if SERVER then

	--------------------------------------------------
	AFK_TIME = 1800

	AFK_WARN_TIME = 1500
	--------------------------------------------------

	util.AddNetworkString( "AfkTimerReset" )

	net.Receive( "AfkTimerReset", function( len, pl )
		if ( IsValid( pl ) and pl:IsPlayer() ) then
			pl.AnyKeyPressed = true
			timer.Simple(0, function() ply.AnyKeyPressed = false end)
		end
	end )

	hook.Add("PlayerInitialSpawn", "MakeAFKVar", function(ply)
		ply.NextAFK = CurTime() + AFK_TIME
	end)

	hook.Add("Think", "HandleAFKPlayers", function()
		for _, ply in pairs (player.GetAll()) do
			if ( ply:IsConnected() and ply:IsFullyAuthenticated() ) then

				if (!ply.NextAFK) then
					ply.NextAFK = CurTime() + AFK_TIME
				end

				local afktime = ply.NextAFK
				if (CurTime() >= afktime - AFK_WARN_TIME) and (!ply.Warning) then
					ply:ChatPrint("Warning: You will be kicked soon if you are inactive.")

					ply.Warning = true
				elseif (CurTime() >= afktime) and (ply.Warning) then
					ply.Warning = nil
					ply.NextAFK = nil
					ply:Kick("Kicked for being AFK for 30 minutes.\n")
				end
			end
		end
	end)

	hook.Add("KeyPress", "PlayerMoved", function(ply, key)
		if ply.AnyKeyPressed and ply.LastPos != ply:GetPos() then
			ply.LastPos = ply:GetPos()
			ply.NextAFK = CurTime() + AFK_TIME
			ply.Warning = false
		end
	end)

else

	local function IsAnyKeyPressed()
		i=0
		while i<KEY_COUNT do
			if input.WasKeyPressed( i ) then return true end
			i=i+1
		end
		return false
	end

	hook.Add("PlayerTick", "PlayerPressedButton", function(ply)
		if IsAnyKeyPressed() then
			net.Start( "AfkTimerReset" )
			net.SendToServer()
		end
	end)

end