import logging
import enum


def _build_logger() -> tuple[logging.Logger, logging.Handler]:
    # Create a new logger which is independent with Flask
    logger = logging.getLogger("my_console_logger")
    # Avoid message was propagated to root logger or captured by Flask logger.
    logger.propagate = False
    # Set initial level.
    logger.setLevel(logging.INFO)

    # Create StreamHandler to output into stderr.
    console_handler = logging.StreamHandler()
    console_handler.setLevel(logging.DEBUG)
    # Set format for it.
    formatter = logging.Formatter("[%(levelname)s] %(message)s")
    console_handler.setFormatter(formatter)
    # Add handler
    logger.addHandler(console_handler)

    return (logger, console_handler)


(LOGGER, CONSOLE_HANDLER) = _build_logger()


class LoggerLevel(enum.IntEnum):
    DEBUG = enum.auto()
    INFO = enum.auto()


def set_level(level: LoggerLevel) -> None:
    logging_level: int = logging.INFO
    match level:
        case LoggerLevel.DEBUG:
            logging_level = logging.DEBUG
        case LoggerLevel.INFO:
            logging_level = logging.INFO

    LOGGER.setLevel(logging_level)
    CONSOLE_HANDLER.setLevel(logging_level)