import logging
import sys
from typing import Optional

def setup_logging(level: str = "INFO", logger_name: Optional[str] = None) -> logging.Logger:
    """
    Set up centralized logging configuration
    
    Args:
        level: Logging level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
        logger_name: Name for the logger, if None uses root logger
    
    Returns:
        Configured logger instance
    """
    
    # Create logger
    logger = logging.getLogger(logger_name) if logger_name else logging.getLogger()
    
    # Avoid duplicate handlers
    if logger.handlers:
        return logger
    
    # Set level
    logger.setLevel(getattr(logging, level.upper(), logging.INFO))
    
    # Create console handler
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setLevel(getattr(logging, level.upper(), logging.INFO))
    
    # Create formatter
    formatter = logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )
    console_handler.setFormatter(formatter)
    
    # Add handler to logger
    logger.addHandler(console_handler)
    
    return logger

# Configure the root logger for the application
def configure_app_logging():
    """Configure application-wide logging"""
    logging.basicConfig(
        level=logging.INFO,
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )
    
    # Create application logger
    app_logger = logging.getLogger(__name__)
    app_logger.info("Application logging configured")
    
    return app_logger