-- Nightly sprint auto-close + rollover job
-- Schedule: 12:01 AM UTC every day

CREATE EXTENSION IF NOT EXISTS pg_cron;

CREATE OR REPLACE FUNCTION public.complete_ended_sprints_and_rollover()
RETURNS void
LANGUAGE plpgsql
SECURITY DEFINER
SET search_path = public
AS $$
DECLARE
  ended_sprint RECORD;
  next_sprint_id UUID;
BEGIN
  FOR ended_sprint IN
    SELECT id, project_id
    FROM public.sprints
    WHERE status <> 'completed'
      AND end_date < CURRENT_DATE
    ORDER BY end_date ASC, start_date ASC
  LOOP
    -- Pick the next non-completed sprint in the same project.
    SELECT s.id
      INTO next_sprint_id
    FROM public.sprints s
    WHERE s.project_id = ended_sprint.project_id
      AND s.status <> 'completed'
      AND s.id <> ended_sprint.id
    ORDER BY s.start_date ASC
    LIMIT 1;

    IF next_sprint_id IS NOT NULL THEN
      UPDATE public.tasks
      SET sprint_id = next_sprint_id
      WHERE sprint_id = ended_sprint.id
        AND status NOT IN ('done', 'canceled', 'archived');
    END IF;

    UPDATE public.sprints
    SET status = 'completed'
    WHERE id = ended_sprint.id;
  END LOOP;
END;
$$;

DO $$
DECLARE
  existing_job_id BIGINT;
BEGIN
  -- Keep this idempotent: replace existing job if present.
  SELECT jobid
    INTO existing_job_id
  FROM cron.job
  WHERE jobname = 'nightly-sprint-rollover-0001'
  LIMIT 1;

  IF existing_job_id IS NOT NULL THEN
    PERFORM cron.unschedule(existing_job_id);
  END IF;

  PERFORM cron.schedule(
    'nightly-sprint-rollover-0001',
    '1 0 * * *',
    'select public.complete_ended_sprints_and_rollover();'
  );
END;
$$;