import logging
import os

def setup_logger(name):
    """
    Sets up a logger with a standard configuration that logs to both the console 
    and a file named 'app.log'.
    """
    logger = logging.getLogger(name)
    
    # If logger already has handlers, don't add more (to avoid duplicate logs)
    if not logger.handlers:
        logger.setLevel(logging.INFO)
        
        # Create formatters
        formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
        
        # Console Handler
        console_handler = logging.StreamHandler()
        console_handler.setFormatter(formatter)
        logger.addHandler(console_handler)
        
        # File Handler
        os.makedirs("logs", exist_ok=True)
        file_handler = logging.FileHandler("logs/app.log", encoding='utf-8')
        file_handler.setFormatter(formatter)
        logger.addHandler(file_handler)
        
    return logger