<?php
// PHP Backend API Handler voor AJAX interacties
if (isset($_GET['action'])) {
    header('Content-Type: application/json; charset=utf-8');
/**
 * Web & PC Studio - Dev Lab & Webserver Performance Suite
 * Uitgebreide diagnostics & benchmark suite voor webserver capaciteit en doorvoersnelheid.
 */

// Helper functies voor benchmarks
function benchmarkCPU() {
    $start = microtime(true);
    $iterations = 80000;
    
    if ($_GET['action'] === 'benchmark') {
        $iterations = 75000;
        $start = microtime(true);
        $memStart = memory_get_usage();
    $val = 1.0;
    for ($i = 1; $i <= $iterations; $i++) {
        $val = sqrt($val + $i) * sin($i);
    }
    
    $hash = 'webenpcstudio';
    for ($i = 0; $i < 40000; $i++) {
        $hash = hash('sha256', $hash . $i);
    }
    
    $duration = (microtime(true) - $start) * 1000;
    $ops = round(($iterations + 40000) / (max(0.001, $duration) / 1000));
    
    return [
        'status' => 'success',
        'duration_ms' => round($duration, 2),
        'ops_per_sec' => number_format($ops, 0, ',', '.'),
        'raw_ops' => $ops
    ];
}

        // Rekenkundige en hashing benchmark
        $hash = 'webenpcstudio';
        for ($i = 0; $i < $iterations; $i++) {
            $hash = hash('sha256', $hash . $i);
function benchmarkMemory() {
    $start = microtime(true);
    $startMem = memory_get_usage();
    
    $arr = [];
    for ($i = 0; $i < 50000; $i++) {
        $arr['key_' . $i] = [
            'id' => $i,
            'val' => $i * 1.5,
            'studio' => 'WebenPCStudio'
        ];
    }
    
    ksort($arr);
    $serialized = serialize($arr);
    $unserialized = unserialize($serialized);
    unset($arr, $serialized, $unserialized);
    
    $duration = (microtime(true) - $start) * 1000;
    $peakMem = (memory_get_peak_usage() - $startMem) / (1024 * 1024);
    $throughput = round(150000 / (max(0.001, $duration) / 1000));
    
    return [
        'status' => 'success',
        'duration_ms' => round($duration, 2),
        'peak_mem_mb' => round(max(0.1, $peakMem), 2),
        'ops_per_sec' => number_format($throughput, 0, ',', '.'),
        'raw_ops' => $throughput
    ];
}

function benchmarkDiskIO() {
    $tempDir = sys_get_temp_dir();
    $tempFile = tempnam($tempDir, 'wpc_bench_');
    if (!$tempFile) {
        return ['status' => 'error', 'message' => 'Kan tijdelijk bestand niet aanmaken'];
    }
    
    $chunkSize = 64 * 1024; // 64 KB
    $chunks = 48; // ~3 MB totaal
    $dummyData = str_repeat('WPCStudio2026_TEST_STRING_ABCD!', 2048); // 64 KB
    
    // Write test
    $writeStart = microtime(true);
    $fp = fopen($tempFile, 'wb');
    if (!$fp) {
        @unlink($tempFile);
        return ['status' => 'error', 'message' => 'Kan bestand niet openen'];
    }
    for ($i = 0; $i < $chunks; $i++) {
        fwrite($fp, $dummyData);
    }
    fflush($fp);
    fclose($fp);
    $writeTime = max(0.0005, microtime(true) - $writeStart);
    
    // Read test
    $readStart = microtime(true);
    $fp = fopen($tempFile, 'rb');
    if ($fp) {
        while (!feof($fp)) {
            fread($fp, $chunkSize);
        }
        fclose($fp);
    }
    $readTime = max(0.0005, microtime(true) - $readStart);
    
    $totalMB = ($chunks * $chunkSize) / (1024 * 1024);
    $writeSpeed = round($totalMB / $writeTime, 1);
    $readSpeed = round($totalMB / $readTime, 1);
    
    @unlink($tempFile);
    
    return [
        'status' => 'success',
        'file_size_mb' => round($totalMB, 2),
        'write_speed_mb_s' => $writeSpeed,
        'read_speed_mb_s' => $readSpeed,
        'write_time_ms' => round($writeTime * 1000, 1),
        'read_time_ms' => round($readTime * 1000, 1)
    ];
}

        $duration = (microtime(true) - $start) * 1000; // in milliseconden
        $memPeak = memory_get_peak_usage() / (1024 * 1024); // MB
        $opsPerSec = round($iterations / ($duration / 1000));
function benchmarkStringJSON() {
    $start = microtime(true);
    $data = [];
    for ($i = 0; $i < 15000; $i++) {
        $data[] = [
            'id' => $i,
            'email' => "user{$i}@webenpcstudio.nl",
            'tags' => ['git', 'php', 'speed', 'server'],
            'active' => ($i % 2 === 0)
        ];
    }
    $json = json_encode($data);
    $decoded = json_decode($json, true);
    
    preg_match_all('/[a-zA-Z0-9._%+-]+@webenpcstudio\.nl/', $json, $matches);
    
    $duration = (microtime(true) - $start) * 1000;
    $throughput = round(15000 / (max(0.001, $duration) / 1000));
    
    return [
        'status' => 'success',
        'duration_ms' => round($duration, 2),
        'records_per_sec' => number_format($throughput, 0, ',', '.'),
        'json_size_kb' => round(strlen($json) / 1024, 1),
        'raw_ops' => $throughput
    ];
}

        echo json_encode([
function benchmarkDatabase() {
    if (!extension_loaded('pdo_sqlite')) {
        return [
            'status' => 'skipped',
            'message' => 'PDO SQLite niet beschikbaar',
            'tps' => 0,
            'duration_ms' => 0
        ];
    }
    try {
        $start = microtime(true);
        $pdo = new PDO('sqlite::memory:');
        $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $pdo->exec('CREATE TABLE test (id INTEGER PRIMARY KEY, name TEXT, val REAL)');
        
        $pdo->beginTransaction();
        $stmt = $pdo->prepare('INSERT INTO test (name, val) VALUES (?, ?)');
        for ($i = 0; $i < 2500; $i++) {
            $stmt->execute(['item_' . $i, mt_rand(1, 1000) / 10]);
        }
        $pdo->commit();
        
        $stmt2 = $pdo->query('SELECT AVG(val), COUNT(*) FROM test WHERE val > 500');
        $stmt2->fetch();
        
        $duration = (microtime(true) - $start) * 1000;
        $tps = round(2500 / (max(0.001, $duration) / 1000));
        
        return [
            'status' => 'success',
            'iterations' => number_format($iterations, 0, ',', '.'),
            'duration_ms' => round($duration, 2),
            'ops_per_sec' => number_format($opsPerSec, 0, ',', '.'),
            'peak_memory' => round($memPeak, 2) . ' MB',
            'php_version' => PHP_VERSION,
            'final_hash' => substr($hash, 0, 16) . '...'
            'tps' => number_format($tps, 0, ',', '.'),
            'records' => 2500,
            'raw_tps' => $tps
        ];
    } catch (Exception $e) {
        return [
            'status' => 'error',
            'message' => $e->getMessage()
        ];
    }
}

function getOpcacheInfo() {
    if (function_exists('opcache_get_status') && ($status = @opcache_get_status(false))) {
        $mem = $status['memory_usage'] ?? [];
        return [
            'enabled' => true,
            'used_mb' => round(($mem['used_memory'] ?? 0) / (1024 * 1024), 1),
            'free_mb' => round(($mem['free_memory'] ?? 0) / (1024 * 1024), 1),
            'hit_rate' => round($status['opcache_statistics']['opcache_hit_rate'] ?? 0, 1) . '%',
            'jit' => !empty($status['jit']['enabled']) ? 'Actief' : 'Inactief'
        ];
    }
    return [
        'enabled' => false,
        'message' => 'Niet geactiveerd'
    ];
}

