<?php
/**
 * Eigenstaendige Server-Diagnose (kein Laravel noetig).
 * Aufruf: https://deine-domain.de/check.php
 *
 * WICHTIG: Diese Datei nach erfolgreicher Installation loeschen!
 */
error_reporting(E_ALL);
ini_set('display_errors', '1');

$basePath = __DIR__ . '/..';
$results = [];

// ─── PHP ─────────────────────────────────────────────────────
$results[] = [
    'group' => 'PHP',
    'name'  => 'PHP-Version',
    'value' => PHP_VERSION,
    'ok'    => version_compare(PHP_VERSION, '8.2.0', '>='),
    'hint'  => 'Mindestens PHP 8.2 erforderlich.',
];

$results[] = [
    'group' => 'PHP',
    'name'  => 'Server-API (SAPI)',
    'value' => PHP_SAPI,
    'ok'    => true,
    'hint'  => '',
];

$extensions = ['pdo', 'pdo_sqlite', 'mbstring', 'openssl', 'tokenizer', 'xml', 'ctype', 'fileinfo', 'dom', 'curl'];
foreach ($extensions as $ext) {
    $results[] = [
        'group' => 'PHP-Extensions',
        'name'  => $ext,
        'value' => extension_loaded($ext) ? 'Geladen' : 'Fehlt',
        'ok'    => extension_loaded($ext),
        'hint'  => $ext === 'pdo_sqlite' ? 'Nur fuer SQLite noetig' : '',
    ];
}

// Optional
$results[] = [
    'group' => 'PHP-Extensions',
    'name'  => 'pdo_mysql (optional)',
    'value' => extension_loaded('pdo_mysql') ? 'Geladen' : 'Fehlt',
    'ok'    => true, // optional
    'hint'  => 'Nur fuer MySQL noetig.',
];

// ─── Dateisystem ─────────────────────────────────────────────
$dirs = [
    'storage',
    'storage/app',
    'storage/framework',
    'storage/framework/cache',
    'storage/framework/cache/data',
    'storage/framework/sessions',
    'storage/framework/views',
    'storage/logs',
    'bootstrap/cache',
    'database',
];

foreach ($dirs as $dir) {
    $full = $basePath . '/' . $dir;
    $exists = is_dir($full);
    $writable = $exists && is_writable($full);
    $perms = $exists ? substr(sprintf('%o', fileperms($full)), -4) : '-';
    $owner = $exists ? (function_exists('posix_getpwuid') ? posix_getpwuid(fileowner($full))['name'] ?? fileowner($full) : fileowner($full)) : '-';

    $results[] = [
        'group' => 'Verzeichnisse',
        'name'  => $dir . '/',
        'value' => ($exists ? 'Existiert' : 'FEHLT') . ' | ' . ($writable ? 'Beschreibbar' : 'NICHT beschreibbar') . ' | ' . $perms . ' | Owner: ' . $owner,
        'ok'    => $writable,
        'hint'  => !$writable ? 'Berechtigungen auf 775 setzen' : '',
    ];
}

// ─── Dateien ─────────────────────────────────────────────────
$files = [
    '.env'            => 'Konfigurationsdatei (wird automatisch erstellt)',
    '.env.example'    => 'Vorlage fuer .env',
    'vendor/autoload.php' => 'Composer-Abhaengigkeiten',
    'bootstrap/app.php'   => 'Laravel-Bootstrap',
    'storage/installed'   => 'Installations-Marker (fehlt bei Erstinstallation)',
];

foreach ($files as $file => $desc) {
    $full = $basePath . '/' . $file;
    $exists = file_exists($full);
    // storage/installed SOLL bei Erstinstallation fehlen
    $isOptional = ($file === 'storage/installed' || $file === '.env');

    $results[] = [
        'group' => 'Dateien',
        'name'  => $file,
        'value' => $exists ? 'Vorhanden' : 'Fehlt',
        'ok'    => $exists || $isOptional,
        'hint'  => $desc,
    ];
}

// ─── Webserver ───────────────────────────────────────────────
$results[] = [
    'group' => 'Webserver',
    'name'  => 'Server-Software',
    'value' => $_SERVER['SERVER_SOFTWARE'] ?? 'Unbekannt',
    'ok'    => true,
    'hint'  => '',
];

