from crawler.q import RedisQueue
from settings import REDIS_QUERY, REDIS_EXCAVATE


class Scheduler:

    def __init__(self, queue=None):
        self.mrq = (queue or RedisQueue())

    def _add_tasks(self, classify: str, tasks, level=1, **kwargs):
        allow_output_log = kwargs.get('allow_output_log', True)
        if isinstance(tasks, list):
            _tasks = tasks
        else:
            _tasks = [tasks]

        if classify.lower() == 'query':
            self.mrq.push_task(
                REDIS_QUERY,
                _tasks,
                level=level,
                allow_output_log=allow_output_log
            )
        elif classify.lower() == 'excavate':
            self.mrq.push_task(
                REDIS_EXCAVATE,
                _tasks,
                level=level,
                allow_output_log=allow_output_log
            )

    def add_query(self, tasks, level=1, **kwargs):
        self._add_tasks('query', tasks, level, **kwargs)

    def add_excavate(self, tasks, level=1, **kwargs):
        self._add_tasks('excavate', tasks, level, **kwargs)

    def _get_task(self, classify: str):
        if classify.lower() == 'query':
            return self.mrq.pop_task([REDIS_QUERY])

        elif classify.lower() == 'excavate':
            return self.mrq.pop_task([REDIS_EXCAVATE])

    def get_excavate_task(self):
        return self._get_task('excavate')

    def get_query_task(self):
        return self._get_task('query')