"""Cliente de Open Food Facts: busca productos y los normaliza a la forma de
alimento de la app. Tolerante a fallos: devuelve [] si algo va mal."""
import httpx

_SEARCH = "https://world.openfoodfacts.org/cgi/search.pl"


def search(q: str, limit: int = 12) -> list[dict]:
    """Devuelve alimentos normalizados: {name, kcal_100g, off_id, barcode}."""
    try:
        resp = httpx.get(
            _SEARCH,
            params={
                "search_terms": q,
                "search_simple": 1,
                "action": "process",
                "json": 1,
                "page_size": limit,
                "fields": "product_name,nutriments,code",
            },
            timeout=6.0,
            headers={"User-Agent": "autoayuno/1.0 (self-hosted)"},
        )
        if resp.status_code != 200:
            return []
        out = []
        for p in resp.json().get("products", []):
            name = (p.get("product_name") or "").strip()
            kcal = p.get("nutriments", {}).get("energy-kcal_100g")
            if not name or kcal is None:
                continue
            try:
                kcal = float(kcal)
            except (TypeError, ValueError):
                continue
            if kcal <= 0:
                continue
            out.append({
                "name": name[:120],
                "kcal_100g": kcal,
                "off_id": p.get("code"),
                "barcode": p.get("code"),
            })
        return out
    except Exception:
        return []