/**
 * @fileoverview This file provides a utility function for fetching a remote
 * image and encoding it in base64.
 */

/**
 * Fetches an image from a URL and returns
 * its MIME type and base64-encoded data.
 *
 * @param url - The URL of the image to fetch.
 * @returns A promise that resolves to an object containing the MIME type and
 *   base64-encoded image data.
 * @throws Throws an error if the image fetch fails.
 */
export async function fetchAndEncode(url: string) {
  const res = await fetch(url);
  if (!res.ok) throw new Error(`Failed to fetch image: ${url}`);
  const buf = Buffer.from(await res.arrayBuffer());
  const mimeType = res.headers.get('content-type') ?? 'image/png';
  return { mimeType, data: buf.toString('base64') };
}