import cron from 'node-cron';

const task_id_to_cron_job = new Map();

export function stop_all_cron_jobs() {
  for (const job of task_id_to_cron_job.values()) {
    job.stop();
  }
  task_id_to_cron_job.clear();
}

export function upsert_cron_job(schedule_task_id, cron_expression, on_tick) {
  const existing = task_id_to_cron_job.get(schedule_task_id);
  if (existing) {
    existing.stop();
    task_id_to_cron_job.delete(schedule_task_id);
  }

  const job = cron.schedule(cron_expression, on_tick, { scheduled: true });
  task_id_to_cron_job.set(schedule_task_id, job);
}

export function remove_cron_job(schedule_task_id) {
  const job = task_id_to_cron_job.get(schedule_task_id);
  if (!job) {
    return;
  }
  job.stop();
  task_id_to_cron_job.delete(schedule_task_id);
}