"""
Logging utility for AI-Based Data Cleaner
"""
import logging
import sys
import os
from datetime import datetime
from config import Config

def setup_logger(name: str = "data_cleaner") -> logging.Logger:
    """
    Set up and configure logger
    
    Args:
        name: Logger name
        
    Returns:
        Configured logger instance
    """
    logger = logging.getLogger(name)
    
    # Avoid duplicate handlers
    if logger.handlers:
        return logger
    
    logger.setLevel(getattr(logging, Config.LOG_LEVEL))
    
    # Create formatter
    formatter = logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
    )
    
    # Console handler
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setFormatter(formatter)
    logger.addHandler(console_handler)
    
    # File handler - create logs directory if it doesn't exist
    logs_dir = 'logs'
    os.makedirs(logs_dir, exist_ok=True)

    file_handler = logging.FileHandler(
        f'{logs_dir}/data_cleaner_{datetime.now().strftime("%Y%m%d")}.log'
    )
    file_handler.setFormatter(formatter)
    logger.addHandler(file_handler)
    
    return logger