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

import httpx
from playwright.async_api import async_playwright
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]] = {}

CACHE_FILE = Cache("vuen.json", exp=3_600)

API_FILE = Cache("vuen-html.json", exp=28_800)

BASE_URL = "https://vuen.link"


async def refresh_api_cache(
    client: httpx.AsyncClient,
    url: str,
) -> dict[str, list[dict]]:
    log.info("Refreshing API cache")

    data = {}

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

        return data

    soup = HTMLParser(r.text)

    for script in soup.css("script"):
        if not script:
            continue

        content = script.text(strip=True)

        if not (
            match := re.search(
                r"window\.matches\s*=\s*JSON\.parse\(`(.*?)`\)",
                content,
                re.DOTALL,
            )
        ):
            continue

        data["matches"] = json.loads(match[1])

        data["timestamp"] = Time.now().timestamp()

        break

    return data


async def get_events(
    client: httpx.AsyncClient,
    cached_keys: set[str],
) -> list[dict[str, str]]:
    if not (api_data := API_FILE.load(per_entry=False)):
        api_data = await refresh_api_cache(client, BASE_URL)

        API_FILE.write(api_data)

    events = []

    now = Time.clean(Time.now())
    start_dt = now.delta(minutes=-30)
    end_dt = now.delta(minutes=30)

    for match in api_data.get("matches", []):
        if not (ts := match.get("startTimestamp")):
            continue

        start_ts = int(f"{ts}"[:-3])

        event_dt = Time.from_ts(start_ts)

        if not start_dt <= event_dt <= end_dt:
            continue

        event_name = match["matchstr"]

        sport = match["league"]

        channels: list[dict[str, str | list[str]]] = match.get("channels", [])

        event_link = None

        if not channels:
            event_link = urljoin(BASE_URL, match["slug"])

        for channel in channels:
            event_link = (channel.get("oldLinks") or channel.get("links") or [None])[0]

            if event_link:
                break

        if not event_link:
            continue

        key = f"[{sport}] {event_name} (VUEN)"

        if cached_keys & {key}:
            continue

        events.append(
            {
                "sport": sport,
                "event": event_name,
                "link": event_link,
                "timestamp": now.timestamp(),
            }
        )

    return events


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, set(cached_urls.keys()))

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

    if events:
        async with async_playwright() as p:
            browser, context = await network.browser(p)

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

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

                if url:
                    sport, event, ts = (
                        ev["sport"],
                        ev["event"],
                        ev["timestamp"],
                    )

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

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

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

                    urls[key] = cached_urls[key] = entry

            await browser.close()

    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)