(function() {
  const origFetch = window.fetch;
  window.fetch = async function(input, init = {}) {
    const url = typeof input === "string" ? input : input.url;
    if (url.endsWith("getgeoidx")) {
      let body = init.body || null;
      if (body instanceof ArrayBuffer) {
        body = new TextDecoder().decode(new Uint8Array(body));
      } else if (body instanceof Blob) {
        body = await new Response(body).text();
      } else if (body != null && typeof body !== "string") {
        try { body = JSON.stringify(body); } catch(e) { body = String(body); }
      }
      window.postMessage({ type: "ZMS_CAPTURE", url, body }, "*");
    }
    return origFetch.apply(this, arguments);
  };

  // patch XMLHttpRequest to catch getgeoidx
  const origOpen = XMLHttpRequest.prototype.open;
  const origSend = XMLHttpRequest.prototype.send;
  XMLHttpRequest.prototype.open = function(method, url, ...rest) {
    this._zms_url = url;
    return origOpen.call(this, method, url, ...rest);
  };
  XMLHttpRequest.prototype.send = function(body) {
    if (this._zms_url && this._zms_url.endsWith("getgeoidx")) {
      let captured = body;
      if (body instanceof ArrayBuffer) {
        captured = new TextDecoder().decode(new Uint8Array(body));
      } else if (body != null && typeof body !== "string") {
        try { captured = JSON.stringify(body); } catch(e) { captured = String(body); }
      }
      window.postMessage({ type: "ZMS_CAPTURE", url: this._zms_url, body: captured }, "*");
    }
    return origSend.call(this, body);
  };
})();