export function updateAssetPathsWithRegex(
  input: string,
  baseUrl: string = import.meta.env.VITE_BASE_URL,
): string {
  let output = input;

  if (!baseUrl.endsWith('/')) {
    baseUrl += '/';
  }

  function replacePaths(
    regex: RegExp,
    replacer: (start: string, path: string, end: string) => string,
  ) {
    output = output.replace(regex, (_, start, path, end) => replacer(start, path, end));
  }

  function processSrcset(srcset: string): string {
    return srcset
      .split(',')
      .map((part) => {
        const [url, descriptor] = part.trim().split(/\s+/, 2);
        if (url.startsWith('/')) {
          const newUrl = baseUrl + url.slice(1);
          return descriptor ? `${newUrl} ${descriptor}` : newUrl;
        }
        return part.trim();
      })
      .join(', ');
  }

  replacePaths(
    /(<img[^>]*\s+src=["'])(\/[^"']+)(["'][^>]*>)/gi,
    (start, path, end) => `${start}${baseUrl}${path.slice(1)}${end}`,
  );

  replacePaths(
    /(<source[^>]*\s+src=["'])(\/[^"']+)(["'][^>]*>)/gi,
    (start, path, end) => `${start}${baseUrl}${path.slice(1)}${end}`,
  );

  replacePaths(
    /(<audio[^>]*\s+src=["'])(\/[^"']+)(["'][^>]*>)/gi,
    (start, path, end) => `${start}${baseUrl}${path.slice(1)}${end}`,
  );

  replacePaths(
    /(<video[^>]*\s+poster=["'])(\/[^"']+)(["'][^>]*>)/gi,
    (start, path, end) => `${start}${baseUrl}${path.slice(1)}${end}`,
  );

  replacePaths(
    /(<img[^>]*\s+srcset=["'])([^"']+)(["'][^>]*>)/gi,
    (start, srcsetContent, end) => `${start}${processSrcset(srcsetContent)}${end}`,
  );

  replacePaths(
    /(<source[^>]*\s+srcset=["'])([^"']+)(["'][^>]*>)/gi,
    (start, srcsetContent, end) => `${start}${processSrcset(srcsetContent)}${end}`,
  );

  replacePaths(
    /(background-image:\s*url\(["']?)(\/[^"')]+)(["']?\))/gi,
    (start, path, end) => `${start}${baseUrl}${path.slice(1)}${end}`,
  );

  replacePaths(
    /(url\(["']?)(\/[^"')]+)(["']?\))/gi,
    (start, path, end) => `${start}${baseUrl}${path.slice(1)}${end}`,
  );

  return output;
}