import re
from pathlib import Path
from urllib.parse import urljoin

import httpx
from selectolax.parser import HTMLParser

from .utils import (
    get_logger,
    league_info,
    load_cache,
    now,
    safe_process_event,
    write_cache,
)

log = get_logger(__name__)

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

BASE_URL = "https://streambtw.com/"

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


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}"\n{e}')
        return

    valid_m3u8 = re.compile(
        r'var\s+randomM3u8\s*=\s*[\'"]([^\'"]+)[\'"]',
        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 get_events(client: httpx.AsyncClient) -> list[dict[str, str]]:
    try:
        r = await client.get(BASE_URL)
        r.raise_for_status()
    except Exception as e:
        log.error(f'Failed to fetch "{BASE_URL}"\n{e}')

        return []

    soup = HTMLParser(r.text)

    events = []

    for card in soup.css("div.container div.card"):
        img = card.css_first("img.league-logo")

        logo = img.attrs.get("src") if img else None

        sport = card.css_first("h5.card-title").text(strip=True)

        name = card.css_first("p.card-text").text(strip=True)

        link = card.css_first("a.btn.btn-primary")

        if href := link.attrs.get("href"):
            events.append(
                {
                    "sport": sport,
                    "event": name,
                    "link": urljoin(BASE_URL, href),
                    "logo": logo,
                }
            )

    return events


async def main(client: httpx.AsyncClient) -> None:
    if cached := load_cache(CACHE_FILE, exp=86400, nearest_hr=True):
        urls.update(cached)
        log.info(f"Collected {len(urls)} event(s) from cache")
        return

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

    events = await get_events(client)

    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(client, url=ev["link"], url_num=i),
            url_num=i,
            log=log,
        )

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

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

            entry = {
                "url": url,
                "logo": ev["logo"] or league_info(sport)["logo"],
                "base": BASE_URL,
                "timestamp": now.timestamp(),
                "tvg-id": league_info(sport)["id"],
            }

            urls[key] = entry

    log.info(f"Collected {len(urls)} event(s)")

    write_cache(CACHE_FILE, urls)