import os
from dotenv import load_dotenv

load_dotenv()


def get_config(value, env, default, cast=None):
    """
    Small utility to get a configuration value, returns `value` if it is not None, else it will try to get the
    environment variable cast with `cast`. If the environment variable is not set, it will return `default`.

    :param value: The value to check.
    :type value: Any
    :param env: The environment variable to check.
    :type env: string
    :param default: The default value to return if the environment variable is not set.
    :type default: Any
    :param cast: A function to use to cast the environment variable. Must support string input.
    :type cast: Callable[[Any], Any], optional

    :return: The value, the environment variable value, or the default.
    :rtype: Any
    """
    if value is not None:
        return value

    env = os.environ.get(env, default)

    if cast is None:
        return env

    return cast(env)