local Players = game:GetService("Players")
local player = Players.LocalPlayer
local gui = Instance.new("ScreenGui", player:WaitForChild("PlayerGui"))
gui.Name = "TurnBattlePixelGUI"
gui.ResetOnSpawn = false


local TOTAL_MONSTERS = 15
local MAX_HP = 120

local monsters = {
	{name="Slime",baseHp=40,image="rbxassetid://872974408"},
	{name="Bat",baseHp=55,image="rbxassetid://4018901703"},
	{name="Skeleton",baseHp=75,image="rbxassetid://426644465"},
	{name="Golem",baseHp=110,image="rbxassetid://216330870"},
	{name="Dragon",baseHp=160,image="rbxassetid://57248129"},
	{name="Goblin",baseHp=180,image="rbxassetid://321719167"},
	{name="Zombie",baseHp=200,image="rbxassetid://2716943898"},
	{name="Witch",baseHp=230,image="rbxassetid://6740442482"},
	{name="Knight",baseHp=260,image="rbxassetid://112804846"},
	{name="Demon",baseHp=300,image="rbxassetid://10528567067"},
	{name="Ogre",baseHp=350,image="rbxassetid://1666920728"},
	{name="Phantom",baseHp=400,image="rbxassetid://2289826763"},
	{name="Hydra",baseHp=480,image="rbxassetid://151340278"},
	{name="Titan",baseHp=600,image="rbxassetid://176863221"},
	{name="Dark Lord",baseHp=750,image="rbxassetid://9856271964"},
}


local shopItems = {
	{name="Wood Sword",dmg=25,cost=0,type="weapon"},
	{name="Iron Sword",dmg=35,cost=25,type="weapon"},
	{name="Steel Blade",dmg=50,cost=50,type="weapon"},
	{name="Magic Edge",dmg=70,cost=85,type="weapon"},
	{name="Dragon Slayer",dmg=100,cost=120,type="weapon"},
	{name="Celestial Saber",dmg=140,cost=180,type="weapon"},
	{name="Health Potion (+60 HP)",heal=60,cost=25,type="potion"},
	{name="Leather Armor",reduction=0.1,cost=20,type="armor"},
	{name="Chainmail Armor",reduction=0.2,cost=50,type="armor"},
	{name="Steel Armor",reduction=0.35,cost=90,type="armor"},
}


local frame = Instance.new("Frame", gui)
frame.Size = UDim2.new(0, 560, 0, 380)
frame.Position = UDim2.new(0.5, -280, 0.5, -190)
frame.BackgroundColor3 = Color3.fromRGB(18,18,25)
frame.BorderSizePixel = 0

local title = Instance.new("TextLabel", frame)
title.AnchorPoint = Vector2.new(0.5,0)
title.Position = UDim2.new(0.5, 0, 0, 8)
title.Size = UDim2.new(0.9, 0, 0, 36)
title.BackgroundTransparency = 1
title.Text = "⚔️ Retro Turn Battle"
title.TextScaled = true
title.TextColor3 = Color3.fromRGB(255,255,255)
title.Font = Enum.Font.SourceSansBold

local battleArea = Instance.new("Frame", frame)
battleArea.Size = UDim2.new(0.96, 0, 0.6, 0)
battleArea.Position = UDim2.new(0.02, 0, 0.12, 0)
battleArea.BackgroundTransparency = 1

local playerSprite = Instance.new("ImageLabel", battleArea)
playerSprite.Size = UDim2.new(0, 110, 0, 110)
playerSprite.Position = UDim2.new(0.06, 0, 0.15, 0)
playerSprite.BackgroundTransparency = 1
playerSprite.Image = "rbxassetid://0"

local monsterContainer = Instance.new("Frame", battleArea)
monsterContainer.Size = UDim2.new(0, 220, 0, 170)
monsterContainer.Position = UDim2.new(0.52, 0, 0.12, 0)
monsterContainer.BackgroundTransparency = 1

local monsterImage = Instance.new("ImageLabel", monsterContainer)
monsterImage.Size = UDim2.new(0, 160, 0, 120)
monsterImage.Position = UDim2.new(0.5, -80, 0, 0)
monsterImage.BackgroundTransparency = 1
monsterImage.Image = "rbxassetid://0"

local monsterNameLabel = Instance.new("TextLabel", monsterContainer)
monsterNameLabel.Size = UDim2.new(1, 0, 0, 24)
monsterNameLabel.Position = UDim2.new(0, 0, 0.73, 0)
monsterNameLabel.BackgroundTransparency = 1
monsterNameLabel.TextScaled = true
monsterNameLabel.TextColor3 = Color3.new(1,1,1)
monsterNameLabel.Font = Enum.Font.SourceSansBold

