firebaseConfig.js

// firebaseConfig.js
// Complete Firebase Configuration for Zero Trap

import { initializeApp, getApp, getApps } from 'firebase/app';
import { getAuth, initializeAuth, getReactNativePersistence } from 'firebase/auth';
import { getFirestore } from 'firebase/firestore';
import { getStorage } from 'firebase/storage';
import AsyncStorage from '@react-native-async-storage/async-storage';

// Supply Firebase values through EXPO_PUBLIC_* environment variables.
const firebaseConfig = {
  apiKey: process.env.EXPO_PUBLIC_FIREBASE_API_KEY || '',
  authDomain: process.env.EXPO_PUBLIC_FIREBASE_AUTH_DOMAIN || '',
  projectId: process.env.EXPO_PUBLIC_FIREBASE_PROJECT_ID || '',
  storageBucket: process.env.EXPO_PUBLIC_FIREBASE_STORAGE_BUCKET || '',
  messagingSenderId: process.env.EXPO_PUBLIC_FIREBASE_MESSAGING_SENDER_ID || '',
  appId: process.env.EXPO_PUBLIC_FIREBASE_APP_ID || ''
};

// Single Firebase app instance (avoids "already exists" on Fast Refresh)
const app = getApps().length === 0 ? initializeApp(firebaseConfig) : getApp();

// Initialize Auth with AsyncStorage persistence (getAuth fallback avoids crash on Fast Refresh)
let auth;
try {
  auth = initializeAuth(app, {
    persistence: getReactNativePersistence(AsyncStorage)
  });
} catch (e) {
  auth = getAuth(app);
}

// Initialize Firestore
const db = getFirestore(app);

// Initialize Storage (for future use when upgraded to Blaze)
const storage = getStorage(app);

export { app, auth, db, storage };