from signe import createSignal, effect, computed
from signe.types import TSetter, TGetter
from typing import TypeVar, Generic, overload, Union, Callable, cast

T = TypeVar("T")

class Ref(Generic[T]):
    def __init__(self, getter: TGetter[T], setter: TSetter[T]) -> None:
        self.___getter = getter
        self.___setter = setter

    @property
    def value(self):
        return self.___getter()

    @value.setter
    def value(self, value: T):
        self.___setter(value)

class ReadonlyRef(Generic[T]):
    def __init__(self, getter: TGetter[T]) -> None:
        self.___getter = getter

    @property
    def value(self):
        return self.___getter()

def ref(value: T):
    comp = False if isinstance(value, (list, dict)) else None
    getter, setter = createSignal(value, comp)
    return cast(Ref[T], Ref(getter, setter))


def ref_computed(fn: Callable[[], T]):
    getter = computed(fn)
    return ReadonlyRef(getter)