import logging
from pathlib import Path

from logwatcher.config import DATETIME_FORMAT


def _setup_formatter(
    format: str = "[%(asctime)s] - %(levelname)s: %(message)s",
    datefmt: str = DATETIME_FORMAT,
) -> logging.Formatter:
    return logging.Formatter(fmt=format, datefmt=datefmt)


def _setup_handler(
    formatter: logging.Formatter, level: int, filename: Path | None = None
) -> logging.Handler:
    handler: logging.Handler
    if filename:
        handler = logging.FileHandler(filename=filename, encoding="utf-8")
    else:
        handler = logging.StreamHandler()
    handler.setLevel(level)
    handler.setFormatter(formatter)
    return handler


def setup_logging(
    formatter: logging.Formatter | None = None,
    file_path: Path = Path("output/logs/logwatcher.log"),
    verbose: bool = False,
) -> logging.Logger:
    """Create a new instance of Logger named 'logger' customized for the logwatcher package.
    
    The format display in order the time, the level of log and the log message
    The logs are only redirect in the standard output.
    """
    _formatter = formatter if formatter else _setup_formatter()

    if verbose:
        standard_output = _setup_handler(_formatter, logging.DEBUG)
    else:
        standard_output = _setup_handler(_formatter, logging.WARNING)
    file_output = _setup_handler(_formatter, logging.DEBUG, file_path)

    root = logging.getLogger()
    root.setLevel(logging.DEBUG)

    root.addHandler(standard_output)
    root.addHandler(file_output)

    logger = logging.getLogger("logwatcher")
    logger.setLevel(logging.NOTSET)

    # silent the other logs
    logging.getLogger("exchangelib").setLevel(logging.WARNING)

    return logger