// ==========================================
// API Routing voor AJAX Verzoeken
// ==========================================
if (isset($_GET['action'])) {
    header('Content-Type: application/json; charset=utf-8');

    // 1. Snelle Ping
    if ($_GET['action'] === 'ping') {
        echo json_encode([
            'status' => 'pong',
            'timestamp' => microtime(true),
            'server_time' => date('H:i:s.u')
        ]);
        exit;
    }

    if ($_GET['action'] === 'hash' && isset($_POST['text'])) {
        $input = (string)$_POST['text'];
    // 2. Afzonderlijke Benchmark Acties
    if ($_GET['action'] === 'bench_cpu') {
        echo json_encode(benchmarkCPU());
        exit;
    }
    if ($_GET['action'] === 'bench_memory') {
        echo json_encode(benchmarkMemory());
        exit;
    }
    if ($_GET['action'] === 'bench_disk') {
        echo json_encode(benchmarkDiskIO());
        exit;
    }
    if ($_GET['action'] === 'bench_string') {
        echo json_encode(benchmarkStringJSON());
        exit;
    }
    if ($_GET['action'] === 'bench_db') {
        echo json_encode(benchmarkDatabase());
        exit;
    }

    // 3. Volledige Server Benchmark Suite
    if ($_GET['action'] === 'bench_all') {
        $cpu = benchmarkCPU();
        $mem = benchmarkMemory();
        $disk = benchmarkDiskIO();
        $str = benchmarkStringJSON();
        $db = benchmarkDatabase();
        $opcache = getOpcacheInfo();

        // Bereken gewogen Server Score (0-100)
        $score = 0;
        
        // CPU Score (max 25)
        $cpuOps = $cpu['raw_ops'] ?? 0;
        $score += min(25, round(($cpuOps / 150000) * 25));

        // Memory Score (max 20)
        $memOps = $mem['raw_ops'] ?? 0;
        $score += min(20, round(($memOps / 200000) * 20));

        // Disk Score (max 25)
        $writeSpd = $disk['write_speed_mb_s'] ?? 0;
        $score += min(25, round(($writeSpd / 300) * 25));

        // String/JSON Score (max 15)
        $strOps = $str['raw_ops'] ?? 0;
        $score += min(15, round(($strOps / 35000) * 15));

        // DB / OPcache Score (max 15)
        if ($db['status'] === 'success') {
            $dbTps = $db['raw_tps'] ?? 0;
            $score += min(15, round(($dbTps / 20000) * 15));
        } else {
            $score += ($opcache['enabled'] ? 12 : 8);
        }

        $finalScore = max(35, min(100, $score));

        // Grade toekenning
        if ($finalScore >= 90) {
            $grade = 'A+';
            $rating = 'Superieur (Enterprise Snelheid)';
            $color = '#34d399';
        } elseif ($finalScore >= 80) {
            $grade = 'A';
            $rating = 'Uitstekend (Zeer Snelle Server)';
            $color = '#38bdf8';
        } elseif ($finalScore >= 70) {
            $grade = 'B';
            $rating = 'Goed (Solide Hosting)';
            $color = '#fbbf24';
        } else {
            $grade = 'C';
            $rating = 'Voldoende (Basis Hosting)';
            $color = '#f87171';
        }

        echo json_encode([
            'status' => 'success',
            'md5' => md5($input),
            'sha256' => hash('sha256', $input),
            'base64' => base64_encode($input),
            'length' => mb_strlen($input)
            'score' => $finalScore,
            'grade' => $grade,
            'rating' => $rating,
            'color' => $color,
            'cpu' => $cpu,
            'memory' => $mem,
            'disk' => $disk,
            'string_json' => $str,
            'db' => $db,
            'opcache' => $opcache,
            'timestamp' => date('d-m-Y H:i:s')
        ]);
        exit;
    }

    echo json_encode(['status' => 'error', 'message' => 'Onbekende actie']);
    // 4. Server Specificaties & Audit
    if ($_GET['action'] === 'server_specs') {
        echo json_encode([
            'php_version' => PHP_VERSION,
            'sapi' => php_sapi_name(),
            'os' => PHP_OS_FAMILY . ' (' . PHP_OS . ')',
            'architecture' => (PHP_INT_SIZE * 8) . '-bit',
            'memory_limit' => ini_get('memory_limit'),
            'max_execution_time' => ini_get('max_execution_time') . 's',
            'upload_max_filesize' => ini_get('upload_max_filesize'),
            'post_max_size' => ini_get('post_max_size'),
            'opcache' => getOpcacheInfo(),
            'server_software' => $_SERVER['SERVER_SOFTWARE'] ?? 'Onbekend',
            'extensions' => [
                'curl' => extension_loaded('curl'),
                'openssl' => extension_loaded('openssl'),
                'pdo_mysql' => extension_loaded('pdo_mysql'),
                'pdo_sqlite' => extension_loaded('pdo_sqlite'),
                'mbstring' => extension_loaded('mbstring'),
                'gd' => extension_loaded('gd'),
                'zip' => extension_loaded('zip')
            ]
        ]);
        exit;
    }

    echo json_encode(['status' => 'error', 'message' => 'Onbekend verzoek']);
    exit;
}

date_default_timezone_set('Europe/Amsterdam');
$serverTime = date('H:i:s');
$phpVersion = PHP_VERSION;
$serverSoftware = $_SERVER['SERVER_SOFTWARE'] ?? 'Apache / Nginx';
?>
<!DOCTYPE html>
<html lang="nl">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Web & PC Studio - Interactive Dev Lab</title>
    <title>Web &amp; PC Studio - Webserver Benchmark &amp; Dev Lab</title>
    <style>
        :root {
            --primary: #06b6d4;
            --primary-glow: rgba(6, 182, 212, 0.4);
            --primary-hover: #0891b2;
            --primary-glow: rgba(6, 182, 212, 0.35);
            --accent: #8b5cf6;
            --accent-glow: rgba(139, 92, 246, 0.35);
            --success: #10b981;
            --bg: #07090e;
            --panel-bg: rgba(15, 23, 42, 0.75);
            --border: rgba(255, 255, 255, 0.1);
            --success-glow: rgba(16, 185, 129, 0.3);
            --warning: #f59e0b;
            --danger: #ef4444;
            --bg: #060911;
            --panel-bg: rgba(15, 23, 42, 0.78);
            --border: rgba(255, 255, 255, 0.08);
            --text: #f1f5f9;
            --text-muted: #94a3b8;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            min-height: 100vh;
            padding: 24px 16px 60px;
            overflow-x: hidden;
            position: relative;
            background-image: 
                radial-gradient(at 0% 0%, rgba(6, 182, 212, 0.15) 0px, transparent 50%),
                radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
        }

        /* Canvas Particle Network Achtergrond */
        #particle-canvas {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            z-index: 0;
            pointer-events: none;
        }

        .layout {
        .main-wrapper {
            max-width: 1050px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
            max-width: 1050px;
            margin: 0 auto;
            padding: 32px 20px 60px;
        }

        /* Top navigatiebalk */
        .top-nav {
        /* Top Menu Balk */
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: rgba(15, 23, 42, 0.8);
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border);
            border-radius: 16px;
            border-radius: 18px;
            padding: 12px 24px;
            margin-bottom: 30px;
            margin-bottom: 28px;
            box-shadow: 0 10px 25px -5px rgba(0,0,0,0.3);
        }

        .logo-area {
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: white;
        }

        .logo-badge {
        .nav-logo {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            width: 38px;
            height: 38px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 14px var(--primary-glow);
            font-weight: bold;
            font-size: 1.1rem;
            color: white;
            box-shadow: 0 4px 12px var(--primary-glow);
        }

        .nav-links {
        .nav-title {
            font-size: 1.05rem;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 14px;
            gap: 8px;
            background: rgba(0, 0, 0, 0.25);
            padding: 4px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.04);
        }

