import inspect
from typing import Any, Tuple


def get_arg(
    args: tuple, kwargs: dict, args_spec: inspect.FullArgSpec, arg_name: str, from_default: bool = False
) -> Any:
    """Get arg value by name from args or kwargs.

    Args:
        args: Function args.
        kwargs: Function kwargs.
        args_spec: Function args spec.
        arg_name: Function arg name.
        from_default: Allow get value from args defaults.

    Returns:
        Arg value.

    """
    if arg_name in kwargs:
        return kwargs[arg_name]

    if arg_name not in args_spec.args:
        return None

    index = args_spec.args.index(arg_name)
    if len(args) > index:
        return args[index]

    if not from_default:
        return None

    return args_spec.defaults[index - len(args_spec.args)]


def set_arg(
    args: tuple, kwargs: dict, args_spec: inspect.FullArgSpec, arg_name: str, value: Any, filter_kwargs: bool = False
) -> Tuple[tuple, dict]:
    """Set arg value by name to args or kwargs.

    Args:
        args: Function args.
        kwargs: Function kwargs.
        args_spec: Function args spec.
        arg_name: Function arg name.
        value: New arg value.
        filter_kwargs: Filter kwargs that does not exists in args spec.

    Returns:
        Modified args and kwargs.

    """
    if filter_kwargs:
        modified_kwargs = {k: v for k, v in kwargs.items() if k in args_spec.args}
    else:
        modified_kwargs = dict(kwargs)

    index = args_spec.args.index(arg_name) if arg_name in args_spec.args else -1
    if arg_name in kwargs or index < 0 or len(args) <= index:
        modified_kwargs[arg_name] = value
        return args, modified_kwargs

    modified_args = list(args)
    modified_args[index] = value
    return tuple(modified_args), modified_kwargs