<?php
class TopazApiClient {
    private $apiKey;
    
    public function __construct($apiKey) {
        $this->apiKey = $apiKey;
        Logger::log('API Client initialized');
    }
    
    private function makeRequest($endpoint, $method = 'GET', $data = null) {
        $url = Config::API_BASE_URL . $endpoint;
        $curl = curl_init();
        
        $headers = [
            'X-API-Key: ' . $this->apiKey,
            'Accept: application/json',
            'Content-Type: application/json'
        ];
        
        $options = [
            CURLOPT_URL => $url,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_HTTPHEADER => $headers,
            CURLOPT_CUSTOMREQUEST => $method
        ];
        
        if ($data && in_array($method, ['POST', 'PATCH'])) {
            $options[CURLOPT_POSTFIELDS] = json_encode($data);
        }
        
        curl_setopt_array($curl, $options);
        
        Logger::log("Making $method request to: $url");
        if ($data) {
            Logger::log("Request payload: " . json_encode($data, JSON_PRETTY_PRINT));
        }
        $response = curl_exec($curl);
        $statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
        
        if ($error = curl_error($curl)) {
            Logger::log("cURL Error: $error", 'ERROR');
            throw new Exception("API request failed: $error");
        }
        
        curl_close($curl);
        Logger::log("API Response (Status: $statusCode): " . substr($response, 0, 200) . '...');
        
        return json_decode($response, true);
    }
    
    public function createVideoRequest($videoInfo) {
        return $this->makeRequest('', 'POST', $videoInfo);
    }
    
    public function acceptVideoRequest($requestId) {
        return $this->makeRequest("$requestId/accept", 'PATCH');
    }
    
    public function completeUpload($requestId, $uploadResults) {
        return $this->makeRequest("$requestId/complete-upload/", 'PATCH', [
            'uploadResults' => $uploadResults
        ]);
    }
    
    public function getStatus($requestId) {
        return $this->makeRequest("$requestId/status");
    }
}

// uploader.php
class VideoUploader {
    private $apiClient;
    
    public function __construct($apiClient) {
        $this->apiClient = $apiClient;
    }
    
    public function processUpload($file) {
        Logger::log('Starting video upload process');
        
        // Get video information
        $videoInfo = $this->getVideoInfo($file);
        
        // Create enhancement request
        $request = $this->apiClient->createVideoRequest($videoInfo);
        $requestId = $request['requestId'];
        Logger::log("Enhancement request created: $requestId");
        
        // Accept the request and get upload URLs
        $acceptResponse = $this->apiClient->acceptVideoRequest($requestId);
        $uploadUrls = $acceptResponse['urls'];
        
        // Upload file parts
        $uploadResults = $this->uploadParts($file, $uploadUrls);
        
        // Complete the upload
        $this->apiClient->completeUpload($requestId, $uploadResults);
        Logger::log('Upload completed successfully');
        
        return $requestId;
    }
    
    private function getVideoInfo($file) {
        // Get video metadata using FFmpeg or similar tool
        // This is a simplified example
        return [
            'source' => [
                'container' => 'mp4',
                'size' => filesize($file['tmp_name']),
                'duration' => 0, // Should be calculated
                'frameCount' => 0, // Should be calculated
                'frameRate' => 30,
                'resolution' => [
                    'width' => 1920,
                    'height' => 1080
                ]
            ],
            'filters' => [
                [
                    'model' => 'prob-4',
                    'videoType' => 'Progressive',
                    'auto' => 'Auto'
                ]
            ],
            'output' => [
                'resolution' => [
                    'width' => 1920,
                    'height' => 1080
                ],
                'frameRate' => 30,
                'audioCodec' => 'AAC',
                'audioTransfer' => 'Copy',
                'container' => 'mp4'
            ]
        ];
    }
    
    private function uploadParts($file, $urls) {
        $results = [];
        $fileSize = filesize($file['tmp_name']);
        $partSize = ceil($fileSize / count($urls));
        
        foreach ($urls as $index => $url) {
            $partNum = $index + 1;
            $start = $index * $partSize;
            
            // Upload the part and get ETag
            $eTag = $this->uploadFilePart($file['tmp_name'], $url, $start, $partSize);
            
            $results[] = [
                'partNum' => $partNum,
                'eTag' => $eTag
            ];
            
            Logger::log("Uploaded part $partNum with ETag: $eTag");
        }
        
        return $results;
    }
    
    private function uploadFilePart($filePath, $url, $start, $length) {
        // Implementation of multipart upload
        // Returns ETag from S3 response
        return "dummy-etag-" . uniqid();
    }
}
?>