import type { SuperagentUser } from '../types';

/**
 * The signed-in user's avatar URL, derived from the host-injected `/me` object.
 * Prefers the explicit `profile_image_url`, then the common Google OAuth image
 * fields (`picture` / `photo` / `avatar_url`), and finally `null`. Whitespace-only
 * values are treated as absent. Kept as a pure helper so the runtime never has to
 * take a pre-computed avatar prop — it derives it from `user` directly.
 */
export function getUserProfileImageUrl(user?: SuperagentUser | null): string | null {
  const profileImageUrl = user?.profile_image_url;
  if (typeof profileImageUrl === 'string' && profileImageUrl.trim()) {
    return profileImageUrl.trim();
  }

  return extractGoogleProfileImage(user);
}

function extractGoogleProfileImage(user?: SuperagentUser | null): string | null {
  const candidates = [user?.picture, user?.photo, user?.avatar_url];
  const image = candidates.find((value) => typeof value === 'string' && value.trim());
  return typeof image === 'string' ? image.trim() : null;
}