--[[
  Adds a delayed job to the queue by doing the following:
    - Creates a new job key with the job data.
    - adds to delayed zset.
    - Emits a global event 'delayed' if the job is delayed.
]]

-- Includes
--- @include "addDelayMarkerIfNeeded"
--- @include "getDelayedScore"

local function addDelayedJob(jobId, delayedKey, eventsKey, timestamp,
  maxEvents, markerKey, delay)

  local score, delayedTimestamp = getDelayedScore(delayedKey, timestamp, tonumber(delay))

  rcall("ZADD", delayedKey, score, jobId)
  rcall("XADD", eventsKey, "MAXLEN", "~", maxEvents, "*", "event", "delayed",
    "jobId", jobId, "delay", delayedTimestamp)

  -- mark that a delayed job is available
  addDelayMarkerIfNeeded(markerKey, delayedKey)
end