#!/usr/bin/env python3
"""alib.ru book-marketplace search (3.2M listings, RU+KZ sellers).

Usage: tools/alib.py "query"

Site specifics (verified 2026-07-09):
- Endpoint: https://www.alib.ru/find3.php4?tfind=<query>
- Encoding: query must be **CP1251** percent-encoded (utf8 → mojibake "РќРѕР").
- Pages are CP1251.
- Search is STEM-BASED (word matches all inflections — unlike libgen) + phrase mode with
  double quotes; also author-first, year-range, ISBN-digits, price-range fields.
- Result rows: "<cat> || <Author> <Title> |Серия: ... <City> <Year> <Pages> <Binding>.
  (Seller X, city.) Цена: N руб." — i.e. listings, not library records: good for
  small-press / rare / out-of-print RU editions that shops don't carry.
"""
import re, sys, time, urllib.parse, urllib.request

UA = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36"

def alib(q):
    enc = urllib.parse.quote(q.encode("cp1251", errors="replace"))
    url = f"https://www.alib.ru/find3.php4?tfind={enc}"
    req = urllib.request.Request(url, headers={"User-Agent": UA})
    with urllib.request.urlopen(req, timeout=40) as r:
        return r.read().decode("cp1251", errors="replace")

def main():
    if len(sys.argv) < 2:
        sys.exit(__doc__)
    q = " ".join(sys.argv[1:])
    h = alib(q)
    n = len(re.findall(r'>\s*Купить\s*<', h))
    print(f"listings: {n}")
    # each listing: text before 'Цена: N руб.' within the same row block
    for m in re.finditer(r'(.{150,420}?)\s*\(До заказа[^)]*\)\s*Цена:\s*(\d+)\s*руб', h, re.S):
        raw = m.group(1)
        # cut back to the category row boundary
        raw = raw[raw.rfind('</td>') + 5:]
        t = re.sub(r'<[^>]+>', ' ', raw)
        t = re.sub(r'&nbsp;', ' ', t)
        t = re.sub(r'\s+', ' ', t).strip()
        print(f"- {t}  [price {m.group(2)} руб]")
        print()
    time.sleep(2)

if __name__ == "__main__":
    main()