def METHOD_NAME(tasks):
    """
    :param tasks: {
        'add-every-monday-morning': {
            'task': 'tasks.add' # A registered celery task,
            'interval': 30,
            'crontab': "30 7 * * *",
            'args': (16, 16),
            'kwargs': {},
            'enabled': False,
            'description': ''
        },
    }
    :return:
    """
    # Todo: check task valid, task and callback must be a celery task
    for name, detail in tasks.items():
        interval = None
        crontab = None
        last_run_at = None
        try:
            IntervalSchedule.objects.all().count()
        except (ProgrammingError, OperationalError):
            return None
        if isinstance(detail.get("interval"), int):
            kwargs = dict(
                every=detail['interval'],
                period=IntervalSchedule.SECONDS,
            )
            # 不能使用 get_or_create，因为可能会有多个
            interval = IntervalSchedule.objects.filter(**kwargs).first()
            if interval is None:
                interval = IntervalSchedule.objects.create(**kwargs)
            last_run_at = local_now()
        elif isinstance(detail.get("crontab"), str):
            try:
                minute, hour, day, month, week = detail["crontab"].split()
            except ValueError:
                logger.error("crontab is not valid")
                return
            kwargs = dict(
                minute=minute, hour=hour, day_of_week=week,
                day_of_month=day, month_of_year=month, timezone=get_current_timezone()
            )
            crontab = CrontabSchedule.objects.filter(**kwargs).first()
            if crontab is None:
                crontab = CrontabSchedule.objects.create(**kwargs)
        else:
            logger.error("Schedule is not valid")
            return
        defaults = dict(
            interval=interval,
            crontab=crontab,
            name=name,
            task=detail['task'],
            enabled=detail.get('enabled', True),
            args=json.dumps(detail.get('args', [])),
            kwargs=json.dumps(detail.get('kwargs', {})),
            description=detail.get('description') or '',
            last_run_at=last_run_at,
        )
        task = PeriodicTask.objects.update_or_create(
            defaults=defaults, name=name,
        )
        PeriodicTasks.update_changed()
        return task