<?php
defined("BASEPATH") or exit("No direct script access allowed");

 /*
SQL DDL untuk tabel qr_printout:

CREATE TABLE IF NOT EXISTS `qr_printout` (
  `QR_PrintOutID`               int(11)      NOT NULL AUTO_INCREMENT,
  `QR_PrintOutT_OrderHeaderID`  int(11)      NOT NULL DEFAULT 0
    COMMENT 'FK ke t_orderheader',
  `QR_PrintOutGroup_ResultID`   int(11)      NOT NULL DEFAULT 0
    COMMENT 'FK ke m_groupresult (opsional)',
  `QR_PrintOutT_TestID`         int(11)      NOT NULL DEFAULT 0
    COMMENT 'FK ke m_test (opsional)',
  `QR_PrintOutGroup_ResultName` varchar(250) NOT NULL DEFAULT ''
    COMMENT 'Label group hasil cetak (snapshot)',
  `QR_PrintOutUUID`             varchar(36)  NOT NULL DEFAULT ''
    COMMENT 'UUID v4 unik per sesi cetak',
  `QR_PrintOutVerifyURL`        varchar(500) NOT NULL DEFAULT ''
    COMMENT 'URL QR Code & tujuan upload: https://ds.com/files/{uuid}.pdf (Golang upload ke sini, pasien scan QR buka ini)',
  `QR_PrintOutReportURL`        varchar(500) NOT NULL DEFAULT ''
    COMMENT 'URL sumber PDF di PHP app server (Golang HTTP-fetch dari sini untuk diupload ke dedicated server)',
  `QR_PrintOutTempFilePath`     varchar(500) NOT NULL DEFAULT ''
    COMMENT 'Path absolut file PDF sementara di PHP server (untuk diambil Golang)',
  `QR_PrintOutUploadStatus`     enum('pending','uploaded','failed','failed_permanent') NOT NULL DEFAULT 'pending'
    COMMENT 'Status upload: pending|uploaded|failed (retry<3)|failed_permanent (retry>=3)',
  `QR_PrintOutRetryCount`       int(11)      NOT NULL DEFAULT 0
    COMMENT 'Berapa kali sudah dicoba upload, maksimal 3',
  `QR_PrintOutLastRetryAt`      datetime     DEFAULT NULL
    COMMENT 'Waktu percobaan upload terakhir yang gagal',
  `QR_PrintOutUploadedAt`       datetime     DEFAULT NULL
    COMMENT 'Waktu upload PDF ke dedicated server berhasil',
  `QR_PrintOutCreatedAt`        datetime     NOT NULL DEFAULT CURRENT_TIMESTAMP
    COMMENT 'Waktu token QR dibuat',
  `QR_PrintOutCreatedByUserID`  int(11)      NOT NULL DEFAULT 0
    COMMENT 'UserID yang mencetak laporan',
  `QR_PrintOutIsActive`         tinyint(1)   NOT NULL DEFAULT 1
    COMMENT '1=aktif, 0=dinonaktifkan (mis. hasil direvisi)',
  PRIMARY KEY (`QR_PrintOutID`),
  UNIQUE KEY `uq_qr_uuid` (`QR_PrintOutUUID`),
  KEY `idx_order_header` (`QR_PrintOutT_OrderHeaderID`),
  KEY `idx_upload_status` (`QR_PrintOutUploadStatus`),
  KEY `idx_retry` (`QR_PrintOutUploadStatus`, `QR_PrintOutRetryCount`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
  COMMENT='Token QR Code untuk verifikasi keaslian laporan hasil laboratorium';
 */
/**
 * Generateqrreport Library
 *
 * Library untuk generate QR Code pada laporan hasil laboratorium.
 * QR Code berisi URL langsung ke file PDF di dedicated server.
 * Saat QR di-scan, browser langsung membuka file PDF tersebut.
 *
 * Arsitektur:
 *
 *   ┌─ PHP App (ini) ──────────────────────────────────────────────┐
 *   │ 1. saveQRPrintout(verifyBaseURL='https://ds.com/files')       │
 *   │    → UUID + verifyURL = https://ds.com/files/{uuid}.pdf      │
 *   │    verifyURL = URL final PDF = yang di-encode ke QR Code     │
 *   │ 2. generateQRImageBase64(verifyURL) → embed QR ke PDF cetak  │
 *   │ 3. saveTempPDF() → simpan PDF sementara di /tmp/             │
 *   └──────────────────────────────────────────────────────────────┘
 *           │
 *           ▼
 *   ┌─ Golang Upload Tool ─────────────────────────────────────────┐
 *   │ - Poll PHP API: getPendingUploads()                           │
 *   │ - Ambil TempFilePath dari row                                 │
 *   │ - Upload PDF ke dedicated server pada path sesuai verifyURL  │
 *   │ - Berhasil → callback confirmUpload($uuid)                    │
 *   │ - Gagal    → callback incrementRetry($uuid)                  │
 *   └──────────────────────────────────────────────────────────────┘
 *
 *   ┌─ Dedicated Server ───────────────────────────────────────────┐
 *   │ - Serve file PDF statis                                       │
 *   │ - URL: https://ds.com/files/{uuid}.pdf                       │
 *   │ - Saat QR di-scan → browser langsung buka PDF ini            │
 *   └──────────────────────────────────────────────────────────────┘
 *
 * Tabel yang digunakan: qr_printout
 * (lihat: sql/qr_printout_updated.sql untuk DDL lengkap)
 */
class Generateqrreport
{
    /** @var CI_DB_driver */
    protected $db_smartone;

