<?php

namespace App\Core;

/**
 * Cloud Storage - رفع الملفات إلى السحابة
 * يدعم AWS S3 و Google Cloud Storage
 */
class CloudStorage
{
    private string $provider;
    private array $config;
    private Logger $logger;

    public function __construct(string $provider, array $config, Logger $logger)
    {
        $this->provider = $provider;
        $this->config = $config;
        $this->logger = $logger;
    }

    /**
     * رفع ملف
     */
    public function upload(string $localPath, string $remotePath, array $options = []): bool
    {
        try {
            switch ($this->provider) {
                case 's3':
                    return $this->uploadToS3($localPath, $remotePath, $options);
                case 'gcs':
                    return $this->uploadToGCS($localPath, $remotePath, $options);
                default:
                    $this->logger->error("Unsupported cloud provider: {$this->provider}");
                    return false;
            }
        } catch (\Throwable $e) {
            $this->logger->error("Cloud upload failed", [
                'provider' => $this->provider,
                'error' => $e->getMessage()
            ]);
            return false;
        }
    }

    /**
     * رفع إلى AWS S3
     */
    private function uploadToS3(string $localPath, string $remotePath, array $options): bool
    {
        // استخدام AWS SDK إذا كان متوفراً
        if (class_exists('\Aws\S3\S3Client')) {
            $s3 = new \Aws\S3\S3Client([
                'version' => 'latest',
                'region' => $this->config['region'] ?? 'us-east-1',
                'credentials' => [
                    'key' => $this->config['access_key'] ?? '',
                    'secret' => $this->config['secret_key'] ?? ''
                ]
            ]);

            $result = $s3->putObject([
                'Bucket' => $this->config['bucket'] ?? '',
                'Key' => $remotePath,
                'SourceFile' => $localPath,
                'ACL' => $options['acl'] ?? 'private'
            ]);

            return $result['@metadata']['statusCode'] === 200;
        }

        // Fallback: استخدام cURL
        return $this->uploadToS3WithCurl($localPath, $remotePath, $options);
    }

    /**
     * رفع إلى S3 باستخدام cURL
     */
    private function uploadToS3WithCurl(string $localPath, string $remotePath, array $options): bool
    {
        // TODO: Implement S3 upload with cURL
        $this->logger->warning("S3 upload with cURL not implemented yet");
        return false;
    }

    /**
     * رفع إلى Google Cloud Storage
     */
    private function uploadToGCS(string $localPath, string $remotePath, array $options): bool
    {
        // TODO: Implement GCS upload
        $this->logger->warning("GCS upload not implemented yet");
        return false;
    }

    /**
     * حذف ملف من السحابة
     */
    public function delete(string $remotePath): bool
    {
        try {
            switch ($this->provider) {
                case 's3':
                    return $this->deleteFromS3($remotePath);
                case 'gcs':
                    return $this->deleteFromGCS($remotePath);
                default:
                    return false;
            }
        } catch (\Throwable $e) {
            $this->logger->error("Cloud delete failed", ['error' => $e->getMessage()]);
            return false;
        }
    }

    /**
     * حذف من S3
     */
    private function deleteFromS3(string $remotePath): bool
    {
        if (class_exists('\Aws\S3\S3Client')) {
            $s3 = new \Aws\S3\S3Client([
                'version' => 'latest',
                'region' => $this->config['region'] ?? 'us-east-1',
                'credentials' => [
                    'key' => $this->config['access_key'] ?? '',
                    'secret' => $this->config['secret_key'] ?? ''
                ]
            ]);

            $result = $s3->deleteObject([
                'Bucket' => $this->config['bucket'] ?? '',
                'Key' => $remotePath
            ]);

            return true;
        }

        return false;
    }

    /**
     * حذف من GCS
     */
    private function deleteFromGCS(string $remotePath): bool
    {
        // TODO: Implement
        return false;
    }

    /**
     * جلب URL للوصول إلى الملف
     */
    public function getUrl(string $remotePath, int $expiresIn = 3600): string
    {
        switch ($this->provider) {
            case 's3':
                return $this->getS3Url($remotePath, $expiresIn);
            case 'gcs':
                return $this->getGCSUrl($remotePath, $expiresIn);
            default:
                return '';
        }
    }

    /**
     * جلب S3 URL
     */
    private function getS3Url(string $remotePath, int $expiresIn): string
    {
        $bucket = $this->config['bucket'] ?? '';
        $region = $this->config['region'] ?? 'us-east-1';
        return "https://{$bucket}.s3.{$region}.amazonaws.com/{$remotePath}";
    }

    /**
     * جلب GCS URL
     */
    private function getGCSUrl(string $remotePath, int $expiresIn): string
    {
        $bucket = $this->config['bucket'] ?? '';
        return "https://storage.googleapis.com/{$bucket}/{$remotePath}";
    }
}
