firebase.js

import { initializeApp, getApps } from "firebase/app";
import {
  getAuth,
  connectAuthEmulator,
  signInWithCustomToken,
} from "firebase/auth";
import { getFirestore } from "firebase/firestore";
import { getStorage } from "firebase/storage";

export const firebaseConfig = {
  apiKey: process.env.NEXT_PUBLIC_FIREBASE_API_KEY,
  authDomain: process.env.NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN,
  projectId: process.env.NEXT_PUBLIC_FIREBASE_PROJECT_ID,
  storageBucket: process.env.NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET,
  messagingSenderId: process.env.NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID,
  appId: process.env.NEXT_PUBLIC_FIREBASE_APP_ID,
};

export const firebaseApp =
  getApps().length === 0 ? initializeApp(firebaseConfig) : getApps()[0];
export const auth = getAuth(firebaseApp);
export const db = getFirestore(firebaseApp);
export const storage = getStorage(firebaseApp);