database_initializer.py

import os
import firebase_admin
from firebase_admin import credentials, firestore
from dotenv import load_dotenv; load_dotenv()

# Initialize Firebase Admin SDK

# Initialize Firebase app with credentials and options
cred = credentials.Certificate({
    "type": "service_account",
    "project_id": os.environ.get("FIREBASE_PROJECT_ID"),
    "private_key_id": os.environ.get("FIREBASE_PRIVATE_KEY_ID"),
    "private_key": os.environ.get("FIREBASE_PRIVATE_KEY").replace("\\n", "\n"),
    "client_email": os.environ.get("FIREBASE_CLIENT_EMAIL"),
    "client_id": os.environ.get("FIREBASE_CLIENT_ID"),
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://oauth2.googleapis.com/token",
    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    "client_x509_cert_url": os.environ.get("FIREBASE_CLIENT_X509_CERT_URL")
})
try:
    firebase_admin.get_app()
except ValueError:
    firebase_admin.initialize_app(cred, {
        'databaseURL': os.environ.get("DATABASE_URL")
    })