<?php
// includes/pexels.php
function pexels_key() {
    $k = getenv('PEXELS_KEY');
    return $k && strlen($k) > 0 ? $k : 'Vc99rnmOhHhJAbgGQoKLZtsaIVfkeownoQNbTj78VemUjKh08ZYRbf18';
}
function pexels_get($url) {
    $ch = curl_init();
    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HTTPHEADER => [ 'Authorization: '. pexels_key() ],
        CURLOPT_TIMEOUT => 15,
    ]);
    $resp = curl_exec($ch);
    $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    if ($code >= 200 && $code < 300 && $resp) return json_decode($resp, true);
    return null;
}
function download_to($srcUrl, $destPath) {
    // Ensure the directory exists.
    $dir = dirname($destPath);
    if (!is_dir($dir)) {
        if (!mkdir($dir, 0775, true)) {
            error_log("Failed to create directory: " . $dir);
            return false;
        }
    }

    // Use cURL to download the image, as file_get_contents can be restricted.
    $ch = curl_init($srcUrl);
    $fp = fopen($destPath, 'wb');
    if (!$fp) {
        error_log("Failed to open file for writing: " . $destPath);
        curl_close($ch);
        return false;
    }
    curl_setopt($ch, CURLOPT_FILE, $fp);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 60);
    $result = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    fclose($fp);

    if ($result === false || $httpCode !== 200) {
        error_log("Failed to download image from " . $srcUrl . ". HTTP code: " . $httpCode);
        // Clean up the failed download
        if (file_exists($destPath)) {
            unlink($destPath);
        }
        return false;
    }
    
    return true;
}