--[=[
	Observes an instance's ancestry

	@param instance Instance
	@param className string
	@return Observable<Instance>
]=]

function RxInstanceUtils.observeFirstAncestorBrio(instance, className)
	assert(typeof(instance) == "Instance", "Bad instance")
	assert(type(className) == "string", "Bad className")

	return Observable.new(function(sub)
		local maid = Maid.new()

		local lastFound = nil
		local function handleAncestryChanged()
			local found = instance:FindFirstAncestorWhichIsA(className)

			if found then
				if found ~= lastFound then
					lastFound = found
					local brio = Brio.new(found)
					maid._current = brio
					sub:Fire(brio)
				end
			elseif lastFound then
				maid._current = nil
				lastFound = nil
			end
		end

		maid:GiveTask(instance.AncestryChanged:Connect(handleAncestryChanged))
		handleAncestryChanged()

		return maid
	end)
end
