import type { AuthUser } from "@/types/auth";

/** Prefer Meshkee English name fields; fall back to cell. */
export function getDisplayName(user: AuthUser | null | undefined): string {
  if (!user) return "Admin";

  const english = [user.firstNameEn, user.lastNameEn]
    .filter(Boolean)
    .join(" ")
    .trim();
  if (english) return english;

  const local = [user.firstName, user.lastName].filter(Boolean).join(" ").trim();
  if (local && !/[\u0600-\u06FF]/.test(local)) return local;

  return user.cellNumber || "User";
}

export function getFirstName(user: AuthUser | null | undefined): string {
  if (!user) return "there";
  const raw =
    user.firstNameEn?.trim() ||
    (user.firstName?.trim() && !/[\u0600-\u06FF]/.test(user.firstName)
      ? user.firstName.trim()
      : "");
  if (!raw) return "there";
  return raw.split(/\s+/)[0] || raw;
}