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DrewstersCarController
local DrewstersCarController = {}

--------------------------------------------------
-- SERVICES
--------------------------------------------------

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")

--------------------------------------------------
-- PLAYER
--------------------------------------------------

local player = Players.LocalPlayer

--------------------------------------------------
-- SETTINGS
--------------------------------------------------

DrewstersCarController.MaxSpeed = 5000
DrewstersCarController.Acceleration = 250
DrewstersCarController.CurrentSpeed = 0

-- Gears
DrewstersCarController.Gears = {
	P = 0,   -- Park
	R = -1,  -- Reverse
	N = 0,   -- Neutral
	D = 1    -- Drive
}

DrewstersCarController.CurrentGear = "P"

--------------------------------------------------
-- CAR DETECTION
--------------------------------------------------

local function getCar()
	local character = player.Character
	if not character then return nil end

	local humanoid = character:FindFirstChildOfClass("Humanoid")
	if not humanoid then return nil end

	local seat = humanoid.SeatPart
	if seat and seat:IsA("VehicleSeat") then
		return seat:FindFirstAncestorOfClass("Model"), seat
	end

	return nil
end

--------------------------------------------------
-- GEAR SYSTEM
--------------------------------------------------

function DrewstersCarController:SetGear(gear)
	if self.Gears[gear] == nil then return end
	self.CurrentGear = gear
end

function DrewstersCarController:GetGearMultiplier()
	return self.Gears[self.CurrentGear] or 0
end

--------------------------------------------------
-- SPEED SYSTEM
--------------------------------------------------

function DrewstersCarController:SetSpeed(speed)
	self.CurrentSpeed = math.clamp(speed, 0, self.MaxSpeed)
end

function DrewstersCarController:IncreaseSpeed(amount)
	self:SetSpeed(self.CurrentSpeed + amount)
end

function DrewstersCarController:DecreaseSpeed(amount)
	self:SetSpeed(self.CurrentSpeed - amount)
end

--------------------------------------------------
-- MAIN UPDATE LOOP
--------------------------------------------------

function DrewstersCarController:Start()
	RunService.Heartbeat:Connect(function()
		local car, seat = getCar()
		if not car or not seat then return end

		local primary = car.PrimaryPart
		if not primary then return end

		local gearMultiplier = self:GetGearMultiplier()

		-- No movement in Park/Neutral
		if gearMultiplier == 0 then
			return
		end

		local throttle = seat.ThrottleFloat
		if throttle == 0 then return end

		local direction = primary.CFrame.LookVector * gearMultiplier

		local velocity = primary.AssemblyLinearVelocity

		-- Smooth acceleration system
		local targetSpeed = self.CurrentSpeed * throttle

		primary.AssemblyLinearVelocity = Vector3.new(
			direction.X * targetSpeed,
			velocity.Y,
			direction.Z * targetSpeed
		)
	end)
end

--------------------------------------------------
-- STATUS HELPERS
--------------------------------------------------

function DrewstersCarController:GetStatus()
	return {
		speed = self.CurrentSpeed,
		gear = self.CurrentGear
	}
end

return DrewstersCarController