import subprocess
import sys
import pdfplumber


def ensure_spacy_model(name: str) -> None:
    """Download spacy model if not already installed."""
    try:
        import spacy
        spacy.load(name)
    except OSError:
        subprocess.run([sys.executable, "-m", "spacy", "download", name], check=True)


def extract_pdf_text(pdf_file) -> str:
    """Extract plain text from all pages of a PDF file."""
    with pdfplumber.open(pdf_file.name) as pdf:
        pages = [page.extract_text() or "" for page in pdf.pages]
    return "\n".join(pages)