---

local Players = game:GetService("Players")
local UIS = game:GetService("UserInputService")

local player = Players.LocalPlayer
local backpack = player:WaitForChild("Backpack")

local gui = script.Parent
local frame = gui:WaitForChild("InventoryFrame")
local template = frame:WaitForChild("ItemTemplate")
template.Visible = false

local opened = false

local function tools()
	local t = {}
	for _, v in ipairs(backpack:GetChildren()) do
		if v:IsA("Tool") then t[#t + 1] = v end
	end
	local char = player.Character
	if char then
		for _, v in ipairs(char:GetChildren()) do
			if v:IsA("Tool") then t[#t + 1] = v end
		end
	end
	return t
end

local function equipToggle(tool)
	local char = player.Character or player.CharacterAdded:Wait()
	local hum = char:FindFirstChildOfClass("Humanoid")
	if not hum or not tool then return end
	if tool.Parent == char then hum:UnequipTools() else hum:EquipTool(tool) end
end

local function makePreview(button, tool)
	local vp = button:FindFirstChild("Preview") or Instance.new("ViewportFrame")
	vp.Name, vp.Parent = "Preview", button
	vp.Size, vp.Position = UDim2.new(1, -8, 1, -30), UDim2.new(0, 4, 0, 4)
	vp.BackgroundTransparency, vp.BorderSizePixel = 0.2, 0
	for _, c in ipairs(vp:GetChildren()) do c:Destroy() end

	local h = tool:FindFirstChild("Handle")
	if not (h and h:IsA("BasePart")) then return end

	local wm = Instance.new("WorldModel", vp)
	local p = h:Clone(); p.Anchored = true; p.CanCollide = false; p.CFrame = CFrame.new(); p.Parent = wm
	local cam = Instance.new("Camera", vp); vp.CurrentCamera = cam
	local s = math.max(p.Size.X, p.Size.Y, p.Size.Z)
	local d = math.max(3, s * 2.2)
	cam.CFrame = CFrame.new(d, d * 0.7, d, 0, 0, 0)
end

local function refresh()
	for _, c in ipairs(frame:GetChildren()) do
		if c:IsA("TextButton") and c ~= template then c:Destroy() end
	end

	for _, tool in ipairs(tools()) do
		local b = template:Clone()
		b.Visible, b.Text, b.Name, b.Parent = true, "", tool.Name .. "_Btn", frame
		b.Size = UDim2.new(0, 120, 0, 120)

		local name = b:FindFirstChild("ItemName") or Instance.new("TextLabel")
		name.Name, name.Parent = "ItemName", b
		name.Size, name.Position = UDim2.new(1, -8, 0, 22), UDim2.new(0, 4, 1, -24)
		name.BackgroundTransparency, name.TextScaled, name.Text = 1, true, tool.Name

		makePreview(b, tool)
		b.MouseButton1Click:Connect(function() equipToggle(tool); refresh() end)
	end
end

UIS.InputBegan:Connect(function(input, gp)
	if gp then return end
	if input.KeyCode == Enum.KeyCode.M then
		opened = not opened
		frame.Visible = opened
		if opened then refresh() end
	elseif input.KeyCode == Enum.KeyCode.Q then
		local hum = player.Character and player.Character:FindFirstChildOfClass("Humanoid")
		if hum then hum:UnequipTools(); if opened then refresh() end end
	end
end)

local function bindChar(char)
	char.ChildAdded:Connect(function(c) if opened and c:IsA("Tool") then refresh() end end)
	char.ChildRemoved:Connect(function(c) if opened and c:IsA("Tool") then refresh() end end)
end

backpack.ChildAdded:Connect(function(c) if opened and c:IsA("Tool") then refresh() end end)
backpack.ChildRemoved:Connect(function(c) if opened and c:IsA("Tool") then refresh() end end)

if player.Character then bindChar(player.Character) end
player.CharacterAdded:Connect(function(char) bindChar(char); if opened then refresh() end end)