local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local LocalPlayer = Players.LocalPlayer
local Mouse = LocalPlayer:GetMouse()
local Camera = workspace.CurrentCamera

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Managers = ReplicatedStorage.Common.Managers
local WeaponManager = require(Managers.WeaponManager)

local fov = 150

local fovcircle = Drawing.new("Circle")
fovcircle.Thickness = 0.1
fovcircle.Color = Color3.fromRGB(255, 255, 255)
fovcircle.Filled = false
fovcircle.Transparency = 1
fovcircle.Visible = true
fovcircle.Radius = fov

RunService.RenderStepped:Connect(function()
    local viewportSize = Camera.ViewportSize
    fovcircle.Position = Vector2.new(viewportSize.X / 2, viewportSize.Y / 2)
end)

local function isVisible(targetPart)
    local origin = Camera.CFrame.Position
    local direction = (targetPart.Position - origin).Unit * (targetPart.Position - origin).Magnitude
    local raycastParams = RaycastParams.new()
    raycastParams.FilterDescendantsInstances = {LocalPlayer.Character, Camera}
    raycastParams.FilterType = Enum.RaycastFilterType.Exclude
    local result = workspace:Raycast(origin, direction, raycastParams)
    if result and (result.Instance:IsDescendantOf(targetPart.Parent)) then
        return true
    end
    return false
end

local function getClosestTargetHead()
    local closestDist = fov
    local target = nil
    local viewportCenter = Vector2.new(Camera.ViewportSize.X / 2, Camera.ViewportSize.Y / 2)
    for _, obj in pairs(workspace:GetChildren()) do
        if obj:IsA("Model") and obj ~= LocalPlayer.Character and obj.Name ~= "Map" and obj.Name ~= "Viewmodel" then
            local head = obj:FindFirstChild("Head")
            local hum = obj:FindFirstChildOfClass("Humanoid")
            if head and hum and hum.Health > 0 then
                local screenPos, onScreen = Camera:WorldToViewportPoint(head.Position)
                if onScreen then
                    local dist = (viewportCenter - Vector2.new(screenPos.X, screenPos.Y)).Magnitude
                    if dist < closestDist then
                        if isVisible(head) then
                            closestDist = dist
                            target = head
                        end
                    end
                end
            end
        end
    end
    return target
end

local oldCast
oldCast = hookfunction(WeaponManager.cast, function(origin, direction, target, distance, ignoreList, callbacks, isReplication, isLocal, someBool, color)
    local targetHead = getClosestTargetHead()
    
    if targetHead then
        local newDirection = (targetHead.Position - origin).Unit * distance
        return oldCast(origin, newDirection, target, distance, ignoreList, callbacks, isReplication, isLocal, someBool, color)
    end
    
    return oldCast(origin, direction, target, distance, ignoreList, callbacks, isReplication, isLocal, someBool, color)
end)