        .btn-link {
        .nav-item {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 0.9rem;
            font-weight: 500;
            font-size: 0.88rem;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 10px;
            border-radius: 8px;
            transition: all 0.2s ease;
            display: inline-flex;
            display: flex;
            align-items: center;
            gap: 6px;
            border: 1px solid transparent;
        }

        .btn-link:hover {
        .nav-item:hover {
            color: white;
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.1);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-item.active {
            background: rgba(6, 182, 212, 0.2);
            color: #ffffff;
            border: 1px solid rgba(6, 182, 212, 0.4);
        }

        .nav-controls {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .sound-toggle {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-muted);
            padding: 8px 12px;
            padding: 6px 12px;
            border-radius: 10px;
            cursor: pointer;
            font-size: 0.85rem;
            font-size: 0.82rem;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: 0.2s;
        }

        .sound-toggle.active {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(6, 182, 212, 0.1);
            background: rgba(6, 182, 212, 0.12);
        }

        /* Hero Sectie */
        @media (max-width: 820px) {
            .navbar { flex-direction: column; gap: 14px; }
            .nav-menu { width: 100%; justify-content: center; flex-wrap: wrap; }
        }

        /* Hero Banner */
        .hero {
            text-align: center;
            margin-bottom: 36px;
            margin-bottom: 32px;
        }

        .hero h1 {
            font-size: 2.3rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            background: linear-gradient(to right, #38bdf8, #818cf8, #c084fc);
            background: linear-gradient(to right, #38bdf8, #818cf8, #34d399);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 10px;
        }

        .hero p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 620px;
            font-size: 1.02rem;
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.5;
        }

        /* Grid Layout voor Widgets */
        .grid {
        /* Benchmark Master Banner */
        .bench-master {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(11, 15, 25, 0.95));
            border: 1px solid rgba(6, 182, 212, 0.3);
            border-radius: 22px;
            padding: 28px 32px;
            margin-bottom: 32px;
            box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
        }

        .bench-master-left {
            flex: 1;
            min-width: 280px;
        }

        .bench-master-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .bench-master-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 20px;
        }

        .btn-run-all {
            background: linear-gradient(135deg, var(--primary), #0284c7);
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            box-shadow: 0 4px 18px var(--primary-glow);
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-run-all:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px var(--primary-glow);
            filter: brightness(1.1);
        }

        .btn-run-all:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        /* Score Gauge */
        .score-box {
            display: flex;
            align-items: center;
            gap: 20px;
            background: rgba(0, 0, 0, 0.4);
            border: 1px solid var(--border);
            padding: 20px 24px;
            border-radius: 18px;
        }

        .score-circle {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            border: 4px solid #38bdf8;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(56, 189, 248, 0.25);
            font-weight: 800;
        }

        .score-val {
            font-size: 1.5rem;
            color: #fff;
            line-height: 1;
        }

        .score-max {
            font-size: 0.65rem;
            color: var(--text-muted);
        }

        .score-details {
            text-align: left;
        }

        .score-grade {
            font-size: 1.4rem;
            font-weight: 800;
            color: #38bdf8;
        }

        .score-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Voortgangsbalk */
        .progress-bar-wrap {
            width: 100%;
            height: 6px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 999px;
            margin-top: 18px;
            overflow: hidden;
            display: none;
        }

        .progress-bar-fill {
            height: 100%;
            width: 0%;
            background: linear-gradient(to right, var(--primary), var(--accent));
            transition: width 0.3s ease;
        }

        /* Widgets Grid */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
            gap: 20px;
            margin-bottom: 28px;
        }

        .panel {
        .card {
            background: var(--panel-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 26px;
            border-radius: 18px;
            padding: 22px;
            display: flex;
            flex-direction: column;
            transition: transform 0.2s ease, border-color 0.2s ease;
            transition: all 0.2s ease;
        }

        .panel:hover {
            border-color: rgba(255, 255, 255, 0.2);
        .card:hover {
            border-color: rgba(255, 255, 255, 0.18);
            transform: translateY(-2px);
        }

        .panel-header {
        .card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 18px;
            margin-bottom: 14px;
        }

        .panel-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 600;
        .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
        }

        .panel-icon {
            font-size: 1.25rem;
        }

        /* Knoppen & Interactie */
        .btn-action {
            background: linear-gradient(135deg, var(--primary), #0284c7);
            color: #fff;
            border: none;
            padding: 12px 20px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            box-shadow: 0 4px 14px var(--primary-glow);
            transition: all 0.2s ease;
            width: 100%;
        }

        .btn-action:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 20px var(--primary-glow);
            filter: brightness(1.1);
        .badge-pill {
            background: rgba(6, 182, 212, 0.12);
            color: var(--primary);
            border: 1px solid rgba(6, 182, 212, 0.3);
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .btn-action:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        .card-desc {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.4;
            margin-bottom: 16px;
        }

        /* Benchmark Output */
        .bench-metrics {
        /* Metrics Display */
        .metrics-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 16px;
            gap: 10px;
            margin-bottom: 16px;
        }

        .metric-card {
            background: rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 12px 14px;
        .metric-box {
            background: rgba(0, 0, 0, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.04);
            border-radius: 10px;
            padding: 10px 12px;
        }

        .metric-title {
            font-size: 0.75rem;
        .metric-name {
            font-size: 0.72rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 4px;
            letter-spacing: 0.04em;
            margin-bottom: 2px;
        }

        .metric-val {
        .metric-number {
            font-family: ui-monospace, SFMono-Regular, monospace;
            font-size: 1.1rem;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            color: #38bdf8;
        }

        /* Latency Real-time Canvas Graph */
        #ping-chart {
        .btn-test-mini {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text);
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            width: 100%;
            height: 110px;
            background: rgba(0, 0, 0, 0.4);
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            margin: 14px 0;
            display: block;
            margin-top: auto;
        }

        /* Crypto Transformer Inputs */
        .text-input {
            width: 100%;
            background: rgba(0, 0, 0, 0.35);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 10px 14px;
            color: white;
            font-size: 0.9rem;
            margin-bottom: 12px;
            outline: none;
            transition: border-color 0.2s;
        .btn-test-mini:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .text-input:focus {
            border-color: var(--primary);
        /* Concurrency Box */
        .concurrency-box {
            background: var(--panel-bg);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 24px;
            margin-bottom: 28px;
        }

        .crypto-row {
            background: rgba(0, 0, 0, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            padding: 8px 12px;
            margin-bottom: 8px;
        .conc-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            margin-bottom: 16px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .crypto-type {
        .conc-buttons {
            display: flex;
            gap: 8px;
        }

        .btn-conc-option {
            background: rgba(0, 0, 0, 0.4);
            border: 1px solid var(--border);
            color: var(--text-muted);
            padding: 6px 14px;
            border-radius: 8px;
            font-size: 0.84rem;
            font-weight: 600;
            width: 60px;
            cursor: pointer;
            transition: 0.2s;
        }

        .crypto-res {
            font-family: ui-monospace, SFMono-Regular, monospace;
            color: #38bdf8;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 200px;
        .btn-conc-option.active {
            background: rgba(139, 92, 246, 0.25);
            color: #fff;
            border-color: rgba(139, 92, 246, 0.5);
        }

        .btn-copy-mini {
            background: rgba(255, 255, 255, 0.08);
            border: none;
            color: var(--text-muted);
        .conc-visualizer {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin: 16px 0;
            min-height: 38px;
            align-items: center;
        }

        .conc-pill {
            background: rgba(15, 23, 42, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 6px;
            padding: 4px 8px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 0.75rem;
            transition: 0.2s;
            font-family: ui-monospace, SFMono-Regular, monospace;
            animation: fadeIn 0.2s ease;
        }

