<?php
// Helper functions to interact with Pexels API
function pexels_key() {
  $k = getenv('PEXELS_KEY');
  // Use a default public key if not set in environment
  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 => 20,
    CURLOPT_USERAGENT => 'Flatlogic-Gemini-Agent/1.0'
  ]);
  $resp = curl_exec($ch);
  $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  curl_close($ch);
  if ($code >= 200 && $code < 300 && $resp) {
      return json_decode($resp, true);
  }
  error_log("Pexels API request failed with code $code for URL: $url");
  return null;
}

function download_to($srcUrl, $destPath) {
  $dir = dirname($destPath);
  if (!is_dir($dir)) {
    if (!mkdir($dir, 0775, true)) {
        error_log("Failed to create directory: $dir");
        return false;
    }
  }

  $data = @file_get_contents($srcUrl);
  if ($data === false) {
    error_log("Failed to download image from: $srcUrl");
    return false;
  }
  
  if (file_put_contents($destPath, $data) === false) {
    error_log("Failed to save image to: $destPath");
    return false;
  }
  return true;
}