"""
Utility functions for the application.
"""

import logging
import traceback
from datetime import datetime

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    handlers=[
        logging.FileHandler('app.log'),
        logging.StreamHandler()
    ]
)

logger = logging.getLogger(__name__)


def log_error(message, exception=None):
    """Log error message with optional exception details."""
    if exception:
        logger.error(f"{message}: {str(exception)}")
        logger.error(traceback.format_exc())
    else:
        logger.error(message)


def log_info(message):
    """Log info message."""
    logger.info(message)


def get_timestamp():
    """Get current timestamp as string."""
    return datetime.now().strftime("%Y-%m-%d %H:%M:%S")


def sanitize_filename(filename):
    """Sanitize filename for safe file operations."""
    # Remove or replace unsafe characters
    unsafe_chars = ['<', '>', ':', '"', '/', '\\', '|', '?', '*']
    for char in unsafe_chars:
        filename = filename.replace(char, '_')
    return filename.strip()