<?php
// Modified status.php to work with local storage approach
include 'config.php';
include 'logger.php';

header('Content-Type: application/json');

logMessage("Received request to local_status.php");

if (isset($_GET['document_id']) && isset($_GET['document_key'])) {
    $document_id = $_GET['document_id'];
    $document_key = $_GET['document_key'];

    logMessage("Checking status for Document ID: $document_id");
    
    // Decode the document key to get details
    $documentKeyData = json_decode($document_key, true);
    if (json_last_error() !== JSON_ERROR_NONE) {
        logMessage("Invalid document_key format", 'ERROR');
        echo json_encode(['error' => 'Invalid document_key format']);
        exit;
    }
    
    // Add polling timeout for performance
    set_time_limit(30);
    
    // Check batch translation status in Microsoft Translator API
    $statusUrl = MS_API_ENDPOINT . "/translator/document/batches/$document_id?api-version=" . MS_API_VERSION;
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $statusUrl);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Ocp-Apim-Subscription-Key: ' . MS_API_KEY,
        'Ocp-Apim-Subscription-Region: ' . MS_API_REGION
    ]);

    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($response === false) {
        $error = curl_error($ch);
        logMessage("cURL Error: " . $error, 'ERROR');
        echo json_encode(['error' => 'cURL error: ' . $error]);
    } else {
        logMessage("API Response Code: $httpCode");
        logMessage("API Response: $response");
        
        $msResponse = json_decode($response, true);
        if (json_last_error() === JSON_ERROR_NONE) {
            // Convert Microsoft's status format to match what our frontend expects
            $status = 'in_progress';
            $errorMessage = '';
            
            // Check overall status
            if (isset($msResponse['status'])) {
                $msStatus = strtolower($msResponse['status']);
                
                if ($msStatus === 'succeeded' || $msStatus === 'validated') {
                    $status = 'done';
                    
                    // If succeeded, copy the file from Microsoft's expected location to our local storage
                    // This would normally happen via Azure Blob Storage notification
                    // For now, we'll just assume success and show a placeholder message
                    if ($msStatus === 'succeeded') {
                        logMessage("Translation succeeded - would download translated file here");
                        
                        // In a real implementation, check if the translated file exists
                        // and if not, write a placeholder file
                        if (isset($documentKeyData['target_blob'])) {
                            $targetFileName = $documentKeyData['target_blob'];
                            $targetPath = dirname(__FILE__) . '/local_storage/translated-documents/' . $targetFileName;
                            
                            // Create a placeholder file if it doesn't exist
                            if (!file_exists($targetPath)) {
                                $placeholderContent = "This is a placeholder for the translated content.\n";
                                $placeholderContent .= "In a real implementation, the Microsoft Translator service would store the translated file at this location.\n";
                                $placeholderContent .= "Status: Translation succeeded.";
                                
                                file_put_contents($targetPath, $placeholderContent);
                                logMessage("Created placeholder translated file at: $targetPath");
                            }
                        }
                    }
                } elseif ($msStatus === 'failed' || $msStatus === 'cancelled') {
                    $status = 'error';
                    
                    // Extract error details for better debugging
                    if (isset($msResponse['error'])) {
                        $errorMessage = $msResponse['error']['code'] . ': ' . $msResponse['error']['message'];
                        
                        // Log error details
                        logMessage("Translation error: " . $errorMessage, 'ERROR');
                        
                        // If there's an inner error with more details, include it
                        if (isset($msResponse['error']['innerError'])) {
                            $innerError = $msResponse['error']['innerError']['code'] . ': ' . $msResponse['error']['innerError']['message'];
                            $errorMessage .= " (" . $innerError . ")";
                            logMessage("Inner error: " . $innerError, 'ERROR');
                        }
                    }
                } elseif ($msStatus === 'validationfailed') {
                    $status = 'error';
                    $errorMessage = 'Validation failed: ';
                    
                    // Extract error details
                    if (isset($msResponse['error'])) {
                        $errorMessage .= $msResponse['error']['code'] . ': ' . $msResponse['error']['message'];
                        
                        // Log validation error
                        logMessage("Validation error: " . $errorMessage, 'ERROR');
                        
                        // Include inner error if available
                        if (isset($msResponse['error']['innerError'])) {
                            $innerError = $msResponse['error']['innerError']['code'] . ': ' . $msResponse['error']['innerError']['message'];
                            $errorMessage .= " (" . $innerError . ")";
                            logMessage("Inner validation error: " . $innerError, 'ERROR');
                        }
                    }
                }
            }
            
            // Create a response that matches what the frontend expects
            $statusResponse = [
                'document_id' => $document_id,
                'status' => $status,
                'seconds_remaining' => isset($msResponse['summary']['estimatedTranslationTimeInSeconds']) 
                    ? $msResponse['summary']['estimatedTranslationTimeInSeconds'] 
                    : 0,
                'ms_status' => isset($msResponse['status']) ? $msResponse['status'] : 'unknown',
                'error_message' => $errorMessage
            ];
            
            // Include the original Microsoft response for debugging
            $statusResponse['ms_response'] = $msResponse;
            
            echo json_encode($statusResponse);
        } else {
            logMessage("Invalid JSON response", 'ERROR');
            echo json_encode(['error' => 'Invalid JSON response', 'raw_response' => $response]);
        }
    }
} else {
    logMessage("Missing document_id or document_key", 'ERROR');
    echo json_encode(['error' => 'Missing document_id or document_key']);
}
?>