class ResumeMailingsJob < ApplicationJob
  queue_as :mailers

  STALE_QUEUED_AFTER = 10.minutes

  def perform
    recover_stale_queued!
    Mailing.sending.due_to_send.find_each do |mailing|
      next unless Mailings::SendClock.new(mailing).open?
      next if mailing.mailing_recipients.queued.exists?

      recipient = mailing.mailing_recipients.pending.order(:id).first
      next unless recipient

      SendMailingRecipientJob.perform_later(recipient.id)
    end
  end

  private

  def recover_stale_queued!
    MailingRecipient.queued.where("updated_at < ?", STALE_QUEUED_AFTER.ago).find_each do |recipient|
      next unless recipient.mailing.sending?

      recipient.update!(status: "pending", error_message: nil)
    end
  end
end