backend/config/logging_config.py

# Logging Configuration
import logging
import logging.handlers
import sys
from pathlib import Path
from typing import Optional

def setup_logging(
    log_level: str = "INFO",
    log_file: Optional[str] = None,
    enable_console: bool = True,
    max_file_size: int = 10 * 1024 * 1024,  # 10MB
    backup_count: int = 5
) -> logging.Logger:
    """
    Setup centralized logging configuration
    
    Args:
        log_level: Logging level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
        log_file: Path to log file (optional)
        enable_console: Whether to enable console logging
        max_file_size: Maximum log file size in bytes
        backup_count: Number of backup files to keep
    
    Returns:
        Configured logger instance
    """
    
    # Create logs directory if it doesn't exist
    if log_file:
        log_path = Path(log_file)
        log_path.parent.mkdir(parents=True, exist_ok=True)
    
    # Configure root logger
    logger = logging.getLogger("recipe_bot")
    logger.setLevel(getattr(logging, log_level.upper()))
    
    # Clear existing handlers
    logger.handlers.clear()
    
    # Create formatter
    formatter = logging.Formatter(
        fmt="%(asctime)s - %(name)s - %(levelname)s - [%(filename)s:%(lineno)d] - %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S"
    )
    
    # Console handler
    if enable_console:
        console_handler = logging.StreamHandler(sys.stdout)
        console_handler.setLevel(getattr(logging, log_level.upper()))
        console_handler.setFormatter(formatter)
        logger.addHandler(console_handler)
    
    # File handler with rotation
    if log_file:
        file_handler = logging.handlers.RotatingFileHandler(
            filename=log_file,
            maxBytes=max_file_size,
            backupCount=backup_count,
            encoding='utf-8'
        )
        file_handler.setLevel(getattr(logging, log_level.upper()))
        file_handler.setFormatter(formatter)
        logger.addHandler(file_handler)
    
    # Prevent duplicate logs
    logger.propagate = False
    
    return logger

def get_logger(name: str) -> logging.Logger:
    """Get a child logger with the specified name"""
    return logging.getLogger(f"recipe_bot.{name}")

# Default logger setup
def setup_default_logging():
    """Setup default logging configuration"""
    return setup_logging(
        log_level="INFO",
        log_file="./logs/recipe_bot.log",
        enable_console=True
    )