<?php

class Qr_report_uploader extends MY_Controller
{
    var $db_onedev;
    var $db_log;

    public function __construct()
    {
        parent::__construct();
        $this->db_onedev = $this->load->database('onedev', true);
        $this->db_log = $this->load->database('one_lab_log', true);
    }

    public function index()
    {
        echo "QR report uploader tool";
    }

    public function run($limit = 10)
    {
        $limit = (int)$limit;
        if ($limit <= 0) {
            $limit = 10;
        }

        $endpointUrl = $this->get_active_endpoint_url();
        if ($endpointUrl === '') {
            $this->reply_result([
                'status' => 'ERR',
                'message' => 'QR_ReportEndpointUrl aktif tidak ditemukan.',
            ]);
            return;
        }

        $rows = $this->get_pending_rows($limit);
        $summary = [
            'endpoint_url' => $endpointUrl,
            'limit' => $limit,
            'total_pending' => count($rows),
            'uploaded' => 0,
            'failed' => 0,
            'failed_permanent' => 0,
            'skipped' => 0,
            'details' => [],
        ];

        foreach ($rows as $row) {
            $result = $this->process_row($row, $endpointUrl);
            $summary['details'][] = $result;

            if ($result['status'] === 'uploaded') {
                $summary['uploaded']++;
            } elseif ($result['status'] === 'failed') {
                $summary['failed']++;
            } elseif ($result['status'] === 'failed_permanent') {
                $summary['failed_permanent']++;
            } else {
                $summary['skipped']++;
            }
        }

        $this->reply_result([
            'status' => 'OK',
            'data' => $summary,
        ]);
    }

    private function get_pending_rows($limit)
    {
        $sql = "SELECT QR_PrintOutID,
                QR_PrintOutT_OrderHeaderID,
                QR_PrintOutUUID,
                QR_PrintOutVerifyURL,
                QR_PrintOutReportURL,
                QR_PrintOutUploadStatus,
                QR_PrintOutRetryCount
                FROM qr_printout
                WHERE QR_PrintOutIsActive = 1
                AND (QR_PrintOutUploadStatus = 'pending' OR QR_PrintOutUploadStatus = 'failed')
                AND QR_PrintOutRetryCount < 3
                AND QR_PrintOutReportURL IS NOT NULL
                AND QR_PrintOutReportURL != ''
                ORDER BY QR_PrintOutCreatedAt ASC
                LIMIT ?";
        $qry = $this->db_onedev->query($sql, [$limit]);
        if (!$qry) {
            $this->reply_result([
                'status' => 'ERR',
                'message' => 'Gagal mengambil daftar pending.',
                'db_error' => $this->db_onedev->error(),
            ]);
            exit;
        }
        return $qry->result_array();
    }

    private function get_active_endpoint_url()
    {
        $sql = "SELECT QR_ReportEndpointUrl
                FROM qr_report_endpoint
                WHERE QR_ReportEndpointIsActive = 'Y'
                LIMIT 1";
        $qry = $this->db_onedev->query($sql);
        if (!$qry) {
            return '';
        }

        $row = $qry->row_array();
        if (!$row || empty($row['QR_ReportEndpointUrl'])) {
            return '';
        }

        return rtrim($row['QR_ReportEndpointUrl'], '/') . '/';
    }

    private function process_row($row, $endpointUrl)
    {
        $printoutID = (int)$row['QR_PrintOutID'];
        $orderHeaderID = (int)$row['QR_PrintOutT_OrderHeaderID'];
        $reportUrl = $row['QR_PrintOutReportURL'];

        $pdfContent = $this->download_file($reportUrl);
        if ($pdfContent === false) {
            return $this->mark_failed($row, $orderHeaderID, '', 'DOWNLOAD_FAILED');
        }

        if (strpos($pdfContent, '%PDF') === false) {
            return $this->mark_failed($row, $orderHeaderID, '', 'INVALID_PDF');
        }

        $payload = json_encode([
            'qrcode' => $row['QR_PrintOutUUID'],
            'url' => $row['QR_PrintOutReportURL'],
            'type' => 'pdf',
            'name' => $row['QR_PrintOutUUID'] . '.pdf',
            'base64_file' => base64_encode($pdfContent),
        ], JSON_UNESCAPED_SLASHES);

        $response = $this->post_json($endpointUrl . 'upload', $payload, "secure-token-libCBxciByZXBvcnQ=");
        $decoded = json_decode($response, true);

        if (is_array($decoded) && isset($decoded['status']) && $decoded['status'] === 'OK') {
            $this->log_insert_qr($printoutID, $orderHeaderID, $payload, $response);
            $this->db_onedev->query(
                "UPDATE qr_printout
                 SET QR_PrintOutUploadStatus = 'uploaded',
                     QR_PrintOutUploadedAt = NOW()
                 WHERE QR_PrintOutID = ?",
                [$printoutID]
            );

            return [
                'printout_id' => $printoutID,
                'order_header_id' => $orderHeaderID,
                'status' => 'uploaded',
                'message' => 'Upload berhasil',
            ];
        }

        return $this->mark_failed($row, $orderHeaderID, $payload, $response);
    }

    private function mark_failed($row, $orderHeaderID, $payload, $response)
    {
        $printoutID = (int)$row['QR_PrintOutID'];
        $retry = (int)$row['QR_PrintOutRetryCount'] + 1;
        $newStatus = $retry >= 3 ? 'failed_permanent' : 'failed';

        if ($payload !== '' || $response !== '') {
            $this->log_insert_qr($printoutID, $orderHeaderID, $payload, $response);
        }

        $this->db_onedev->query(
            "UPDATE qr_printout
             SET QR_PrintOutUploadStatus = ?,
                 QR_PrintOutRetryCount = ?,
                 QR_PrintOutLastRetryAt = NOW()
             WHERE QR_PrintOutID = ?",
            [$newStatus, $retry, $printoutID]
        );

        return [
            'printout_id' => $printoutID,
            'order_header_id' => $orderHeaderID,
            'status' => $newStatus,
            'message' => is_string($response) ? $response : 'Upload gagal',
        ];
    }

    private function log_insert_qr($printoutID, $orderHeaderID, $json, $response)
    {
        $sql = "INSERT INTO one_lab_log.log_qr_printout(
                Log_QR_PrintOutQR_PrintOutID,
                Log_QR_PrintOutT_OrderHeaderID,
                Log_QR_PrintOutJSON,
                Log_QR_PrintOutResponse,
                Log_QR_PrintOutDateTime
            ) VALUES(?,?,?,?,NOW())";
        $this->db_onedev->query($sql, [
            $printoutID,
            $orderHeaderID,
            $json,
            $response,
        ]);
    }

    private function post_json($url, $data, $token)
    {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Type: application/json',
            'Content-Length: ' . strlen($data),
            "Authorization: Bearer {$token}",
        ]);
        $result = curl_exec($ch);

        if (curl_error($ch) !== '') {
            $error = curl_error($ch);
            curl_close($ch);
            return "ERROR API [{$url}] : {$error}";
        }

        curl_close($ch);
        return $result;
    }

    private function download_file($url)
    {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

        $result = curl_exec($ch);
        if (curl_error($ch)) {
            curl_close($ch);
            return false;
        }

        curl_close($ch);
        return $result;
    }

    private function reply_result($result)
    {
        if ($this->input->is_cli_request()) {
            echo json_encode($result, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . PHP_EOL;
            return;
        }

        echo json_encode($result);
    }
}