-- Signal function to execute when a client is started
client.connect_signal("manage", function(c)
  c.last_focus_date = unixtime()
end)

-- Signal function to execute when a client is terminated
client.connect_signal("unmanage", function (c)
  focus_recent_client(awful.tag.selected(awful.screen.focused()))
end)

-- Signal function to execute when a client gains focus
client.connect_signal("focus", function (c)
  c.last_focus_date = unixtime()
end)

-- Unix timestamp
function unixtime()
  return os.time(os.date("!*t"))
end

function focus_recent_client(t)
  local clientz = t:clients()
  if #clientz > 0 then
      local topc = clientz[1]
      for k,c in pairs(clientz) do
          if c.last_focus_date > topc.last_focus_date then
              topc = c
          end
      end
      client.focus = topc
      client.focus:raise()
  end
end

-- Attach this to every screen
for k,t in pairs(awful.tag.gettags(s)) do
  t:connect_signal("property::selected", function(t)
      focus_recent_client(t)
  end)
end