<?php
/**
 * Generate document from template: merge placeholders, optional PDF conversion, download or save to Documents.
 */

class OnlyOfficeTemplates_CreateFromTemplate_Action extends Vtiger_Action_Controller
{
    public function checkPermission(Vtiger_Request $request)
    {
        $record = $request->get('record');
        $module = $request->get('source_module') ?: getSalesEntityType($record);
        if (!isPermitted($module, 'DetailView', $record)) {
            throw new AppException('LBL_PERMISSION_DENIED');
        }
    }

    public function process(Vtiger_Request $request)
    {
        $recordId = (int)$request->get('record');
        $templateId = (int)$request->get('template_id');
        $format = strtolower($request->get('format') ?: 'pdf'); // pdf | docx
        $mode = strtolower($request->get('mode') ?: 'download'); // download | save_to_documents
        $module = $request->get('source_module') ?: getSalesEntityType($recordId);

        if (!$recordId || !$templateId) {
            echo json_encode(['success' => false, 'error' => 'Missing record or template_id']);
            return;
        }

        require_once dirname(__DIR__) . '/models/OnlyOfficeTemplates_Model.php';
        require_once dirname(__DIR__) . '/resources/S3Helper.php';
        require_once dirname(__DIR__) . '/resources/MergeService.php';
        require_once dirname(__DIR__) . '/resources/ConvertService.php';

        $model = new OnlyOfficeTemplates_Model();
        $template = $model->getTemplateById($templateId);
        if (!$template) {
            echo json_encode(['success' => false, 'error' => 'Template not found or access denied']);
            return;
        }
        $config = $model->getConfig();
        $s3 = new OnlyOfficeTemplates_S3Helper($config);
        $mergeService = new OnlyOfficeTemplates_MergeService($s3, $config);
        $convertService = new OnlyOfficeTemplates_ConvertService($config);

        $placeholders = $mergeService->buildPlaceholders($module, $recordId);
        $tempDir = null;
        $docxPath = null;
        $pdfPath = null;

        try {
            $docxPath = $mergeService->mergeToFile($template['s3_key'], $placeholders);
            $tempDir = dirname($docxPath);
            $baseName = pathinfo($template['file_name'], PATHINFO_FILENAME);
            $outExt = ($format === 'pdf') ? 'pdf' : 'docx';
            $outFileName = $baseName . '_' . $recordId . '.' . $outExt;

            if ($format === 'pdf') {
                $docxUrl = $this->putMergedDocxForConversion($s3, $config, $docxPath, $recordId, $templateId);
                if (!$docxUrl) {
                    echo json_encode(['success' => false, 'error' => 'Could not expose DOCX URL for conversion']);
                    return;
                }
                $result = $convertService->convertToPdf($docxUrl, $template['file_name']);
                if (!$result['success']) {
                    echo json_encode(['success' => false, 'error' => $result['error']]);
                    return;
                }
                $pdfPath = $result['pdfPath'];
            }

            if ($mode === 'save_to_documents') {
                $fileToSave = ($format === 'pdf') ? $pdfPath : $docxPath;
                $docId = $this->saveToDocuments($request, $module, $recordId, $fileToSave, $outFileName, $config);
                $this->cleanupTemp($tempDir, $docxPath, $pdfPath);
                echo json_encode(['success' => true, 'document_id' => $docId, 'message' => 'Saved to Documents']);
                return;
            }

            $downloadPath = ($format === 'pdf') ? $pdfPath : $docxPath;
            $mime = ($format === 'pdf') ? 'application/pdf' : 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
            header('Content-Type: ' . $mime);
            header('Content-Disposition: attachment; filename="' . basename($outFileName) . '"');
            header('Content-Length: ' . filesize($downloadPath));
            readfile($downloadPath);
            $this->cleanupTemp($tempDir, $docxPath, $pdfPath);
        } catch (Exception $e) {
            $this->cleanupTemp($tempDir, $docxPath, $pdfPath);
            if ($request->get('ajax')) {
                echo json_encode(['success' => false, 'error' => $e->getMessage()]);
            } else {
                throw $e;
            }
        }
    }

