#!/usr/bin/env python3
"""Prepend a book-page.css link to every HTML file in html2/."""

from pathlib import Path

CSS_LINK = '<link rel="stylesheet" href="book-page.css">\n'
HTML2_DIR = Path(__file__).parent.parent / "html2"


def main():
    files = sorted(HTML2_DIR.glob("*.html"), key=lambda p: int(p.stem) if p.stem.isdigit() else -1)
    for path in files:
        content = path.read_text(encoding="utf-8")
        if CSS_LINK.strip() not in content:
            path.write_text(CSS_LINK + content, encoding="utf-8")
            print(f"updated {path.name}")
        else:
            print(f"skipped {path.name} (already has link)")


if __name__ == "__main__":
    main()
