#!/usr/bin/env python3
"""
PreSave Hook - Pre-save message processing example

Executed before messages are saved to the database; can be used for content
filtering, sensitive information masking, etc.
"""
import os
import sys


def main():
    """Read parameters from environment variables and process them."""
    content = os.environ.get('CONTENT', '')
    role = os.environ.get('ROLE', '')

    # Example: add sensitive information masking logic here
    # e.g.: remove phone numbers, emails, and other sensitive information

    # Output the processed content (output original content if no modification needed)
    print(content)

    # Only logging here; content is not modified
    if content:
        # Example: masking (commented out; enable as needed in production)
        # import re
        # processed = content
        # # Simple phone number masking
        # processed = re.sub(r'1[3-9]\d{9}', '[PHONE]', processed)
        # # Email masking
        # processed = re.sub(r'\b[\w.-]+@[\w.-]+\.\w+\b', '[EMAIL]', processed)
        # print(processed)
        pass

    return 0


if __name__ == '__main__':
    sys.exit(main())