firebase_auth.py

import streamlit as st
import firebase_admin
from firebase_admin import credentials, auth
import json

# ---------- Firebase Initialization ----------
def initialize_firebase():
    if not firebase_admin._apps:
        try:
            # Convert Streamlit secret to a plain Python dict
            firebase_creds_dict = json.loads(json.dumps(st.secrets["GCP"]))
            cred = credentials.Certificate(firebase_creds_dict)
            firebase_admin.initialize_app(cred)
            st.success("✅ Firebase initialized successfully!")
        except KeyError:
            st.error("Firebase initialization failed: 'GCP' key not found in Streamlit secrets. Add your service account JSON under [GCP].")
        except Exception as e:
            st.error(f"Firebase initialization failed: {e}")

# Initialize on import
initialize_firebase()

# ---------- Create User ----------
def create_user(email: str, password: str):
    try:
        user = auth.create_user(email=email, password=password)
        st.success(f"🎉 User created successfully! UID: {user.uid}")
        return user.uid
    except Exception as e:
        st.error(f"Error creating user: {e}")
        return None

# ---------- Sign In User ----------
# Note: Firebase Admin SDK cannot verify passwords directly
def sign_in_user(email: str, password: str):
    try:
        # Placeholder logic: simulate sign-in
        st.info(f"Sign-in simulated successfully for {email} (Firebase Admin SDK limitation).")
        return f"mock_uid_for_{email}"
    except Exception as e:
        st.error(f"Error signing in: {e}")
        return None