from __future__ import annotations
from typing import Dict, List
from bs4 import BeautifulSoup
from utils import normalize_text
from ..registry import extractor

@extractor
def ex_labels(soup: BeautifulSoup, url: str) -> Dict:
    """
    From:
      <ul class="cdz-product-labels">
        <li class="label-item new"><div class="label-content">NEW</div></li>
      </ul>
    Returns "labels": lower-cased union of class hints and visible text.
    """
    root = soup.select_one("ul.cdz-product-labels")
    if not root:
        return {}
    items: List[str] = []
    texts: List[str] = []

    for li in root.select("li.label-item"):
        for c in (li.get("class") or []):
            c = (c or "").strip()
            if c and c.lower() != "label-item" and c not in items:
                items.append(c)
        txt = normalize_text(li.get_text())
        if txt and txt not in texts:
            texts.append(txt)

    if not items and not texts:
        return {}
    union = []
    seen = set()
    for s in items + [t.lower() for t in texts]:
        key = (s or "").strip().lower()
        if key and key not in seen:
            seen.add(key)
            union.append(key)
    return {"labels": union}