    /** @var CI_DB_driver */
    protected $db_onedev;

    function __construct()
    {
        $CI = & get_instance();
        $this->db_smartone = $CI->load->database("default", true);
        $this->db_onedev = $CI->load->database("default", true);

        $this->_loadQRLib();
    }

    // =========================================================================
    // PRIVATE HELPERS
    // =========================================================================

    /**
     * Load phpqrcode library jika belum di-include.
     */
    private function _loadQRLib()
    {
        if (!class_exists('QRcode', false)) {
            $libPath = APPPATH . 'libraries/qrcode/';
            if (!defined('QR_CACHEABLE'))
                define('QR_CACHEABLE', false);
            if (!defined('QR_CACHE_DIR'))
                define('QR_CACHE_DIR', APPPATH . 'cache/');
            if (!defined('QR_LOG_DIR'))
                define('QR_LOG_DIR', APPPATH . 'logs/');
            if (!defined('QR_FIND_BEST_MASK'))
                define('QR_FIND_BEST_MASK', true);
            if (!defined('QR_FIND_FROM_RANDOM'))
                define('QR_FIND_FROM_RANDOM', false);
            if (!defined('QR_PNG_MAXIMUM_SIZE'))
                define('QR_PNG_MAXIMUM_SIZE', 1024);

            include_once $libPath . 'phpqrcode.php';
        }
    }

    /**
     * Generate UUID v4.
     *
     * @param  bool $withHyphens true → 36 char 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
     *                           false → 32 char hex tanpa tanda hubung
     * @return string
     */
    private function _generateUUID($withHyphens = true)
    {
        $data = random_bytes(16);
        $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // version 4
        $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // variant bits

        $uuid = vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
        return $withHyphens ? $uuid : str_replace('-', '', $uuid);
    }

    /**
     * Normalisasi UUID: konversi 32-char (tanpa hyphen) ke format 36-char standar.
     *
     * @param  string $uuid
     * @return string lowercase 36-char UUID
     */
    private function _normalizeUUID($uuid)
    {
        $uuid = trim($uuid);
        if (strlen($uuid) === 32 && strpos($uuid, '-') === false) {
            $uuid = substr($uuid, 0, 8) . '-'
                . substr($uuid, 8, 4) . '-'
                . substr($uuid, 12, 4) . '-'
                . substr($uuid, 16, 4) . '-'
                . substr($uuid, 20);
        }
        return strtolower($uuid);
    }

    /**
     * Validasi format UUID v4 (8-4-4-4-12).
     *
     * @param  string $uuid
     * @return bool
     */
    private function _validateUUIDFormat($uuid)
    {
        return (bool)preg_match(
            '/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/',
            strtolower($uuid)
        );
    }

    // =========================================================================
    // PUBLIC METHODS — QR TOKEN
    // =========================================================================

