local running_average = {
  trackers = {}
}

local trackers = running_average.trackers

running_average.track = function(name, value)
  if not trackers[name] then
    trackers[name] = { running_total = 0, count = 0, }
  end
  local track = trackers[name]

  track.running_total = track.running_total + value
  track.count = track.count + 1

  return track.running_total / track.count
end

running_average.average = function(name)
  return trackers[name] and trackers[name].running_total / trackers[name].count
end

running_average.count = function(name)
  return trackers[name] and trackers[name].count
end

return running_average