-- OneScriptFollower.lua
-- Works in your own Roblox Studio game only.

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local UIS = game:GetService("UserInputService")
local LocalPlayer = Players.LocalPlayer

math.randomseed(tick())

-- === Helper Functions ===
local function getValidTargets()
	local list = {}
	for _, p in ipairs(Players:GetPlayers()) do
		if p ~= LocalPlayer and p.Character and p.Character:FindFirstChild("HumanoidRootPart") then
			local hum = p.Character:FindFirstChild("Humanoid")
			if hum and hum.Health > 0 then
				table.insert(list, p)
			end
		end
	end
	return list
end

local function pickRandomTarget()
	local list = getValidTargets()
	if #list == 0 then return nil end
	return list[math.random(1, #list)]
end

-- === GUI Setup ===
local playerGui = LocalPlayer:WaitForChild("PlayerGui")

local screenGui = Instance.new("ScreenGui")
screenGui.Name = "FollowerGUI"
screenGui.ResetOnSpawn = false
screenGui.Parent = playerGui

local frame = Instance.new("Frame")
frame.Size = UDim2.new(0, 300, 0, 100)
frame.Position = UDim2.new(0.5, -150, 0.85, -50)
frame.BackgroundColor3 = Color3.fromRGB(30, 30, 30)
frame.BackgroundTransparency = 0.1
frame.BorderSizePixel = 0
frame.Parent = screenGui

-- Title Bar (for dragging + minimize)
local titleBar = Instance.new("Frame")
titleBar.Size = UDim2.new(1, 0, 0, 25)
titleBar.BackgroundColor3 = Color3.fromRGB(20, 20, 20)
titleBar.BorderSizePixel = 0
titleBar.Parent = frame

local titleLabel = Instance.new("TextLabel")
titleLabel.Size = UDim2.new(1, -25, 1, 0)
titleLabel.Position = UDim2.new(0, 5, 0, 0)
titleLabel.BackgroundTransparency = 1
titleLabel.Text = "Follower GUI"
titleLabel.TextColor3 = Color3.new(1, 1, 1)
titleLabel.TextXAlignment = Enum.TextXAlignment.Left
titleLabel.Parent = titleBar

local minimizeButton = Instance.new("TextButton")
minimizeButton.Size = UDim2.new(0, 25, 1, 0)
minimizeButton.Position = UDim2.new(1, -25, 0, 0)
minimizeButton.BackgroundColor3 = Color3.fromRGB(50, 50, 50)
minimizeButton.Text = "-"
minimizeButton.TextColor3 = Color3.new(1, 1, 1)
minimizeButton.Parent = titleBar

-- Buttons
local contentFrame = Instance.new("Frame")
contentFrame.Size = UDim2.new(1, 0, 1, -25)
contentFrame.Position = UDim2.new(0, 0, 0, 25)
contentFrame.BackgroundTransparency = 1
contentFrame.Parent = frame

local prevBtn = Instance.new("TextButton")
prevBtn.Size = UDim2.new(0.45, 0, 0.6, 0)
prevBtn.Position = UDim2.new(0.03, 0, 0.25, 0)
prevBtn.Text = "Previous"
prevBtn.BackgroundColor3 = Color3.fromRGB(255, 100, 100)
prevBtn.TextColor3 = Color3.new(1, 1, 1)
prevBtn.Parent = contentFrame

local nextBtn = Instance.new("TextButton")
nextBtn.Size = UDim2.new(0.45, 0, 0.6, 0)
nextBtn.Position = UDim2.new(0.52, 0, 0.25, 0)
nextBtn.Text = "Next"
nextBtn.BackgroundColor3 = Color3.fromRGB(100, 255, 100)
nextBtn.TextColor3 = Color3.new(0, 0, 0)
nextBtn.Parent = contentFrame

local label = Instance.new("TextLabel")
label.Size = UDim2.new(1, 0, 0.25, 0)
label.Position = UDim2.new(0, 0, -0.15, 0)
label.BackgroundTransparency = 1
label.Text = "Target: none"
label.TextColor3 = Color3.new(1, 1, 1)
label.TextScaled = true
label.Parent = contentFrame