$results[] = [
    'group' => 'Webserver',
    'name'  => 'Document Root',
    'value' => $_SERVER['DOCUMENT_ROOT'] ?? 'Unbekannt',
    'ok'    => true,
    'hint'  => 'Muss auf den public/-Ordner zeigen.',
];

$results[] = [
    'group' => 'Webserver',
    'name'  => 'Script-Pfad',
    'value' => __FILE__,
    'ok'    => true,
    'hint'  => '',
];

$results[] = [
    'group' => 'Webserver',
    'name'  => 'PHP-User',
    'value' => function_exists('posix_getpwuid') ? (posix_getpwuid(posix_geteuid())['name'] ?? posix_geteuid()) : get_current_user(),
    'ok'    => true,
    'hint'  => 'Unter diesem User laeuft PHP.',
];

$results[] = [
    'group' => 'Webserver',
    'name'  => 'mod_rewrite',
    'value' => (function_exists('apache_get_modules') && in_array('mod_rewrite', apache_get_modules())) ? 'Aktiv' : 'Nicht pruefbar / Nicht aktiv',
    'ok'    => true, // Can't reliably detect
    'hint'  => 'Wird fuer saubere URLs benoetigt.',
];

// ─── index.php Datei-Check ───────────────────────────────────
$indexPath = __DIR__ . '/index.php';
$indexExists = file_exists($indexPath);
$indexSize = $indexExists ? filesize($indexPath) : 0;
$indexMtime = $indexExists ? date('Y-m-d H:i:s', filemtime($indexPath)) : '-';
$indexFirstLines = $indexExists ? implode("\n", array_slice(file($indexPath), 0, 10)) : '';
$hasTryCatch = $indexExists && strpos(file_get_contents($indexPath), 'Throwable') !== false;

$results[] = [
    'group' => 'index.php Pruefung',
    'name'  => 'Dateigroesse',
    'value' => $indexSize . ' Bytes',
    'ok'    => $indexSize > 1000,
    'hint'  => 'Neue index.php sollte ueber 5000 Bytes sein.',
];
$results[] = [
    'group' => 'index.php Pruefung',
    'name'  => 'Letzte Aenderung',
    'value' => $indexMtime,
    'ok'    => true,
    'hint'  => '',
];
$results[] = [
    'group' => 'index.php Pruefung',
    'name'  => 'try-catch vorhanden',
    'value' => $hasTryCatch ? 'Ja' : 'Nein (ALTE VERSION!)',
    'ok'    => $hasTryCatch,
    'hint'  => 'Bitte die aktuelle index.php erneut hochladen.',
];

// ─── Laravel Boot-Test ───────────────────────────────────────
$bootSteps = [];
$bootError = null;

// Schritt 1: Autoloader laden
try {
    require_once __DIR__ . '/../vendor/autoload.php';
    $bootSteps[] = ['name' => 'vendor/autoload.php laden', 'ok' => true, 'error' => ''];
} catch (\Throwable $e) {
    $bootSteps[] = ['name' => 'vendor/autoload.php laden', 'ok' => false, 'error' => $e->getMessage()];
    $bootError = $e;
}

// Schritt 2: Bootstrap laden (nur wenn Schritt 1 ok)
if (!$bootError) {
    try {
        $app = require_once __DIR__ . '/../bootstrap/app.php';
        $bootSteps[] = ['name' => 'bootstrap/app.php laden', 'ok' => true, 'error' => ''];
    } catch (\Throwable $e) {
        $bootSteps[] = ['name' => 'bootstrap/app.php laden', 'ok' => false, 'error' => $e->getMessage()];
        $bootError = $e;
    }
}

// Schritt 3: Kernel erstellen (nur wenn Schritt 2 ok)
if (!$bootError && isset($app)) {
    try {
        $kernel = $app->make(\Illuminate\Contracts\Http\Kernel::class);
        $bootSteps[] = ['name' => 'HTTP-Kernel erstellen', 'ok' => true, 'error' => ''];
    } catch (\Throwable $e) {
        $bootSteps[] = ['name' => 'HTTP-Kernel erstellen', 'ok' => false, 'error' => $e->getMessage()];
        $bootError = $e;
    }
}

