from pathlib import Path
import re
import os
import shutil

p = Path("")

books = list(p.glob('*.html'))

book_ids = {}

tot_books = 0
tot_frontmatter = 0
for book in books:
    if "book-" in book.stem:
        book_id = re.match(r'.*book-(.*)\)', book.stem).group(1)
        book_ids[book_id] = book_ids.get(book_id, []) + [book.stem]

        if "frontmatter" in book.stem:
            tot_frontmatter += 1


for key in book_ids.keys():
    os.mkdir(key)
    for book in book_ids[key]:
        shutil.move(book + ".html", key + "/" + book + ".html")