"""Document standardization for PDF input."""

from __future__ import annotations

from pathlib import Path

import fitz


def open_document(path: Path) -> fitz.Document:
    """Open and normalize a PDF for downstream layout processing."""
    doc = fitz.open(path)
    if doc.is_encrypted and not doc.authenticate(""):
        doc.close()
        raise ValueError(f"Encrypted PDF cannot be opened: {path.name}")
    return doc