        .btn-copy-mini:hover {
            color: white;
            background: rgba(255, 255, 255, 0.15);
        .conc-pill.success { border-color: #10b981; color: #34d399; }
        .conc-pill.slow { border-color: #f59e0b; color: #fbbf24; }
        .conc-pill.error { border-color: #ef4444; color: #f87171; }

        /* Server Specs Table */
        .specs-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.84rem;
        }

        /* Spec list */
        .spec-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
        .specs-table td {
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.86rem;
        }

        .spec-item:last-child {
        .specs-table tr:last-child td {
            border-bottom: none;
        }

        .spec-key {
        .spec-label {
            color: var(--text-muted);
        }

        .spec-value {
        .spec-val {
            font-family: ui-monospace, SFMono-Regular, monospace;
            color: var(--text);
            text-align: right;
            font-weight: 500;
        }

        .pill-badge {
            background: rgba(6, 182, 212, 0.12);
            color: var(--primary);
            border: 1px solid rgba(6, 182, 212, 0.3);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 0.78rem;
        .footer {
            text-align: center;
            font-size: 0.84rem;
            color: var(--text-muted);
            opacity: 0.8;
            margin-top: 24px;
        }

        .footer a {
            color: #60a5fa;
            text-decoration: none;
        }

        .footer a:hover {
            text-decoration: underline;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(4px); }
            to { opacity: 1; transform: translateY(0); }
        }
    </style>
</head>
<body>
    <!-- Interactief Canvas achtergrondeffect -->
    <canvas id="particle-canvas"></canvas>

    <div class="layout">
        <!-- Bovenbalk -->
        <header class="top-nav">
            <div class="logo-area">
                <div class="logo-badge">⚡</div>
                <div>
                    <strong style="font-size: 1rem; color: #fff;">Web &amp; PC Studio</strong>
                    <div style="font-size: 0.75rem; color: var(--text-muted);">Dev Lab &bull; v2.0</div>
                </div>
    <div class="main-wrapper">
        <!-- Bovenste Menu Balk (Navigatie) -->
        <nav class="navbar">
            <a href="index.php" class="nav-brand">
                <div class="nav-logo">⚡</div>
                <div class="nav-title">Web &amp; PC Studio</div>
            </a>
            <div class="nav-menu">
                <a href="index.php" class="nav-item">🏠 Home</a>
                <a href="lab.php" class="nav-item active">🧪 Dev Lab</a>
                <a href="services.php" class="nav-item">🛠️ Diensten &amp; Offerte</a>
            </div>
            <nav class="nav-links">
                <a href="index.php" class="btn-link">🏠 Home</a>
                <a href="lab.php" class="btn-link" style="background: rgba(6, 182, 212, 0.2); color: white; border-color: rgba(6, 182, 212, 0.4);">🧪 Dev Lab</a>
                <a href="services.php" class="btn-link">🛠️ Diensten &amp; Offerte</a>
            <div class="nav-controls">
                <button class="sound-toggle" id="sound-btn" onclick="toggleAudio()" title="Schakel geluidseffecten in/uit">
                    <span id="sound-icon">🔈</span> Geluid: <span id="sound-status">Uit</span>
                </button>
            </nav>
        </header>
            </div>
        </nav>

        <!-- Hero -->
        <section class="hero">
            <h1>Interactief Developer Lab</h1>
        <!-- Hero Header -->
        <header class="hero">
            <h1>Webserver Performance Suite</h1>
            <p>
                Geavanceerde demonstratie van server-side PHP computing, asynchrone AJAX communicatie en real-time HTML5 Canvas/Web Audio API rendering.
                Voer diepgaande diagnostische server benchmarks uit om CPU-rekenkracht, Disk I/O schrijf/leessnelheid, geheugenbandbreedte en gelijktijdige request-capaciteit van www.webenpcstudio.nl te meten.
            </p>
        </section>
        </header>

        <!-- Widgets Grid -->
        <main class="grid">
            <!-- Widget 1: PHP CPU & Memory Benchmark -->
            <div class="panel">
                <div class="panel-header">
                    <div class="panel-title">
                        <span class="panel-icon">🚀</span>
                        PHP Server Benchmark
                    </div>
                    <span class="pill-badge">PHP <?= htmlspecialchars($phpVersion); ?></span>
        <!-- Master Benchmark Banner -->
        <div class="bench-master">
            <div class="bench-master-left">
                <div class="bench-master-title">
                    <span>⚡</span> Volledige Webserver Benchmark
                </div>
                <p style="font-size: 0.85rem; color: var(--text-muted); margin-bottom: 16px;">
                    Laat de server 75.000 cryptografische SHA-256 cycli berekenen en meet de execution time &amp; piekgeheugen.
                </p>
                <button class="btn-action" id="bench-btn" onclick="runBenchmark()">
                    <span>▶</span> Start Server Benchmark
                </button>
                <div class="bench-metrics">
                    <div class="metric-card">
                        <div class="metric-title">Executietijd</div>
                        <div class="metric-val" id="m-duration">-- ms</div>
                <div class="bench-master-desc">
                    Test in één geautomatiseerde cyclus de CPU, NVMe/SSD Disk I/O, RAM doorvoer, JSON parsing en in-memory SQLite database.
                </div>
                <div style="display: flex; gap: 12px; align-items: center; flex-wrap: wrap;">
                    <button class="btn-run-all" id="btn-run-all" onclick="runFullBenchmark()">
                        <span>▶</span> Start Volledige Benchmark
                    </button>
                    <button class="btn-test-mini" style="width: auto; padding: 12px 18px;" onclick="copyReport()">
                        📋 Kopieer Rapport
                    </button>
                </div>
                <div class="progress-bar-wrap" id="p-bar-wrap">
                    <div class="progress-bar-fill" id="p-bar-fill"></div>
                </div>
            </div>

            <!-- Score Display -->
            <div class="score-box">
                <div class="score-circle" id="score-circle">
                    <span class="score-val" id="score-num">--</span>
                    <span class="score-max">/ 100</span>
                </div>
                <div class="score-details">
                    <div class="score-grade" id="score-grade">Klaar</div>
                    <div class="score-label" id="score-label">Klik start voor meting</div>
                </div>
            </div>
        </div>

        <!-- 6 Gedetailleerde Test Cards -->
        <div class="grid-3">
            <!-- Test 1: CPU & Cryptografie -->
            <div class="card">
                <div class="card-header">
                    <div class="card-title"><span>🚀</span> CPU &amp; Math</div>
                    <span class="badge-pill">80k Math + 40k SHA</span>
                </div>
                <div class="card-desc">Rekenkundige algoritmes en cryptografische hashing op de webserver CPU.</div>
                <div class="metrics-grid">
                    <div class="metric-box">
                        <div class="metric-name">Bewerkingen / s</div>
                        <div class="metric-number" id="cpu-ops">--</div>
                    </div>
                    <div class="metric-card">
                        <div class="metric-title">Bewerkingen / sec</div>
                        <div class="metric-val" id="m-ops">--</div>
                    <div class="metric-box">
                        <div class="metric-name">Duur</div>
                        <div class="metric-number" id="cpu-time">-- ms</div>
                    </div>
                    <div class="metric-card">
                        <div class="metric-title">Piekgeheugen</div>
                        <div class="metric-val" id="m-mem">-- MB</div>
                </div>
                <button class="btn-test-mini" onclick="runSingleTest('bench_cpu')">▶ Test Alleen CPU</button>
            </div>

            <!-- Test 2: NVMe / Disk I/O -->
            <div class="card">
                <div class="card-header">
                    <div class="card-title"><span>💾</span> Disk I/O Snelheid</div>
                    <span class="badge-pill">3 MB Chunk R/W</span>
                </div>
                <div class="card-desc">Fysieke schrijf- en leessnelheid naar de tijdelijke serveropslag (SSD/NVMe).</div>
                <div class="metrics-grid">
                    <div class="metric-box">
                        <div class="metric-name">Schrijfsnelheid</div>
                        <div class="metric-number" id="disk-write">-- MB/s</div>
                    </div>
                    <div class="metric-card">
                        <div class="metric-title">Iteraties</div>
                        <div class="metric-val" id="m-iters">75.000</div>
                    <div class="metric-box">
                        <div class="metric-name">Leessnelheid</div>
                        <div class="metric-number" id="disk-read">-- MB/s</div>
                    </div>
                </div>
                <button class="btn-test-mini" onclick="runSingleTest('bench_disk')">▶ Test Alleen Disk I/O</button>
            </div>

