# frozen_string_literal: true

# This Karafka component is a Pro component under a commercial license.
# This Karafka component is NOT licensed under LGPL.
#
# All of the commercial components are present in the lib/karafka/pro directory of this
# repository and their usage requires commercial license agreement.
#
# Karafka has also commercial-friendly license, commercial support and commercial components.
#
# By sending a pull request to the pro components, you are agreeing to transfer the copyright of
# your code to Maciej Mensfeld.

module Karafka
  module Pro
    module Processing
      module Strategies
        module Aj
          # ActiveJob enabled
          # DLQ enabled
          # Manual offset management enabled
          #
          # AJ has manual offset management on by default and the offset management is delegated to
          # the AJ consumer. This means, we cannot mark as consumed always. We can only mark as
          # consumed when we skip given job upon errors. In all the other scenarios marking as
          # consumed needs to happen in the AJ consumer on a per job basis.
          module DlqMom
            include Strategies::Dlq::Mom

            # Features for this strategy
            FEATURES = %i[
              active_job
              dead_letter_queue
              manual_offset_management
            ].freeze

            # How should we post-finalize consumption.
            def handle_after_consume
              coordinator.on_finished do
                return if revoked?

                if coordinator.success?
                  # Do NOT commit offsets, they are comitted after each job in the AJ consumer.
                  coordinator.pause_tracker.reset
                elsif coordinator.pause_tracker.attempt <= topic.dead_letter_queue.max_retries
                  retry_after_pause
                else
                  coordinator.pause_tracker.reset
                  skippable_message, = find_skippable_message
                  dispatch_to_dlq(skippable_message) if dispatch_to_dlq?
                  # We can commit the offset here because we know that we skip it "forever" and
                  # since AJ consumer commits the offset after each job, we also know that the
                  # previous job was successful
                  mark_as_consumed(skippable_message)
                  pause(coordinator.seek_offset, nil, false)
                end
              end
            end
          end
        end
      end
    end
  end
end