// firebase/session.ts
import { getAuth, onAuthStateChanged, User } from "firebase/auth";
import AsyncStorage from "@react-native-async-storage/async-storage";
import { app } from "./config";

const auth = getAuth(app);

export const monitorAuthState = (onUserChange: (user: User | null) => void) => {
  onAuthStateChanged(auth, async (user) => {
    if (user) {
      await AsyncStorage.setItem("user", JSON.stringify(user));
      onUserChange(user);
    } else {
      await AsyncStorage.removeItem("user");
      onUserChange(null);
    }
  });
};

export const getStoredUser = async (): Promise<User | null> => {
  const json = await AsyncStorage.getItem("user");
  return json ? JSON.parse(json) : null;
};