repeat wait() until game:IsLoaded()

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local VirtualInputManager = game:GetService("VirtualInputManager")
local Camera = workspace.CurrentCamera
local LocalPlayer = Players.LocalPlayer

local lockEnabled = false
local target = nil
local targetPart = nil
local isFiring = false

-- GUI
local gui = Instance.new("ScreenGui", game.CoreGui)
gui.Name = "PerfectLockGUI"

local toggleBtn = Instance.new("TextButton", gui)
toggleBtn.Size = UDim2.new(0, 140, 0, 50)
toggleBtn.Position = UDim2.new(0.5, -70, 0.9, 0)
toggleBtn.BackgroundColor3 = Color3.fromRGB(30, 30, 30)
toggleBtn.TextColor3 = Color3.fromRGB(255, 255, 255)
toggleBtn.Font = Enum.Font.GothamBold
toggleBtn.TextSize = 20
toggleBtn.Text = "🔓 Lock OFF"
toggleBtn.BorderSizePixel = 0
toggleBtn.Draggable = true

-- Get target by center aim
local function getClosestTarget()
	local closest, shortest = nil, math.huge
	for _, plr in ipairs(Players:GetPlayers()) do
		if plr ~= LocalPlayer and plr.Character and plr.Character:FindFirstChild("Head") then
			local head = plr.Character.Head
			local pos, onScreen = Camera:WorldToViewportPoint(head.Position)
			if onScreen then
				local screenPos = Vector2.new(pos.X, pos.Y)
				local center = Vector2.new(Camera.ViewportSize.X / 2, Camera.ViewportSize.Y / 2)
				local dist = (screenPos - center).Magnitude
				if dist < 100 and dist < shortest then
					shortest = dist
					closest = plr
				end
			end
		end
	end
	return closest
end

local function lockCameraToPart(part, velocity)
	local predictionTime = 0.16
	local predicted = part.Position + (velocity * predictionTime)
	Camera.CFrame = CFrame.new(Camera.CFrame.Position, predicted + Vector3.new(0, 0.03, 0))
end

local function getRandomBodyPart(char)
	local parts = {"Head","UpperTorso","LowerTorso","HumanoidRootPart","LeftUpperArm","RightUpperArm","LeftLowerArm","RightLowerArm","LeftLeg","RightLeg"}
	local valid = {}
	for _, p in ipairs(parts) do
		if char:FindFirstChild(p) then table.insert(valid, char[p]) end
	end
	return #valid > 0 and valid[math.random(1, #valid)] or char:FindFirstChild("Head")
end

local function startShooting()
	if not isFiring then
		isFiring = true
		VirtualInputManager:SendMouseButtonEvent(0, 0, 0, true, game, 0)
	end
end

local function stopShooting()
	if isFiring then
		isFiring = false
		VirtualInputManager:SendMouseButtonEvent(0, 0, 0, false, game, 0)
	end
end

RunService.RenderStepped:Connect(function()
	if lockEnabled then
		if not target or not target.Character or not target.Character:FindFirstChild("HumanoidRootPart") then
			target = getClosestTarget()
			targetPart = target and getRandomBodyPart(target.Character)
		end

		if target and target.Character and targetPart then
			local hrp = target.Character:FindFirstChild("HumanoidRootPart")
			if hrp then
				lockCameraToPart(targetPart, hrp.Velocity)
				startShooting()
			end
		else
			stopShooting()
		end
	else
		target = nil
		targetPart = nil
		stopShooting()
	end
end)

toggleBtn.MouseButton1Click:Connect(function()
	lockEnabled = not lockEnabled
	toggleBtn.Text = lockEnabled and "✅ Lock ON" or "🔓 Lock OFF"
	if not lockEnabled then
		target = nil
		targetPart = nil
		stopShooting()
	end
end)