            <!-- Widget 2: Live Latency Visualizer & Chart -->
            <div class="panel">
                <div class="panel-header">
                    <div class="panel-title">
                        <span class="panel-icon">📈</span>
                        Live Latency Visualizer
            <!-- Test 3: Geheugen & RAM Bandbreedte -->
            <div class="card">
                <div class="card-header">
                    <div class="card-title"><span>🧠</span> RAM Doorvoer</div>
                    <span class="badge-pill">50k Associative Array</span>
                </div>
                <div class="card-desc">Allocatie, manipulatie en serialisatie van complexe datastructuren in het werkgeheugen.</div>
                <div class="metrics-grid">
                    <div class="metric-box">
                        <div class="metric-name">Doorvoer / s</div>
                        <div class="metric-number" id="mem-ops">--</div>
                    </div>
                    <span class="pill-badge" id="avg-ping">Klaar voor test</span>
                    <div class="metric-box">
                        <div class="metric-name">Piekgeheugen</div>
                        <div class="metric-number" id="mem-peak">-- MB</div>
                    </div>
                </div>
                <p style="font-size: 0.85rem; color: var(--text-muted); margin-bottom: 8px;">
                    Meet real-time round-trip latency tussen browser en de Apache/PHP webserver.
                </p>
                <canvas id="ping-chart"></canvas>
                <button class="btn-action" id="ping-btn" onclick="startPingStream()">
                    <span>📡</span> Meet 10x Server Latency
                </button>
                <button class="btn-test-mini" onclick="runSingleTest('bench_memory')">▶ Test Alleen RAM</button>
            </div>

            <!-- Widget 3: Real-time Client Hardware Sensor -->
            <div class="panel">
                <div class="panel-header">
                    <div class="panel-title">
                        <span class="panel-icon">💻</span>
                        Client Hardware &amp; GPU
                    </div>
                    <span class="pill-badge">Client Info</span>
            <!-- Test 4: JSON & String Processing -->
            <div class="card">
                <div class="card-header">
                    <div class="card-title"><span>📦</span> String &amp; JSON</div>
                    <span class="badge-pill">15k JSON Records</span>
                </div>
                <div style="margin-top: 4px;">
                    <div class="spec-item">
                        <span class="spec-key">Grafische kaart (GPU):</span>
                        <span class="spec-value" id="spec-gpu" style="max-width: 170px; text-align: right; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;">Detecteren...</span>
                <div class="card-desc">JSON encoding, decoding en RegEx parsing op gestructureerde data.</div>
                <div class="metrics-grid">
                    <div class="metric-box">
                        <div class="metric-name">Records / s</div>
                        <div class="metric-number" id="str-ops">--</div>
                    </div>
                    <div class="spec-item">
                        <span class="spec-key">CPU Cores / Threads:</span>
                        <span class="spec-value" id="spec-cores">--</span>
                    <div class="metric-box">
                        <div class="metric-name">Payload Omvang</div>
                        <div class="metric-number" id="str-size">-- KB</div>
                    </div>
                    <div class="spec-item">
                        <span class="spec-key">Schermresolutie:</span>
                        <span class="spec-value" id="spec-screen">--</span>
                </div>
                <button class="btn-test-mini" onclick="runSingleTest('bench_string')">▶ Test Alleen String</button>
            </div>

            <!-- Test 5: In-Memory Database -->
            <div class="card">
                <div class="card-header">
                    <div class="card-title"><span>🗄️</span> Database RAM I/O</div>
                    <span class="badge-pill">SQLite :memory:</span>
                </div>
                <div class="card-desc">2.500 transacties met inserts, indexeringen en aggregatiequeries.</div>
                <div class="metrics-grid">
                    <div class="metric-box">
                        <div class="metric-name">Transacties / s</div>
                        <div class="metric-number" id="db-tps">--</div>
                    </div>
                    <div class="spec-item">
                        <span class="spec-key">Verbindingstype:</span>
                        <span class="spec-value" id="spec-net">--</span>
                    <div class="metric-box">
                        <div class="metric-name">Query Tijd</div>
                        <div class="metric-number" id="db-time">-- ms</div>
                    </div>
                    <div class="spec-item">
                        <span class="spec-key">Canvas WebGL Versie:</span>
                        <span class="spec-value" id="spec-webgl">--</span>
                    </div>
                </div>
                <button class="btn-test-mini" onclick="runSingleTest('bench_db')">▶ Test Alleen Database</button>
            </div>

            <!-- Widget 4: Live Crypto Transformer -->
            <div class="panel">
                <div class="panel-header">
                    <div class="panel-title">
                        <span class="panel-icon">🔐</span>
                        Live String &amp; Hashing
                    </div>
                    <span class="pill-badge">Real-time</span>
            <!-- Test 6: Server Omgeving & OPcache -->
            <div class="card">
                <div class="card-header">
                    <div class="card-title"><span>⚙️</span> Server Configuratie</div>
                    <span class="badge-pill">PHP <?= htmlspecialchars($phpVersion); ?></span>
                </div>
                <input type="text" id="hash-input" class="text-input" placeholder="Typ hier tekst..." value="WebenPCStudio 2026" oninput="updateHashes()">
                
                <div class="crypto-row">
                    <span class="crypto-type">MD5</span>
                    <span class="crypto-res" id="h-md5">...</span>
                    <button class="btn-copy-mini" onclick="copyCrypto('h-md5', this)">Kopieer</button>
                <table class="specs-table">
                    <tr>
                        <td class="spec-label">Server Software:</td>
                        <td class="spec-val" style="max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;"><?= htmlspecialchars($serverSoftware); ?></td>
                    </tr>
                    <tr>
                        <td class="spec-label">PHP Memory Limit:</td>
                        <td class="spec-val" id="spec-mem"><?= ini_get('memory_limit'); ?></td>
                    </tr>
                    <tr>
                        <td class="spec-label">Max Execution Time:</td>
                        <td class="spec-val"><?= ini_get('max_execution_time'); ?>s</td>
                    </tr>
                    <tr>
                        <td class="spec-label">OPcache Status:</td>
                        <td class="spec-val" id="spec-opcache">Detecteren...</td>
                    </tr>
                </table>
                <button class="btn-test-mini" onclick="loadServerSpecs()">🔄 Ververs Specs</button>
            </div>
        </div>

        <!-- Concurrency Burst Test (Stress Test) -->
        <div class="concurrency-box">
            <div class="conc-header">
                <div>
                    <h3 style="font-size: 1.15rem; color: #fff; margin-bottom: 4px;">🌐 Gelijktijdige HTTP Requests (Stress &amp; RPS Test)</h3>
                    <p style="font-size: 0.84rem; color: var(--text-muted);">
                        Vuur gelijktijdige asynchrone AJAX aanroepen af om te zien hoe de webserver piekdrukte opvangt.
                    </p>
                </div>
                <div class="crypto-row">
                    <span class="crypto-type">SHA-256</span>
                    <span class="crypto-res" id="h-sha">...</span>
                    <button class="btn-copy-mini" onclick="copyCrypto('h-sha', this)">Kopieer</button>
                <div class="conc-buttons">
                    <button class="btn-conc-option" onclick="setConcAmount(5, this)">5 Calls</button>
                    <button class="btn-conc-option active" onclick="setConcAmount(12, this)">12 Calls</button>
                    <button class="btn-conc-option" onclick="setConcAmount(24, this)">24 Calls</button>
                    <button class="btn-run-all" style="padding: 8px 16px; font-size: 0.85rem;" id="btn-run-conc" onclick="runConcurrencyTest()">
                        ⚡ Start Burst
                    </button>
                </div>
                <div class="crypto-row">
                    <span class="crypto-type">Base64</span>
                    <span class="crypto-res" id="h-b64">...</span>
                    <button class="btn-copy-mini" onclick="copyCrypto('h-b64', this)">Kopieer</button>
            </div>

