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

local LocalPlayer = Players.LocalPlayer
local ESP_ENABLED = true          -- starts on, press Insert to toggle
local MAX_DISTANCE = 350
local ESP_BOXES = {}

local function GetCharacterSize(char)
    if not char then return Vector3.new(4, 6, 4) end
    local humanoid = char:FindFirstChildOfClass("Humanoid")
    if not humanoid then return Vector3.new(4, 6, 4) end
    
    local base = Vector3.new(4, 5.8, 4) -- better R15 average
    if humanoid.HipHeight > 2 then
        base = base + Vector3.new(0, humanoid.HipHeight - 2, 0)
    end
    return base
end

local function CreateOrUpdateBox(player)
    if player == LocalPlayer then return end
    
    local box = ESP_BOXES[player]
    if not box then
        box = Instance.new("BoxHandleAdornment")
        box.Name = "ESPBox"
        box.Transparency = 0.65
        box.AlwaysOnTop = true
        box.ZIndex = 10
        box.Visible = false
        ESP_BOXES[player] = box
    end
    
    -- We'll re-parent & resize when character spawns
end

local function OnCharacterAdded(char, player, box)
    if not char or not box then return end
    
    local root = char:WaitForChild("HumanoidRootPart", 8)
    if not root then return end
    
    box.Adornee = root
    box.Size = GetCharacterSize(char)
    box.Parent = char  -- parent to character (less detectable than CoreGui in many games)
end

local function SetupPlayer(player)
    if player == LocalPlayer then return end
    
    CreateOrUpdateBox(player)
    local box = ESP_BOXES[player]
    
    local function handleChar(char)
        OnCharacterAdded(char, player, box)
    end
    
    if player.Character then
        handleChar(player.Character)
    end
    
    player.CharacterAdded:Connect(handleChar)
    
    -- Clean up on leaving
    player.AncestryChanged:Connect(function()
        if not player:IsDescendantOf(game) then
            if box then box:Destroy() end
            ESP_BOXES[player] = nil
        end
    end)
end

-- Initialize existing players
for _, plr in Players:GetPlayers() do
    SetupPlayer(plr)
end

Players.PlayerAdded:Connect(SetupPlayer)

-- Main update loop
local myRootCache = nil
RunService.RenderStepped:Connect(function()
    if not ESP_ENABLED then
        for _, box in ESP_BOXES do
            box.Visible = false
        end
        return
    end
    
    local myChar = LocalPlayer.Character
    if not myChar then
        myRootCache = nil
        return
    end
    
    myRootCache = myChar:FindFirstChild("HumanoidRootPart") or myRootCache
    
    for player, box in ESP_BOXES do
        if not player or not player.Character or player.Team == LocalPlayer.Team then
            box.Visible = false
            continue
        end
        
        local root = player.Character:FindFirstChild("HumanoidRootPart")
        if not root or not myRootCache then
            box.Visible = false
            continue
        end
        
        local dist = (root.Position - myRootCache.Position).Magnitude
        
        if dist > MAX_DISTANCE then
            box.Visible = false
            continue
        end
        
        -- Distance-based color + slight transparency fade
        local t = math.clamp(dist / MAX_DISTANCE, 0, 1)
        local r = 1
        local g = 1 - t
        local b = 0
        
        if dist < 60 then
            r, g, b = 1, 0, 0          -- close = red
        elseif dist < 140 then
            r, g, b = 1, 0.65, 0       -- mid = orange
        else
            r, g, b = 1, 1, 0          -- far = yellow
        end
        
        box.Color3 = Color3.new(r, g, b)
        box.Transparency = 0.4 + (t * 0.4)   -- 0.4 → 0.8 fade out
        
        box.Visible = true
    end
end)

-- Toggle with Insert key
UserInputService.InputBegan:Connect(function(input, gpe)
    if gpe then return end
    if input.KeyCode == Enum.KeyCode.Insert then
        ESP_ENABLED = not ESP_ENABLED
        print("ESP " .. (ESP_ENABLED and "ENABLED" or "DISABLED"))
    end
end)