"""Notification operations for SNS"""
import os
import json
from datetime import datetime
import boto3

sns = boto3.client('sns')
TOPIC = os.environ['SNS_TOPIC_ARN']
ENV = os.environ.get('ENVIRONMENT', 'prod')


def send_notification(filename: str, result: dict, status: str) -> None:
    """Send SNS notification"""
    sns.publish(
        TopicArn=TOPIC,
        Subject=f'Image Processing {status.title()}',
        Message=json.dumps({
            'filename': filename,
            'status': status,
            'details': result,
            'timestamp': datetime.utcnow().isoformat(),
            'environment': ENV
        }, indent=2)
    )