class OverlayRefreshJob < ApplicationJob
  queue_as :default

  INTERVAL = 2.seconds
  REDIS_CHAIN_KEY = "overlay_refresh:chain:%s"

  def self.schedule_chain(session_id)
    redis.set(format(REDIS_CHAIN_KEY, session_id), "1", ex: 48.hours.to_i)
    set(wait: INTERVAL).perform_later(session_id)
  end

  def self.cancel_chain(session_id)
    redis.del(format(REDIS_CHAIN_KEY, session_id))
  end

  def self.redis
    @redis ||= Redis.new(url: ENV.fetch("REDIS_URL", "redis://localhost:6379/0"))
  end

  def perform(session_id)
    return unless self.class.redis.get(format(REDIS_CHAIN_KEY, session_id))

    session = StreamSession.find_by(id: session_id)
    return self.class.cancel_chain(session_id) unless session
    return self.class.cancel_chain(session_id) if session.terminal?
    return self.class.cancel_chain(session_id) unless Streams::OverlayRelay.running?(session_id)

    Streams::Overlay::Refresh.call(session)
    Mediamtx::PublisherSync.new(session).call if session.status.in?(%w[connecting reconnecting live paused])
    if session.platform == "youtube"
      Streams::YoutubeRelay.ensure_publishing!(session)
    end
    self.class.set(wait: INTERVAL).perform_later(session_id)
  end
end