#!/usr/bin/env python3

"""Parse the RSS feed of Arch Linux latest news.

Author: flyingscorpio
"""

import os
import subprocess
import feedparser  # type: ignore


def main() -> None:
    """Parse the rss feed."""

    last_seen_file_path = os.path.expanduser("~/.cache/arch_linux_news_last_seen")

    last_seen = ""

    try:
        with open(last_seen_file_path, "r") as last_seen_file:
            last_seen = last_seen_file.read().strip()
    except FileNotFoundError:
        pass

    url = "https://www.archlinux.org/feeds/news/"
    feed = feedparser.parse(url)
    summary = feed["feed"].get("summary")
    if summary is not None and "too many requests" in summary.lower():
        print("Arch Linux news: too many requests")
        return
    latest_title = feed["entries"][0]["title"]
    latest_link = feed["entries"][0]["link"]

    if os.environ.get("BLOCK_BUTTON", "") == "1":
        last_seen = feed["entries"][0]["published"]

        with open(last_seen_file_path, "w") as last_seen_file:
            last_seen_file.write(last_seen)

        subprocess.run(f"xdg-open {latest_link}", shell=True, check=True)

    if feed["entries"][0]["published"] != last_seen:
        print(latest_title)
    else:
        print("Arch Linux news is up to date")


if __name__ == "__main__":
    main()