import re
from pathlib import Path
from typing import Dict, Generator, List, Set, Type, Union

from ..download import Downloader, Page, components
from ..utils.config import main_settings
from .utils import ask_for_bool, cli_function


class GenreIO(components.HumanIO):
    @staticmethod
    def ask_to_create(option: components.Option) -> bool:
        output()
        return ask_for_bool(f"create the genre {BColors.OKBLUE.value}{option.value}{BColors.ENDC.value}")

    @staticmethod
    def not_found(key: str) -> None:
        output(f"\ngenre {BColors.BOLD.value}{key}{BColors.ENDC.value} not found\n", color=BColors.FAIL)


def _genre_generator() -> Generator[str, None, None]:
    def is_valid_genre(genre: Path) -> bool:
        """
        gets the name of all subdirectories of shared.MUSIC_DIR,
        but filters out all directories, where the name matches with any Patern
        from shared.NOT_A_GENRE_REGEX.
        """
        if not genre.is_dir():
            return False

        if any(re.match(regex_pattern, genre.name) for regex_pattern in main_settings["not_a_genre_regex"]):
            return False

        return True
    
    for genre in filter(is_valid_genre, main_settings["music_directory"].iterdir()):
        yield genre.name

def get_genre() -> str:
    select_genre = components.Select(
        human_io=GenreIO,
        can_create_options=True,
        data=_genre_generator(),
    )
    genre: Optional[components.Option[str]] = None

    while genre is None:
        print(select_genre.pprint())
        print()

        genre = select_genre.choose(input("> "))

    return genre.value