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

import httpx
from playwright.async_api import BrowserContext, async_playwright

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

log = get_logger(__name__)

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

API_FILE = Cache(Path(__file__).parent / "caches" / "strmfree_api.json", exp=86_400)

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

BASE_URL = "https://streamfree.to"


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

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

    data = r.json()

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

    return data


async def process_event(
    url: str,
    url_num: int,
    context: BrowserContext,
) -> str | None:

    page = await context.new_page()

    captured: list[str] = []

    got_one = asyncio.Event()

    handler = partial(network.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=6)
        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()


async def get_events(
    client: httpx.AsyncClient,
    url: str,
    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,
            urljoin(url, "streams"),
        )

        API_FILE.write(api_data)

    events: list[dict[str, str]] = []

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

    for category, streams in api_data["streams"].items():
        if not streams:
            continue

        for stream in streams:
            event_dt = Time.from_ts(stream["match_timestamp"])

            if not start_dt <= event_dt <= end_dt:
                continue

            sport, name = stream["league"], stream["name"]

            key = f"[{sport}] {name} (STRMFR)"

            if cached_keys & {key}:
                continue

            stream_url = stream["stream_key"]

            stream_logo = stream["thumbnail_url"]

            events.append(
                {
                    "sport": sport,
                    "event": name,
                    "link": urljoin(url, f"player/{category}/{stream_url}"),
                    "logo": urljoin(url, stream_logo),
                    "timestamp": event_dt.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,
        BASE_URL,
        set(cached_urls.keys()),
    )

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

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

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

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

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

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

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

                entry = {
                    "url": url,
                    "logo": logo or pic,
                    "base": "",
                    "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)