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

local LocalPlayer = Players.LocalPlayer
local Camera = workspace.CurrentCamera

-- ===== RAYFIELD =====
local Rayfield = loadstring(game:HttpGet('https://sirius.menu/rayfield'))()

local Window = Rayfield:CreateWindow({
    Name = "Player Utilities",
    LoadingTitle = "Player Utilities",
    LoadingSubtitle = "Loading...",
    ConfigurationSaving = { Enabled = false },
    Discord = { Enabled = false },
    KeySystem = false,
})

local LockTab = Window:CreateTab("Lock On", nil)
local ESPTab = Window:CreateTab("ESP", nil)

-- ===== STATE =====
local lockEnabled = false
local lockRange = 150
local lockedTarget = nil
local lockLoop = nil

local espEnabled = false
local espData = {}

-- ===== UTILITY =====
local function isVisible(targetHead)
    if not targetHead then return false end

    local origin = Camera.CFrame.Position
    local direction = targetHead.Position - origin

    local rayParams = RaycastParams.new()
    rayParams.FilterType = Enum.RaycastFilterType.Exclude

    local excludeList = {}
    if LocalPlayer.Character then
        table.insert(excludeList, LocalPlayer.Character)
    end
    if targetHead.Parent then
        table.insert(excludeList, targetHead.Parent)
    end
    rayParams.FilterDescendantsInstances = excludeList

    local result = workspace:Raycast(origin, direction, rayParams)
    if not result then return true end

    local hitDist = (result.Position - origin).Magnitude
    local headDist = direction.Magnitude
    return hitDist >= headDist - 1
end

local function getHealth(player)
    local char = player.Character
    if not char then return 0, 100 end
    local h = char:FindFirstChildOfClass("Humanoid")
    if not h then return 0, 100 end
    return h.Health, h.MaxHealth
end

-- ===== ESP =====
local function buildESP(player)
    if player == LocalPlayer then return end
    if espData[player] then return end

    local function tryAttach()
        local character = player.Character
        if not character then return end

        local highlight = Instance.new("Highlight")
        highlight.FillColor = Color3.fromRGB(255, 50, 50)
        highlight.OutlineColor = Color3.fromRGB(255, 255, 255)
        highlight.FillTransparency = 0.4
        highlight.OutlineTransparency = 0
        highlight.DepthMode = Enum.HighlightDepthMode.AlwaysOnTop -- shows through walls
        highlight.Parent = character

        local head = character:FindFirstChild("Head")
        local billboard, hpBar, hpFill, nameLbl

        if head then
            billboard = Instance.new("BillboardGui")
            billboard.Name = "ESP_Billboard"
            billboard.Size = UDim2.new(0, 120, 0, 40)
            billboard.StudsOffset = Vector3.new(0, 2.5, 0)
            billboard.AlwaysOnTop = true
            billboard.Parent = head

            nameLbl = Instance.new("TextLabel")
            nameLbl.Size = UDim2.new(1, 0, 0.5, 0)
            nameLbl.BackgroundTransparency = 1
            nameLbl.Text = player.Name
            nameLbl.TextColor3 = Color3.fromRGB(255, 255, 255)
            nameLbl.TextStrokeTransparency = 0
            nameLbl.Font = Enum.Font.GothamBold
            nameLbl.TextScaled = true
            nameLbl.Parent = billboard

            -- HP bar background
            hpBar = Instance.new("Frame")
            hpBar.Size = UDim2.new(1, 0, 0.3, 0)
            hpBar.Position = UDim2.new(0, 0, 0.65, 0)
            hpBar.BackgroundColor3 = Color3.fromRGB(50, 50, 50)
            hpBar.BorderSizePixel = 0
            hpBar.Parent = billboard

            -- HP bar fill
            hpFill = Instance.new("Frame")
            hpFill.Size = UDim2.new(1, 0, 1, 0)
            hpFill.BackgroundColor3 = Color3.fromRGB(80, 255, 80)
            hpFill.BorderSizePixel = 0
            hpFill.Parent = hpBar
        end

        espData[player] = {
            highlight = highlight,
            billboard = billboard,
            hpFill = hpFill,
            nameLbl = nameLbl,
        }
    end

    tryAttach()

    player.CharacterAdded:Connect(function()
        task.wait(0.5)
        -- clean old
        if espData[player] then
            if espData[player].highlight then espData[player].highlight:Destroy() end
            if espData[player].billboard then espData[player].billboard:Destroy() end
            espData[player] = nil
        end
        tryAttach()
    end)
end

local function removeESP(player)
    local data = espData[player]
    if data then
        if data.highlight then data.highlight:Destroy() end
        if data.billboard then data.billboard:Destroy() end
        espData[player] = nil
    end
end

local function refreshAllESP()
    for _, player in ipairs(Players:GetPlayers()) do
        if espEnabled then
            buildESP(player)
        else
            removeESP(player)
        end
    end
end

