-- Sprint universal móvil y PC con botón a la derecha pero más arriba para no tapar salto
-- Animaciones cool para botón y barra

-- CONFIG
local sprintKey = Enum.KeyCode.LeftShift
local sprintSpeed = 30
local walkSpeed = 16
local maxStamina = 100
local staminaDrain = 20
local staminaRegen = 10

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

-- VARIABLES
local player = Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")

local stamina = maxStamina
local isSprinting = false
local staminaEmpty = false

-- GUI
local screenGui = Instance.new("ScreenGui")
screenGui.Name = "SprintGUI"
screenGui.Parent = game.CoreGui
screenGui.ResetOnSpawn = false

-- Barra de stamina (abajo centrada)
local staminaBarBG = Instance.new("Frame")
staminaBarBG.Size = UDim2.new(0, 320, 0, 25)
staminaBarBG.Position = UDim2.new(0.5, -160, 0.9, 0)
staminaBarBG.BackgroundColor3 = Color3.fromRGB(30, 30, 30)
staminaBarBG.BorderSizePixel = 0
staminaBarBG.AnchorPoint = Vector2.new(0, 0)
staminaBarBG.Parent = screenGui

local border = Instance.new("UIStroke")
border.Color = Color3.fromRGB(200, 200, 200)
border.Thickness = 1.5
border.Parent = staminaBarBG

local bgCorner = Instance.new("UICorner")
bgCorner.CornerRadius = UDim.new(0, 12)
bgCorner.Parent = staminaBarBG

local staminaBar = Instance.new("Frame")
staminaBar.Size = UDim2.new(1, 0, 1, 0)
staminaBar.BackgroundColor3 = Color3.fromRGB(50, 200, 50)
staminaBar.BorderSizePixel = 0
staminaBar.AnchorPoint = Vector2.new(0, 0)
staminaBar.Position = UDim2.new(0, 0, 0, 0)
staminaBar.Parent = staminaBarBG

local staminaCorner = Instance.new("UICorner")
staminaCorner.CornerRadius = UDim.new(0, 12)
staminaCorner.Parent = staminaBar

local staminaLabel = Instance.new("TextLabel")
staminaLabel.Size = UDim2.new(1, 0, 0, 20)
staminaLabel.Position = UDim2.new(0.5, 0, 0, -22)
staminaLabel.BackgroundTransparency = 1
staminaLabel.Text = "Stamina"
staminaLabel.Font = Enum.Font.GothamBold
staminaLabel.TextSize = 18
staminaLabel.TextColor3 = Color3.fromRGB(220, 220, 220)
staminaLabel.AnchorPoint = Vector2.new(0.5, 0)
staminaLabel.Parent = staminaBarBG

-- Botón sprint móvil (ancla arriba-izquierda para controlar posición solo con offset)
local mobileButton = Instance.new("TextButton")
mobileButton.Size = UDim2.new(0, 130, 0, 60)
mobileButton.AnchorPoint = Vector2.new(0, 0)
mobileButton.Position = UDim2.new(1, -10, 1, -220) -- pegado a la derecha, más arriba para no tapar salto
mobileButton.BackgroundColor3 = Color3.fromRGB(255, 140, 0)
mobileButton.TextColor3 = Color3.fromRGB(255, 255, 255)
mobileButton.Font = Enum.Font.GothamSemibold
mobileButton.TextSize = 24
mobileButton.Text = "Sprint"
mobileButton.AutoButtonColor = true
mobileButton.Parent = screenGui

local buttonCorner = Instance.new("UICorner")
buttonCorner.CornerRadius = UDim.new(0, 18)
buttonCorner.Parent = mobileButton

local buttonShadow = Instance.new("ImageLabel")
buttonShadow.Name = "Shadow"
buttonShadow.BackgroundTransparency = 1
buttonShadow.Image = "rbxassetid://6014261992"
buttonShadow.ImageColor3 = Color3.new(0,0,0)
buttonShadow.ImageTransparency = 0.7
buttonShadow.Size = UDim2.new(1.3, 0, 1.3, 0)
buttonShadow.Position = UDim2.new(-0.15, 0, -0.15, 0)
buttonShadow.ZIndex = 0
buttonShadow.Parent = mobileButton

-- Animación pulso botón (crece y cambia color)
local pulseTweenInfo = TweenInfo.new(0.6, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut, -1, true)
local pulseTweenSize = TweenService:Create(mobileButton, pulseTweenInfo, {Size = UDim2.new(0, 140, 0, 65)})
local pulseTweenColor = TweenService:Create(mobileButton, pulseTweenInfo, {BackgroundColor3 = Color3.fromRGB(255, 180, 50)})

-- FUNCIONES
local function startSprint()
    if stamina > 0 and not staminaEmpty then
        isSprinting = true
        humanoid.WalkSpeed = sprintSpeed
        pulseTweenSize:Play()
        pulseTweenColor:Play()
    end
end

local function stopSprint()
    isSprinting = false
    humanoid.WalkSpeed = walkSpeed
    pulseTweenSize:Cancel()
    pulseTweenColor:Cancel()
    mobileButton.Size = UDim2.new(0, 130, 0, 60)
    mobileButton.BackgroundColor3 = Color3.fromRGB(255, 140, 0)
end

local function updateButtonState()
    if staminaEmpty then
        mobileButton.AutoButtonColor = false
        mobileButton.BackgroundColor3 = Color3.fromRGB(120, 120, 120)
        mobileButton.TextColor3 = Color3.fromRGB(200, 200, 200)
        mobileButton.Active = false
        stopSprint()
    else
        mobileButton.AutoButtonColor = true
        mobileButton.BackgroundColor3 = Color3.fromRGB(255, 140, 0)
        mobileButton.TextColor3 = Color3.fromRGB(255, 255, 255)
        mobileButton.Active = true
    end
end

-- ACTUALIZACIÓN DE BARRA Y COLOR
RunService.RenderStepped:Connect(function(dt)
    if isSprinting and stamina > 0 then
        stamina = math.max(stamina - staminaDrain * dt, 0)
        if stamina <= 0 then
            staminaEmpty = true
            stopSprint()
        end
    elseif not isSprinting and stamina < maxStamina then
        stamina = math.min(stamina + staminaRegen * dt, maxStamina)
        if stamina > 0 then
            staminaEmpty = false
        end
    end

    -- Color barra verde a rojo
    local t = stamina / maxStamina
    local r = 255 * (1 - t)
    local g = 200 * t + 50
    staminaBar.BackgroundColor3 = Color3.fromRGB(r, g, 0)

    -- Animación suavizada de tamaño barra
    staminaBar:TweenSize(UDim2.new(t, 0, 1, 0), Enum.EasingDirection.Out, Enum.EasingStyle.Sine, 0.15, true)

    updateButtonState()
end)

-- INPUTS
UserInputService.InputBegan:Connect(function(input, gp)
    if not gp and input.KeyCode == sprintKey then
        startSprint()
    end
end)

UserInputService.InputEnded:Connect(function(input)
    if input.KeyCode == sprintKey then
        stopSprint()
    end
end)

mobileButton.MouseButton1Down:Connect(startSprint)
mobileButton.MouseButton1Up:Connect(stopSprint)

-- RESET AL REAPARECER
player.CharacterAdded:Connect(function(newChar)
    character = newChar
    humanoid = character:WaitForChild("Humanoid")
    stopSprint()
    stamina = maxStamina
    staminaEmpty = false
end)