import assert from 'node:assert/strict';
import { test } from 'node:test';
import { install, server, settle } from './flow-helpers.mjs';

const ui = install();
const { startPolling, stopPolling, watchJobs } = await import('../../bindery/static/js/jobs.js');

test('polling adapts to work and visibility, retries failures, and stops after an in-flight request', async (t) => {
  t.mock.timers.enable({ apis: ['setTimeout'] });
  const api = server(t);
  const rendered = [];
  const unsubscribe = watchJobs({ render: (jobs) => rendered.push(jobs) });
  t.after(() => { unsubscribe(); stopPolling(); });
  let jobs = [];
  api.on('GET', 'jobs', () => jobs);
  startPolling();
  await settle();
  t.mock.timers.tick(9999);
  assert.equal(api.requests.length, 1);
  jobs = [{ id: 'job', status: 'running' }];
  t.mock.timers.tick(1);
  await settle();
  assert.equal(api.requests.length, 2);
  t.mock.timers.tick(1999);
  assert.equal(api.requests.length, 2);
  t.mock.timers.tick(1);
  await settle();
  assert.equal(api.requests.length, 3);
  document.hidden = true;
  ui.documentEvents.visibilitychange();
  assert.equal(api.requests.length, 3);
  t.mock.timers.tick(2000);
  await settle();
  t.mock.timers.tick(59999);
  assert.equal(api.requests.length, 4);
  t.mock.timers.tick(1);
  await settle();
  assert.equal(api.requests.length, 5);
  document.hidden = false;
  api.on('GET', 'jobs', () => { throw new Error('Connection lost'); });
  const previous = rendered.length;
  ui.documentEvents.visibilitychange();
  await settle();
  assert.equal(rendered.length, previous);
  jobs = [{ id: 'job', status: 'done' }];
  api.on('GET', 'jobs', () => jobs);
  t.mock.timers.tick(2000);
  await settle();
  assert.deepEqual(rendered.at(-1), jobs);
  let resolve;
  api.on('GET', 'jobs', () => new Promise((done) => { resolve = done; }));
  t.mock.timers.tick(10000);
  stopPolling();
  resolve([]);
  await settle();
  const total = api.requests.length;
  t.mock.timers.tick(60000);
  await settle();
  assert.equal(api.requests.length, total);
});