"""
Logging utilities for the YOLO + SAM2 video processing pipeline.
"""

import logging
import sys
from typing import Optional

def setup_logging(level: str = "INFO", log_file: Optional[str] = None):
    """
    Setup logging configuration.
    
    Args:
        level: Logging level (DEBUG, INFO, WARNING, ERROR)
        log_file: Optional log file path
    """
    # Convert string level to logging constant
    numeric_level = getattr(logging, level.upper(), None)
    if not isinstance(numeric_level, int):
        raise ValueError(f'Invalid log level: {level}')
    
    # Create formatter
    formatter = logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
    )
    
    # Setup console handler
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setLevel(numeric_level)
    console_handler.setFormatter(formatter)
    
    # Setup root logger
    root_logger = logging.getLogger()
    root_logger.setLevel(numeric_level)
    root_logger.addHandler(console_handler)
    
    # Setup file handler if specified
    if log_file:
        file_handler = logging.FileHandler(log_file)
        file_handler.setLevel(numeric_level)
        file_handler.setFormatter(formatter)
        root_logger.addHandler(file_handler)
    
    # Reduce noise from some libraries
    logging.getLogger('ultralytics').setLevel(logging.WARNING)
    logging.getLogger('matplotlib').setLevel(logging.WARNING)
    
    logging.info(f"Logging setup complete - Level: {level}")

def get_logger(name: str) -> logging.Logger:
    """Get a logger instance with the given name."""
    return logging.getLogger(name)