    /**
     * Buat record QR baru di tabel qr_printout.
     *
     * verifyURL = URL LANGSUNG ke file PDF di dedicated server.
     * URL ini yang di-encode ke gambar QR Code.
     * Golang tool akan upload PDF ke path/URL ini.
     *
     * Contoh:
     *   verifyBaseURL = 'https://files.lab.rs.com/reports'
     *   verifyURL     = 'https://files.lab.rs.com/reports/{uuid}.pdf'
     *
     * @param  array $params Wajib:
     *                         - orderHeaderID   (int)    FK ke t_orderheader
     *                         - groupResultName (string) Label group, mis: 'HEMATOLOGI'
     *                         - verifyBaseURL   (string) Base URL folder PDF di dedicated server,
     *                           contoh: 'https://files.lab.rs.com/reports'
     *                           Hasilnya: {verifyBaseURL}/{uuid}.pdf
     *                       Opsional:
     *                         - groupResultID   (int)   default 0
     *                         - testID          (int)   default 0
     *                         - createdByUserID (int)   default 0
     * @return array [
     *   'success'        => bool,
     *   'uuid'           => string|null,  // 36-char dengan hyphen
     *   'uuid_short'     => string|null,  // 32-char tanpa hyphen
     *   'verifyURL'      => string|null,  // URL PDF final = yang di-encode ke QR Code
     *   'qr_printout_id' => int|null, 
     *   'message'        => string
     * ]
     */
    public function saveQRPrintout(array $params)
    {
        $required = ['orderHeaderID', 'groupResultName', 'verifyBaseURL', 'QR_PrintOutReportURL'];
        foreach ($required as $field) {
            if (empty($params[$field])) {
                return [
                    'success' => false,
                    'uuid' => null,
                    'uuid_short' => null,
                    'verifyURL' => null,
                    'qr_printout_id' => null,
                    'message' => "Parameter '{$field}' wajib diisi.",
                ];
            }
        }

        $uuid = $this->_generateUUID(true);
        $uuidShort = str_replace('-', '', $uuid);

        // verifyURL = URL langsung ke PDF: {base}/{uuid}.pdf
        // Golang akan upload PDF ke path ini di dedicated server
        $verifyURL = rtrim($params['verifyBaseURL'], '/') . '/' . str_replace('-', '', $uuid) . '.pdf';

        $data = [
            'QR_PrintOutT_OrderHeaderID' => (int)$params['orderHeaderID'],
            'QR_PrintOutGroup_ResultID' => (int)($params['groupResultID'] ?? 0),
            'QR_PrintOutT_TestID' => (int)($params['testID'] ?? 0),
            'QR_PrintOutGroup_ResultName' => $params['groupResultName'],
            'QR_PrintOutUUID' => $uuid,
            'QR_PrintOutVerifyURL'         => $verifyURL,   // URL final PDF = yang di-encode ke QR Code
            'QR_PrintOutReportURL'         => $params['QR_PrintOutReportURL'], // URL sumber PDF di PHP server (Golang fetch dari sini)
            'QR_PrintOutTempFilePath' => '',
            'QR_PrintOutUploadStatus' => 'pending',
            'QR_PrintOutRetryCount' => 0,
            'QR_PrintOutLastRetryAt' => null,
            'QR_PrintOutUploadedAt' => null,
            'QR_PrintOutCreatedAt' => date('Y-m-d H:i:s'),
            'QR_PrintOutCreatedByUserID' => (int)($params['createdByUserID'] ?? 0),
            'QR_PrintOutIsActive' => 1,
        ];

        $this->db_smartone->insert('qr_printout', $data);

        if ($this->db_smartone->affected_rows() === 0) {
            return [
                'success' => false,
                'uuid' => null,
                'uuid_short' => null,
                'verifyURL' => null,
                'qr_printout_id' => null,
                'message' => 'Gagal menyimpan data QR Printout ke database.',
            ];
        }

        return [
            'success' => true,
            'uuid' => $uuid,
            'uuid_short' => $uuidShort,
            'verifyURL' => $verifyURL, // ini yang di-encode ke gambar QR Code
            'qr_printout_id' => $this->db_smartone->insert_id(),
            'message' => 'OK',
        ];
    }

    /**
     * Nonaktifkan QR Code (misal karena hasil direvisi dan QR lama tidak boleh diakses).
     *
     * @param  string $uuid
     * @return bool
     */
    public function deactivateQR($uuid)
    {
        $uuid = $this->_normalizeUUID($uuid);
        $this->db_smartone->where('QR_PrintOutUUID', $uuid)
            ->update('qr_printout', ['QR_PrintOutIsActive' => 0]);
        return $this->db_smartone->affected_rows() > 0;
    }

    // =========================================================================
    // PUBLIC METHODS — QR IMAGE
    // =========================================================================

