export function openPdfBlob(blob: Blob, filename: string, targetWindow?: Window | null) {
  const url = URL.createObjectURL(blob);

  if (targetWindow && !targetWindow.closed) {
    targetWindow.location.href = url;
    setTimeout(() => URL.revokeObjectURL(url), 60_000);
    return true;
  }

  const opened = window.open(url, '_blank');
  if (opened) {
    setTimeout(() => URL.revokeObjectURL(url), 60_000);
    return true;
  }

  const a = document.createElement('a');
  a.href = url;
  a.download = filename;
  document.body.appendChild(a);
  a.click();
  a.remove();
  URL.revokeObjectURL(url);
  return false;
}

/** Force a browser download of a blob under the given filename (no preview tab). */
export function saveBlob(blob: Blob, filename: string) {
  const url = URL.createObjectURL(blob);
  const a = document.createElement('a');
  a.href = url;
  a.download = filename;
  document.body.appendChild(a);
  a.click();
  a.remove();
  // Delay revoke so the download has time to start (esp. for rapid multi-saves).
  setTimeout(() => URL.revokeObjectURL(url), 10_000);
}