import re
from os import listdir
from os.path import isfile, join
from datetime import datetime
from model import Audio


def find_audios(index, audio_dir):
    """
    Finds all audios in a folder that match the given index.
    Audios must be in the format [index].[songname].mp3
    :param index: An integer denoting the song's index
    :param audio_dir: The directory where the songs can be found
    :return: A list of matching Audio objects
    """
    res = []
    for f in listdir(audio_dir):
        full_file = join(audio_dir, f)
        re_date_match = re.match(r"^%03d\..*\.mp3$" % index, f)
        if not isfile(full_file) or not re_date_match:
            continue
        res.append(Audio(join("../", full_file)))
    return res