"""
Copyright 2024-2026 ChatterMate

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""

from firebase_admin import credentials, initialize_app, get_app
from app.core.config import settings
from app.core.logger import get_logger
import os

logger = get_logger(__name__)


def initialize_firebase():
    """Initialize Firebase Admin SDK"""
    try:
        # Check if already initialized
        try:
            get_app()
            logger.info("Firebase already initialized")
            return
        except ValueError:
            logger.info("Initializing Firebase...")

        # Get credentials file path
        cred_path = settings.FIREBASE_CREDENTIALS

        if not cred_path or not os.path.isfile(cred_path):
            logger.warning(f"Firebase credentials not found at {cred_path}. Running in development mode.")
            # Use a default configuration for development
            cred = credentials.Certificate({
                "type": "service_account",
                "project_id": "demo-project",
                "private_key_id": "demo123456789",
                "private_key": "-----BEGIN PRIVATE KEY-----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\nAgMBAAECggEABBj/H/JGXuVGoCjR6J0XF+kQTOuTgZBvgapkpPTYwfXQ\n-----END PRIVATE KEY-----\n",
                "client_email": "firebase-adminsdk-demo@demo-project.iam.gserviceaccount.com",
                "client_id": "123456789",
                "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": "https://www.googleapis.com/robot/v1/metadata/x509/firebase-adminsdk-demo%40demo-project.iam.gserviceaccount.com",
                "universe_domain": "googleapis.com"
            })
        else:
            logger.info("Loading Firebase credentials from file " + cred_path)
            cred = credentials.Certificate(cred_path)
        
        initialize_app(cred)
        logger.info("Firebase initialized successfully")
    except Exception as e:
        logger.error(f"Error initializing Firebase: {str(e)}")
        logger.warning("Continuing without Firebase initialization")