<?php
/**
 * Portable S3 helper for OnlyOfficeTemplates (get/put using module config).
 */

class OnlyOfficeTemplates_S3Helper
{
    protected $client;
    protected $bucket;
    protected $prefix;

    public function __construct(array $config)
    {
        $this->bucket = $config['s3_bucket'] ?? ($config['s3']['bucket'] ?? '');
        $this->prefix = rtrim($config['s3_prefix'] ?? 'crm2/OnlyOfficeTemplates', '/');
        if ($this->bucket === null || $this->bucket === '') {
            throw new Exception('OnlyOfficeTemplates: S3 bucket not configured. Set S3_BUCKET in .env or add bucket to crm_extensions/file_storage/config.php (s3.bucket or root bucket).');
        }
        $s3 = $config['s3'] ?? [];
        $path = dirname(dirname(dirname(__DIR__)));
        if (!class_exists('Aws\S3\S3Client')) {
            if (is_file($path . '/vendor/autoload.php')) {
                require_once $path . '/vendor/autoload.php';
            }
        }
        $this->client = new Aws\S3\S3Client([
            'version' => $s3['version'] ?? 'latest',
            'region' => $s3['region'] ?? 'ru-1',
            'endpoint' => $s3['endpoint'],
            'use_path_style_endpoint' => !empty($s3['use_path_style_endpoint']),
            'credentials' => [
                'key' => $s3['key'],
                'secret' => $s3['secret'],
            ],
        ]);
    }

    /**
     * Template S3 key: {prefix}/templates/{templateId}/{fileName}
     */
    public function getTemplateKey($templateId, $fileName)
    {
        return $this->prefix . '/templates/' . (int)$templateId . '/' . $fileName;
    }

    /**
     * Temp generated file key: {prefix}/temp/{recordId}_{templateId}_{timestamp}.ext
     */
    public function getTempKey($recordId, $templateId, $extension)
    {
        return $this->prefix . '/temp/' . (int)$recordId . '_' . (int)$templateId . '_' . time() . '.' . $extension;
    }

    public function getBucket()
    {
        return $this->bucket;
    }

    public function getPrefix()
    {
        return $this->prefix;
    }

    /**
     * Download object to a local file; returns path.
     */
    public function downloadToFile($s3Key, $localPath)
    {
        $this->client->getObject([
            'Bucket' => $this->bucket,
            'Key' => $s3Key,
            'SaveAs' => $localPath,
        ]);
        return $localPath;
    }

    /**
     * Get object body as string.
     */
    public function getObjectBody($s3Key)
    {
        $result = $this->client->getObject([
            'Bucket' => $this->bucket,
            'Key' => $s3Key,
        ]);
        return (string)$result['Body'];
    }

    /**
     * Put string or file into S3.
     */
    public function putObject($s3Key, $body, $contentType = null)
    {
        $params = [
            'Bucket' => $this->bucket,
            'Key' => $s3Key,
            'Body' => $body,
        ];
        if ($contentType) {
            $params['ContentType'] = $contentType;
        }
        $this->client->putObject($params);
    }

    /**
     * Upload local file to S3.
     */
    public function uploadFile($localPath, $s3Key, $contentType = null)
    {
        $params = [
            'Bucket' => $this->bucket,
            'Key' => $s3Key,
            'SourceFile' => $localPath,
        ];
        if ($contentType) {
            $params['ContentType'] = $contentType;
        }
        $this->client->putObject($params);
    }
}