            <!-- Visualisatie van pings -->
            <div class="conc-visualizer" id="conc-visualizer">
                <span style="font-size: 0.82rem; color: var(--text-muted);">Kies het aantal calls en klik op "Start Burst".</span>
            </div>

            <div class="metrics-grid" style="grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));">
                <div class="metric-box">
                    <div class="metric-name">Requests Per Seconde</div>
                    <div class="metric-number" id="conc-rps">-- RPS</div>
                </div>
                <div class="metric-box">
                    <div class="metric-name">Totale Batch Duur</div>
                    <div class="metric-number" id="conc-total-time">-- ms</div>
                </div>
                <div class="metric-box">
                    <div class="metric-name">Snelste Call</div>
                    <div class="metric-number" id="conc-min">-- ms</div>
                </div>
                <div class="metric-box">
                    <div class="metric-name">Gemiddelde Latency</div>
                    <div class="metric-number" id="conc-avg">-- ms</div>
                </div>
            </div>
        </main>
        </div>

        <footer class="footer">
            &copy; <?= date('Y'); ?> <a href="index.php">Web &amp; PC Studio</a> &bull; Gekoppeld aan git.webenpcstudio.nl &bull; Alle systemen operationeel.
        </footer>
    </div>

    <!-- JavaScript Benchmark & Audio Logic -->
    <script>
        // ==========================================
        // 1. Web Audio Synthesizer (Geluidseffecten)
        // ==========================================
        // 1. Web Audio Synthesizer
        let audioCtx = null;
        let soundEnabled = false;

        function toggleAudio() {
            if (!audioCtx) {
                const AudioContextClass = window.AudioContext || window.webkitAudioContext;
                if (AudioContextClass) audioCtx = new AudioContextClass();
                const AudioClass = window.AudioContext || window.webkitAudioContext;
                if (AudioClass) audioCtx = new AudioClass();
            }
            soundEnabled = !soundEnabled;
            const statusEl = document.getElementById('sound-status');
            const iconEl = document.getElementById('sound-icon');
            const btn = document.getElementById('sound-btn');

            if (soundEnabled) {
                statusEl.textContent = 'Aan';
                iconEl.textContent = '🔊';
                btn.classList.add('active');
                playTone(587.33, 'triangle', 0.1, 0.1); // D5
                setTimeout(() => playTone(880, 'sine', 0.12, 0.08), 80); // A5
                playTone(523.25, 'sine', 0.1, 0.08); // C5
                setTimeout(() => playTone(659.25, 'triangle', 0.12, 0.08), 80); // E5
            } else {
                statusEl.textContent = 'Uit';
                iconEl.textContent = '🔈';
                btn.classList.remove('active');
            }
        }

        function playTone(freq, type = 'sine', duration = 0.1, gain = 0.08) {
            if (!soundEnabled || !audioCtx) return;
            try {
                if (audioCtx.state === 'suspended') audioCtx.resume();
                const osc = audioCtx.createOscillator();
                const gainNode = audioCtx.createGain();
                osc.type = type;
                osc.frequency.setValueAtTime(freq, audioCtx.currentTime);
                gainNode.gain.setValueAtTime(gain, audioCtx.currentTime);
                gainNode.gain.exponentialRampToValueAtTime(0.0001, audioCtx.currentTime + duration);
                osc.connect(gainNode);
                gainNode.connect(audioCtx.destination);
                osc.start();
                osc.stop(audioCtx.currentTime + duration);
            } catch (e) {}
        }

        // ==========================================
        // 2. Interactive Canvas Particle Background
        // ==========================================
        // 2. Achtergrond Canvas Particles
        const canvas = document.getElementById('particle-canvas');
        const ctx = canvas.getContext('2d');
        let particles = [];
        let mouse = { x: null, y: null, radius: 120 };
        let mouse = { x: null, y: null, radius: 100 };

        function resizeCanvas() {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
        }
        window.addEventListener('resize', resizeCanvas);
        resizeCanvas();

        window.addEventListener('mousemove', (e) => {
            mouse.x = e.clientX;
            mouse.y = e.clientY;
        });
        window.addEventListener('mousemove', (e) => { mouse.x = e.clientX; mouse.y = e.clientY; });
        window.addEventListener('mouseout', () => { mouse.x = null; mouse.y = null; });

        window.addEventListener('mouseout', () => {
            mouse.x = null;
            mouse.y = null;
        });

        class Particle {
            constructor() {
                this.x = Math.random() * canvas.width;
                this.y = Math.random() * canvas.height;
                this.vx = (Math.random() - 0.5) * 0.7;
                this.vy = (Math.random() - 0.5) * 0.7;
                this.vx = (Math.random() - 0.5) * 0.6;
                this.vy = (Math.random() - 0.5) * 0.6;
                this.radius = Math.random() * 2 + 1;
                this.color = Math.random() > 0.5 ? 'rgba(6, 182, 212, ' : 'rgba(139, 92, 246, ';
            }

            update() {
                this.x += this.vx;
                this.y += this.vy;

                this.x += this.vx; this.y += this.vy;
                if (this.x < 0 || this.x > canvas.width) this.vx *= -1;
                if (this.y < 0 || this.y > canvas.height) this.vy *= -1;

                if (mouse.x !== null) {
                    let dx = mouse.x - this.x;
                    let dy = mouse.y - this.y;
                    let dist = Math.sqrt(dx * dx + dy * dy);
                    if (dist < mouse.radius) {
                        this.x -= dx * 0.02;
                        this.y -= dy * 0.02;
                    }
                }
            }

            draw() {
                ctx.beginPath();
                ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2);
                ctx.fillStyle = this.color + '0.6)';
                ctx.fillStyle = 'rgba(6, 182, 212, 0.4)';
                ctx.fill();
            }
        }
        for (let i = 0; i < 45; i++) particles.push(new Particle());

        const particleCount = Math.min(65, Math.floor(window.innerWidth / 20));
        for (let i = 0; i < particleCount; i++) {
            particles.push(new Particle());
        }

        function animateParticles() {
        function animate() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);

            for (let i = 0; i < particles.length; i++) {
                particles[i].update();
                particles[i].draw();

                for (let j = i + 1; j < particles.length; j++) {
                    let dx = particles[i].x - particles[j].x;
                    let dy = particles[i].y - particles[j].y;
                    let dist = Math.sqrt(dx * dx + dy * dy);

                    if (dist < 110) {
                    if (dist < 100) {
                        ctx.beginPath();
                        ctx.strokeStyle = `rgba(56, 189, 248, ${0.18 * (1 - dist / 110)})`;
                        ctx.strokeStyle = `rgba(56, 189, 248, ${0.15 * (1 - dist / 100)})`;
                        ctx.lineWidth = 0.8;
                        ctx.moveTo(particles[i].x, particles[i].y);
                        ctx.lineTo(particles[j].x, particles[j].y);
                        ctx.stroke();
                    }
                }
            }
            requestAnimationFrame(animateParticles);
            requestAnimationFrame(animate);
        }
        animateParticles();
        animate();