-- === Dragging Logic ===
local dragging = false
local dragStart, startPos

local function updateDrag(input)
	local delta = input.Position - dragStart
	frame.Position = UDim2.new(startPos.X.Scale, startPos.X.Offset + delta.X, startPos.Y.Scale, startPos.Y.Offset + delta.Y)
end

titleBar.InputBegan:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseButton1 then
		dragging = true
		dragStart = input.Position
		startPos = frame.Position
		input.Changed:Connect(function()
			if input.UserInputState == Enum.UserInputState.End then
				dragging = false
			end
		end)
	end
end)

UIS.InputChanged:Connect(function(input)
	if dragging and input.UserInputType == Enum.UserInputType.MouseMovement then
		updateDrag(input)
	end
end)

-- === Minimize Logic ===
local minimized = false
minimizeButton.MouseButton1Click:Connect(function()
	minimized = not minimized
	if minimized then
		contentFrame.Visible = false
		frame.Size = UDim2.new(0, 300, 0, 25)
		minimizeButton.Text = "+"
	else
		contentFrame.Visible = true
		frame.Size = UDim2.new(0, 300, 0, 100)
		minimizeButton.Text = "-"
	end
end)

-- === Follow Logic ===
local following = false
local targetPlayer = nil
local hbConn, targetDiedConn, targetRemoveConn

local function cleanup()
	if hbConn then hbConn:Disconnect() hbConn = nil end
	if targetDiedConn then targetDiedConn:Disconnect() targetDiedConn = nil end
	if targetRemoveConn then targetRemoveConn:Disconnect() targetRemoveConn = nil end
end

local function stopFollowing()
	following = false
	targetPlayer = nil
	label.Text = "Target: none"
	cleanup()
end

local function follow(target)
	if not target or not target.Character or not target.Character:FindFirstChild("HumanoidRootPart") then
		stopFollowing()
		return
	end

	targetPlayer = target
	following = true
	label.Text = "Target: " .. target.Name
	cleanup()

	local hum = target.Character:FindFirstChild("Humanoid")
	if hum then
		targetDiedConn = hum.Died:Connect(function()
			wait(0.2)
			local newTarget = pickRandomTarget()
			if newTarget then follow(newTarget) else stopFollowing() end
		end)
	end

	targetRemoveConn = target.AncestryChanged:Connect(function(_, parent)
		if not parent then
			local newTarget = pickRandomTarget()
			if newTarget then follow(newTarget) else stopFollowing() end
		end
	end)

	local offset = CFrame.new(2, 0, 0)
	hbConn = RunService.Heartbeat:Connect(function()
		if not following or not targetPlayer then return end
		local myChar = LocalPlayer.Character
		local tChar = targetPlayer.Character
		if not myChar or not tChar then stopFollowing() return end
		local myHRP = myChar:FindFirstChild("HumanoidRootPart")
		local tHRP = tChar:FindFirstChild("HumanoidRootPart")
		if not myHRP or not tHRP then stopFollowing() return end
		myHRP.CFrame = myHRP.CFrame:Lerp(tHRP.CFrame * offset, 0.6)
	end)
end

nextBtn.MouseButton1Click:Connect(function()
	local t = pickRandomTarget()
	if t then follow(t) else label.Text = "Target: none (no players)" end
end)

prevBtn.MouseButton1Click:Connect(stopFollowing)

-- === Reset on Death Logic ===
local function onCharacterAdded(char)
	local hum = char:WaitForChild("Humanoid")
	hum.Died:Connect(function()
		stopFollowing()
		task.wait(3) -- optional short delay
		LocalPlayer:LoadCharacter()
	end)
end

onCharacterAdded(LocalPlayer.Character or LocalPlayer.CharacterAdded:Wait())
LocalPlayer.CharacterAdded:Connect(onCharacterAdded)