"""Shared inventory of usable, individual Persp files."""
from pathlib import Path


def present_rubric_labels(root: Path, labels: list[str]) -> list[str]:
    present = []
    for label in labels:
        path = root / 'Persp' / label.replace('/', '_')
        if not path.is_file():
            continue
        try:
            content = path.read_text(encoding='utf-8').strip()
        except UnicodeError:
            continue
        lines = content.split('\n', 1)
        body = lines[1].strip() if lines[0].strip() == label and len(lines) > 1 else content
        if body and body != label and not any(
            (ord(char) < 32 and char != '\n') or ord(char) == 127 for char in content
        ):
            present.append(label)
    return present