export function ref<T>(
value: T,
): [T] extends [Ref] ? IfAny<T, Ref<T>, T> : Ref<UnwrapRef<T>, UnwrapRef<T> | T>
export function ref<T = any>(): Ref<T | undefined>
export function ref(value?: unknown) {
return createRef(value, false)
}

function createRef(rawValue: unknown, shallow: boolean) {
if (isRef(rawValue)) {
return rawValue
}
return new RefImpl(rawValue, shallow)
}

class RefImpl<T = any> {

constructor(value: T, isShallow: boolean) {
this._rawValue = isShallow ? value : toRaw(value)
this._value = isShallow ? value : toReactive(value)
this[ReactiveFlags.IS_SHALLOW] = isShallow
}

}

export const toReactive = <T extends unknown>(value: T): T =>
isObject(value) ? reactive(value) : value