<?php
/**
 * OnlyOffice Document Server callback: receive saved document and store in S3.
 * Expects JSON body: status, key, url (when status 2,3,6,7). Returns {"error":0}.
 */

class OnlyOfficeTemplates_OnlyOfficeCallback_Action extends Vtiger_Action_Controller
{
    public function checkPermission(Vtiger_Request $request)
    {
        // Callback is called by Document Server, not by user. We validate by key matching template.
    }

    public function process(Vtiger_Request $request)
    {
        header('Content-Type: application/json; charset=utf-8');
        $raw = file_get_contents('php://input');
        $data = json_decode($raw, true);
        if (!$data || !isset($data['key']) || !isset($data['status'])) {
            echo json_encode(['error' => 1, 'message' => 'Invalid callback body']);
            return;
        }
        $key = $data['key'];
        $status = (int)$data['status'];
        $templateId = (int)$key;
        if ($templateId <= 0) {
            echo json_encode(['error' => 0]);
            return;
        }
        if (!in_array($status, [2, 3, 6, 7], true)) {
            echo json_encode(['error' => 0]);
            return;
        }
        $url = isset($data['url']) ? trim($data['url']) : '';
        if ($url === '') {
            echo json_encode(['error' => 0]);
            return;
        }
        $fileType = isset($data['filetype']) ? strtolower(trim($data['filetype'])) : 'docx';
        if ($fileType !== 'docx') {
            $fileType = 'docx';
        }

        require_once dirname(__DIR__) . '/config.php';
        require_once dirname(__DIR__) . '/resources/S3Helper.php';
        $config = OnlyOfficeTemplates_getConfig();
        $adb = PearDatabase::getInstance();
        $res = $adb->pquery("SELECT id, file_name FROM vtiger_oot_templates WHERE id = ?", [$templateId]);
        $row = $adb->fetchByAssoc($res);
        if (!$row) {
            echo json_encode(['error' => 0]);
            return;
        }

        $fileName = $row['file_name'] ?: ('template_' . $templateId . '.' . $fileType);
        if (pathinfo($fileName, PATHINFO_EXTENSION) !== $fileType) {
            $fileName = pathinfo($fileName, PATHINFO_FILENAME) . '.' . $fileType;
        }
        $s3 = new OnlyOfficeTemplates_S3Helper($config);
        $s3Key = $s3->getTemplateKey($templateId, $fileName);

        $tmpFile = tempnam(sys_get_temp_dir(), 'oot_callback_') . '.' . $fileType;
        try {
            $ctx = stream_context_create(['http' => ['timeout' => 30]]);
            $content = @file_get_contents($url, false, $ctx);
            if ($content === false || strlen($content) === 0) {
                echo json_encode(['error' => 1, 'message' => 'Failed to download document']);
                return;
            }
            file_put_contents($tmpFile, $content);
            $s3->uploadFile($tmpFile, $s3Key, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
            $adb->pquery("UPDATE vtiger_oot_templates SET s3_key = ?, file_name = ? WHERE id = ?", [$s3Key, $fileName, $templateId]);
        } finally {
            @unlink($tmpFile);
        }
        echo json_encode(['error' => 0]);
    }
}