firebase.js

import { initializeApp, getApps, getApp } from "firebase/app";
import { getAuth, GoogleAuthProvider, GithubAuthProvider } from "firebase/auth";
import { getFirestore } from "firebase/firestore";

// Firebase configuration
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,
};

// Initialize Firebase app
const app = !getApps().length ? initializeApp(firebaseConfig) : getApp();
const firestore = getFirestore(app);
const auth = getAuth(app);
const googleProvider = new GoogleAuthProvider();
const githubProvider = new GithubAuthProvider();

export { firestore, auth, googleProvider, githubProvider };