-- update hp bars every frame
RunService.RenderStepped:Connect(function()
    if not espEnabled then return end
    for player, data in pairs(espData) do
        if data.hpFill then
            local hp, maxHp = getHealth(player)
            local pct = math.clamp(hp / maxHp, 0, 1)
            data.hpFill.Size = UDim2.new(pct, 0, 1, 0)
            -- green -> yellow -> red based on hp
            data.hpFill.BackgroundColor3 = Color3.fromRGB(
                math.floor(255 * (1 - pct)),
                math.floor(255 * pct),
                0
            )
        end
        -- highlight locked target in different color
        if data.highlight then
            if lockedTarget == player then
                data.highlight.FillColor = Color3.fromRGB(255, 200, 0)
                data.highlight.OutlineColor = Color3.fromRGB(255, 255, 0)
            else
                data.highlight.FillColor = Color3.fromRGB(255, 50, 50)
                data.highlight.OutlineColor = Color3.fromRGB(255, 255, 255)
            end
        end
    end
end)

Players.PlayerAdded:Connect(function(player)
    if espEnabled then
        task.wait(0.5)
        buildESP(player)
    end
end)

Players.PlayerRemoving:Connect(function(player)
    removeESP(player)
end)

-- ===== LOCK ON =====
local function findBestTarget()
    local bestPlayer = nil
    local bestScore = math.huge
    local screenCenter = Vector2.new(Camera.ViewportSize.X / 2, Camera.ViewportSize.Y / 2)

    for _, player in ipairs(Players:GetPlayers()) do
        if player == LocalPlayer then continue end

        local character = player.Character
        if not character then continue end

        local head = character:FindFirstChild("Head")
        if not head then continue end

        local humanoid = character:FindFirstChildOfClass("Humanoid")
        if not humanoid or humanoid.Health <= 0 then continue end

        local worldDist = (head.Position - Camera.CFrame.Position).Magnitude
        if worldDist > lockRange then continue end

        local screenPos, onScreen = Camera:WorldToScreenPoint(head.Position)
        if not onScreen then continue end

        if not isVisible(head) then continue end

        -- score = screen distance from center, weighted slightly by world distance
        local screenDist = (Vector2.new(screenPos.X, screenPos.Y) - screenCenter).Magnitude
        local score = screenDist + (worldDist * 0.1)

        if score < bestScore then
            bestScore = score
            bestPlayer = player
        end
    end

    return bestPlayer
end

local function startLock()
    if lockLoop then lockLoop:Disconnect() end

    lockLoop = RunService.RenderStepped:Connect(function()
        -- validate current target
        if lockedTarget then
            local char = lockedTarget.Character
            local head = char and char:FindFirstChild("Head")
            local humanoid = char and char:FindFirstChildOfClass("Humanoid")
            local worldDist = head and (head.Position - Camera.CFrame.Position).Magnitude or math.huge

            if not head
                or not humanoid
                or humanoid.Health <= 0
                or worldDist > lockRange
                or not isVisible(head) then
                lockedTarget = nil
            end
        end

        -- find new target if none
        if not lockedTarget then
            lockedTarget = findBestTarget()
        end

        -- lock camera to head
        if lockedTarget then
            local char = lockedTarget.Character
            local head = char and char:FindFirstChild("Head")
            if head then
                Camera.CFrame = CFrame.new(Camera.CFrame.Position, head.Position)
            end
        end
    end)
end

local function stopLock()
    if lockLoop then lockLoop:Disconnect(); lockLoop = nil end
    lockedTarget = nil
end

-- ===== RAYFIELD: LOCK ON TAB =====
LockTab:CreateToggle({
    Name = "Lock On (T to toggle)",
    CurrentValue = false,
    Flag = "LockToggle",
    Callback = function(value)
        lockEnabled = value
        if value then startLock() else stopLock() end
    end,
})

LockTab:CreateSlider({
    Name = "Lock Range",
    Range = {20, 600},
    Increment = 10,
    Suffix = " studs",
    CurrentValue = 150,
    Flag = "LockRange",
    Callback = function(value)
        lockRange = value
    end,
})

-- ===== RAYFIELD: ESP TAB =====
ESPTab:CreateToggle({
    Name = "Player Highlight (through walls)",
    CurrentValue = false,
    Flag = "ESPToggle",
    Callback = function(value)
        espEnabled = value
        refreshAllESP()
    end,
})

-- ===== PC KEYBIND =====
UserInputService.InputBegan:Connect(function(input, gameProcessed)
    if gameProcessed then return end
    if input.KeyCode == Enum.KeyCode.T then
        lockEnabled = not lockEnabled
        if lockEnabled then startLock() else stopLock() end
    end
end)

Rayfield:LoadConfiguration()