// elevation.js
async function getElevation(lat, lon) {
  console.log("OpenElevation request:", lat, lon);

  const url = `https://api.open-elevation.com/api/v1/lookup?locations=${lat},${lon}`;

  try {
    const res = await fetch(url);
    console.log("OpenElevation status:", res.status);

    const json = await res.json();
    console.log("OpenElevation response:", json);

    return json?.results?.[0]?.elevation ?? null;

  } catch (err) {
    console.warn("Errore OpenElevation:", err);
    return null;
  }
}

module.exports = { getElevation };