discourse/plugins/discourse-ai/lib/configuration/llm_enumerator.rb

# frozen_string_literal: true

require "enum_site_setting"

module DiscourseAi
  module Configuration
    class LlmEnumerator < ::EnumSiteSetting
      def self.global_usage
        rval = Hash.new { |h, k| h[k] = [] }

        if SiteSetting.ai_bot_enabled
          LlmModel.enabled_chat_bot_ids.each { |llm_id| rval[llm_id] << { type: :ai_bot } }
        end

        # this is unconditional, so it is clear that we always signal configuration
        AiAgent
          .where.not(default_llm_id: nil)
          .pluck(:default_llm_id, :name, :id)
          .each { |llm_id, name, id| rval[llm_id] << { type: :ai_agent, name: name, id: id } }

        if SiteSetting.ai_helper_enabled
          {
            "#{I18n.t("js.discourse_ai.features.ai_helper.proofread")}" =>
              SiteSetting.ai_helper_proofreader_agent,
            "#{I18n.t("js.discourse_ai.features.ai_helper.title_suggestions")}" =>
              SiteSetting.ai_helper_title_suggestions_agent,
            "#{I18n.t("js.discourse_ai.features.ai_helper.explain")}" =>
              SiteSetting.ai_helper_explain_agent,
            "#{I18n.t("js.discourse_ai.features.ai_helper.illustrate_post")}" =>
              SiteSetting.ai_helper_post_illustrator_agent,
            "#{I18n.t("js.discourse_ai.features.ai_helper.smart_dates")}" =>
              SiteSetting.ai_helper_smart_dates_agent,
            "#{I18n.t("js.discourse_ai.features.ai_helper.translator")}" =>
              SiteSetting.ai_helper_translator_agent,
            "#{I18n.t("js.discourse_ai.features.ai_helper.markdown_tables")}" =>
              SiteSetting.ai_helper_markdown_tables_agent,
            "#{I18n.t("js.discourse_ai.features.ai_helper.custom_prompt")}" =>
              SiteSetting.ai_helper_custom_prompt_agent,
          }.each do |helper_type, agent_id|
            next if agent_id.blank?

            agent = AiAgent.find_by(id: agent_id)
            next if agent.blank? || agent.default_llm_id.blank?

            model_id = agent.default_llm_id || SiteSetting.ai_default_llm_model.to_i
            rval[model_id] << { type: :ai_helper, name: helper_type }
          end
        end

        if SiteSetting.ai_post_image_captions_enabled
          image_caption_agent = AiAgent.find_by(id: SiteSetting.ai_image_caption_agent)

          if image_caption_agent.present?
            model_id = image_caption_agent.default_llm_id || SiteSetting.ai_default_llm_model.to_i

            rval[model_id] << { type: :ai_image_caption }
          end
        end

        if SiteSetting.ai_summarization_enabled
          summarization_agent = AiAgent.find_by(id: SiteSetting.ai_summarization_agent)
          model_id = summarization_agent.default_llm_id || SiteSetting.ai_default_llm_model.to_i

          rval[model_id] << { type: :ai_summarization }
        end

        if SiteSetting.ai_embeddings_semantic_search_enabled
          search_agent = AiAgent.find_by(id: SiteSetting.ai_embeddings_semantic_search_hyde_agent)
          model_id = search_agent.default_llm_id || SiteSetting.ai_default_llm_model.to_i

          rval[model_id] << { type: :ai_embeddings_semantic_search }
        end

        if SiteSetting.ai_spam_detection_enabled && AiModerationSetting.spam.present?
          model_id = AiModerationSetting.spam[:llm_model_id]
          rval[model_id] << { type: :ai_spam }
        end

        if defined?(DiscourseAutomation::Automation)
          DiscourseAutomation::Automation
            .joins(:fields)
            .where(script: %w[llm_report llm_triage])
            .where("discourse_automation_fields.name = ?", "model")
            .pluck(
              "metadata ->> 'value', discourse_automation_automations.name, discourse_automation_automations.id",
            )
            .each do |model_text, name, id|
              next if model_text.blank?
              model_id = model_text.to_i
              rval[model_id] << { type: :automation, name: name, id: id } if model_id.present?
            end
        end

        rval
      end

      def self.valid_value?(val)
        true
      end

      # returns an array of hashes (id: , name:, vision_enabled:, supported_native_tools:)
      def self.values_for_serialization
        return [] unless table_exists?

        llm_models = LlmModel.all.index_by(&:id)

        DB
          .query_hash(<<~SQL)
            SELECT id, display_name AS name, vision_enabled
            FROM llm_models
          SQL
          .map do |row|
            row = row.symbolize_keys
            llm_model = llm_models[row[:id]]
            row[:supported_native_tools] = DiscourseAi::Completions::NativeTools.supported_ids_for(
              llm_model,
            )
            row
          end
      end

      def self.values
        return [] unless table_exists?

        DB.query_hash(<<~SQL).map(&:symbolize_keys)
          SELECT display_name AS name, id AS value
          FROM llm_models
        SQL
      end

      def self.table_exists?
        DB.exec("SELECT 1 FROM llm_models LIMIT 0")
        true
      rescue StandardError
        false
      end
    end
  end
end