<?php
header('Content-Type: text/plain; charset=utf-8');
header('Cache-Control: no-store');
try {
    require '/var/www/html/includes/conn.php';
    // A database connection alone is insufficient: the initial import and
    // migrations must also be present before this instance is ready for users.
    foreach (['in_daper', 'in_soal', 'in_jawab', 'rec_admin', 'rec_exam_attempt', 'rec_exam_event', 'rec_candidate_login_guard'] as $table) {
        $conn->query("SELECT 1 FROM `$table` LIMIT 0");
    }
    $conn->query('SELECT email, nama_de, nama_be, idkar, password_hash FROM rec_admin LIMIT 0');
    echo "ok\n";
} catch (Throwable $error) {
    http_response_code(503);
    // Never expose connection details, credentials, or schema errors over HTTP.
    echo "not ready\n";
}