"""
Spotify
"""
from django.conf import settings
from catalog.common import *
from catalog.models import *
from .douban import *
import time
import datetime
import requests
import dateparser
import logging


_logger = logging.getLogger(__name__)


spotify_token = None
spotify_token_expire_time = time.time()


@SiteList.register
class Spotify(AbstractSite):
    ID_TYPE = IdType.Spotify_Album
    URL_PATTERNS = [r'\w+://open\.spotify\.com/album/([a-zA-Z0-9]+)']
    WIKI_PROPERTY_ID = '?'
    DEFAULT_MODEL = Album

    @classmethod
    def id_to_url(self, id_value):
        return f"https://open.spotify.com/album/{id_value}"

    def scrape(self):
        api_url = "https://api.spotify.com/v1/albums/" + self.id_value
        headers = {
            'Authorization': f"Bearer {get_spotify_token()}"
        }
        res_data = BasicDownloader(api_url, headers=headers).download().json()
        artist = []
        for artist_dict in res_data['artists']:
            artist.append(artist_dict['name'])

        title = res_data['name']

        genre = ', '.join(res_data['genres'])

        company = []
        for com in res_data['copyrights']:
            company.append(com['text'])

        duration = 0
        track_list = []
        track_urls = []
        for track in res_data['tracks']['items']:
            track_urls.append(track['external_urls']['spotify'])
            duration += track['duration_ms']
            if res_data['tracks']['items'][-1]['disc_number'] > 1:
                # more than one disc
                track_list.append(str(
                    track['disc_number']) + '-' + str(track['track_number']) + '. ' + track['name'])
            else:
                track_list.append(str(track['track_number']) + '. ' + track['name'])
        track_list = '\n'.join(track_list)

        release_date = parse_date(res_data['release_date']).strftime('%Y-%m-%d')

        gtin = None
        if res_data['external_ids'].get('upc'):
            gtin = res_data['external_ids'].get('upc')
        if res_data['external_ids'].get('ean'):
            gtin = res_data['external_ids'].get('ean')
        isrc = None
        if res_data['external_ids'].get('isrc'):
            isrc = res_data['external_ids'].get('isrc')

        pd = ResourceContent(metadata={
            'title': title,
            'artist': artist,
            'genre': genre,
            'track_list': track_list,
            'release_date': release_date,
            'duration': duration,
            'company': company,
            'brief': None,
            'cover_image_url': res_data['images'][0]['url']
        })
        if gtin:
            pd.lookup_ids[IdType.GTIN] = gtin
        if isrc:
            pd.lookup_ids[IdType.ISRC] = isrc
        if pd.metadata["cover_image_url"]:
            imgdl = BasicImageDownloader(pd.metadata["cover_image_url"], self.url)
            try:
                pd.cover_image = imgdl.download().content
                pd.cover_image_extention = imgdl.extention
            except Exception:
                _logger.debug(f'failed to download cover for {self.url} from {pd.metadata["cover_image_url"]}')
        return pd


def get_spotify_token():
    global spotify_token, spotify_token_expire_time
    if get_mock_mode():
        return 'mocked'
    if spotify_token is None or is_spotify_token_expired():
        invoke_spotify_token()
    return spotify_token

    
def is_spotify_token_expired():
    global spotify_token_expire_time
    return True if spotify_token_expire_time <= time.time() else False


def invoke_spotify_token():
    global spotify_token, spotify_token_expire_time
    r = requests.post(
        "https://accounts.spotify.com/api/token",
        data={
            "grant_type": "client_credentials"
        },
        headers={
            "Authorization": f"Basic {settings.SPOTIFY_CREDENTIAL}"
        }
    )
    data = r.json()
    if r.status_code == 401:
        # token expired, try one more time
        # this maybe caused by external operations,
        # for example debugging using a http client
        r = requests.post(
            "https://accounts.spotify.com/api/token",
            data={
                "grant_type": "client_credentials"
            },
            headers={
                "Authorization": f"Basic {settings.SPOTIFY_CREDENTIAL}"
            }
        )
        data = r.json()
    elif r.status_code != 200:
        raise Exception(f"Request to spotify API fails. Reason: {r.reason}")
    # minus 2 for execution time error
    spotify_token_expire_time = int(data['expires_in']) + time.time() - 2
    spotify_token = data['access_token']


def parse_date(raw_str):
    return dateparser.parse(
        raw_str,
        settings={
            "RELATIVE_BASE": datetime.datetime(1900, 1, 1)
        }
    )