--[[==================================================
     NAME DISPLAY + AIM LOCK SCRIPT (ALL-IN-ONE)
     - Shows display name above players' heads
     - Locks camera on nearest torso while holding RMB
==================================================]]

-- Services
local Players = game:GetService("Players")
local LocalPlayer = Players.LocalPlayer
local RunService = game:GetService("RunService")
local UIS = game:GetService("UserInputService")
local Camera = workspace.CurrentCamera
local mouse = LocalPlayer:GetMouse()

-----------------------------------------------------
-- 1. NAME DISPLAY ABOVE HEAD
-----------------------------------------------------
local function addNameTag(character, plr)
	local head = character:WaitForChild("Head", 5)
	if not head then return end

	local billboard = Instance.new("BillboardGui")
	billboard.Parent = head
	billboard.Adornee = head
	billboard.Size = UDim2.new(0, 200, 0, 50)
	billboard.StudsOffset = Vector3.new(0, 3.2, 0)
	billboard.AlwaysOnTop = true

	local nameLabel = Instance.new("TextLabel")
	nameLabel.Parent = billboard
	nameLabel.BackgroundTransparency = 1
	nameLabel.AnchorPoint = Vector2.new(0.5, 0.5)
	nameLabel.Position = UDim2.new(0.5, 0, 0.5, 0)
	nameLabel.Text = plr.DisplayName
	nameLabel.TextColor3 = Color3.new(1, 1, 1)
	nameLabel.TextStrokeTransparency = 0.5
	nameLabel.Font = Enum.Font.GothamBold
	nameLabel.TextScaled = false
	nameLabel.TextSize = 18

	RunService.RenderStepped:Connect(function()
		if head and head:IsDescendantOf(workspace) then
			local distance = (Camera.CFrame.Position - head.Position).Magnitude
			local size = math.clamp(30 - distance / 4, 10, 30)
			nameLabel.TextSize = size
		end
	end)
end

local function onCharacterAdded(character, plr)
	addNameTag(character, plr)
end

for _, plr in pairs(Players:GetPlayers()) do
	if plr ~= LocalPlayer then
		plr.CharacterAdded:Connect(function(char)
			onCharacterAdded(char, plr)
		end)
		if plr.Character then
			onCharacterAdded(plr.Character, plr)
		end
	end
end

Players.PlayerAdded:Connect(function(plr)
	if plr ~= LocalPlayer then
		plr.CharacterAdded:Connect(function(char)
			onCharacterAdded(char, plr)
		end)
	end
end)

-----------------------------------------------------
-- 2. AIM LOCK (RIGHT MOUSE BUTTON)
-----------------------------------------------------
local holding = false
local lockedTarget = nil

-- Find closest player's torso (HumanoidRootPart) to your mouse
local function getClosestTorso()
	local closest, shortest = nil, math.huge
	for _, plr in pairs(Players:GetPlayers()) do
		if plr ~= LocalPlayer and plr.Character and plr.Character:FindFirstChild("HumanoidRootPart") then
			local torso = plr.Character.HumanoidRootPart
			local pos, onScreen = Camera:WorldToViewportPoint(torso.Position)
			if onScreen then
				local dist = (Vector2.new(pos.X, pos.Y) - Vector2.new(mouse.X, mouse.Y)).Magnitude
				if dist < shortest then
					shortest = dist
					closest = torso
				end
			end
		end
	end
	return closest
end

-- Update camera to locked target
RunService.RenderStepped:Connect(function()
	if holding and lockedTarget then
		if lockedTarget.Parent and lockedTarget:IsDescendantOf(workspace) then
			Camera.CFrame = CFrame.new(Camera.CFrame.Position, lockedTarget.Position)
		else
			lockedTarget = nil
		end
	end
end)

UIS.InputBegan:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseButton2 then
		if not holding then
			lockedTarget = getClosestTorso()
			holding = true
		end
	end
end)

UIS.InputEnded:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseButton2 then
		holding = false
		lockedTarget = nil
	end
end)