local playerHPLabel = Instance.new("TextLabel", frame)
playerHPLabel.Position = UDim2.new(0.06, 0, 0.74, 0)
playerHPLabel.Size = UDim2.new(0.4, 0, 0, 28)
playerHPLabel.BackgroundTransparency = 1
playerHPLabel.TextScaled = true
playerHPLabel.TextColor3 = Color3.fromRGB(141,255,147)

local monsterHPLabel = Instance.new("TextLabel", frame)
monsterHPLabel.Position = UDim2.new(0.54, 0, 0.74, 0)
monsterHPLabel.Size = UDim2.new(0.4, 0, 0, 28)
monsterHPLabel.BackgroundTransparency = 1
monsterHPLabel.TextScaled = true
monsterHPLabel.TextColor3 = Color3.fromRGB(255,150,150)

local infoLabel = Instance.new("TextLabel", frame)
infoLabel.Position = UDim2.new(0.05, 0, 0.82, 0)
infoLabel.Size = UDim2.new(0.9, 0, 0, 30)
infoLabel.BackgroundTransparency = 1
infoLabel.TextScaled = true
infoLabel.TextColor3 = Color3.fromRGB(220,220,220)
infoLabel.Text = "Battle Start!"

local attackBtn = Instance.new("TextButton", frame)
attackBtn.Position = UDim2.new(0.05, 0, 0.88, 0)
attackBtn.Size = UDim2.new(0.25, 0, 0.08, 0)
attackBtn.Text = "Attack ⚔️"
attackBtn.TextScaled = true

local usePotionBtn = Instance.new("TextButton", frame)
usePotionBtn.Position = UDim2.new(0.35, 0, 0.88, 0)
usePotionBtn.Size = UDim2.new(0.25, 0, 0.08, 0)
usePotionBtn.Text = "Use Potion 💖"
usePotionBtn.TextScaled = true

local shopBtn = Instance.new("TextButton", frame)
shopBtn.Position = UDim2.new(0.66, 0, 0.88, 0)
shopBtn.Size = UDim2.new(0.28, 0, 0.08, 0)
shopBtn.Text = "Shop 🛒"
shopBtn.TextScaled = true


local shopFrame = Instance.new("Frame", gui)
shopFrame.Size = UDim2.new(0,420,0,320)
shopFrame.Position = UDim2.new(0.5,-210,0.5,-160)
shopFrame.BackgroundColor3 = Color3.fromRGB(28,28,36)
shopFrame.Visible = false

local shopTitle = Instance.new("TextLabel", shopFrame)
shopTitle.Size = UDim2.new(1,0,0,36)
shopTitle.Text = "Shop"
shopTitle.TextScaled = true
shopTitle.BackgroundTransparency = 1
shopTitle.TextColor3 = Color3.new(1,1,1)
shopTitle.Font = Enum.Font.SourceSansBold

local coinsLabel = Instance.new("TextLabel", shopFrame)
coinsLabel.Size = UDim2.new(1,0,0,24)
coinsLabel.Position = UDim2.new(0,0,0.12,0)
coinsLabel.Text = "Coins: 0"
coinsLabel.TextScaled = true
coinsLabel.BackgroundTransparency = 1
coinsLabel.TextColor3 = Color3.fromRGB(255,255,150)

local backShopBtn = Instance.new("TextButton", shopFrame)
backShopBtn.Size = UDim2.new(0.3,0,0.12,0)
backShopBtn.Position = UDim2.new(0.35,0,0.85,0)
backShopBtn.Text = "Back"
backShopBtn.TextScaled = true

local shopButtons = {}
for i,item in ipairs(shopItems) do
	local btn = Instance.new("TextButton", shopFrame)
	btn.Size = UDim2.new(0.9,0,0,36)
	btn.Position = UDim2.new(0.05,0,0.18+(i-1)*0.1,0)
	btn.TextScaled = true
	btn.Text = (item.type=="weapon" and (item.name.." ("..item.dmg.." dmg)") or item.type=="armor" and (item.name.." ("..(item.reduction*100).."%)") or item.name).." - "..item.cost.."c"
	shopButtons[i] = btn
end


local coins = 0
local potions = 0
local monstersDefeated = 0
local currentMonsterHP = 0
local currentMonsterIndex = 1
local playerHP = MAX_HP
local weapon = shopItems[1]
local currentArmor = nil
local turn = "player"

local function updateHUD()
	playerHPLabel.Text = "Player HP: "..playerHP.."/"..MAX_HP
	monsterHPLabel.Text = "Monster HP: "..math.max(currentMonsterHP,0)
	coinsLabel.Text = "Coins: "..coins.." | Potions: "..potions
end


local function newMonster()
	monstersDefeated += 1
	currentMonsterIndex = math.clamp(monstersDefeated,1,#monsters)
	local data = monsters[currentMonsterIndex]
	currentMonsterHP = data.baseHp + (monstersDefeated * 8)
	monsterNameLabel.Text = data.name.." (Lv "..monstersDefeated..")"
	monsterImage.Image = data.image
	infoLabel.Text = "A wild "..data.name.." appears!"