    /**
     * Generate QR Code sebagai Base64 PNG string.
     * Hasil bisa langsung di-embed ke HTML/PDF: <img src="{hasil}">
     *
     * @param  string $url        URL yang akan di-encode (verifyURL dari saveQRPrintout)
     * @param  int    $pixelSize  Ukuran pixel per modul (1–10), default 5
     * @param  string $errorLevel Koreksi error: L, M, Q, H (default H)
     * @return string             "data:image/png;base64,..." atau '' jika gagal
     */
    public function generateQRImageBase64($url, $pixelSize = 5, $errorLevel = 'H')
    {
        $errorLevel = in_array($errorLevel, ['L', 'M', 'Q', 'H']) ? $errorLevel : 'H';
        $pixelSize = min(max((int)$pixelSize, 1), 10);

        ob_start();
        QRcode::png($url, false, $errorLevel, $pixelSize, 2);
        $imgData = ob_get_clean();

        return empty($imgData) ? '' : 'data:image/png;base64,' . base64_encode($imgData);
    }

    /**
     * Generate QR Code dan simpan sebagai file PNG di disk.
     *
     * @param  string $url        URL yang akan di-encode
     * @param  string $savePath   Path lengkap tujuan, misal: FCPATH.'qrcodes/abc.png'
     * @param  int    $pixelSize  Ukuran pixel per modul (1–10), default 5
     * @param  string $errorLevel Koreksi error: L, M, Q, H (default H)
     * @return bool               true jika berhasil disimpan
     */
    public function generateQRImageFile($url, $savePath, $pixelSize = 5, $errorLevel = 'H')
    {
        $errorLevel = in_array($errorLevel, ['L', 'M', 'Q', 'H']) ? $errorLevel : 'H';
        $pixelSize = min(max((int)$pixelSize, 1), 10);

        $dir = dirname($savePath);
        if (!is_dir($dir)) {
            mkdir($dir, 0755, true);
        }

        QRcode::png($url, $savePath, $errorLevel, $pixelSize, 2);
        return file_exists($savePath);
    }

    // =========================================================================
    // PUBLIC METHODS — PDF TEMP & GOLANG CALLBACK
    // =========================================================================

    // =========================================================================
    // PUBLIC METHODS — GOLANG UPLOAD TOOL SUPPORT
    // =========================================================================

    /**
     * Ambil daftar record yang BELUM diupload ke dedicated server.
     * Dipakai oleh Golang upload tool sebagai polling.
     *
     * Hanya mengambil record dengan:
     *   - UploadStatus = 'pending' ATAU 'failed' (masih bisa retry)
     *   - RetryCount < 3
     *   - IsActive = 1
     *   - QR_PrintOutReportURL tidak kosong (PDF sudah tersedia di PHP server)
     *
     * Field penting untuk Golang dari setiap row:
     *   - QR_PrintOutUUID       : identifier
     *   - QR_PrintOutVerifyURL  : URL TUJUAN upload di dedicated server
     *   - QR_PrintOutReportURL  : URL SUMBER PDF di PHP server (Golang fetch dari sini)
     *   - QR_PrintOutTempFilePath: path lokal file PDF (opsional, jika Golang akses lokal)
     *
     * @param  int $limit Jumlah maksimal record (default 10)
     * @return array
     */
    public function getPendingUploads($limit = 10)
    {
        return $this->db_smartone
            ->where_in('QR_PrintOutUploadStatus', ['pending', 'failed'])
            ->where('QR_PrintOutRetryCount <', 3)
            ->where('QR_PrintOutIsActive', 1)
            ->where('QR_PrintOutReportURL !=', '') // pastikan PDF sudah siap
            ->order_by('QR_PrintOutCreatedAt', 'ASC')
            ->limit((int)$limit)
            ->get('qr_printout')
            ->result_array();
    }

    /**
     * Catat bahwa satu percobaan upload gagal dan tambah retry count.
     *
     * - Jika RetryCount setelah increment < 3  → status tetap 'failed' (akan dicoba lagi)
     * - Jika RetryCount setelah increment >= 3 → status menjadi 'failed_permanent'
     *   (tidak akan diambil oleh getPendingUploads() lagi)
     *
     * Dipanggil oleh Golang tool saat upload ke dedicated server gagal.
     *
     * @param  string $uuid
     * @return array [
     *   'success'      => bool,
     *   'retry_count'  => int,    // retry count setelah increment
     *   'is_permanent' => bool,   // true = sudah melebihi batas, tidak akan di-retry lagi
     *   'message'      => string
     * ]
     */
    public function incrementRetry($uuid)
    {
        $uuid = $this->_normalizeUUID($uuid);

        if (!$this->_validateUUIDFormat($uuid)) {
            return ['success' => false, 'retry_count' => 0, 'is_permanent' => false,
                'message' => 'Format UUID tidak valid.'];
        }

