local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local UserInputService = game:GetService("UserInputService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local LocalPlayer = Players.LocalPlayer
local Camera = workspace.CurrentCamera

workspace:GetPropertyChangedSignal("CurrentCamera"):Connect(function()
	Camera = workspace.CurrentCamera
end)

local Settings = {
	SilentAimEnabled = true,
	HeadChance = 10,
	HitChance = 100,
	FOVRadius = 180,
}

local NonHeadParts = {"UpperTorso", "LowerTorso", "HumanoidRootPart", "RightUpperArm", "LeftUpperArm", "RightUpperLeg", "LeftUpperLeg"}

local FOVCircle = Drawing.new("Circle")
FOVCircle.Visible = true
FOVCircle.Thickness = 1
FOVCircle.Radius = Settings.FOVRadius
FOVCircle.Transparency = 0.7
FOVCircle.Color = Color3.fromRGB(255, 255, 255)
FOVCircle.Filled = false

local TargetDot = Drawing.new("Circle")
TargetDot.Visible = false
TargetDot.Thickness = 1
TargetDot.Radius = 4
TargetDot.Color = Color3.fromRGB(255, 0, 0)
TargetDot.Filled = true
TargetDot.Transparency = 1

local EntityService = require(ReplicatedStorage.Remote.EntityService)
local CameraController = require(ReplicatedStorage.Client.CameraController)
local ClientShootableComponent = require(ReplicatedStorage.Client.CombatController.ClientComponent.ClientShootableComponent)

local function GetEntityCharacter(Entity)
	local Inst = Entity.Instance
	if not Inst then
		return nil
	end
	if Inst:IsA("Player") then
		return Inst.Character
	end
	if Inst:IsA("Model") then
		return Inst
	end
	return nil
end

local function FindEntityPosition(EntityModel)
	local HRP = EntityModel:FindFirstChild("HumanoidRootPart")
	if HRP and HRP:IsA("BasePart") then
		return HRP.Position
	end
	local Head = EntityModel:FindFirstChild("Head")
	if Head and Head:IsA("BasePart") then
		return Head.Position
	end
	local Collider = EntityModel:FindFirstChild("Collider")
	if Collider then
		for _, Part in Collider:GetChildren() do
			if Part:IsA("BasePart") then
				return Part.Position
			end
		end
	end
	local Humanoid = EntityModel:FindFirstChildOfClass("Humanoid")
	if Humanoid and Humanoid.RootPart then
		return Humanoid.RootPart.Position
	end
	return nil
end

local function FindTargetPart(EntityModel, WantHead)
	if WantHead then
		local Head = EntityModel:FindFirstChild("Head")
		if not Head then
			Head = EntityModel:FindFirstChild("Head", true)
		end
		if Head and Head:IsA("BasePart") then
			return Head, true
		end
	end

	local Collider = EntityModel:FindFirstChild("Collider")
	if Collider then
		local Parts = {}
		for _, Part in Collider:GetChildren() do
			if Part:IsA("BasePart") then
				table.insert(Parts, Part)
			end
		end
		if #Parts > 0 then
			return Parts[math.random(1, #Parts)], false
		end
	end

	local Shuffled = table.clone(NonHeadParts)
	for I = #Shuffled, 2, -1 do
		local J = math.random(1, I)
		Shuffled[I], Shuffled[J] = Shuffled[J], Shuffled[I]
	end
	for _, PartName in Shuffled do
		local Part = EntityModel:FindFirstChild(PartName)
		if not Part then
			Part = EntityModel:FindFirstChild(PartName, true)
		end
		if Part and Part:IsA("BasePart") then
			return Part, false
		end
	end

	local HRP = EntityModel:FindFirstChild("HumanoidRootPart")
	if HRP and HRP:IsA("BasePart") then
		return HRP, false
	end
	return nil, false
end

