BEGIN;

CREATE OR REPLACE FUNCTION public.bootstrap_custom_instructions()
RETURNS SETOF public.custom_instructions
LANGUAGE plpgsql
SECURITY DEFINER
SET search_path = ''
AS $$
DECLARE
  current_user_id uuid := auth.uid();
BEGIN
  IF current_user_id IS NULL THEN
    RAISE EXCEPTION 'authentication_required' USING ERRCODE = '42501';
  END IF;

  PERFORM pg_advisory_xact_lock(hashtextextended(current_user_id::text, 73035));

  INSERT INTO public.custom_instructions (
    user_id, builtin_key, name, description, prompt, icon, sort_order
  )
  VALUES
    (
      current_user_id, 'translate_en', 'Translate to English',
      'Translate the input into natural English.',
      'Translate the following text into natural English. Return only the translation.',
      'translate', 10
    ),
    (
      current_user_id, 'summarize', 'Key summary',
      'Summarize the key points in no more than three lines.',
      'Summarize the following text in no more than three concise lines.',
      'list', 20
    ),
    (
      current_user_id, 'formal', 'Professional rewrite',
      'Rewrite in a formal business style while preserving meaning.',
      'Rewrite the following text in a formal business style while preserving its meaning. Return only the rewritten text.',
      'briefcase', 30
    ),
    (
      current_user_id, 'explain_code', 'Explain code',
      'Explain responsibilities and caveats in Korean.',
      'Explain the following code in Korean, including its responsibilities and important caveats.',
      'code', 40
    )
  ON CONFLICT DO NOTHING;

  INSERT INTO public.user_settings (user_id)
  VALUES (current_user_id)
  ON CONFLICT (user_id) DO NOTHING;

  RETURN QUERY
  SELECT instruction.*
  FROM public.custom_instructions AS instruction
  WHERE instruction.user_id = current_user_id
  ORDER BY instruction.sort_order, instruction.created_at, instruction.id;
END;
$$;

REVOKE ALL ON FUNCTION public.bootstrap_custom_instructions() FROM PUBLIC;
GRANT EXECUTE ON FUNCTION public.bootstrap_custom_instructions() TO authenticated;

COMMIT;