"""
This module contains mimi functions for the server.
"""

import os
import threading
import time
import requests

from io import BytesIO
from PIL import Image

from app import instances
from app import functions

home_dir = os.path.expanduser('~') + '/'
app_dir = os.path.join(home_dir, '.musicx')
last_fm_api_key = "762db7a44a9e6fb5585661f5f2bdf23a"

def background(f):
    '''
    a threading decorator
    use @background above the function you want to run in the background
    '''
    def background_func(*a, **kw):
        threading.Thread(target=f, args=a, kwargs=kw).start()
    return background_func


@background
def check_for_new_songs():
    flag = False

    while flag is False:
        functions.populate()
        time.sleep(300)


def run_fast_scandir(dir: str, ext: str) -> list:
    """
    Scans a directory for files with a specific extension. Returns a list of files and folders in the directory.
    """

    subfolders = []
    files = []

    for f in os.scandir(dir):
        if f.is_dir() and not f.name.startswith('.'):
            subfolders.append(f.path)
        if f.is_file():
            if os.path.splitext(f.name)[1].lower() in ext:
                files.append(f.path)

    for dir in list(subfolders):
        sf, f = run_fast_scandir(dir, ext)
        subfolders.extend(sf)
        files.extend(f)

    return subfolders, files


def remove_duplicates(array: list) -> list:
    """
    Removes duplicates from a list. Returns a list without duplicates.
    """

    song_num = 0

    while song_num < len(array) - 1:
        for index, song in enumerate(array):
            try:

                if array[song_num]["title"] == song["title"] and array[song_num]["album"] == song["album"] and array[song_num]["artists"] == song["artists"] and index != song_num:
                    array.remove(song)
            except:
                print('whe')
        song_num += 1

    return array


def save_image(url: str, path: str) -> None:
    """
    Saves an image from a url to a path.
    """

    response = requests.get(url)
    img = Image.open(BytesIO(response.content))
    img.save(path, 'JPEG')


def isValidFile(filename: str) -> bool:
    """
    Checks if a file is valid. Returns True if it is, False if it isn't.
    """

    if filename.endswith('.flac') or filename.endswith('.mp3'):
        return True
    else:
        return False


def create_config_dir() -> None:
    """
    Creates the config directory if it doesn't exist.
    """

    home_dir = os.path.expanduser('~')
    config_folder = os.path.join(home_dir, app_dir)

    dirs = ["", "images", "images/defaults",
            "images/artists", "images/thumbnails"]

    for dir in dirs:
        path = os.path.join(config_folder, dir)
        os.chmod(path, 0o755)
        try:
            os.makedirs(path)
        except FileExistsError:
            pass


def getAllSongs() -> None:
    """
    Gets all songs under the ~/ directory.
    """

    tracks = instances.songs_instance.get_all_songs()

    for track in tracks:
        try:
            os.chmod(os.path.join(home_dir, track['filepath']), 0o755)
        except FileNotFoundError:
            instances.songs_instance.remove_song_by_filepath(track['filepath'])

        if track['artists'] is not None:
            track['artists'] = track['artists'].split(', ')

    return tracks