local player = game:GetService("Players").LocalPlayer
local uis = game:GetService("UserInputService")
local runService = game:GetService("RunService")

local flying = false
local speed = 50
local toggleKey = Enum.KeyCode.F

local bodyVelocity
local bodyGyro

local function toggleFly()
	flying = not flying
	
	local character = player.Character
	if not character then return end
	
	local humanoid = character:FindFirstChild("Humanoid")
	local rootPart = character:FindFirstChild("HumanoidRootPart")
	
	if not humanoid or not rootPart then return end
	
	if flying then
		humanoid.PlatformStand = true
		
		bodyVelocity = Instance.new("BodyVelocity")
		bodyVelocity.Velocity = Vector3.new(0,0,0)
		bodyVelocity.MaxForce = Vector3.new(4000, 4000, 4000)
		bodyVelocity.Parent = rootPart
		
		bodyGyro = Instance.new("BodyGyro")
		bodyGyro.MaxTorque = Vector3.new(4000, 4000, 4000)
		bodyGyro.P = 1000
		bodyGyro.D = 50
		bodyGyro.CFrame = rootPart.CFrame
		bodyGyro.Parent = rootPart
		
		runService:BindToRenderStep("Fly", 0, function()
			if not flying or not character or not rootPart then return end
			
			local moveDirection = Vector3.new(0,0,0)
			local camera = workspace.CurrentCamera
			
			if uis:IsKeyDown(Enum.KeyCode.W) then
				moveDirection = moveDirection + camera.CFrame.LookVector
			end
			if uis:IsKeyDown(Enum.KeyCode.S) then
				moveDirection = moveDirection - camera.CFrame.LookVector
			end
			if uis:IsKeyDown(Enum.KeyCode.A) then
				moveDirection = moveDirection - camera.CFrame.RightVector
			end
			if uis:IsKeyDown(Enum.KeyCode.D) then
				moveDirection = moveDirection + camera.CFrame.RightVector
			end
			if uis:IsKeyDown(Enum.KeyCode.Space) then
				moveDirection = moveDirection + Vector3.new(0,1,0)
			end
			if uis:IsKeyDown(Enum.KeyCode.LeftControl) then
				moveDirection = moveDirection + Vector3.new(0,-1,0)
			end
			
			if moveDirection.Magnitude > 0 then
				moveDirection = moveDirection.Unit * speed
			end
			
			bodyVelocity.Velocity = moveDirection
			bodyGyro.CFrame = camera.CFrame
		end)
		
	else
		humanoid.PlatformStand = false
		
		if bodyVelocity then
			bodyVelocity:Destroy()
			bodyVelocity = nil
		end
		
		if bodyGyro then
			bodyGyro:Destroy()
			bodyGyro = nil
		end
		
		runService:UnbindFromRenderStep("Fly")
	end
end

uis.InputBegan:Connect(function(input)
	if input.KeyCode == toggleKey then
		toggleFly()
	end
end)

player.CharacterAdded:Connect(function()
	if flying then
		task.wait(0.5)
		toggleFly()
	end
end)