<?php
function logMessage($message, $type = 'INFO') {
    // Enable logging
    $logFile = 'app.log';
    $timestamp = date('Y-m-d H:i:s');
    $logEntry = "[$timestamp] [$type] $message" . PHP_EOL;
    
    file_put_contents($logFile, $logEntry, FILE_APPEND);
    
    // Create a specific debug log for download issues
    if (strpos($message, 'DIRECT DOWNLOAD') !== false || 
        strpos($message, 'PRIORITY') !== false ||
        strpos($message, 'LAST RESORT') !== false ||
        strpos($message, 'downloadTranslatedFile') !== false) {
        $debugLogFile = 'download_debug.log';
        file_put_contents($debugLogFile, $logEntry, FILE_APPEND);
    }
    
    // Also output to console if it's a CLI request
    if (php_sapi_name() === 'cli') {
        echo $logEntry;
    }
}

function logApiCall($url, $method, $headers, $body, $response, $httpCode) {
    // Sanitize headers to remove sensitive information
    $sanitizedHeaders = [];
    foreach ($headers as $header) {
        // Remove API keys from log
        if (strpos($header, 'Subscription-Key') !== false || strpos($header, 'Authorization') !== false) {
            $sanitizedHeaders[] = preg_replace('/(Key|Auth-Key|Authorization):\s*[^\s]+/', '$1: [REDACTED]', $header);
        } else {
            $sanitizedHeaders[] = $header;
        }
    }
    
    // For SAS tokens and connection strings in the body
    $sanitizedBody = $body;
    if (is_array($sanitizedBody)) {
        $json = json_encode($sanitizedBody);
        // Remove SAS tokens from logs
        if (strpos($json, 'sv=') !== false && strpos($json, 'sig=') !== false) {
            $json = preg_replace('/(\?|&)(sv|sig|se|sp|st|spr)=[^&]+/', '$1$2=[REDACTED]', $json);
            $sanitizedBody = json_decode($json, true) ?: $sanitizedBody;
        }
    }
    
    // Truncate response if it's too large
    $sanitizedResponse = $response;
    if (strlen($response) > 1000) {
        $sanitizedResponse = substr($response, 0, 1000) . '... [truncated]';
    }
    
    $logMessage = "API Call:" . PHP_EOL;
    $logMessage .= "URL: $url" . PHP_EOL;
    $logMessage .= "Method: $method" . PHP_EOL;
    $logMessage .= "Headers: " . json_encode($sanitizedHeaders) . PHP_EOL;
    $logMessage .= "Body: " . json_encode($sanitizedBody) . PHP_EOL;
    $logMessage .= "Response Code: $httpCode" . PHP_EOL;
    $logMessage .= "Response: $sanitizedResponse" . PHP_EOL;

    logMessage($logMessage, 'API');
}