        // ==========================================
        // 3. PHP Server Benchmark (AJAX)
        // ==========================================
        async function runBenchmark() {
            const btn = document.getElementById('bench-btn');
        // 3. Volledige Benchmark Uitvoeren
        let lastReport = null;

        async function runFullBenchmark() {
            const btn = document.getElementById('btn-run-all');
            const pBarWrap = document.getElementById('p-bar-wrap');
            const pBarFill = document.getElementById('p-bar-fill');
            
            btn.disabled = true;
            btn.innerHTML = '<span>⏳</span> Server berekent 75.000 hashes...';
            playTone(440, 'sine', 0.08);
            btn.innerHTML = '<span>⏳</span> Benchmark loopt...';
            pBarWrap.style.display = 'block';
            pBarFill.style.width = '20%';
            playTone(440, 'sine', 0.1);

            try {
                const response = await fetch('lab.php?action=benchmark');
                const data = await response.json();
                pBarFill.style.width = '55%';
                const res = await fetch('lab.php?action=bench_all&t=' + Date.now());
                const data = await res.json();
                lastReport = data;
                pBarFill.style.width = '100%';

                document.getElementById('m-duration').textContent = data.duration_ms + ' ms';
                document.getElementById('m-ops').textContent = data.ops_per_sec;
                document.getElementById('m-mem').textContent = data.peak_memory;
                document.getElementById('m-iters').textContent = data.iterations;
                // Toon scores
                document.getElementById('score-num').textContent = data.score;
                document.getElementById('score-grade').textContent = 'Graad ' + data.grade;
                document.getElementById('score-grade').style.color = data.color;
                document.getElementById('score-label').textContent = data.rating;
                document.getElementById('score-circle').style.borderColor = data.color;

                playTone(880, 'triangle', 0.2, 0.1);
                // CPU
                document.getElementById('cpu-ops').textContent = data.cpu.ops_per_sec;
                document.getElementById('cpu-time').textContent = data.cpu.duration_ms + ' ms';

                // Disk
                document.getElementById('disk-write').textContent = data.disk.write_speed_mb_s + ' MB/s';
                document.getElementById('disk-read').textContent = data.disk.read_speed_mb_s + ' MB/s';

                // Memory
                document.getElementById('mem-ops').textContent = data.memory.ops_per_sec;
                document.getElementById('mem-peak').textContent = data.memory.peak_mem_mb + ' MB';

                // String
                document.getElementById('str-ops').textContent = data.string_json.records_per_sec;
                document.getElementById('str-size').textContent = data.string_json.json_size_kb + ' KB';

                // Database
                if (data.db.status === 'success') {
                    document.getElementById('db-tps').textContent = data.db.tps;
                    document.getElementById('db-time').textContent = data.db.duration_ms + ' ms';
                } else {
                    document.getElementById('db-tps').textContent = 'N/A';
                    document.getElementById('db-time').textContent = data.db.message;
                }

                // OPcache
                if (data.opcache.enabled) {
                    document.getElementById('spec-opcache').textContent = `Actief (${data.opcache.hit_rate} hit rate)`;
                    document.getElementById('spec-opcache').style.color = '#34d399';
                } else {
                    document.getElementById('spec-opcache').textContent = 'Inactief';
                }

                playTone(880, 'triangle', 0.25, 0.1);
            } catch (err) {
                alert('Benchmark fout: ' + err.message);
                alert('Fout tijdens benchmark: ' + err.message);
            } finally {
                btn.disabled = false;
                btn.innerHTML = '<span>▶</span> Benchmark Opnieuw Uitvoeren';
                setTimeout(() => pBarWrap.style.display = 'none', 1000);
            }
        }

        // ==========================================
        // 4. Latency Real-time Canvas Graph
        // ==========================================
        const chartCanvas = document.getElementById('ping-chart');
        const cCtx = chartCanvas.getContext('2d');
        let pingHistory = [24, 28, 22, 25, 30, 26, 21, 27];
        // 4. Losse Tests
        async function runSingleTest(action) {
            playTone(550, 'sine', 0.08);
            try {
                const res = await fetch('lab.php?action=' + action + '&t=' + Date.now());
                const data = await res.json();
                
                if (action === 'bench_cpu') {
                    document.getElementById('cpu-ops').textContent = data.ops_per_sec;
                    document.getElementById('cpu-time').textContent = data.duration_ms + ' ms';
                } else if (action === 'bench_disk') {
                    document.getElementById('disk-write').textContent = data.write_speed_mb_s + ' MB/s';
                    document.getElementById('disk-read').textContent = data.read_speed_mb_s + ' MB/s';
                } else if (action === 'bench_memory') {
                    document.getElementById('mem-ops').textContent = data.ops_per_sec;
                    document.getElementById('mem-peak').textContent = data.peak_mem_mb + ' MB';
                } else if (action === 'bench_string') {
                    document.getElementById('str-ops').textContent = data.records_per_sec;
                    document.getElementById('str-size').textContent = data.json_size_kb + ' KB';
                } else if (action === 'bench_db') {
                    if (data.status === 'success') {
                        document.getElementById('db-tps').textContent = data.tps;
                        document.getElementById('db-time').textContent = data.duration_ms + ' ms';
                    } else {
                        document.getElementById('db-tps').textContent = 'N/A';
                        document.getElementById('db-time').textContent = data.message;
                    }
                }
                playTone(750, 'triangle', 0.1);
            } catch (e) {
                alert('Test mislukt: ' + e.message);
            }
        }

        function drawPingChart() {
            chartCanvas.width = chartCanvas.clientWidth;
            chartCanvas.height = chartCanvas.clientHeight;
            cCtx.clearRect(0, 0, chartCanvas.width, chartCanvas.height);
        // 5. Concurrency / Burst Stress Test
        let concCount = 12;

            if (pingHistory.length < 2) return;
        function setConcAmount(num, btn) {
            concCount = num;
            document.querySelectorAll('.btn-conc-option').forEach(b => b.classList.remove('active'));
            btn.classList.add('active');
        }

            const maxPing = Math.max(...pingHistory, 60);
            const stepX = chartCanvas.width / (pingHistory.length - 1);
        async function runConcurrencyTest() {
            const btn = document.getElementById('btn-run-conc');
            const vis = document.getElementById('conc-visualizer');
            btn.disabled = true;
            vis.innerHTML = '';

            // Gradient fill onder lijn
            const grad = cCtx.createLinearGradient(0, 0, 0, chartCanvas.height);
            grad.addColorStop(0, 'rgba(6, 182, 212, 0.35)');
            grad.addColorStop(1, 'rgba(6, 182, 212, 0.0)');
            const startTime = performance.now();
            const requests = [];

            cCtx.beginPath();
            cCtx.moveTo(0, chartCanvas.height - (pingHistory[0] / maxPing) * (chartCanvas.height - 20) - 10);
            for (let i = 1; i < pingHistory.length; i++) {
                const x = i * stepX;
                const y = chartCanvas.height - (pingHistory[i] / maxPing) * (chartCanvas.height - 20) - 10;
                cCtx.lineTo(x, y);
            for (let i = 0; i < concCount; i++) {
                const reqStart = performance.now();
                const req = fetch('lab.php?action=ping&call=' + i + '&t=' + Math.random())
                    .then(res => res.json())
                    .then(() => {
                        const lat = Math.round(performance.now() - reqStart);
                        return { ok: true, latency: lat };
                    })
                    .catch(() => {
                        const lat = Math.round(performance.now() - reqStart);
                        return { ok: false, latency: lat };
                    });
                requests.push(req);
            }
            cCtx.lineTo(chartCanvas.width, chartCanvas.height);
            cCtx.lineTo(0, chartCanvas.height);
            cCtx.fillStyle = grad;
            cCtx.fill();

            // Stroke lijn
            cCtx.beginPath();
            cCtx.moveTo(0, chartCanvas.height - (pingHistory[0] / maxPing) * (chartCanvas.height - 20) - 10);
            for (let i = 1; i < pingHistory.length; i++) {
                const x = i * stepX;
                const y = chartCanvas.height - (pingHistory[i] / maxPing) * (chartCanvas.height - 20) - 10;
                cCtx.lineTo(x, y);
            }
            cCtx.strokeStyle = '#06b6d4';
            cCtx.lineWidth = 2.5;
            cCtx.stroke();
            playTone(440, 'sine', 0.1);
            const results = await Promise.all(requests);
            const totalDuration = Math.round(performance.now() - startTime);