// Schritt 4: Request-Handling simulieren (nur wenn Schritt 3 ok)
if (!$bootError && isset($app)) {
    try {
        // Simuliere einen GET / Request
        $testRequest = \Illuminate\Http\Request::create('/', 'GET');
        $response = $app->make(\Illuminate\Contracts\Http\Kernel::class)->handle($testRequest);
        $statusCode = $response->getStatusCode();
        $isRedirect = $statusCode >= 300 && $statusCode < 400;
        $redirectTo = $isRedirect ? $response->headers->get('Location', '') : '';

        $bootSteps[] = [
            'name' => 'Request-Handling (GET /)',
            'ok' => true,
            'error' => 'Status ' . $statusCode . ($isRedirect ? ' → Redirect nach ' . $redirectTo : ''),
        ];
    } catch (\Throwable $e) {
        $bootSteps[] = ['name' => 'Request-Handling (GET /)', 'ok' => false, 'error' => $e->getMessage()];
        $bootError = $e;
    }
}

// Schritt 5: Auch /install testen (dort laeuft die eigentliche Seite)
if (!$bootError && isset($app)) {
    try {
        // Log leeren, damit wir nur den Fehler von diesem Request sehen
        $logFile = __DIR__ . '/../storage/logs/laravel.log';
        @file_put_contents($logFile, '');

        // Debug aktivieren, damit die Exception geloggt wird
        config(['app.debug' => true]);

        $installRequest = \Illuminate\Http\Request::create('/install', 'GET');
        $installResponse = $app->make(\Illuminate\Contracts\Http\Kernel::class)->handle($installRequest);
        $installStatus = $installResponse->getStatusCode();

        if ($installStatus >= 500) {
            // Fehler aus dem Log auslesen
            $logContent = file_exists($logFile) ? file_get_contents($logFile) : '';
            // Nur die erste Fehlermeldung extrahieren (bis zur ersten Leerzeile)
            $logLines = explode("\n", $logContent);
            $errorMsg = '';
            foreach ($logLines as $line) {
                if (strlen($errorMsg) > 1500) break;
                $errorMsg .= $line . "\n";
            }
            $errorMsg = trim($errorMsg) ?: '(kein Log-Eintrag gefunden)';

            $bootSteps[] = [
                'name' => 'Request-Handling (GET /install)',
                'ok' => false,
                'error' => 'Status ' . $installStatus . ' — Fehler aus laravel.log: ' . $errorMsg,
            ];
        } else {
            $bootSteps[] = [
                'name' => 'Request-Handling (GET /install)',
                'ok' => true,
                'error' => 'Status ' . $installStatus,
            ];
        }
    } catch (\Throwable $e) {
        $bootSteps[] = ['name' => 'Request-Handling (GET /install)', 'ok' => false, 'error' => $e->getMessage()];
        $bootError = $e;
    }
}

// ─── OPcache ─────────────────────────────────────────────────
$opcacheEnabled = function_exists('opcache_get_status') && opcache_get_status() !== false;
$results[] = [
    'group' => 'OPcache',
    'name'  => 'OPcache aktiv',
    'value' => $opcacheEnabled ? 'Ja' : 'Nein',
    'ok'    => true,
    'hint'  => '',
];

if ($opcacheEnabled) {
    $status = opcache_get_status();
    $results[] = [
        'group' => 'OPcache',
        'name'  => 'validate_timestamps',
        'value' => ini_get('opcache.validate_timestamps') ? 'Ja' : 'Nein (gefaehrlich!)',
        'ok'    => (bool) ini_get('opcache.validate_timestamps'),
        'hint'  => 'Ohne validate_timestamps werden Dateiupdates nicht erkannt.',
    ];

    // OPcache fuer index.php invalidieren
    $indexInvalidated = opcache_invalidate(__DIR__ . '/index.php', true);
    $results[] = [
        'group' => 'OPcache',
        'name'  => 'index.php Cache invalidiert',
        'value' => $indexInvalidated ? 'Ja (erfolgreich)' : 'Nein / nicht noetig',
        'ok'    => true,
        'hint'  => '',
    ];
}

foreach ($bootSteps as $step) {
    $results[] = [
        'group' => 'Laravel Boot-Test',
        'name'  => $step['name'],
        'value' => $step['ok'] ? 'OK' : 'FEHLER: ' . $step['error'],
        'ok'    => $step['ok'],
        'hint'  => $step['error'],
    ];
}

if ($bootError) {
    $results[] = [
        'group' => 'Laravel Boot-Test',
        'name'  => 'Stack-Trace',
        'value' => $bootError->getFile() . ':' . $bootError->getLine(),
        'ok'    => false,
        'hint'  => $bootError->getTraceAsString(),
    ];
}