        $qrRow = $this->db_smartone
            ->select('QR_PrintOutRetryCount, QR_PrintOutUploadStatus')
            ->where('QR_PrintOutUUID', $uuid)
            ->get('qr_printout')
            ->row_array();

        if (!$qrRow) {
            return ['success' => false, 'retry_count' => 0, 'is_permanent' => false,
                'message' => 'UUID tidak ditemukan.'];
        }

        $newRetryCount = (int)$qrRow['QR_PrintOutRetryCount'] + 1;
        $isPermanent = $newRetryCount >= 3;
        $newStatus = $isPermanent ? 'failed_permanent' : 'failed';

        $this->db_smartone->where('QR_PrintOutUUID', $uuid)
            ->update('qr_printout', [
            'QR_PrintOutRetryCount' => $newRetryCount,
            'QR_PrintOutLastRetryAt' => date('Y-m-d H:i:s'),
            'QR_PrintOutUploadStatus' => $newStatus,
        ]);

        return [
            'success' => true,
            'retry_count' => $newRetryCount,
            'is_permanent' => $isPermanent,
            'message' => $isPermanent
            ? "Retry count mencapai {$newRetryCount}. Status menjadi 'failed_permanent'. Upload otomatis dihentikan."
            : "Retry count: {$newRetryCount}/3. Akan dicoba kembali.",
        ];
    }

    /**
     * Minta upload ulang (re-upload) untuk satu record.
     *
     * Gunakan fungsi ini ketika:
     *   (a) File PDF di dedicated server sudah dihapus / kadaluarsa, ATAU
     *   (b) Record sebelumnya 'failed_permanent' dan ingin dicoba ulang secara manual
     *
     * Fungsi ini akan:
     *   - Reset UploadStatus → 'pending'
     *   - Reset RetryCount   → 0
     *   - Kosongkan ReportURL (file lama di dedicated server sudah tidak valid)
     *   - Wajib diikuti dengan saveTempPDF() untuk menyiapkan file PDF baru
     *
     * @param  string $uuid
     * @return array ['success' => bool, 'message' => string]
     */
    public function requestReUpload($uuid)
    {
        $uuid = $this->_normalizeUUID($uuid);

        if (!$this->_validateUUIDFormat($uuid)) {
            return ['success' => false, 'message' => 'Format UUID tidak valid.'];
        }

        $exists = $this->db_smartone
            ->where('QR_PrintOutUUID', $uuid)
            ->count_all_results('qr_printout');

        if ($exists === 0) {
            return ['success' => false, 'message' => 'UUID tidak ditemukan.'];
        }

        $this->db_smartone->where('QR_PrintOutUUID', $uuid)
            ->update('qr_printout', [
            'QR_PrintOutUploadStatus' => 'pending',
            'QR_PrintOutRetryCount' => 0,
            'QR_PrintOutLastRetryAt' => null,
            'QR_PrintOutUploadedAt' => null,
            'QR_PrintOutTempFilePath' => '', // harus diisi ulang via saveTempPDF()
        ]);

        if ($this->db_smartone->affected_rows() === 0) {
            return ['success' => false, 'message' => 'Gagal update database.'];
        }

        return [
            'success' => true,
            'message' => 'Record di-reset ke pending. Panggil saveTempPDF() untuk menyiapkan PDF baru.',
        ];
    }

    

    /**
     * Konfirmasi bahwa Golang berhasil upload PDF ke dedicated server.
     *
     * URL QR_PrintOutVerifyURL tidak berubah (sudah fix sejak saveQRPrintout).
     * Fungsi ini hanya mengubah status → 'uploaded'.
     *
     * Alur Golang:
     *   1. Poll getPendingUploads() → dapat row dengan:
     *        QR_PrintOutReportURL  (fetch PDF dari PHP server via HTTP)
     *        QR_PrintOutVerifyURL  (upload PDF ke dedicated server di path ini)
     *   2. Download PDF dari QR_PrintOutReportURL
     *   3. Upload ke dedicated server sesuai QR_PrintOutVerifyURL
     *   4. Callback PHP: confirmUpload($uuid)
     *
     * @param  string $uuid UUID record qr_printout
     * @return array ['success' => bool, 'message' => string]
     */
    public function confirmUpload($uuid)
    {
        $uuid = $this->_normalizeUUID($uuid);

        if (!$this->_validateUUIDFormat($uuid)) {
            return ['success' => false, 'message' => 'Format UUID tidak valid.'];
        }

