"""
Logging configuration for NeuroSAM 3 application.
Provides centralized logging setup with proper formatting and levels.
"""

import logging
import sys
from typing import Optional
from config import LOG_LEVEL, LOG_FORMAT, LOG_FILE

def setup_logger(name: str = "NeuroSAM3", level: Optional[str] = None) -> logging.Logger:
    """
    Set up and configure the application logger.
    
    Args:
        name: Logger name (default: "NeuroSAM3")
        level: Log level (default: from config)
    
    Returns:
        Configured logger instance
    """
    logger = logging.getLogger(name)
    
    # Avoid adding handlers multiple times
    if logger.handlers:
        return logger
    
    # Set log level
    log_level = level or LOG_LEVEL
    logger.setLevel(getattr(logging, log_level.upper(), logging.INFO))
    
    # Create formatter
    formatter = logging.Formatter(LOG_FORMAT)
    
    # Console handler
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setLevel(logging.DEBUG)
    console_handler.setFormatter(formatter)
    logger.addHandler(console_handler)
    
    # File handler (if configured)
    if LOG_FILE:
        try:
            file_handler = logging.FileHandler(LOG_FILE)
            file_handler.setLevel(logging.DEBUG)
            file_handler.setFormatter(formatter)
            logger.addHandler(file_handler)
        except Exception as e:
            logger.warning(f"Could not set up file logging: {e}")
    
    return logger

# Create default logger instance
logger = setup_logger()