import type { AxiosError } from "axios";

import { getAuthLoginRedirectUrl, isAtLoginRedirectUrl } from "./utils";

let isRedirectingToLogin = false;

function shouldRedirectToLogin(error: unknown): boolean {
  if (!error || typeof error !== "object") return false;

  const axiosError = error as AxiosError;
  const status = axiosError.response?.status;
  const code = axiosError.code;

  return status === 401 || code === "UNAUTHORIZED";
}

function redirectToLogin(): void {
  if (typeof window === "undefined") return;

  const loginUrl = getAuthLoginRedirectUrl();
  if (isAtLoginRedirectUrl(loginUrl)) return;
  if (isRedirectingToLogin) return;

  isRedirectingToLogin = true;
  window.location.assign(loginUrl);
}

export function errorInterceptor(error: unknown) {
  if (shouldRedirectToLogin(error)) redirectToLogin();
  return Promise.reject(error);
}