import AsyncStorage from '@react-native-async-storage/async-storage';
import { getApps, initializeApp } from 'firebase/app';
import { getAuth, type Auth } from 'firebase/auth';
import { getFirestore } from 'firebase/firestore';
import { Platform } from 'react-native';
import type { FirebaseApp } from 'firebase/app';

type ReactNativeAuthModule = {
  getAuth(app?: FirebaseApp): Auth;
  initializeAuth(
    app: FirebaseApp,
    deps?: { persistence?: unknown }
  ): Auth;
  getReactNativePersistence(storage: typeof AsyncStorage): unknown;
};

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,
};

const isAppInitialized = getApps().length > 0;
const app = isAppInitialized ? getApps()[0] : initializeApp(firebaseConfig);
const reactNativeAuth =
  Platform.OS === 'web'
    ? null
    : (require('@firebase/auth') as ReactNativeAuthModule);

const auth =
  Platform.OS === 'web'
    ? getAuth(app)
    : isAppInitialized
      ? (reactNativeAuth as ReactNativeAuthModule).getAuth(app)
      : (reactNativeAuth as ReactNativeAuthModule).initializeAuth(app, {
          persistence: (reactNativeAuth as ReactNativeAuthModule).getReactNativePersistence(AsyncStorage),
        });

export { auth };
export const db = getFirestore(app);