local function IsInFOV(WorldPosition)
	if not Camera then
		return false, math.huge
	end
	local ScreenPos, OnScreen = Camera:WorldToViewportPoint(WorldPosition)
	if not OnScreen then
		return false, math.huge
	end
	local MousePos = UserInputService:GetMouseLocation()
	local Distance = (Vector2.new(ScreenPos.X, ScreenPos.Y) - MousePos).Magnitude
	return Distance <= Settings.FOVRadius, Distance
end

local function GetAllEnemyEntities()
	local Enemies = {}
	local LocalEntity = EntityService.GetLocalEntity()
	if not LocalEntity or not LocalEntity.World then
		return Enemies
	end

	local WorldEntities = LocalEntity.World.EntitiesByTeam
	if not WorldEntities then
		return Enemies
	end

	for _, TeamDict in pairs(WorldEntities) do
		local Items = TeamDict._items or TeamDict
		for _, Entity in pairs(Items) do
			if not EntityService.IsLocalEntity(Entity) and Entity:IsAlive() then
				local Character = GetEntityCharacter(Entity)
				if Character then
					local Humanoid = Character:FindFirstChildOfClass("Humanoid")
					if Humanoid and Humanoid.Health > 0 then
						table.insert(Enemies, Character)
					end
				end
			end
		end
	end

	return Enemies
end

local function GetClosestEnemy()
	local Enemies = GetAllEnemyEntities()
	local ClosestModel = nil
	local ClosestDistance = math.huge
	for _, Model in Enemies do
		local Position = FindEntityPosition(Model)
		if Position then
			local InFOV, Distance = IsInFOV(Position)
			if InFOV and Distance < ClosestDistance then
				ClosestModel = Model
				ClosestDistance = Distance
			end
		end
	end
	return ClosestModel
end

local SilentTarget = nil

RunService.RenderStepped:Connect(function()
	FOVCircle.Position = UserInputService:GetMouseLocation()
	FOVCircle.Radius = Settings.FOVRadius
	FOVCircle.Visible = Settings.SilentAimEnabled

	if Settings.SilentAimEnabled then
		local TargetModel = GetClosestEnemy()
		if TargetModel then
			local Position = FindEntityPosition(TargetModel)
			if Position then
				local ScreenPos, OnScreen = Camera:WorldToViewportPoint(Position)
				if OnScreen then
					TargetDot.Position = Vector2.new(ScreenPos.X, ScreenPos.Y)
					TargetDot.Visible = true
				else
					TargetDot.Visible = false
				end
			else
				TargetDot.Visible = false
			end
		else
			TargetDot.Visible = false
		end
	else
		TargetDot.Visible = false
	end
end)

local OldGetCombatOrigin
OldGetCombatOrigin = hookfunction(CameraController.GetCombatOrigin, newcclosure(function()
	local OrigCFrame, DetectAt = OldGetCombatOrigin()
	if SilentTarget then
		local NewCFrame = CFrame.lookAt(OrigCFrame.Position, SilentTarget.Position)
		return NewCFrame, DetectAt
	end
	return OrigCFrame, DetectAt
end))

local OldGetTargeting
OldGetTargeting = hookfunction(CameraController.GetTargeting, newcclosure(function()
	if SilentTarget then
		return SilentTarget.Position, SilentTarget.Part
	end
	return OldGetTargeting()
end))

local OldLocalShoot
OldLocalShoot = hookfunction(ClientShootableComponent.LocalShoot, newcclosure(function(Self, ...)
	if Settings.SilentAimEnabled and math.random(1, 100) <= Settings.HitChance then
		local TargetModel = GetClosestEnemy()
		if TargetModel then
			local WantHead = math.random(1, 100) <= Settings.HeadChance
			local TargetPart, IsHead = FindTargetPart(TargetModel, WantHead)
			if TargetPart then
				SilentTarget = {
					Part = TargetPart,
					Position = TargetPart.Position,
					IsHead = IsHead,
				}
			end
		end
	end
	local Result = OldLocalShoot(Self, ...)
	SilentTarget = nil
	return Result
end))