#!/usr/bin/env python3
import os, re, json, subprocess
from urllib.request import urlopen, Request

URL = "https://shop.nwnprod.com"  # page to watch
STATE = os.path.expanduser("~/.local/state/webwatch_beherit.json")

USER_AGENT = "Mozilla/5.0 (X11; Linux x86_64; rv:128.0) " "Gecko/20100101 Firefox/128.0"

# --- fetch html ---
req = Request(URL, headers={"User-Agent": USER_AGENT})
html = urlopen(req, timeout=15).read().decode("utf-8", "ignore")

# --- find product IDs and titles that contain 'Beherit' ---
pattern = re.compile(
    r"product_id=(\d+)[^>]*>([^<]*Beherit[^<]*)</a>", re.IGNORECASE | re.DOTALL
)
products = {
    pid: re.sub(r"\s+", " ", title).strip() for pid, title in pattern.findall(html)
}

# --- load previous seen IDs ---
seen = set()
if os.path.exists(STATE):
    with open(STATE) as f:
        seen = set(json.load(f))

# --- notify for new Beherit items ---
new = [(pid, title) for pid, title in products.items() if pid not in seen]
for pid, title in new:
    subprocess.run(
        ["notify-send", "-u", "critical", "-t", "0", "Beherit Alert", title],
        check=False,
    )
    print(f"New Beherit item: {title}")

# --- update state file ---
if new:
    with open(STATE, "w") as f:
        json.dump(sorted(products.keys()), f)