<?php

namespace DJMixHosting;

use Aws\S3\S3Client;
use Aws\Credentials\Credentials;

class CDN
{
    protected $s3Client;
    protected $bucket;
    protected $config;

    public function __construct(array $config)
    {
        $this->config = $config;
        $this->bucket = $config['aws']['s3']['bucket'];

        $credentials = new Credentials(
            $config['aws']['s3']['access_key'],
            $config['aws']['s3']['secret_key']
        );

        $this->s3Client = new S3Client([
            'version'                 => 'latest',
            'region'                  => $config['aws']['s3']['region'],
            'endpoint'                => $config['aws']['s3']['host'],
            'credentials'             => $credentials,
            'use_path_style_endpoint' => true,
            'profile'                 => null,
            'use_aws_shared_config_files' => false,
        ]);
    }

    /**
     * @throws \Exception
     */
    public function uploadFile(string $localPath, string $remotePath, string $mimeType, string $acl = 'private')
    {
        try {
            $result = $this->s3Client->putObject([
                'Bucket'      => $this->bucket,
                'Key'         => $remotePath,
                'SourceFile'  => $localPath,
                'ACL'         => $acl,
                'ContentType' => $mimeType,
            ]);
            return $result;
        } catch (\Exception $e) {
            throw new \Exception("Error uploading file to CDN: " . $e->getMessage());
        }
    }

    /**
     * @throws \Exception
     */
    public function renameFile(string $oldRemotePath, string $newRemotePath)
    {
        // S3 does not support renaming directly. Copy then delete.
        try {
            $this->s3Client->copyObject([
                'Bucket'     => $this->bucket,
                'CopySource' => "{$this->bucket}/{$oldRemotePath}",
                'Key'        => $newRemotePath,
            ]);

            $this->s3Client->deleteObject([
                'Bucket' => $this->bucket,
                'Key'    => $oldRemotePath,
            ]);
        } catch (\Exception $e) {
            throw new \Exception("Error renaming file on CDN: " . $e->getMessage());
        }
    }

    public function clearCache(string $remotePath)
    {
        // If using CloudFront or another CDN in front of S3, implement invalidation logic here.
        // This might involve calling the CloudFront API to invalidate the specific path.
    }
}