-- Configuration
local TOP_HEIGHT = 0.5 
local TARGET_PART_NAME = "Part"
local TAG_NAME = "TopBrickApplied"
local CREATED_BRICK_TAG = "GeneratedTopBrick"

local CollectionService = game:GetService("CollectionService")
local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local UserInputService = game:GetService("UserInputService")
local TweenService = game:GetService("TweenService")

local localPlayer = Players.LocalPlayer
local active = false
local currentTransparency = 0.1 

--------------------------------------------------------------------------------
-- 1. UI CREATION
--------------------------------------------------------------------------------

local screenGui = Instance.new("ScreenGui")
screenGui.Name = "System_Final_Draggable"
screenGui.ResetOnSpawn = false
screenGui.Parent = localPlayer:WaitForChild("PlayerGui")

local mainFrame = Instance.new("Frame")
mainFrame.Size = UDim2.new(0, 220, 0, 160)
mainFrame.Position = UDim2.new(0.5, -110, 0.5, -80)
mainFrame.BackgroundColor3 = Color3.fromRGB(25, 25, 28)
mainFrame.BorderSizePixel = 0
mainFrame.Active = true -- Important for dragging
mainFrame.Draggable = false -- We use custom logic for smoothness
mainFrame.Parent = screenGui

Instance.new("UICorner", mainFrame).CornerRadius = UDim.new(0, 10)
local stroke = Instance.new("UIStroke", mainFrame)
stroke.Thickness = 2
stroke.Color = Color3.fromRGB(0, 150, 255)

local titleLabel = Instance.new("TextLabel", mainFrame)
titleLabel.Size = UDim2.new(1, 0, 0, 40)
titleLabel.BackgroundTransparency = 1
titleLabel.Text = "SYSTEM CONTROL V7"
titleLabel.TextColor3 = Color3.new(1, 1, 1)
titleLabel.Font = Enum.Font.GothamBold
titleLabel.TextSize = 13

-- Main Toggle Button
local button = Instance.new("TextButton", mainFrame)
button.Size = UDim2.new(0.9, 0, 0, 42)
button.Position = UDim2.new(0.05, 0, 0.28, 0)
button.BackgroundColor3 = Color3.fromRGB(180, 50, 50)
button.Text = "STATUS: INACTIVE"
button.TextColor3 = Color3.new(1, 1, 1)
button.Font = Enum.Font.GothamSemibold
Instance.new("UICorner", button)

-- Opacity Button
local transButton = Instance.new("TextButton", mainFrame)
transButton.Size = UDim2.new(0.9, 0, 0, 42)
transButton.Position = UDim2.new(0.05, 0, 0.62, 0)
transButton.BackgroundColor3 = Color3.fromRGB(45, 45, 50)
transButton.Text = "OPACITY: 0.1"
transButton.TextColor3 = Color3.new(0.9, 0.9, 0.9)
transButton.Font = Enum.Font.Gotham
Instance.new("UICorner", transButton)

--------------------------------------------------------------------------------
-- 2. ENHANCED DRAGGING SYSTEM
--------------------------------------------------------------------------------

local dragToggle = nil
local dragSpeed = 0.15
local dragStart = nil
local startPos = nil

local function updateInput(input)
	local delta = input.Position - dragStart
	local position = UDim2.new(startPos.X.Scale, startPos.X.Offset + delta.X, startPos.Y.Scale, startPos.Y.Offset + delta.Y)
	TweenService:Create(mainFrame, TweenInfo.new(dragSpeed), {Position = position}):Play()
end

mainFrame.InputBegan:Connect(function(input)
	if (input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch) then
		dragToggle = true
		dragStart = input.Position
		startPos = mainFrame.Position
		
		input.Changed:Connect(function()
			if input.UserInputState == Enum.UserInputState.End then
				dragToggle = false
			end
		end)
	end
end)

UserInputService.InputChanged:Connect(function(input)
	if dragToggle and (input.UserInputType == Enum.UserInputType.MouseMovement or input.UserInputType == Enum.UserInputType.Touch) then
		updateInput(input)
	end
end)

--------------------------------------------------------------------------------
-- 3. CORE LOGIC
--------------------------------------------------------------------------------

local function spawnTopBrick(target)
	if CollectionService:HasTag(target, TAG_NAME) then return end
	
	local topBrick = Instance.new("Part")
	topBrick.Name = "TopBrick"
	topBrick.Size = Vector3.new(target.Size.X, TOP_HEIGHT, target.Size.Z)
	topBrick.Anchored = true
	topBrick.CanCollide = false 
	topBrick.BrickColor = BrickColor.new("Bright red")
	topBrick.Material = Enum.Material.Glass
	topBrick.Transparency = currentTransparency
	
	-- Rotational placement fix
	topBrick.CFrame = target.CFrame * CFrame.new(0, (target.Size.Y/2) + (TOP_HEIGHT/2), 0)
	topBrick.Parent = game.Workspace
	
	CollectionService:AddTag(target, TAG_NAME)
	CollectionService:AddTag(topBrick, CREATED_BRICK_TAG)
end

-- Transparency Button Loop (0.1 to 1.0)
transButton.MouseButton1Click:Connect(function()
	currentTransparency = currentTransparency + 0.1
	if currentTransparency > 1.01 then 
		currentTransparency = 0.1
	end
	
	local cleanVal = math.floor(currentTransparency * 10 + 0.5) / 10
	transButton.Text = "OPACITY: " .. tostring(cleanVal)
	
	for _, brick in ipairs(CollectionService:GetTagged(CREATED_BRICK_TAG)) do
		brick.Transparency = cleanVal
	end
end)

-- Main Activation
button.MouseButton1Click:Connect(function()
	active = not active
	local targetColor = active and Color3.fromRGB(50, 180, 100) or Color3.fromRGB(180, 50, 50)
	button.Text = active and "STATUS: ACTIVE" or "STATUS: INACTIVE"
	TweenService:Create(button, TweenInfo.new(0.3), {BackgroundColor3 = targetColor}):Play()
	
	if active then
		task.spawn(function()
			for _, obj in ipairs(game.Workspace:GetDescendants()) do
				if obj:IsA("BasePart") and obj.Name == TARGET_PART_NAME then
					spawnTopBrick(obj)
				end
			end
		end)
	else
		for _, b in ipairs(CollectionService:GetTagged(CREATED_BRICK_TAG)) do b:Destroy() end
		for _, t in ipairs(CollectionService:GetTagged(TAG_NAME)) do CollectionService:RemoveTag(t, TAG_NAME) end
	end
end)

-- Player Visibility Loop
RunService.RenderStepped:Connect(function()
	if active then
		for _, player in ipairs(Players:GetPlayers()) do
			if player.Character then
				for _, part in ipairs(player.Character:GetDescendants()) do
					if (part:IsA("BasePart") or part:IsA("Decal")) and part.Transparency > 0 then
						part.Transparency = 0 
					end
				end
			end
		end
	end
end)