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

import httpx
from selectolax.parser import HTMLParser

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

log = get_logger(__name__)

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

BASE_URL = "https://roxiestreams.cc"

SPORT_URLS = {
    sport: urljoin(BASE_URL, sport.lower())
    for sport in ["Soccer", "MLB", "NBA", "NFL", "Fighting", "Motorsports"]
}

CACHE_FILE = Cache(Path(__file__).parent / "caches" / "roxie.json", exp=10_800)

HTML_CACHE = Cache(Path(__file__).parent / "caches" / "roxie_html.json", exp=28_800)


async def process_event(
    client: httpx.AsyncClient,
    url: str,
    url_num: int,
) -> str | None:

    try:
        r = await client.get(url)
        r.raise_for_status()
    except Exception as e:
        log.error(f'URL {url_num}) Failed to fetch "{url}": {e}')
        return

    valid_m3u8 = re.compile(
        r"showPlayer\(['\"]clappr['\"],\s*['\"]([^'\"]+?\.m3u8(?:\?[^'\"]*)?)['\"]\)",
        re.IGNORECASE,
    )

    if match := valid_m3u8.search(r.text):
        log.info(f"URL {url_num}) Captured M3U8")
        return match[1]

    log.info(f"URL {url_num}) No M3U8 found")


async def refresh_html_cache(
    client: httpx.AsyncClient,
    url: str,
    sport: str,
    now_ts: float,
) -> dict[str, str | float]:

    try:
        r = await client.get(url)
        r.raise_for_status()
    except Exception as e:
        log.error(f'Failed to fetch "{url}": {e}')

        return {}

    soup = HTMLParser(r.text)

    events = {}

    for row in soup.css("table#eventsTable tbody tr"):
        a_tag = row.css_first("td a")

        if not a_tag:
            continue

        event = a_tag.text(strip=True)

        if not (href := a_tag.attributes.get("href")):
            continue

        if not (span := row.css_first("span.countdown-timer")):
            continue

        data_start = span.attributes["data-start"]

        event_dt = Time.from_str(f"{data_start} PST", "%B %d, %Y %H:%M:%S")

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

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

    return events


async def get_events(
    client: httpx.AsyncClient,
    sport_urls: dict[str, str],
    cached_keys: set[str],
) -> list[dict[str, str]]:

    now = Time.clean(Time.now())

    if not (events := HTML_CACHE.load()):
        tasks = [
            refresh_html_cache(
                client,
                url,
                sport,
                now.timestamp(),
            )
            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 cached_keys & {k}:
            continue

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

        live.append({**v})

    return live


async def scrape(client: httpx.AsyncClient) -> None:
    cached_urls = CACHE_FILE.load()
    cached_count = len(cached_urls)
    urls.update(cached_urls)

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

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

    events = await get_events(
        client,
        SPORT_URLS,
        set(cached_urls.keys()),
    )

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

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

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

            if url:
                sport, event, ts = ev["sport"], ev["event"], ev["event_ts"]

                tvg_id, logo = leagues.info(sport)

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

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

                urls[key] = cached_urls[key] = entry

    if new_count := len(cached_urls) - 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)