local player = game.Players.LocalPlayer
local camera = workspace.CurrentCamera
local runService = game:GetService("RunService")
local userInput = game:GetService("UserInputService")
local players = game:GetService("Players")

-- SETTINGS
local aimAssistRange = 1000         -- Max distance to aim
local toggleKey = Enum.KeyCode.E   -- Key to toggle aim assist

-- VARIABLES
local aimAssistEnabled = true
local priorityTarget = nil

-- GUI Setup for FOV circle (showing FOV even if 360° for consistency)
local playerGui = player:WaitForChild("PlayerGui")

local fovCircle = Instance.new("Frame")
fovCircle.Name = "AimAssistFOV"
fovCircle.Size = UDim2.new(0, 200, 0, 200)
fovCircle.Position = UDim2.new(0.5, -100, 0.5, -100)
fovCircle.BackgroundColor3 = Color3.new(1, 0, 0) -- Red when no target locked
fovCircle.BackgroundTransparency = 0.7
fovCircle.BorderSizePixel = 0
fovCircle.Visible = true
fovCircle.AnchorPoint = Vector2.new(0.5, 0.5)
fovCircle.Parent = playerGui

local uiCorner = Instance.new("UICorner")
uiCorner.CornerRadius = UDim.new(1, 0)
uiCorner.Parent = fovCircle

-- Toggle aim assist on/off
userInput.InputBegan:Connect(function(input, gameProcessed)
	if gameProcessed then return end
	if input.KeyCode == toggleKey then
		aimAssistEnabled = not aimAssistEnabled
		fovCircle.Visible = aimAssistEnabled
		print("Aim Assist: " .. (aimAssistEnabled and "ON" or "OFF"))
	end
end)

-- Find nearest visible enemy anywhere around player (360°) with line-of-sight
local function getNearestEnemy()
	local closestEnemy = nil
	local shortestDistance = aimAssistRange
	local camPos = camera.CFrame.Position

	for _, character in pairs(workspace:GetChildren()) do
		if character:FindFirstChild("Humanoid") 
		and character:FindFirstChild("HumanoidRootPart") 
		and character ~= player.Character then

			local enemyPlayer = players:GetPlayerFromCharacter(character)

			if enemyPlayer and enemyPlayer.Team ~= player.Team then
				local enemyPos = character.HumanoidRootPart.Position
				local distance = (enemyPos - camPos).Magnitude

				if distance < shortestDistance then
					-- Raycast to check line of sight (ignore player character)
					local raycastParams = RaycastParams.new()
					raycastParams.FilterDescendantsInstances = {player.Character}
					raycastParams.FilterType = Enum.RaycastFilterType.Blacklist

					local raycastResult = workspace:Raycast(camPos, (enemyPos - camPos).Unit * distance, raycastParams)

					if raycastResult and raycastResult.Instance:IsDescendantOf(character) then
						closestEnemy = character
						shortestDistance = distance
					end
				end
			end
		end
	end

	return closestEnemy
end

-- Listen for damage to player, set priorityTarget accordingly
local function onHealthChanged()
	local humanoid = player.Character and player.Character:FindFirstChildOfClass("Humanoid")
	if not humanoid then return end

	local lastHealth = humanoid.Health

	humanoid.HealthChanged:Connect(function(newHealth)
		if newHealth < lastHealth then
			-- Damage happened! Find who caused it
			-- We have no direct info on attacker here, so as a common approach,
			-- check recent attackers from workspace or use a tag system.
			-- For now, we'll try a basic approach:
			
			-- Find enemies within 50 studs who have a tool equipped (likely attacker)
			local camPos = camera.CFrame.Position
			for _, character in pairs(workspace:GetChildren()) do
				if character:FindFirstChild("Humanoid") and character:FindFirstChild("HumanoidRootPart") and character ~= player.Character then
					local enemyPlayer = players:GetPlayerFromCharacter(character)
					if enemyPlayer and enemyPlayer.Team ~= player.Team then
						local dist = (character.HumanoidRootPart.Position - camPos).Magnitude
						if dist <= 50 then
							-- Assume this enemy damaged player
							priorityTarget = character
							break
						end
					end
				end
			end
		end
		lastHealth = newHealth
	end)
end

-- Call it once on start and whenever character respawns
local function setupCharacterListener()
	if player.Character then
		onHealthChanged()
	end
	player.CharacterAdded:Connect(function()
		onHealthChanged()
	end)
end

setupCharacterListener()

-- Instantly snap camera to priority target if exists and alive, else snap to nearest enemy
local function adjustAim()
	if not aimAssistEnabled then return end

	-- Clear priority target if dead or nil
	if priorityTarget then
		local humanoid = priorityTarget:FindFirstChildOfClass("Humanoid")
		if not humanoid or humanoid.Health <= 0 then
			priorityTarget = nil
		end
	end

	local target = priorityTarget or getNearestEnemy()

	if target then
		local enemyPos = target.HumanoidRootPart.Position
		local camPos = camera.CFrame.Position
		camera.CFrame = CFrame.new(camPos, enemyPos)
		fovCircle.BackgroundColor3 = Color3.new(0, 1, 0) -- Green when locked
	else
		fovCircle.BackgroundColor3 = Color3.new(1, 0, 0) -- Red when no target
	end
end

runService.RenderStepped:Connect(adjustAim)