// Agent-turn requests are held open by the backend for the whole turn
// (POST /messages returns only after the agent finishes), and production p99
// is ~17 minutes. base44-mobile's Wix engine swizzles RCTNetworking and
// replaces a request timeout of 0 (what React Native's fetch always sends)
// with a hard 30s cap, so most sends died with WixFetchError. An explicit
// non-zero XMLHttpRequest timeout is preserved by the engine, which is why
// this transport exists instead of fetch.
export const SUPERAGENT_REQUEST_TIMEOUT_MS = 30 * 60 * 1000;

export interface XhrResponse {
  ok: boolean;
  status: number;
  json(): Promise<unknown>;
}

export interface XhrFetchInit {
  method: string;
  headers?: Record<string, string>;
  body?: string;
  timeoutMs?: number;
}

export function xhrFetch(url: string, init: XhrFetchInit): Promise<XhrResponse> {
  return new Promise((resolve, reject) => {
    const xhr = new XMLHttpRequest();
    xhr.open(init.method, url);
    xhr.timeout = init.timeoutMs ?? SUPERAGENT_REQUEST_TIMEOUT_MS;
    for (const [name, value] of Object.entries(init.headers ?? {})) {
      xhr.setRequestHeader(name, value);
    }
    xhr.onload = () => {
      resolve({
        ok: xhr.status >= 200 && xhr.status < 300,
        status: xhr.status,
        json: () => Promise.resolve(JSON.parse(xhr.responseText)),
      });
    };
    xhr.onerror = (error) => {
      console.error('Superagent request failed', error);
      reject(error);
    };
    xhr.ontimeout = () => reject(new Error('The request timed out. The agent may still be working — check the conversation again in a moment.'));
    xhr.send(init.body);
  });
}