import json
import logging
import os
import shutil

import spotipy
import spotipy.util as util
from hurry.filesize import size, alternative

from . import auth


def main():
    # Get Authorization
    logging.basicConfig(level=logging.INFO)
    logging.info("Authorizing with Spotify via Spotipy")
    logging.warning("May require User Interaction to authenticate properly!")
    token = util.prompt_for_user_token(
        username=auth.USERNAME,
        scope=auth.SCOPE,
        client_id=auth.CLIENT_ID,
        client_secret=auth.CLIENT_SECRET,
        redirect_uri=auth.REDIRECT_URI,
    )
    sp = spotipy.Spotify(auth=token)
    logging.info("Authorized with Spotify via Spotipy")

    tracks_folder = os.path.join(os.path.dirname(__file__), "tracks")
    logging.warning("Clearing all files in tracks folder for new files")
    if os.path.exists(tracks_folder):
        shutil.rmtree(tracks_folder)  # Delete folder and all contents (old track files)
    os.makedirs(tracks_folder)  # Recreate the folder just deleted
    logging.info("Cleared folder, ready to download new track files")

    curoffset, curlimit = 0, 50
    while curoffset >= 0:
        # Request and identify what was received
        logging.info("Requesting {} to {}".format(curoffset, curoffset + curlimit))
        response = sp.current_user_saved_tracks(limit=curlimit, offset=curoffset)
        received = len(response["items"])
        logging.info("Received {} to {}".format(curoffset, curoffset + received))
        # Create path/filename
        filename = f"saved-tracks-{curoffset}-{curoffset + received}.json"
        filepath = os.path.join(tracks_folder, filename)
        # Save track file
        with open(filepath, "w+") as file:
            json.dump(response, file)
        logging.info(
            'Saved at "{}" ({})'.format(
                f"\\tracks\\{filename}", size(os.path.getsize(filepath))
            )
        )
        # Decide whether we have received all possible tracks
        if received < curlimit:
            logging.info(
                "Requested and saved {} tracks split over {} files ({})".format(
                    curoffset + received,
                    len(os.listdir(tracks_folder)),
                    size(
                        sum(
                            os.path.getsize(os.path.join(tracks_folder, file))
                            for file in os.listdir(tracks_folder)
                        ),
                        system=alternative,
                    ),
                )
            )
            break
        # Continuing, so increment offset
        curoffset += curlimit