import typing as t

import werkzeug


def prettify_name(name: str) -> str:
    """
    Prettify pythonic variable name.

    For example, 'hello_world' will be converted to 'Hello World'

    :param name:
        Name to prettify
    """
    return name.replace("_", " ").title()


def get_mdict_item_or_list(
    mdict: werkzeug.datastructures.MultiDict, key: str
) -> t.Any | None:
    """
    Return the value for the given key of the multidict.

    A werkzeug.datastructures.multidict can have a single
    value or a list of items. If there is only one item,
    return only this item, else the whole list as a tuple

    :param mdict: Multidict to search for the key
    :type mdict: werkzeug.datastructures.multidict
    :param key: key to look for
    :return: the value for the key or None if the Key has not be found
    """
    if hasattr(mdict, "getlist"):
        v = mdict.getlist(key)
        if len(v) == 1:
            value = v[0]

            # Special case for empty strings, treat them as "no-value"
            if value == "":
                value = None

            return value
        elif len(v) == 0:
            return None
        else:
            return tuple(v)
    return None
