--by pavetr.top/ds
if CLIENT then
    -- Camera configuration
    local CAMERA_FORWARD = -5 -- Distance from the face
    local CAMERA_UP = 2.40    -- Camera height
    local CAMERA_RIGHT = 0.14 -- Side offset
    local SHOW_DEBUG = false

    -- Create ConVar for settings
    local cv_laser = CreateClientConVar("cl_custom_laser", "0", true, false, "Enable/Disable laser sight")
    local cv_disable_crosshair = CreateClientConVar("cl_disable_crosshair", "1", true, false, "Disable default crosshair")
    local cv_dynamic_crosshair = CreateClientConVar("cl_dynamic_crosshair", "1", true, false, "Enable dynamic crosshair")

    -- Add settings menu
    hook.Add("PopulateToolMenu", "CustomLaserSettings", function()
        spawnmenu.AddToolMenuOption("Utilities", "User", "CustomLaserSettings", "First Person Settings", "", "", function(panel)
            panel:ClearControls()
            panel:CheckBox("Enable laser sight", "cl_custom_laser")
            panel:CheckBox("Disable default crosshair", "cl_disable_crosshair")
            panel:CheckBox("Enable dynamic crosshair", "cl_dynamic_crosshair")
        end)
    end)

    -- Hook to always draw the player model in first-person
    hook.Add("ShouldDrawLocalPlayer", "CustomFP_DrawBody", function(ply)
        return true
    end)


    -- Camera Position Fix
    hook.Add("CalcView", "CustomFP_PreciseCamera", function(ply, pos, ang, fov)
        if not IsValid(ply) or not ply:Alive() then return end

        local headPos = ply:GetShootPos() + Vector(0,0,5)
        local headAng = ply:EyeAngles()

        -- Get actual head bone position
        local boneIndex = ply:LookupBone("ValveBiped.Bip01_Head1")
        if boneIndex then
            local bonePos, boneAng = ply:GetBonePosition(boneIndex)
            if bonePos then
                headPos = bonePos
                boneAng:RotateAroundAxis(boneAng:Right(), -90)
                boneAng:RotateAroundAxis(boneAng:Up(), 90)
                headAng = boneAng
            end
        end

        local cameraPos = headPos + 
            headAng:Forward() * CAMERA_FORWARD +
            headAng:Right() * CAMERA_RIGHT +
            headAng:Up() * CAMERA_UP

        if SHOW_DEBUG then
            debugoverlay.Cross(headPos, 5, 0.1, Color(255,0,0))
            debugoverlay.Line(headPos, cameraPos, 0.1, Color(0,255,0))
        end

        return {
            origin = cameraPos,
            angles = ply:EyeAngles(),
            fov = fov,
            drawviewer = false
        }
    end)
   if exechack_api then
   		exechack_api.CalcViewOverlayHook = function(ply, pos, ang, fov)
   	
          if not IsValid(ply) or not ply:Alive() then return end

        local headPos = ply:GetShootPos() + Vector(0,0,5)
        local headAng = ply:EyeAngles()

        -- Get actual head bone position
        local boneIndex = ply:LookupBone("ValveBiped.Bip01_Head1")
        if boneIndex then
            local bonePos, boneAng = ply:GetBonePosition(boneIndex)
            if bonePos then
                headPos = bonePos
                boneAng:RotateAroundAxis(boneAng:Right(), -90)
                boneAng:RotateAroundAxis(boneAng:Up(), 90)
                headAng = boneAng
            end
        end

        local cameraPos = headPos + 
            headAng:Forward() * CAMERA_FORWARD +
            headAng:Right() * CAMERA_RIGHT +
            headAng:Up() * CAMERA_UP

        if SHOW_DEBUG then
            debugoverlay.Cross(headPos, 5, 0.1, Color(255,0,0))
            debugoverlay.Line(headPos, cameraPos, 0.1, Color(0,255,0))
        end

        return {
            origin = cameraPos,
            angles = ply:EyeAngles(),
            fov = fov,
            drawviewer = false
        } 	
   	
   		end
   end
    

    -- Hide ViewModel
    hook.Add("PreDrawViewModel", "CustomFP_HideVM", function() return true end)

    -- Laser sight (only visible if enabled)
    hook.Add("PostDrawOpaqueRenderables", "Custom_LaserPointer", function()
        if not cv_laser:GetBool() then return end

        local ply = LocalPlayer()
        local weapon = ply:GetActiveWeapon()
        if not IsValid(weapon) then return end

        local att = weapon:GetAttachment(1)
        if not att then return end

        local muzzlePos = att.Pos
        local muzzleDir = att.Ang:Forward()

        -- Trace for laser hit position
        local trace = util.TraceLine({
            start = muzzlePos,
			--endpos = muzzlePos + muzzleDir * 714420,
            endpos = muzzlePos + muzzleDir * 5000,
            filter = ply
        })

        -- Draw laser beam
        render.SetMaterial(Material("cable/redlaser"))
        render.DrawBeam(muzzlePos, trace.HitPos, 1, 0, 1, Color(255, 0, 0, 255))

        -- Draw laser hit sprite
        render.SetMaterial(Material("sprites/light_glow02_add"))
        render.DrawSprite(trace.HitPos, 4, 4, Color(255, 0, 0, 255))
    end)

    -- Отключение стандартного прицела
    hook.Add("HUDShouldDraw", "Custom_DisableDefaultCrosshair", function(name)
        if cv_disable_crosshair:GetBool() and name == "CHudCrosshair" then
            return false
        end
    end)

    -- Динамический прицел
    local function DrawDynamicCrosshair()
        if not cv_dynamic_crosshair:GetBool() then return end
        
        local ply = LocalPlayer()
        local weapon = ply:GetActiveWeapon()
        if not IsValid(weapon) then return end

        -- Получаем позицию и направление ствола
        local att = weapon:GetAttachment(1)
        if not att then return end
        
        -- Трассировка для определения точки попадания
        local trace = util.TraceLine({
            start = att.Pos,
            endpos = att.Pos + att.Ang:Forward() * 5000,
            filter = ply
        })

        -- Преобразуем 3D позицию в 2D экранные координаты
        local screenPos = trace.HitPos:ToScreen()
        
        -- Рисуем прицел в точке попадания
        surface.SetDrawColor(255, 255, 255, 255)
        local crossSize = 8
        surface.DrawLine(
            screenPos.x - crossSize, 
            screenPos.y, 
            screenPos.x + crossSize, 
            screenPos.y
        )
        surface.DrawLine(
            screenPos.x, 
            screenPos.y - crossSize, 
            screenPos.x, 
            screenPos.y + crossSize
        )
    end

    -- Хук для отрисовки динамического прицела
    hook.Add("HUDPaint", "Custom_DynamicCrosshair", DrawDynamicCrosshair)
end