    /**
     * Upload merged DOCX to S3 temp and return public URL for OnlyOffice converter.
     */
    private function putMergedDocxForConversion(OnlyOfficeTemplates_S3Helper $s3, array $config, $localPath, $recordId, $templateId)
    {
        $key = $s3->getTempKey($recordId, $templateId, 'docx');
        $s3->uploadFile($localPath, $key, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
        $bucket = $s3->getBucket();
        $endpoint = $config['s3']['endpoint'] ?? '';
        $base = preg_replace('#^https?://#', 'https://', $endpoint);
        if (empty($base)) {
            $base = 'https://s3.twcstorage.ru';
        }
        return rtrim($base, '/') . '/' . $bucket . '/' . $key;
    }

    /**
     * Save file as Document record and link to parent. Use Documents S3 structure if FilePathManager available.
     */
    private function saveToDocuments(Vtiger_Request $request, $module, $recordId, $localPath, $fileName, array $config)
    {
        $adb = PearDatabase::getInstance();
        $currentUser = Users_Record_Model::getCurrentUserModel();
        $ownerId = $currentUser->getId();
        $docPrefix = $config['documents_s3_prefix'] ?? 'crm2/CRM_Active_Files/Documents';
        $bucket = $config['s3_bucket'] ?? $config['s3']['bucket'];

        $notesId = $adb->getUniqueID('vtiger_crmentity');
        if (!$notesId) {
            $r = $adb->pquery("SELECT MAX(crmid) AS m FROM vtiger_crmentity", []);
            $notesId = (int)$adb->query_result($r, 0, 'm') + 1;
        }

        $title = pathinfo($fileName, PATHINFO_FILENAME);
        $now = date('Y-m-d H:i:s');
        $s3Key = $docPrefix . '/' . $module . '/' . $module . '_' . $recordId . '/' . $title . '_' . $notesId . '.' . pathinfo($fileName, PATHINFO_EXTENSION);

        $s3 = new OnlyOfficeTemplates_S3Helper($config);
        $contentType = (pathinfo($fileName, PATHINFO_EXTENSION) === 'pdf') ? 'application/pdf' : 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
        $s3->uploadFile($localPath, $s3Key, $contentType);

        $fileUrl = 'https://' . ($config['s3']['endpoint'] ?? 's3.twcstorage.ru');
        $fileUrl = preg_replace('#^https?://#', '', $fileUrl);
        $fileUrl = 'https://' . $fileUrl . '/' . $bucket . '/' . $s3Key;
        $fileSize = filesize($localPath);

        $adb->pquery(
            "INSERT INTO vtiger_crmentity (crmid, smownerid, smcreatorid, modifiedby, setype, description, createdtime, modifiedtime, presence, deleted) VALUES (?,?,?,?,?,?,?,?,?,?)",
            [$notesId, $ownerId, $ownerId, $ownerId, 'Documents', '', $now, $now, 1, 0]
        );
        $adb->pquery(
            "INSERT INTO vtiger_notes (notesid, title, filename, filesize, filetype, filelocationtype, filedownloadcount, createdtime, modifiedtime, folderid, notecontent) VALUES (?,?,?,?,?,?,?,?,?,?,?)",
            [$notesId, $title, $fileUrl, $fileSize, $contentType, 'E', 0, $now, $now, 0, '']
        );
        if (method_exists($adb, 'pquery')) {
            $adb->pquery("INSERT INTO vtiger_senotesrel (crmid, notesid) VALUES (?,?)", [$recordId, $notesId]);
        }
        $adb->pquery("INSERT INTO vtiger_notescf (notesid) VALUES (?)", [$notesId]);

        if ($this->hasS3Columns($adb)) {
            $adb->pquery("UPDATE vtiger_notes SET s3_bucket = ?, s3_key = ? WHERE notesid = ?", [$bucket, $s3Key, $notesId]);
        }

        return $notesId;
    }

    private function hasS3Columns($adb)
    {
        static $has = null;
        if ($has === null) {
            $r = @$adb->pquery("SHOW COLUMNS FROM vtiger_notes LIKE 's3_key'", []);
            $has = $r && $adb->num_rows($r) > 0;
        }
        return $has;
    }

    private function cleanupTemp($tempDir, $docxPath, $pdfPath)
    {
        if ($pdfPath && is_file($pdfPath)) {
            @unlink($pdfPath);
        }
        if ($docxPath && is_file($docxPath)) {
            @unlink($docxPath);
        }
        if ($tempDir && is_dir($tempDir)) {
            @rmdir($tempDir);
        }
    }
}