function parseUrl(value: string) {
  try {
    return new URL(String(value || "").trim());
  } catch {
    return null;
  }
}

export function isUrlWithinPublicBase(mediaUrl: string, publicBaseUrl: string) {
  const media = parseUrl(mediaUrl);
  const base = parseUrl(publicBaseUrl);
  if (!media || !base || media.host.toLowerCase() !== base.host.toLowerCase()) {
    return false;
  }

  const basePath = base.pathname.replace(/\/+$/, "");
  if (!basePath) return true;
  return media.pathname === basePath || media.pathname.startsWith(`${basePath}/`);
}

export function shouldStageVip98kReferenceUrl(params: {
  mediaUrl: string;
  sourcePublicUrl: string;
  targetPublicUrl?: string;
}) {
  if (
    params.targetPublicUrl &&
    isUrlWithinPublicBase(params.mediaUrl, params.targetPublicUrl)
  ) {
    return false;
  }
  return isUrlWithinPublicBase(params.mediaUrl, params.sourcePublicUrl);
}

export function getStorageObjectKeyFromPublicUrl(
  mediaUrl: string,
  publicBaseUrl: string,
) {
  if (!isUrlWithinPublicBase(mediaUrl, publicBaseUrl)) return null;
  const media = parseUrl(mediaUrl);
  const base = parseUrl(publicBaseUrl);
  if (!media || !base) return null;
  const basePath = base.pathname.replace(/\/+$/, "");
  const encodedKey = media.pathname.slice(basePath.length).replace(/^\/+/, "");
  if (!encodedKey) return null;
  try {
    return decodeURIComponent(encodedKey);
  } catch {
    return encodedKey;
  }
}