ?, ?, ?)");
        $stmt->execute([$url, $meta['title'], $meta['desc'], $info['server'] . " (IP: ".$info['ip'].")", $info['speed'], $screenshot, $ai_desc, date('Y-m-d H:i:s')]);
    }
    header("Location: " . strtok($_SERVER["REQUEST_URI"], '?'));
    exit;
}

$sites = $db->query("SELECT * FROM sites ORDER BY last_crawl DESC")->fetchAll(PDO::FETCH_ASSOC);
?>

<!DOCTYPE html>
<html lang="id">
<head>
    <meta charset="UTF-8">
    <title>AI Web Explorer</title>
    <link href="https://jsdelivr.net" rel="stylesheet">
    <style>
        body { background-color: #f4f7f6; }
        .card { border: none; border-radius: 15px; overflow: hidden; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
        .preview-img { height: 180px; object-fit: cover; }
        .info-label { font-size: 0.75rem; text-transform: uppercase; color: #888; font-weight: bold; margin-bottom: 2px; }
        .info-value { font-size: 0.85rem; color: #333; margin-bottom: 10px; }
        .ai-section { background: #f0f3ff; border-left: 4px solid #4338ca; padding: 10px; margin-top: 15px; border-radius: 0 8px 8px 0; }
    </style>
</head>
<body>
    <div class="container py-5">
        <div class="d-flex justify-content-between align-items-center mb-5">
            <h1>🌐 Web Insight <span class="badge bg-dark">v2.0</span></h1>
            <a href="?run_crawler=1" class="btn btn-primary shadow">Jalankan Scan Baru</a>
        </div>

<div class="row g-4">
            <?php foreach ($sites as $site): ?>
            <div class="col-md-6 col-lg-4">
                <div class="card h-100 p-3">
                    <img src="<?= $site['screenshot_path'] ?: 'https://placeholder.com' ?>" class="rounded mb-3 preview-img" alt="Screenshot">
                    
                    
                    <h5 class="fw-bold mb-1 text-truncate"><?= htmlspecialchars($site['title']) ?></h5>
                    <p class="text-primary small mb-3 text-truncate"><?= htmlspecialchars($site['url']) ?></p>

<div class="info-label">Meta Description</div>
                    <p class="info-value fst-italic">"<?= htmlspecialchars($site['description']) ?>"</p>

<div class="row">
                        <div class="col-6">
                            <div class="info-label">Server Info</div>
                            <div class="info-value small"><?= htmlspecialchars($site['server_info']) ?></div>
                        </div>
                        <div class="col-6">
                            <div class="info-label">Response Time</div>
                            <div class="info-value small text-success"><?= htmlspecialchars($site['response_time']) ?></div>
                        </div>
                    </div>

<div class="ai-section">
                        <div class="info-label text-primary">AI Visual Analysis</div>
                        <div class="info-value mb-0 fw-medium"><?= htmlspecialchars($site['ai_description']) ?></div>
                    </div>

<div class="mt-auto pt-3 border-top text-muted small">
                        Terakhir diperbarui: <?= $site['last_crawl'] ?>
                    </div>
                </div>
            </div>
            <?php endforeach; ?>
        </div>
    </div>
</body>
</html>

<?php
/**
 * Web Crawler & Previewer - Enhanced Version
 */

if (!is_dir(SCREENSHOT_DIR)) mkdir(SCREENSHOT_DIR, 0777, true);

$sites = $db->query("SELECT * FROM sites ORDER BY last_crawl DESC")->fetchAll(PDO::FETCH_ASSOC);
?>

<div class="info-label">Meta Description</div>
                    <p class="info-value fst-italic">"<?= htmlspecialchars($site['description']) ?>"</p>