class SendMailingRecipientJob < ApplicationJob
  queue_as :mailers

  def perform(recipient_id)
    recipient = MailingRecipient.find_by(id: recipient_id)
    return if recipient.nil?

    mailing = recipient.mailing
    return unless mailing.sending?
    return unless recipient.pending? || recipient.status == "queued"

    clock = Mailings::SendClock.new(mailing)
    unless clock.open?
      mailing.enqueue_next_recipient!(recipient, from: clock.next_open_at)
      return
    end

    if mailing.next_send_at.present? && mailing.next_send_at > Time.current
      wait = mailing.next_send_at - Time.current
      self.class.set(wait: wait).perform_later(recipient.id) if wait <= 2.minutes
      return
    end

    if recipient.pending? && Mailings::OutboundQueue.enqueue(recipient)
      nxt = mailing.mailing_recipients.pending.order(:id).first
      mailing.enqueue_next_recipient!(nxt, from: Time.current + mailing.interval_seconds.seconds)
    end

    DrainOutboundJob.perform_later
  end
end