import itertools
import random
from typing import Sequence

from ..dav_common import dav_get_file


async def get_loesungswort() -> str:
    fp = await dav_get_file("loesungswort.txt")
    return fp.read().decode("utf8").strip()



async def set_length(seq: Sequence, length: int) -> list:
    # `seq` unendlich wiederholen
    infinite = itertools.cycle(seq)
    # Die ersten `length` einträge nehmen
    return list(itertools.islice(infinite, length))


async def shuffle(seq: Sequence) -> list:
    # Zufallsgenerator
    rnd = random.Random(await get_loesungswort())

    # Elemente mischen
    return rnd.sample(seq, len(seq))