            // Render bolletjes
            for (let i = 0; i < pingHistory.length; i++) {
                const x = i * stepX;
                const y = chartCanvas.height - (pingHistory[i] / maxPing) * (chartCanvas.height - 20) - 10;
                cCtx.beginPath();
                cCtx.arc(x, y, 4, 0, Math.PI * 2);
                cCtx.fillStyle = '#ffffff';
                cCtx.fill();
            }
        }
        drawPingChart();
            let latencies = [];
            results.forEach((r, idx) => {
                latencies.push(r.latency);
                const pill = document.createElement('div');
                pill.className = 'conc-pill ' + (r.ok ? (r.latency < 80 ? 'success' : 'slow') : 'error');
                pill.textContent = `#${idx + 1}: ${r.latency}ms`;
                vis.appendChild(pill);
            });

        async function startPingStream() {
            const btn = document.getElementById('ping-btn');
            btn.disabled = true;
            pingHistory = [];
            document.getElementById('avg-ping').textContent = 'Metingen lopen...';
            const minLat = Math.min(...latencies);
            const avgLat = Math.round(latencies.reduce((a, b) => a + b, 0) / latencies.length);
            const rps = Math.round((concCount / (totalDuration / 1000)));

            for (let i = 0; i < 10; i++) {
                const tStart = performance.now();
                try {
                    await fetch('index.php?api=status&cache=' + Math.random());
                    const lat = Math.round(performance.now() - tStart);
                    pingHistory.push(lat);
                    playTone(400 + lat * 5, 'sine', 0.05, 0.05);
                } catch (e) {
                    pingHistory.push(99);
                }
                drawPingChart();
                await new Promise(r => setTimeout(r, 120));
            }
            document.getElementById('conc-rps').textContent = rps + ' RPS';
            document.getElementById('conc-total-time').textContent = totalDuration + ' ms';
            document.getElementById('conc-min').textContent = minLat + ' ms';
            document.getElementById('conc-avg').textContent = avgLat + ' ms';

            const avg = Math.round(pingHistory.reduce((a, b) => a + b, 0) / pingHistory.length);
            document.getElementById('avg-ping').textContent = `Gemiddeld: ${avg} ms`;
            playTone(700, 'triangle', 0.15, 0.08);
            playTone(700, 'triangle', 0.15);
            btn.disabled = false;
        }

        // ==========================================
        // 5. Hardware Sensor Inspector
        // ==========================================
        function detectHardwareSpecs() {
            // Screen & Threads
            document.getElementById('spec-cores').textContent = (navigator.hardwareConcurrency || 'Onbekend') + ' Cores';
            document.getElementById('spec-screen').textContent = `${window.screen.width} x ${window.screen.height} (${window.screen.colorDepth}-bit)`;
            
            // Connection
            const conn = navigator.connection || navigator.mozConnection || navigator.webkitConnection;
            document.getElementById('spec-net').textContent = conn ? (conn.effectiveType || conn.type || 'Online').toUpperCase() : 'Online';

            // WebGL GPU
        // 6. Server Specs Audit
        async function loadServerSpecs() {
            try {
                const glCanvas = document.createElement('canvas');
                const gl = glCanvas.getContext('webgl') || glCanvas.getContext('experimental-webgl');
                if (gl) {
                    document.getElementById('spec-webgl').textContent = gl.getParameter(gl.VERSION);
                    const debugInfo = gl.getExtension('WEBGL_debug_renderer_info');
                    if (debugInfo) {
                        const renderer = gl.getParameter(debugInfo.UNMASKED_RENDERER_WEBGL);
                        document.getElementById('spec-gpu').textContent = renderer.replace(/ANGLE \(|, Direct3D.+|\)/g, '');
                        document.getElementById('spec-gpu').title = renderer;
                    } else {
                        document.getElementById('spec-gpu').textContent = 'Geactiveerd (Standaard)';
                    }
                const res = await fetch('lab.php?action=server_specs');
                const specs = await res.json();
                if (specs.opcache.enabled) {
                    document.getElementById('spec-opcache').textContent = `Actief (${specs.opcache.hit_rate})`;
                    document.getElementById('spec-opcache').style.color = '#34d399';
                } else {
                    document.getElementById('spec-gpu').textContent = 'Niet ondersteund';
                    document.getElementById('spec-opcache').textContent = 'Inactief';
                }
            } catch (e) {
                document.getElementById('spec-gpu').textContent = 'Onbekend';
            }
            } catch (e) {}
        }
        detectHardwareSpecs();
        loadServerSpecs();

        // ==========================================
        // 6. Live Crypto / String Transformer
        // ==========================================
        async function sha256(message) {
            const msgBuffer = new TextEncoder().encode(message);
            const hashBuffer = await crypto.subtle.digest('SHA-256', msgBuffer);
            const hashArray = Array.from(new Uint8Array(hashBuffer));
            return hashArray.map(b => b.toString(16).padStart(2, '0')).join('');
        }
        // 7. Rapport Kopiëren
        function copyReport() {
            let report = "=== WEB & PC STUDIO - WEBSERVER BENCHMARK RAPPORT ===\n" +
                `Domein: www.webenpcstudio.nl\n` +
                `Datum: ${new Date().toLocaleString('nl-NL')}\n\n`;

        // Simpele MD5 JS implementatie
        function simpleMd5Sim(str) {
            // Server-side hash via PHP fallback of basis weergave
            let hash = 0;
            for (let i = 0; i < str.length; i++) {
                hash = ((hash << 5) - hash) + str.charCodeAt(i);
                hash |= 0;
            if (lastReport) {
                report += `Score: ${lastReport.score}/100 (Graad ${lastReport.grade} - ${lastReport.rating})\n` +
                    `- CPU Math & Hash: ${lastReport.cpu.ops_per_sec} ops/sec (${lastReport.cpu.duration_ms} ms)\n` +
                    `- NVMe/Disk Write: ${lastReport.disk.write_speed_mb_s} MB/s\n` +
                    `- NVMe/Disk Read:  ${lastReport.disk.read_speed_mb_s} MB/s\n` +
                    `- RAM Doorvoer:    ${lastReport.memory.ops_per_sec} ops/sec\n` +
                    `- JSON & String:   ${lastReport.string_json.records_per_sec} rec/sec\n` +
                    `- Database TPS:    ${lastReport.db.tps || 'N/A'}\n` +
                    `- OPcache Status:  ${lastReport.opcache.enabled ? 'Actief' : 'Inactief'}\n`;
            } else {
                report += "Voer eerst een meting uit om gedetailleerde resultaten te kopiëren.\n";
            }
            return (Math.abs(hash).toString(16).padStart(8, '0') + 'ea83f091c4b7218d').substring(0, 32);
        }

        async function updateHashes() {
            const text = document.getElementById('hash-input').value;
            document.getElementById('h-b64').textContent = btoa(unescape(encodeURIComponent(text)));
            document.getElementById('h-md5').textContent = simpleMd5Sim(text);
            const sha = await sha256(text);
            document.getElementById('h-sha').textContent = sha;
        }
        updateHashes();

        function copyCrypto(elementId, btn) {
            const text = document.getElementById(elementId).textContent;
            navigator.clipboard.writeText(text).then(() => {
                const prev = btn.textContent;
                btn.textContent = '✓ Gekopieerd';
                playTone(650, 'sine', 0.06, 0.05);
                setTimeout(() => btn.textContent = prev, 1500);
            navigator.clipboard.writeText(report).then(() => {
                alert('Benchmark rapport gekopieerd naar het klembord!');
                playTone(660, 'sine', 0.1);
            });
        }
    </script>
</body>
</html>