"""
Basic Utilities
Includes common helper functions for this project
- Handling optionals
- getting members by string name
- typenames
"""

from typing import Any, Callable, TypeVar, TypeAlias, Type, Iterable
from types import GenericAlias

AnyType: TypeAlias = Type | GenericAlias

T = TypeVar("T")


def some_or(data: T | None, alt: T):
    return data if data is not None else alt


N = TypeVar("N")
M = TypeVar("M")


def some_or_apply(data: N, fn: Callable[[N], M], alt: M):
    return fn(data) if data is not None else alt


def get(obj: Any, attr: str) -> Any:
    return obj.__getattribute__(attr)


def opt_get(obj: Any, attr: str) -> Any | None:
    try:
        return obj.__getattribute__(attr)
    except AttributeError:
        return None


X = TypeVar("X")
Y = TypeVar("Y")


def firstkey(d: dict[X, Y], val: Y) -> X | None:
    for k, v in d.items():
        if v == val:
            return k
    else:
        return None


def typename(t: AnyType) -> str:
    if t is None:
        return "None"
    else:
        return t.__name__


Z = TypeVar("Z")


def ordered_iter(types: Iterable[Z]) -> list[Z]:
    return sorted(list(types), key=str)