// ─── Zusammenfassung ─────────────────────────────────────────
$allOk = true;
foreach ($results as $r) {
    if (!$r['ok']) {
        $allOk = false;
        break;
    }
}

// ─── HTML-Ausgabe ────────────────────────────────────────────
?>
<!DOCTYPE html>
<html lang="de">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Server-Diagnose</title>
    <script src="https://cdn.tailwindcss.com"></script>
</head>
<body class="min-h-screen bg-gray-100 py-8 px-4">
    <div class="max-w-3xl mx-auto">
        <div class="text-center mb-6">
            <h1 class="text-xl font-bold text-gray-900">Server-Diagnose</h1>
            <p class="text-sm text-gray-500 mt-1">
                Handball WebApp &mdash; Systemcheck
            </p>
        </div>

        <?php if ($allOk): ?>
        <div class="bg-green-50 border border-green-200 rounded-md p-4 mb-6 text-sm text-green-800">
            Alle Voraussetzungen sind erfuellt. Die Installation sollte funktionieren.
            <br>Rufe die Hauptseite auf, um den Installer zu starten.
        </div>
        <?php else: ?>
        <div class="bg-red-50 border border-red-200 rounded-md p-4 mb-6 text-sm text-red-800">
            Es gibt Probleme, die behoben werden muessen (rot markiert).
        </div>
        <?php endif; ?>

        <?php
        $currentGroup = '';
        foreach ($results as $r):
            if ($r['group'] !== $currentGroup):
                if ($currentGroup !== '') echo '</tbody></table></div>';
                $currentGroup = $r['group'];
        ?>
        <div class="bg-white rounded-lg shadow-md mb-4 overflow-hidden">
            <h2 class="bg-gray-50 px-4 py-2 text-sm font-semibold text-gray-700 border-b"><?php echo htmlspecialchars($currentGroup); ?></h2>
            <table class="w-full text-sm">
            <tbody>
        <?php endif; ?>
                <tr class="border-b border-gray-100 <?php echo $r['ok'] ? '' : 'bg-red-50'; ?>">
                    <td class="px-4 py-2 font-mono text-gray-800 whitespace-nowrap"><?php echo htmlspecialchars($r['name']); ?></td>
                    <td class="px-4 py-2 text-gray-600"><?php echo htmlspecialchars($r['value']); ?></td>
                    <td class="px-2 py-2 text-center w-8">
                        <?php if ($r['ok']): ?>
                            <span class="text-green-500">&#10003;</span>
                        <?php else: ?>
                            <span class="text-red-500 font-bold">&#10007;</span>
                        <?php endif; ?>
                    </td>
                </tr>
                <?php if (!$r['ok'] && $r['hint']): ?>
                <tr class="bg-red-50 border-b border-red-100">
                    <td colspan="3" class="px-4 py-1 text-xs text-red-600">
                        <pre class="whitespace-pre-wrap break-all">&rarr; <?php echo htmlspecialchars($r['hint']); ?></pre>
                    </td>
                </tr>
                <?php endif; ?>
        <?php endforeach; ?>
            </tbody></table>
        </div>

        <div class="flex justify-center gap-4 mt-6">
            <a href="check.php" class="px-4 py-2 text-sm font-medium text-white bg-blue-600 rounded-md hover:bg-blue-700">
                Erneut pruefen
            </a>
            <?php if ($allOk): ?>
            <a href="/" class="px-4 py-2 text-sm font-medium text-white bg-green-600 rounded-md hover:bg-green-700">
                Installation starten
            </a>
            <?php endif; ?>
        </div>

        <p class="text-center text-xs text-gray-400 mt-6">
            Diese Datei nach erfolgreicher Installation loeschen (check.php).
        </p>
    </div>
</body>
</html>