# frozen_string_literal: true

module DiscourseAi
  module Summarization
    class EntryPoint
      def inject_into(plugin)
        plugin.add_to_serializer(:current_user, :can_summarize) do
          return false if !SiteSetting.ai_summarization_enabled
          scope.user.in_any_groups?(SiteSetting.ai_custom_summarization_allowed_groups_map)
        end

        plugin.add_to_serializer(:topic_view, :summarizable) do
          scope.can_see_summary?(object.topic)
        end

        plugin.add_to_serializer(:web_hook_topic_view, :summarizable) do
          scope.can_see_summary?(object.topic)
        end

        plugin.register_modifier(:topic_query_create_list_topics) do |topics, options|
          if Discourse.filters.include?(options[:filter]) && SiteSetting.ai_summarization_enabled &&
               SiteSetting.ai_summarize_max_hot_topics_gists_per_batch > 0
            topics.includes(:ai_summaries).where(
              "ai_summaries.id IS NULL OR ai_summaries.summary_type = ?",
              AiSummary.summary_types[:gist],
            )
          else
            topics
          end
        end

        plugin.add_to_serializer(
          :topic_list_item,
          :ai_topic_gist,
          include_condition: -> { scope.can_see_gists? },
        ) do
          return if !Discourse.filters.include?(options[:filter])
          summaries = object.ai_summaries.to_a

          # Summaries should always have one or zero elements here.
          # This is an extra safeguard to avoid including regular summaries.
          summaries.find { |s| s.summary_type == "gist" }&.summarized_text
        end

        # To make sure hot topic gists are inmediately up to date, we rely on this event
        # instead of using a scheduled job.
        plugin.on(:topic_hot_scores_updated) { Jobs.enqueue(:hot_topics_gist_batch) }

        # As this event can be triggered quite often, let's be overly cautious enqueueing
        # jobs if the feature is disabled.
        plugin.on(:post_created) do |post|
          if SiteSetting.discourse_ai_enabled && SiteSetting.ai_summarization_enabled &&
               SiteSetting.ai_summarize_max_hot_topics_gists_per_batch > 0 && post.topic
            hot_score = TopicHotScore.find_by(topic: post.topic)

            if hot_score.present? && hot_score.updated_at > 1.day.ago
              Jobs.enqueue(:update_hot_topic_gist, topic_id: post&.topic_id)
            end
          end
        end
      end
    end
  end
end