import asyncio
import json
from datetime import datetime, timedelta
from functools import partial
from pathlib import Path
from urllib.parse import urljoin

import httpx
from playwright.async_api import async_playwright
from selectolax.parser import HTMLParser

from .utils import (
    LOGOS,
    TZ,
    capture_req,
    firefox,
    get_base,
    get_logger,
    load_cache,
    now,
    safe_process_event,
)

log = get_logger(__name__)

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

CACHE_FILE = Path(__file__).parent / "caches" / "streameast.json"

MIRRORS = [
    "https://streameast.ga",
    "https://streameast.tw",
    "https://streameast.ph",
    "https://streameast.sg",
    "https://streameast.ch",
    "https://streameast.ec",
    "https://streameast.fi",
    "https://streameast.ms",
    "https://streameast.ps",
    "https://streameast.cf",
    "https://streameast.sk",
    "https://thestreameast.co",
    "https://thestreameast.fun",
    "https://thestreameast.ru",
    "https://thestreameast.su",
]

LOGOS["CFB"] = LOGOS["NCAAF"]
LOGOS["CBB"] = LOGOS["NCAAB"]


async def process_event(url: str, url_num: int) -> str | None:
    async with async_playwright() as p:
        browser, context = await firefox(p)

        page = await context.new_page()

        captured: list[str] = []

        got_one = asyncio.Event()

        handler = partial(capture_req, captured=captured, got_one=got_one)

        page.on("request", handler)

        try:
            await page.goto(url, wait_until="domcontentloaded", timeout=15_000)

            wait_task = asyncio.create_task(got_one.wait())

            try:
                await asyncio.wait_for(wait_task, timeout=10)
            except asyncio.TimeoutError:
                log.warning(f"URL {url_num}) Timed out waiting for M3U8.")
                return

            finally:
                if not wait_task.done():
                    wait_task.cancel()

                    try:
                        await wait_task
                    except asyncio.CancelledError:
                        pass

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

                return captured[-1]

            log.warning(f"URL {url_num}) No M3U8 captured after waiting.")
            return

        except Exception as e:
            log.warning(f"URL {url_num}) Exception while processing: {e}")
            return

        finally:
            page.remove_listener("request", handler)
            await page.close()
            await browser.close()


async def get_events(
    client: httpx.AsyncClient,
    url: str,
    cached_keys: list[str],
) -> list[dict[str, str]]:
    try:
        r = await client.get(url)
        r.raise_for_status()
    except Exception as e:
        log.error(f'Failed to fetch "{url}"\n{e}')

        return []

    soup = HTMLParser(r.text)
    events = []

    start_dt = now - timedelta(minutes=30)
    end_dt = now + timedelta(minutes=30)

    for li in soup.css("li.f1-podium--item"):
        a = li.css_first("a.f1-podium--link")

        if not a:
            continue

        href = urljoin(url, a.attributes.get("href", ""))

        sport = a.css_first(".MacBaslikKat").text(strip=True)

        name = a.css_first(".MacIsimleri").text(strip=True)

        time_span = a.css_first(".f1-podium--time")
        time_text = time_span.text(strip=True)
        timestamp = int(time_span.attributes.get("data-zaman"))

        key = f"[{sport}] {name}"

        if key in cached_keys:
            continue

        event_dt = datetime.fromtimestamp(timestamp, TZ)

        if time_text == "LIVE" or (start_dt <= event_dt < end_dt):
            events.append(
                {
                    "sport": sport,
                    "event": name,
                    "link": href,
                    "logo": LOGOS.get(
                        sport,
                        "https://i.gyazo.com/ec27417a9644ae517196494afa72d2b9.png",
                    ),
                }
            )

    return events


async def main(client: httpx.AsyncClient) -> None:
    cached_urls = load_cache(CACHE_FILE, exp=14400)
    cached_count = len(cached_urls)
    urls.update(cached_urls)

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

    if not (base_url := await get_base(client, MIRRORS)):
        log.warning("No working StreamEast mirrors")
        return

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

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

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

    for i, ev in enumerate(events, start=1):
        url = await safe_process_event(
            lambda: process_event(ev["link"], url_num=i),
            url_num=i,
            log=log,
        )

        if url:
            entry = {
                "url": url,
                "logo": ev["logo"],
                "timestamp": now.timestamp(),
            }

            key = f"[{ev['sport']}] {ev['event']}"

            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_text(json.dumps(cached_urls, indent=2), encoding="utf-8")