# frozen_string_literal: true

module DiscourseAi
  module AiBot
    class OpenAiBot < Bot
      def self.can_reply_as?(bot_user)
        open_ai_bot_ids = [
          DiscourseAi::AiBot::EntryPoint::GPT4_ID,
          DiscourseAi::AiBot::EntryPoint::GPT3_5_TURBO_ID,
        ]

        open_ai_bot_ids.include?(bot_user.id)
      end

      def prompt_limit
        3500
      end

      private

      def build_message(poster_username, content)
        role = poster_username == bot_user.username ? "system" : "user"

        { role: role, content: content }
      end

      def model_for
        return "gpt-4" if bot_user.id == DiscourseAi::AiBot::EntryPoint::GPT4_ID
        "gpt-3.5-turbo"
      end

      def update_with_delta(current_delta, partial)
        current_delta + partial.dig(:choices, 0, :delta, :content).to_s
      end

      def submit_prompt_and_stream_reply(prompt, &blk)
        DiscourseAi::Inference::OpenAiCompletions.perform!(
          prompt,
          model_for,
          temperature: 0.4,
          top_p: 0.9,
          max_tokens: 3000,
          &blk
        )
      end

      def tokenize(text)
        DiscourseAi::Tokenizer::OpenAiTokenizer.tokenize(text)
      end
    end
  end
end