--[[
  Get counts per provided states

    Input:
      KEYS[1] wait key
      KEYS[2] paused key
      KEYS[3] meta key
      KEYS[4] prioritized key

      ARGV[1...] priorities
]]
local rcall = redis.call
local results = {}
local waitKey = KEYS[1]
local pausedKey = KEYS[2]
local prioritizedKey = KEYS[4]

for i = 1, #ARGV do
  local priority = tonumber(ARGV[i])
  if priority == 0 then
    results[#results+1] = rcall("LLEN", waitKey)
  else
    results[#results+1] = rcall("ZCOUNT", prioritizedKey,
      priority * 0x100000000, (priority + 1)  * 0x100000000 - 1)
  end
end

return results