"""
Structured logging utilities for the datalake package.
"""

import logging
from typing import Optional


def setup_logger(name: str, level: str = "INFO") -> logging.Logger:
    """
    Initialize logger with structured output.
    
    Args:
        name: Logger module name
        level: Logging level (INFO, DEBUG, WARNING, ERROR)
    
    Returns:
        Configured logger instance
    """
    logger = logging.getLogger(name)
    
    # Avoid adding duplicate handlers
    if logger.handlers:
        return logger
    
    handler = logging.StreamHandler()
    formatter = logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
    )
    handler.setFormatter(formatter)
    logger.addHandler(handler)
    logger.setLevel(getattr(logging, level.upper(), logging.INFO))
    return logger