--original mod by leeroy newman

if !ConVarExists("reloadviewanimsmooth") then
    CreateClientConVar("reloadviewanimsmooth", 0.4, true, true)
end

if !ConVarExists("reloadviewanimpitchdiv") then
    CreateClientConVar("reloadviewanimpitchdiv", 10, true, true)
end

if !ConVarExists("reloadviewanimyawdiv") then
    CreateClientConVar("reloadviewanimyawdiv", 25, true, true)
end

if !ConVarExists("reloadviewanimrolldiv") then
    CreateClientConVar("reloadviewanimrolldiv", 25, true, true)
end

if !ConVarExists("reloadviewanimdiv") then
    CreateClientConVar("reloadviewanimdiv", 10, true, true)
end

if !ConVarExists("reloadviewanimroll") then
    CreateClientConVar("reloadviewanimroll", 1, true, true)
end

if !ConVarExists("reloadviewanimyaw") then
    CreateClientConVar("reloadviewanimyaw", 1, true, true)
end

if !ConVarExists("reloadviewanimpitch") then
    CreateClientConVar("reloadviewanimpitch", 1, true, true)
end

if !ConVarExists("reloadviewanim") then
    CreateClientConVar("reloadviewanim", 1, true, true)
end

ReloadViewAnim = {}
ReloadViewAnim.LastAng = Angle(0,0,0)
ReloadViewAnim.Angles = Angle(0,0,0)
ReloadViewAnim.LastAnim = "deploy"
ReloadViewAnim.AnimTime = 0
ReloadViewAnim.NextReload = CurTime()

if CLIENT then

    function ReloadViewAnimCalcView(ply, origin, angles, fov)
	if GetConVarNumber("reloadviewanim") <= 0 then return end
	    local self = ply:GetActiveWeapon()
        local vm = ply:GetViewModel()
		local view = GAMEMODE:CalcView( ply, origin, angles, fov )
		if vm == nil or view == nil then return end
		if ReloadViewAnim.NextReload >= CurTime() then
	    local SelectedAttachement = vm:LookupAttachment("muzzle")
	    if SelectedAttachement == 0 then
	        SelectedAttachement = vm:LookupAttachment("1")
	    end
		local CurrentAttachment = vm:GetAttachment(SelectedAttachement)
	    if SelectedAttachement == nil or CurrentAttachment == nil then return end
	    local AttPos, AttAng = CurrentAttachment.Pos, CurrentAttachment.Ang + ply:GetAimVector()
		if AttPos == nil or AttAng == nil then return end

		if self:GetNWBool("DoReloadViewAnim") then

			local Diffp = ReloadViewAnim.Angles.p - (view.angles.p + AttAng.p)
			local Diffy = ReloadViewAnim.Angles.y - (view.angles.y + AttAng.y)
			local Diffr = ReloadViewAnim.Angles.r - (view.angles.y + AttAng.r)

			if ( math.abs(view.angles.y - ReloadViewAnim.Angles.y) > 180 ) then
		        if ( (view.angles.y - ReloadViewAnim.Angles.y) < 0 ) then
			        view.angles.y = view.angles.y + 360
		        else
			        view.angles.y = view.angles.y - 360
		        end
	        end

		    ReloadViewAnim.LastAng = ReloadViewAnim.Angles
			if GetConVarNumber("reloadviewanimpitch") >= 1 then
		        ReloadViewAnim.Angles.p = math.Approach(ReloadViewAnim.LastAng.p, (view.angles.p + AttAng.p) / GetConVarNumber("reloadviewanimpitchdiv"), FrameTime() * (Diffp * GetConVarNumber("reloadviewanimsmooth")))
			end
			if GetConVarNumber("reloadviewanimyaw") >= 1 then
			    ReloadViewAnim.Angles.y = math.Approach(ReloadViewAnim.LastAng.y, (view.angles.y + AttAng.y) / GetConVarNumber("reloadviewanimyawdiv"), FrameTime() * (Diffy * GetConVarNumber("reloadviewanimsmooth")))
			end
			if GetConVarNumber("reloadviewanimroll") >= 1 then
			    ReloadViewAnim.Angles.r = math.Approach(ReloadViewAnim.LastAng.r, (view.angles.r + AttAng.r) / GetConVarNumber("reloadviewanimrolldiv"), FrameTime() * (Diffr * GetConVarNumber("reloadviewanimsmooth")))
			end

		end

		elseif ReloadViewAnim.NextReload < CurTime() and self:GetNWBool("DoReloadViewAnim") == false and ReloadViewAnim.Angles.p != 0 or ReloadViewAnim.Angles.y != 0 or ReloadViewAnim.Angles.r != 0 then

			local Diffp = ReloadViewAnim.Angles.p - 0
			local Diffy = ReloadViewAnim.Angles.y - 0
			local Diffr = ReloadViewAnim.Angles.r - 0

            ReloadViewAnim.LastAng = ReloadViewAnim.Angles
		    ReloadViewAnim.Angles.p = math.Approach(ReloadViewAnim.LastAng.p, 0, FrameTime() * (Diffp * 10))
			ReloadViewAnim.Angles.y = math.Approach(ReloadViewAnim.LastAng.y, 0, FrameTime() * (Diffy * 10))
			ReloadViewAnim.Angles.r = math.Approach(ReloadViewAnim.LastAng.r, 0, FrameTime() * (Diffr * 10))

		end

		view.angles.p = ReloadViewAnim.Angles.p + view.angles.p
		view.angles.y = ReloadViewAnim.Angles.y + view.angles.y
		view.angles.r = ReloadViewAnim.Angles.r + view.angles.r

    end
    hook.Add("CalcView", "ReloadViewAnimCalcView", ReloadViewAnimCalcView)

    function ReloadViewAnimKeyPress(ply, key)
		local weapon = ply:GetActiveWeapon()
		local vm = ply:GetViewModel()
        if !ply:Alive() or ReloadViewAnim.NextReload > CurTime() or weapon.Primary == nil then return end
        if ( weapon:Clip1() < weapon.Primary.ClipSize ) and ply:GetAmmoCount(weapon.Primary.Ammo) > 0 and weapon:GetNWBool("DoReloadViewAnim") == false then
            if ( key == IN_RELOAD ) or ( key == IN_ATTACK ) and vm:GetSequence() == vm:LookupSequence("reload") then
		        weapon:SetNWBool("DoReloadViewAnim", true)
			    timer.Simple( 0.1, function()
                    local duration = weapon:SequenceDuration() - 0.25
                    ReloadViewAnim.NextReload = CurTime() + duration - 0.25
                    timer.Simple(duration, function()
                        weapon:SetNWBool("DoReloadViewAnim", false)
                    end, weapon)
                end, ply)
		    end
        end
	end
    hook.Add("KeyPress","ReloadViewAnimKeyPress",ReloadViewAnimKeyPress)
end