"""
Logging utility for Python service
"""
import logging
import sys
from datetime import datetime
from typing import Optional


def setup_logger(
    name: str = "options_flow_service",
    level: int = logging.INFO,
    log_file: Optional[str] = None
) -> logging.Logger:
    """Setup logger with console and optional file output"""
    logger = logging.getLogger(name)
    logger.setLevel(level)
    
    # Remove existing handlers
    logger.handlers = []
    
    # Console handler
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setLevel(level)
    console_format = logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )
    console_handler.setFormatter(console_format)
    logger.addHandler(console_handler)
    
    # File handler (optional)
    if log_file:
        file_handler = logging.FileHandler(log_file)
        file_handler.setLevel(level)
        file_format = logging.Formatter(
            '%(asctime)s - %(name)s - %(levelname)s - %(funcName)s:%(lineno)d - %(message)s'
        )
        file_handler.setFormatter(file_format)
        logger.addHandler(file_handler)
    
    return logger


# Default logger instance
logger = setup_logger()