from __future__ import annotations

import argparse
import json
import sys
from dataclasses import asdict
from urllib.request import Request, urlopen

from .community_sources import parse_rf4db_catches, parse_rf4stat_fishing, parse_rf4stat_posts


SOURCES = {
    "rf4db": ("https://download.rf4db.com/ru/catches", parse_rf4db_catches),
    "rf4stat-fishing": ("https://rf4-stat.ru/fishing/", parse_rf4stat_fishing),
    "rf4stat-posts": ("https://rf4-stat.ru/posts/", parse_rf4stat_posts),
}
USER_AGENT = "RF4-Spotter/0.1 (authorized data integration)"


def fetch_html(url: str, *, timeout: float = 30) -> str:
    request = Request(url, headers={"User-Agent": USER_AGENT, "Accept": "text/html"})
    with urlopen(request, timeout=timeout) as response:
        if response.headers.get_content_type() != "text/html":
            raise ValueError(f"expected text/html, got {response.headers.get_content_type()}")
        return response.read().decode(response.headers.get_content_charset() or "utf-8")


def main(argv: list[str] | None = None) -> int:
    parser = argparse.ArgumentParser(description="Fetch one authorized RF4 community source page")
    parser.add_argument("source", choices=SOURCES)
    parser.add_argument("--url", help="Override the configured public page URL")
    parser.add_argument("--limit", type=int, default=100, choices=range(1, 501), metavar="1..500")
    args = parser.parse_args(argv)
    default_url, parse = SOURCES[args.source]
    url = args.url or default_url
    try:
        records = parse(fetch_html(url))[:args.limit]
    except Exception as exc:
        print(f"community source failed: {exc}", file=sys.stderr)
        return 1
    print(json.dumps([asdict(item) for item in records], ensure_ascii=False, default=str))
    return 0


if __name__ == "__main__":
    raise SystemExit(main())