class DrainOutboundJob < ApplicationJob
  queue_as :mailers

  def perform
    result = Mailings::OutboundQueue.drain_one!
    return unless result.in?(%i[sent deferred wait])
    return unless Mailings::OutboundQueue.queued_scope.exists?

    wait = Mailings::OutboundQueue.seconds_until_next_slot
    wait = 0 if wait.blank? || wait.negative?
    max_wait = [ Mailings::OutboundQueue.min_interval.to_f, 2.minutes ].max + 5.seconds
    return if wait > max_wait

    self.class.set(wait: wait).perform_later
  end
end