import sys
import time
import json
import random
import logging
import feedparser
from io import BytesIO
try:
    from yt_dlp.extractor import youtube
except Exception as e:
    print(f'Failed to import yt_dlp due to {type(e).__name__}: {e}, importing youtube_dl', file=sys.stderr)
    from youtube_dl.extractor import youtube
from . import config, client, seen_videos

youtube._try_get = _try_get = youtube.try_get
def traverse_dict(src):
    for (key, value) in src.items():
        if key == 'scheduledStartTime':
            return value
        if isinstance(value, dict):
            if value := traverse_dict(value):
                return value
    return None

def try_get(src, getter, expected_type=None):
    if reason := src.get('reason'):
        if isinstance(reason, str) and (reason.startswith('This live event will begin in ') or reason.startswith('Premieres in ')):
            if t := _try_get(src, traverse_dict, str):
                src['reason'] = f'autoytarchive:{t} {reason}'
    return _try_get(src, getter, expected_type)
youtube.try_get = try_get

async def update_seen_videos():
    with BytesIO(json.dumps(seen_videos).encode()) as file:
        file.name = 'autoytarchive.json'
        file.seek(0)
        await client.edit_message(config['config']['storage_chat_id'], config['config']['storage_message_id'], file=file)

async def get_video_list(session, channel_id):
    invidious_instances = config['config'].get('invidious_instances', [])
    random.shuffle(invidious_instances)
    for i in invidious_instances:
        try:
            async with session.get(f'{i}/api/v1/channels/{channel_id}/latest?fields=videoId&a={time.time()}', headers={'Cache-Control': 'no-store, max-age=0'}) as resp:
                if resp.status != 200:
                    logging.error('Invidious instance %s returned %s', i, str(resp.status))
                    continue
                return list(map(lambda i: i['videoId'], await resp.json()))[:15]
        except BaseException:
            logging.exception('Invidious instance %s raised exception', i)
    async with session.get(f'https://www.youtube.com/feeds/videos.xml?channel_id={channel_id}&a={time.time()}', headers={'Cache-Control': 'no-store, max-age=0'}) as resp:
        d = feedparser.parse(await resp.text())
    return list(map(lambda i: i['yt_videoid'], d['entries']))[:15]