from __future__ import annotations

import re
import unicodedata
from pathlib import Path
from typing import Iterable


def sanitize_filename(name: str) -> str:
    normalized = unicodedata.normalize("NFKD", name)
    ascii_text = normalized.encode("ASCII", "ignore").decode()
    ascii_text = ascii_text.lower()
    ascii_text = ascii_text.replace(" ", "_")
    ascii_text = re.sub(r"[^a-z0-9_\-\.]", "", ascii_text)
    ascii_text = re.sub(r"_+", "_", ascii_text)
    return ascii_text.strip("_") or "video"


def ensure_workspace(root: Path, folder_name: str) -> Path:
    workspace = root / folder_name
    workspace.mkdir(parents=True, exist_ok=True)
    return workspace


def remove_paths(paths: Iterable[Path]) -> None:
    for path in paths:
        if not path.exists():
            continue
        if path.is_file() or path.is_symlink():
            path.unlink(missing_ok=True)
        else:
            for child in sorted(path.rglob("*"), reverse=True):
                if child.is_file() or child.is_symlink():
                    child.unlink(missing_ok=True)
                elif child.is_dir():
                    child.rmdir()
            path.rmdir()