        $exists = $this->db_smartone
            ->where('QR_PrintOutUUID', $uuid)
            ->count_all_results('qr_printout');

        if ($exists === 0) {
            return ['success' => false, 'message' => 'UUID tidak ditemukan di database.'];
        }

        $this->db_smartone->where('QR_PrintOutUUID', $uuid)
            ->update('qr_printout', [
            'QR_PrintOutUploadStatus' => 'uploaded',
            'QR_PrintOutUploadedAt' => date('Y-m-d H:i:s'),
        ]);

        if ($this->db_smartone->affected_rows() === 0) {
            return ['success' => false, 'message' => 'Gagal update database.'];
        }

        return ['success' => true, 'message' => 'OK'];
    }

    /**
     * Tandai upload gagal permanen tanpa menambah retry count.
     * Gunakan ini hanya untuk override manual (mis. admin force-fail).
     * Untuk kasus normal, gunakan incrementRetry() agar retry count terlacak.
     *
     * @param  string $uuid
     * @return bool
     */
    public function markUploadFailed($uuid)
    {
        $uuid = $this->_normalizeUUID($uuid);
        $this->db_smartone->where('QR_PrintOutUUID', $uuid)
            ->update('qr_printout', [
            'QR_PrintOutUploadStatus' => 'failed_permanent',
            'QR_PrintOutRetryCount' => 3,
        ]);
        return $this->db_smartone->affected_rows() > 0;
    }

    /**
     * Reset URL report (untuk upload ulang jika laporan direvisi).
     * @deprecated Gunakan requestReUpload() yang lebih lengkap.
     *
     * @param  string $uuid
     * @return array ['success' => bool, 'message' => string]
     */
    public function resetReportURL($uuid)
    {
        return $this->requestReUpload($uuid);
    }

    // =========================================================================
    // PUBLIC METHODS — VERIFIKASI (dipakai dedicated server / controller publik)
    // =========================================================================

    /**
     * Ambil URL PDF report berdasarkan UUID.
     *
     * Dipakai jika PHP app perlu tahu URL PDF (mis. untuk redirect).
     * Scan tracking dihandle oleh dedicated server.
     *
     * @param  string $uuid UUID (36 atau 32 char)
     * @return array [
     *   'success'    => bool,
     *   'report_url' => string|null,
     *   'qr_info'    => array|null,
     *   'message'    => string
     * ]
     */
    public function getReportURL($uuid)
    {
        $uuid = $this->_normalizeUUID($uuid);

        if (!$this->_validateUUIDFormat($uuid)) {
            return ['success' => false, 'report_url' => null, 'qr_info' => null,
                'message' => 'Format UUID tidak valid.'];
        }

        $qrRow = $this->db_smartone
            ->where('QR_PrintOutUUID', $uuid)
            ->where('QR_PrintOutIsActive', 1)
            ->get('qr_printout')
            ->row_array();

        if (!$qrRow) {
            return ['success' => false, 'report_url' => null, 'qr_info' => null,
                'message' => 'QR Code tidak ditemukan atau sudah tidak aktif.'];
        }

        // verifyURL = URL langsung ke PDF, hanya valid jika sudah ter-upload
        if ($qrRow['QR_PrintOutUploadStatus'] !== 'uploaded') {
            $status = $qrRow['QR_PrintOutUploadStatus'];
            $msg = $status === 'failed_permanent'
                ? 'Upload PDF gagal permanen. Hubungi admin laboratorium.'
                : 'Report PDF sedang diproses. Coba beberapa saat lagi.';
            return ['success' => false, 'report_url' => null, 'qr_info' => $qrRow, 'message' => $msg];
        }

        return [
            'success' => true,
            'report_url' => $qrRow['QR_PrintOutVerifyURL'], // URL langsung ke PDF
            'qr_info' => $qrRow,
            'message' => 'OK',
        ];
    }

    // =========================================================================
    // LEGACY / UTILITY
    // =========================================================================

    function clean_mysqli_connection($dbc)
    {
        while (mysqli_more_results($dbc)) {
            if (mysqli_next_result($dbc)) {
                $result = mysqli_use_result($dbc);
                if (get_class($result) == 'mysqli_stmt') {
                    mysqli_stmt_free_result($result);
                }
                else {
                    unset($result);
                }
            }
        }
    }
}