export function getPrimaryUserRole(
  userRoles: string | null | undefined,
  fallback = "User",
): string {
  return userRoles?.split(",")[0]?.trim() || fallback;
}

export function isAdminUser(userRoles: string | null | undefined): boolean {
  if (!userRoles) {
    return false;
  }
  return userRoles
    .split(",")
    .map((role) => role.trim().toLowerCase())
    .includes("admin");
}

/**
 * SH-336's `viewAllDispatchersOnDashboard` permission. The codebase has no
 * permission model, so it is derived from role: Admin and Scheduler may pick any
 * dispatcher (or the whole company) on the Dashboard; a Dispatcher may not and
 * is locked to their own work orders. Unknown roles default to the restrictive
 * (Dispatcher) behaviour so no one accidentally gains a company-wide view.
 */
export function canViewAllDispatchersOnDashboard(userRoles: string | null | undefined): boolean {
  if (!userRoles) {
    return false;
  }
  const roles = userRoles.split(",").map((role) => role.trim().toLowerCase());
  return roles.includes("admin") || roles.includes("scheduler");
}