export interface SessionUserLike {
  id: string;
  email: string;
  emailVerified: boolean;
  name?: string | null;
  image?: string | null;
}

export function isConfiguredAdminEmail(
  email: string | null | undefined,
  adminEmailConfig: string | null | undefined,
): boolean {
  if (!email || !adminEmailConfig) return false;

  return adminEmailConfig
    .split(",")
    .map((configuredEmail) => configuredEmail.trim())
    .filter(Boolean)
    .includes(email);
}

export function isAllowedAdminRegistration(
  email: string | null | undefined,
  authMethod: string,
  adminEmail: string | null | undefined,
): boolean {
  return (
    authMethod === "email-password" &&
    isConfiguredAdminEmail(email, adminEmail)
  );
}

export function isAuthorizedAdmin(
  user: SessionUserLike | null | undefined,
  adminEmail: string | null | undefined,
): user is SessionUserLike {
  return Boolean(
    user &&
      user.emailVerified === true &&
      isConfiguredAdminEmail(user.email, adminEmail),
  );
}