export const DEEP_LINK_SCHEME = 'cardy';

export function buildLoginDeepLink(server: string, key: string): string {
  return `${DEEP_LINK_SCHEME}://login?server=${encodeURIComponent(server)}&key=${encodeURIComponent(key)}`;
}

export function parseLoginDeepLink(link: string): { server: string; key: string } | null {
  let url: URL;
  try {
    url = new URL(link.trim());
  } catch {
    return null;
  }
  // Non-special schemes put "login" into host for "cardy://login?…".
  if (url.protocol !== `${DEEP_LINK_SCHEME}:` || url.host !== 'login') return null;
  const server = url.searchParams.get('server');
  const key = url.searchParams.get('key');
  if (!server || !key) return null;
  return { server, key };
}