import logging
import requests
from abc import *
from threading import Timer


class Grabber(ABC):
    db = None
    _interval = 60
    _running = False

    def __init__(self, db, interval):
        self.db = db
        self._interval = interval

    @property
    @abstractmethod
    def feed_url(self):
        raise NotImplementedError

    @abstractmethod
    def grab(self):
        raise NotImplementedError

    def request(self):
        response = requests.get(self.feed_url)
        response.raise_for_status()
        return response.content

    def timer(self):
        if self._running:
            self.grab()
            Timer(self._interval, self.timer).start()

    def start(self):
        if not self._running:
            self._running = True
            self.timer()
        else:
            logging.error(f"Grabber for {self.__class__.__name__} already started.")

    def stop(self):
        if self._running:
            self._running = False
        else:
            logging.error(f"Grabber for {self.__class__.__name__} already stopped.")