# -*- coding: utf-8 -*-
from abc import ABC, abstractmethod
from typing import Any, Dict

from ..srne import Srne


class BaseConsumer(ABC):
    settings: Dict[str, Any]
    srne: Srne

    @abstractmethod
    def __init__(self, settings: Dict[str, Any], srne: Srne) -> None:
        self.srne = srne
        self.config(settings)

    @abstractmethod
    def write(self, data: Dict[str, Any]):
        """
        Process and send data to wherever it is going.
        Avoid blocking.
        """
        pass

    @abstractmethod
    def poll(self):
        """
        This function will be ran whenever there is down time.
        If your consumer needs to do something periodically, do so here.
        This function should not block.
        """
        pass

    def exit(self):
        """
        Called on exit, clean up your handles here
        """
        pass

    def config(self, settings: Dict[str, Any]):
        self.settings = settings

    def __enter__(self):
        return self

    def __exit__(self, etype, value, traceback):
        self.exit()