"""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-a-licious: el endpoint de texto fiable de OFF (el legacy cgi/search.pl
# devuelve 503 a IPs de datacenter).
_SEARCH = "https://search.openfoodfacts.org/search"


def search(q: str, limit: int = 12) -> list[dict]:
    """Devuelve alimentos normalizados: {name, kcal_100g, off_id, barcode}."""
    try:
        resp = httpx.get(
            _SEARCH,
            params={
                "q": q,
                "page_size": limit,
                "fields": "code,product_name,nutriments",
            },
            timeout=6.0,
            headers={"User-Agent": "autoayuno/1.0 (self-hosted; carlos)"},
        )
        if resp.status_code != 200:
            return []
        out = []
        for h in resp.json().get("hits", []):
            name = (h.get("product_name") or "").replace("\n", " ").strip()
            kcal = (h.get("nutriments") or {}).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": h.get("code"),
                "barcode": h.get("code"),
            })
        return out
    except Exception:
        return []