-- BUG-704: rectification activity must advance chat_sessions.updated_at the
-- same way append_consultation_question does. Open / GET / metadata PATCH
-- still must not bump it (BUG-553).

begin;

do $migration$
begin
  if current_user <> 'schema_owner' then
    raise exception 'rectification_touch_chat_session_requires_schema_owner'
      using errcode = '42501';
  end if;
end
$migration$;

create or replace function public.touch_chat_session_from_rectification_case()
returns trigger
language plpgsql
security definer
set search_path = ''
as $$
begin
  if tg_op = 'UPDATE'
    and new.last_activity_at is not distinct from old.last_activity_at then
    return new;
  end if;
  update public.chat_sessions
  set updated_at = new.last_activity_at
  where id = new.session_id
    and user_id = new.user_id
    and session_type = 'birth_time_rectification'
    and updated_at is distinct from new.last_activity_at
    and updated_at < new.last_activity_at;
  return new;
end;
$$;

drop trigger if exists agentic_rectification_cases_touch_chat_session
  on public.agentic_rectification_cases;

create trigger agentic_rectification_cases_touch_chat_session
after update of last_activity_at on public.agentic_rectification_cases
for each row
execute function public.touch_chat_session_from_rectification_case();

revoke all on function public.touch_chat_session_from_rectification_case()
  from public, anon, authenticated;
grant execute on function public.touch_chat_session_from_rectification_case()
  to schema_owner;

commit;