// Exercise the actual browser request function with a deterministic fake clock.
'use strict';
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const vm = require('node:vm');
const source = fs.readFileSync(path.join(__dirname, '../js/app.js'), 'utf8');
const start = source.indexOf('  var ANALYZE_TIMEOUT_MS =');
const end = source.indexOf('  /* ─── SkinScore viewModel', start);
assert(start >= 0 && end > start);
function setup() {
  let timer, complete, signal, result;
  const ctx = { IS_MOCK: false, camSeq: 1, AbortController, CaptureQuality: require('../js/capture-quality'), captureDiagnostics: [],
    setTimeout(fn, delay) { timer = { fn, delay }; return 1; },
    clearTimeout() { timer = null; },
    fetch(url, options) {
      assert.equal(url, 'api/skin-analyze');
      signal = options.signal;
      return new Promise((resolve, reject) => {
        complete = () => resolve({ json: async () => ({ ok: true, report_saved: true }) });
        signal.addEventListener('abort', () => { const e = new Error('aborted'); e.name = 'AbortError'; reject(e); });
      });
    }
  };
  vm.createContext(ctx);
  vm.runInContext(source.slice(start, end), ctx);
  ctx.requestAnalyze(['front', 'left', 'right'], 1, {}, (...args) => { result = args; });
  return { ctx, get timer() { return timer; }, get signal() { return signal; },
    get result() { return result; }, finish() { complete(); } };
}
const flush = () => new Promise(resolve => setImmediate(resolve));
(async () => {
  const delayed = setup();
  assert.equal(delayed.timer.delay, 150000);
  assert(delayed.timer.delay > 60000 * 2 + 4000, 'Allow both backend attempts plus retry wait');
  delayed.finish();
  await flush();
  assert.equal(delayed.result[0], null);
  assert.equal(delayed.result[1].report_saved, true);
  assert.equal(delayed.timer, null);
  assert.equal(delayed.signal.aborted, false);
  const expired = setup();
  expired.timer.fn();
  await flush();
  assert(expired.signal.aborted);
  assert.match(expired.result[0], /检测服务开小差/);
  const canceled = setup();
  canceled.ctx.camSeq++;
  canceled.finish();
  await flush();
  assert.equal(canceled.result, undefined);
  assert.equal(canceled.timer, null);
  console.log('PASS: frontend timeout covers backend retry budget; success, timeout, stale response, timer cleanup');
})().catch(e => { console.error(e); process.exitCode = 1; });