import type { JwtPayload } from "jwt-decode";
import type { Ref, UnwrapRef } from "vue";
import jwtDecode from "jwt-decode";
import { isErrorResponse } from "./base";
import { refresh_token } from "./auth";

export async function check_token(
  token: TokenInjectType
): Promise<string | void> {
  if (!token.jwt.value) return token.logout();
  const payload = jwtDecode<JwtPayload>(token.jwt.value);
  if (!payload) return token.logout();
  // Expires in more than 60 Minute
  if (payload.exp && payload.exp > Math.floor(Date.now() / 1000 + 60 * 60))
    return token.jwt.value;
  const new_token = await refresh_token(token.jwt.value);
  if (isErrorResponse(new_token)) return token.logout();
  token.setToken(new_token.jwt);
  return new_token.jwt;
}

export type TokenInjectType = {
  jwt: Ref<UnwrapRef<string | null>>;
  setToken: (token: string) => void;
  logout: () => void;
};