-- Roblox LocalScript GUI: compact NPC-only cycler, mobile draggable, adjustable damage

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

local function getRemote()
 local backpack = player:WaitForChild("Backpack")
 local tool = backpack:FindFirstChild("Dragon's Cannon") or player.Character:WaitForChild("Dragon's Cannon",5)
 if not tool then return nil end
 return tool:WaitForChild("RemoteFunction")
end

local gui = Instance.new("ScreenGui")
gui.Name = "NPCHitGUI"
gui.ResetOnSpawn = true
gui.Parent = player:WaitForChild("PlayerGui")

local frame = Instance.new("Frame")
frame.Size = UDim2.new(0, 250, 0, 180)
frame.Position = UDim2.new(0.5, -125, 0.5, -90)
frame.BackgroundColor3 = Color3.fromRGB(20,20,26)
frame.BorderSizePixel = 0
frame.Parent = gui
Instance.new("UICorner", frame).CornerRadius = UDim.new(0,12)

local title = Instance.new("TextLabel")
title.Size = UDim2.new(1,0,0,30)
title.BackgroundTransparency = 1
title.Text = "NPC Cycler"
title.Font = Enum.Font.GothamBold
title.TextSize = 16
title.TextColor3 = Color3.fromRGB(255,255,255)
title.Parent = frame

local status = Instance.new("TextLabel")
status.Size = UDim2.new(1,-10,0,18)
status.Position = UDim2.new(0,5,0,28)
status.BackgroundTransparency = 1
status.Text = "Idle"
status.Font = Enum.Font.Gotham
status.TextSize = 12
status.TextColor3 = Color3.fromRGB(180,180,180)
status.Parent = frame

local dmgBox = Instance.new("TextBox")
dmgBox.Size = UDim2.new(1,-20,0,28)
dmgBox.Position = UDim2.new(0,10,0,52)
dmgBox.Text = "200"
dmgBox.PlaceholderText = "Damage"
dmgBox.Font = Enum.Font.Gotham
dmgBox.TextSize = 14
dmgBox.BackgroundColor3 = Color3.fromRGB(34,34,42)
dmgBox.TextColor3 = Color3.fromRGB(255,255,255)
dmgBox.BorderSizePixel = 0
dmgBox.Parent = frame
Instance.new("UICorner", dmgBox).CornerRadius = UDim.new(0,8)

local startBtn = Instance.new("TextButton")
startBtn.Size = UDim2.new(1,-20,0,34)
startBtn.Position = UDim2.new(0,10,0,92)
startBtn.Text = "START"
startBtn.Font = Enum.Font.GothamBold
startBtn.TextSize = 14
startBtn.BackgroundColor3 = Color3.fromRGB(0,170,120)
startBtn.TextColor3 = Color3.new(1,1,1)
startBtn.BorderSizePixel = 0
startBtn.Parent = frame
Instance.new("UICorner", startBtn).CornerRadius = UDim.new(0,8)

local stopBtn = Instance.new("TextButton")
stopBtn.Size = UDim2.new(1,-20,0,34)
stopBtn.Position = UDim2.new(0,10,0,134)
stopBtn.Text = "STOP"
stopBtn.Font = Enum.Font.GothamBold
stopBtn.TextSize = 14
stopBtn.BackgroundColor3 = Color3.fromRGB(190,60,60)
stopBtn.TextColor3 = Color3.new(1,1,1)
stopBtn.BorderSizePixel = 0
stopBtn.Parent = frame
Instance.new("UICorner", stopBtn).CornerRadius = UDim.new(0,8)

-- Mobile + PC draggable
local dragging = false
local dragInput, dragStart, startPos

frame.InputBegan:Connect(function(input)
 if input.UserInputType == Enum.UserInputType.MouseButton1 or input.UserInputType == Enum.UserInputType.Touch 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)

frame.InputChanged:Connect(function(input)
 if input.UserInputType == Enum.UserInputType.MouseMovement or input.UserInputType == Enum.UserInputType.Touch then
  dragInput = input
 end
end)

UIS.InputChanged:Connect(function(input)
 if dragging and input == dragInput then
  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
end)

local running = false

local function isNPC(h)
 return h and h.Parent and Players:GetPlayerFromCharacter(h.Parent) == nil
end

local function getNPCs()
 local list = {}
 for _,obj in ipairs(workspace:GetDescendants()) do
  if obj:IsA("Humanoid") and isNPC(obj) then
   table.insert(list,obj)
  end
 end
 return list
end

local function hit(h,dmg)
 local remote = getRemote()
 if not remote then return end
 local args = {
  "hit",
  {h, dmg}
 }
 remote:InvokeServer(unpack(args))
end

startBtn.MouseButton1Click:Connect(function()
 if running then return end
 running = true
 task.spawn(function()
  while running do
   local npcs = getNPCs()
   local dmg = tonumber(dmgBox.Text) or 200
   for i,v in ipairs(npcs) do
    if not running then break end
    if v and v.Parent then
     status.Text = v.Parent.Name .. " ("..i.."/"..#npcs..")"
     pcall(function() hit(v,dmg) end)
     task.wait(0.1)
    end
   end
   task.wait(0.1)
  end
  status.Text = "Stopped"
 end)
end)

stopBtn.MouseButton1Click:Connect(function()
 running = false
end)