import asyncio
import re
from functools import partial
from urllib.parse import urljoin

from selectolax.parser import HTMLParser

from .utils import Cache, Time, get_logger, leagues, network

log = get_logger(__name__)

urls: dict[str, dict[str, str | float]] = {}

TAG = "VOLOKIT"

CACHE_FILE = Cache(TAG, exp=10_800)

HTML_CACHE = Cache(f"{TAG}-html", exp=28_800)

BASE_URL = "http://volokit.xyz"

SPORT_ENDPOINTS = {
    "mlb": "MLB",
    # "nfl": "NFL",
    "nhl": "NHL",
}


def fix_event(s: str) -> str:
    return " ".join(x.capitalize() for x in s.split())


async def process_event(url: str, url_num: int) -> str | None:
    if not (event_data := await network.request(url, log=log)):
        log.info(f"URL {url_num}) Failed to load url.")

        return

    soup = HTMLParser(event_data.content)

    if not (iframe := soup.css_first('iframe[height="100%"]')):
        log.warning(f"URL {url_num}) No iframe element found.")

        return

    if not (iframe_src := iframe.attributes.get("src")):
        log.warning(f"URL {url_num}) No iframe source found.")

        return

    if not (
        iframe_src_data := await network.request(
            iframe_src,
            headers={"Referer": url},
            log=log,
        )
    ):
        log.info(f"URL {url_num}) Failed to load iframe source.")

        return

    pattern = re.compile(r'source:\s+"([^"]*)"', re.I)

    if not (match := pattern.search(iframe_src_data.text)):
        log.warning(f"URL {url_num}) No Clappr source found.")

        return

    log.info(f"URL {url_num}) Captured M3U8")

    return match[1]


async def refresh_html_cache(
    url: str,
    sport: str,
    now: Time,
) -> dict[str, dict[str, str | float]]:

    events = {}

    if not (html_data := await network.request(url, log=log)):
        return events

    soup = HTMLParser(html_data.content)

    date = now.date()

    if date_node := soup.css_first("tr.date"):
        date = date_node.text(strip=True)

    for card in soup.css("#events .table .vevent.theevent"):
        if not (href := card.css_first("a").attributes.get("href")):
            continue

        name_node = card.css_first(".teamtd.event")

        time_node = card.css_first(".time")

        if not (name_node and time_node):
            continue

        name, time = name_node.text(strip=True), time_node.text(strip=True)

        event_sport = SPORT_ENDPOINTS[sport]

        event_name = fix_event(name)

        event_dt = Time.from_str(f"{date} {time}", timezone="UTC")

        key = f"[{event_sport}] {event_name} ({TAG})"

        events[key] = {
            "sport": event_sport,
            "event": event_name,
            "link": href,
            "event_ts": event_dt.timestamp(),
            "timestamp": now.timestamp(),
        }

    return events


async def get_events(cached_keys: list[str]) -> list[dict[str, str]]:
    now = Time.clean(Time.now())

    if not (events := HTML_CACHE.load()):
        log.info("Refreshing HTML cache")

        sport_urls = {
            sport: urljoin(BASE_URL, f"sport/{sport}") for sport in SPORT_ENDPOINTS
        }

        tasks = [
            refresh_html_cache(
                url,
                sport,
                now,
            )
            for sport, url in sport_urls.items()
        ]

        results = await asyncio.gather(*tasks)

        events = {k: v for data in results for k, v in data.items()}

        HTML_CACHE.write(events)

    live = []

    start_ts = now.delta(minutes=-30).timestamp()
    end_ts = now.delta(minutes=30).timestamp()

    for k, v in events.items():
        if k in cached_keys:
            continue

        if not start_ts <= v["event_ts"] <= end_ts:
            continue

        live.append(v)

    return live


async def scrape() -> None:
    cached_urls = CACHE_FILE.load()

    valid_urls = {k: v for k, v in cached_urls.items() if v["url"]}

    valid_count = cached_count = len(valid_urls)

    urls.update(valid_urls)

    log.info(f"Loaded {cached_count} event(s) from cache")

    log.info(f'Scraping from "{BASE_URL}"')

    events = await get_events(cached_urls.keys())

    if events:
        log.info(f"Processing {len(events)} new URL(s)")

        for i, ev in enumerate(events, start=1):
            handler = partial(
                process_event,
                url=(link := ev["link"]),
                url_num=i,
            )

            url = await network.safe_process(
                handler,
                url_num=i,
                semaphore=network.HTTP_S,
                log=log,
            )

            sport, event, ts = (
                ev["sport"],
                ev["event"],
                ev["event_ts"],
            )

            key = f"[{sport}] {event} ({TAG})"

            tvg_id, logo = leagues.get_tvg_info(sport, event)

            entry = {
                "url": url,
                "logo": logo,
                "base": link,
                "timestamp": ts,
                "id": tvg_id or "Live.Event.us",
                "link": link,
            }

            cached_urls[key] = entry

            if url:
                valid_count += 1

                urls[key] = entry

    if new_count := valid_count - cached_count:
        log.info(f"Collected and cached {new_count} new event(s)")

    else:
        log.info("No new events found")

    CACHE_FILE.write(cached_urls)