	-- Add Mega Potion to shop after round 8
	local megaExists = false
	for _,item in ipairs(shopItems) do
		if item.name == "Mega Potion (+120 HP)" then
			megaExists = true
			break
		end
	end
	if monstersDefeated >= 8 and not megaExists then
		table.insert(shopItems, {name="Mega Potion (+120 HP)",heal=120,cost=50,type="potion"})
		local btn = Instance.new("TextButton", shopFrame)
		btn.Size = UDim2.new(0.9,0,0,36)
		btn.Position = UDim2.new(0.05,0,0.18+(#shopItems-1)*0.1,0)
		btn.TextScaled = true
		btn.Text = "Mega Potion (+120 HP) - 50c"
		shopButtons[#shopButtons+1] = btn
		btn.MouseButton1Click:Connect(function()
			local item = shopItems[#shopItems]
			if coins < item.cost then
				infoLabel.Text = "Not enough coins!"
				return
			end
			coins -= item.cost
			potions += 1
			infoLabel.Text = "Bought a Mega Potion! You now have "..potions.."."
			updateHUD()
		end)
	end

	updateHUD()
end

local function endGame(result)
	local overlay = Instance.new("Frame", gui)
	overlay.Size = UDim2.new(1,0,1,0)
	overlay.BackgroundColor3 = Color3.new(0,0,0)
	overlay.BackgroundTransparency = 0.4
	local msg = Instance.new("TextLabel", overlay)
	msg.Size = UDim2.new(1,0,0,50)
	msg.Position = UDim2.new(0,0,0.4,0)
	msg.Text = result=="win" and "🏆 You defeated all monsters!" or "💀 You were defeated!"
	msg.TextScaled = true
	msg.BackgroundTransparency = 1
	msg.TextColor3 = Color3.new(1,1,1)
	local restart = Instance.new("TextButton", overlay)
	restart.Size = UDim2.new(0.3,0,0.08,0)
	restart.Position = UDim2.new(0.35,0,0.6,0)
	restart.Text = "Restart"
	restart.TextScaled = true
	restart.MouseButton1Click:Connect(function()
		gui:Destroy()
		script:Destroy()
	end)
end


attackBtn.MouseButton1Click:Connect(function()
	if turn ~= "player" then return end
	turn = "busy"
	
	-- Give 5 coins per attack
	coins += 5
	
	local dmg = weapon.dmg
	currentMonsterHP -= dmg
	infoLabel.Text = "You dealt "..dmg.." damage! +5 coins"
	updateHUD()

	if currentMonsterHP <= 0 then
		coins += 25 -- coins for killing monster
		infoLabel.Text = "Monster defeated! +25 coins"
		if monstersDefeated >= TOTAL_MONSTERS then
			wait(1)
			endGame("win")
			return
		end
		wait(1)
		newMonster()
		turn = "player"
		return
	end

	wait(0.7)
	local mdmg = math.random(10 + monstersDefeated, 18 + monstersDefeated)
	local damageTaken = mdmg
	if currentArmor then
		damageTaken = math.floor(mdmg * (1 - currentArmor.reduction))
	end
	playerHP -= damageTaken
	infoLabel.Text = "Monster hit you for "..damageTaken.."!"
	updateHUD()

	if playerHP <= 0 then
		endGame("lose")
	else
		turn = "player"
	end
end)

usePotionBtn.MouseButton1Click:Connect(function()
	if turn ~= "player" or potions <= 0 then return end
	local healed = math.min(60, MAX_HP - playerHP)
	potions -= 1
	playerHP += healed
	infoLabel.Text = "Used a potion! Restored "..healed.." HP. ("..potions.." left)"
	updateHUD()
end)


shopBtn.MouseButton1Click:Connect(function()
	shopFrame.Visible = not shopFrame.Visible
end)

backShopBtn.MouseButton1Click:Connect(function()
	shopFrame.Visible = false
end)

for i,btn in ipairs(shopButtons) do
	btn.MouseButton1Click:Connect(function()
		local item = shopItems[i]
		if coins < item.cost then
			infoLabel.Text = "Not enough coins!"
			return
		end
		coins -= item.cost
		if item.type == "weapon" then
			weapon = item
			infoLabel.Text = "Equipped "..item.name.."!"
		elseif item.type == "potion" then
			potions += 1
			infoLabel.Text = "Bought a potion! You now have "..potions.."."
		elseif item.type == "armor" then
			currentArmor = item
			infoLabel.Text = "Equipped "..item.name.."! Damage reduced by "..(item.reduction*100).."%"
		end
		updateHUD()
	end)
end


newMonster()
updateHUD()