import atexit
import re
from dataclasses import dataclass
from hashlib import md5
from json import dumps
from time import time
from urllib.parse import parse_qs, urlparse

from apscheduler.schedulers.background import BackgroundScheduler
from apscheduler.triggers.interval import IntervalTrigger
import requests
from flask import Flask, jsonify


@dataclass
class Cache:
    data = {}
    last_updated = time()
    status = None

data = {
    "caches": {
        "now": Cache(),
        "listens": Cache()
    },
    "last_updated": time(),
    "etag": ""
}

def yt_cover(youtube_url):
    parsed_url = urlparse(youtube_url)

    if parsed_url.netloc in ("youtube.com", "music.youtube.com"):
        query_params = parse_qs(parsed_url.query)
        video_id = query_params.get('v', [None])[0]

    elif parsed_url.netloc == 'youtu.be':
        video_id = parsed_url.path[1:]

    if not video_id:
        return

    return f"https://img.youtube.com/vi/{video_id}/sddefault.jpg"

def parse_listens(json: dict) -> dict:
    new_json = {
        "count": json["count"],
        "listens": []
    }

    for track in json["listens"]:
        listened_at = track.get("listened_at", 0)
        track = track["track_metadata"]

        new_track = {
            "artist_name": track["artist_name"],
            "track_name": track["track_name"],
            "listened_at": listened_at
        }

        if mb := track.get("mbid_mapping"):
            new_track["id"] = mb.get("caa_release_mbid", mb["release_mbid"])
            new_track["artist_name"] = mb["artists"][0]["artist_credit_name"]
            new_track["track_name"] = mb["recording_name"]
        elif info := track.get("additional_info"):
            if info \
                .get("music_service_name", "") \
                .lower() in ("youtube", "youtube music"):
                    if cover := yt_cover(track["additional_info"]["origin_url"]):
                        new_track["cover_url"] = cover

        if "cover_url" not in new_track.keys() and "id" in new_track.keys():
            new_track["cover_url"] = "/asset/mb/" + new_track["id"]

        new_json["listens"].append(new_track)

    return new_json

def api_request(url: str, cache: Cache):
    try:
        response = requests.get(url, timeout=10)
        if response.status_code == 200:
            json = parse_listens(response.json().get("payload"))
            cache.status = 'success'

            if cache.data != json:
                cache.data = json
                cache.last_updated = time()
                data['last_updated'] = time()
                data['etag'] = md5(''.join(
                    ( dumps(data['caches'][x].data) for x in data['caches'] )
                ).encode()).hexdigest()
        else:
            cache.status = f'error: {response.status_code}'
    except Exception as e:
        cache.status = f'error: {str(e)}'

scheduler = BackgroundScheduler()
scheduler.add_job(
    func=lambda: api_request("https://api.listenbrainz.org/1/user/risdeveau/listens?count=5", data['caches']['listens']),
    trigger=IntervalTrigger(minutes=1),
    id='risdeveau.listenbrainz.listens',
    replace_existing=True
)
scheduler.add_job(
    func=lambda: api_request("https://api.listenbrainz.org/1/user/risdeveau/playing-now", data['caches']['now']),
    trigger=IntervalTrigger(seconds=15),
    id='risdeveau.listenbrainz.playing-now',
    replace_existing=True
)
scheduler.start()

atexit.register(lambda: scheduler.shutdown())