local UserInputService = game:GetService("UserInputService")
local Camera = workspace.CurrentCamera

local defaultFOV = 70
local zoomedInFOV = 25
local extraZoomedFOV = 5
local zoomSpeed = 0.2
local sensitivitySpeed = 0.1

local defaultSensitivity = UserInputService.MouseDeltaSensitivity
local zoomedSensitivity = 0.5
local extraZoomedSensitivity = 0.2

local zoomLevel = 0

local function smoothZoom(targetFOV)
	local currentFOV = Camera.FieldOfView
	while math.abs(currentFOV - targetFOV) > 0.1 do
		currentFOV = currentFOV + (targetFOV - currentFOV) * zoomSpeed
		Camera.FieldOfView = currentFOV
		task.wait()
	end
	Camera.FieldOfView = targetFOV
end

local function smoothSensitivity(targetSensitivity)
	local currentSensitivity = UserInputService.MouseDeltaSensitivity
	while math.abs(currentSensitivity - targetSensitivity) > 0.01 do
		currentSensitivity = currentSensitivity + (targetSensitivity - currentSensitivity) * sensitivitySpeed
		UserInputService.MouseDeltaSensitivity = currentSensitivity
		task.wait()
	end
	UserInputService.MouseDeltaSensitivity = targetSensitivity
end

UserInputService.InputBegan:Connect(function(input, gameProcessed)
	if not gameProcessed and input.KeyCode == Enum.KeyCode.E then
		zoomLevel = (zoomLevel + 1) % 3

		local targetFOV, targetSensitivity

		if zoomLevel == 0 then
			targetFOV = defaultFOV
			targetSensitivity = defaultSensitivity
		elseif zoomLevel == 1 then
			targetFOV = zoomedInFOV
			targetSensitivity = zoomedSensitivity
		elseif zoomLevel == 2 then
			targetFOV = extraZoomedFOV
			targetSensitivity = extraZoomedSensitivity
		end

		task.spawn(smoothZoom, targetFOV)
		task.spawn(smoothSensitivity, targetSensitivity)
	end
end)