from typing import Generator, Type, Dict

from ..utils import config, error
from ..feeds import *


NAME_TO_FEED: Dict[str, Type[Feed]] = {
    "mastodon": MastodonFeed,
    "twitter": TwitterFeed,
}


class Routine:
    @staticmethod
    def iter_feeds() -> Generator[Type[Feed], None, None]:
        for feed in config.get_field("active_feeds", []):
            if feed not in NAME_TO_FEED:
                raise ValueError(f"Feed {feed} is not implemented.")
            
            yield NAME_TO_FEED[feed]

    @staticmethod
    def init_feed(feed: Type[Feed]) -> Feed:
        feed_config = config.get_field(feed.__config_name__, {})

        try:
            feed_instance = feed(**feed_config)
        except (TypeError, error.InvalidCredential) as e:
            print(feed_config)
            raise e
            config.set_field(feed.__name__, feed.prompt_auth(), update_dict=True)
            feed_config = config.get_field(feed.__config_name__, {})

        try:
            return feed(**feed_config)
        except (TypeError, error.InvalidCredential):
            raise error.InvalidCredential(f"Invalid credentials for {feed.__name__}.")


    def run(self):
        pass