import NProgress from "nprogress";
import { useAuthStore } from "@/stores/auth";
import { useAccountStore } from "@/stores/account";
import { jwtDecode, type JwtPayload } from "jwt-decode";
import { refreshToken } from "../serverCom";

type Payload = JwtPayload & { userId: number; username: string; firstname: string; lastname: string; mail: string };

export async function isAuthenticated(to: any, from: any, next: any) {
  const auth = useAuthStore();
  NProgress.start();
  if (auth.authCheck && localStorage.getItem("access_token")) {
    NProgress.done();
    next();
    return;
  }
  await isAuthenticatedPromise()
    .then(async (result: any) => {
      NProgress.done();
      next();
    })
    .catch((err: Error) => {
      NProgress.done();
      next({ name: "login" });
    });
}

export async function isAuthenticatedPromise(): Promise<Payload> {
  return new Promise<Payload>(async (resolve, reject) => {
    const auth = useAuthStore();
    const account = useAccountStore();
    let decoded = jwtDecode<Payload>(localStorage.getItem("accessToken") ?? "");

    auth.setSuccess();
    if (typeof decoded == "string" || !decoded) {
      reject("failed");
    }

    // check jwt expiry
    const exp = decoded.exp ?? 0;
    const localTimezoneOffset = new Date().getTimezoneOffset();
    const correctedLocalTime = new Date().getTime() + localTimezoneOffset * 60000;
    if (exp < Math.floor(correctedLocalTime / 1000)) {
      await refreshToken()
        .then(() => {
          console.log("fetched new token");
        })
        .catch(() => {
          reject("expired");
        });
    }

    var { firstname, lastname, mail, username } = decoded;
    account.setAccountData(firstname, lastname, mail, username);
    resolve(decoded);
  });
}