'use strict';
const test = require('node:test'), assert = require('node:assert/strict');
const { Monitor } = require('../monitor');
test('Sentinel does not disturb progressing or deliberately paused jobs', async () => {
  let now = 0, recoveries = 0;
  const monitor = new Monitor({ now: () => now, stallMs: 100 });
  const state = { paused: false, active: [{ source: 'a', current: { id: 'job', title: 'Manga' }, job: { completed: 0, current: { downloadedPages: 1 } } }], queue: [] };
  const recover = async () => { recoveries++; return { changed: true }; };
  await monitor.observe({ ok: true }, state, recover);
  now = 500000; state.active[0].job.current.downloadedPages = 2;
  await monitor.observe({ ok: true }, state, recover);
  now = 1000000; state.paused = true;
  await monitor.observe({ ok: true }, state, recover);
  assert.equal(recoveries, 0);
  state.paused = false; await monitor.observe({ ok: true }, state, recover); await monitor.observe({ ok: true }, state, recover);
  assert.equal(recoveries, 1);
  state.active[0].job.completed = 1; await monitor.observe({ ok: true }, state, recover);
  assert.equal(monitor.incidents.find(i => i.key === 'stall:job').state, 'resolved');
});
test('Sentinel reports service failures without restart loops and resolves recovery', async () => {
  const monitor = new Monitor();
  await monitor.observe(null, null); await monitor.observe(null, null);
  assert.equal(monitor.incidents.length, 2);
  await monitor.observe({ ok: true }, { active: [], queue: [], paused: false });
  assert.equal(monitor.state.status, 'healthy'); assert.ok(monitor.incidents.every(i => i.state === 'resolved'));
});

test('missing checkpoint does not trigger a false stall recovery', async () => {
  let now = 0, recoveries = 0;
  const monitor = new Monitor({ now: () => now, stallMs: 100 });
  const state = { paused: false, active: [{ source: 'mangapill', current: { id: 'job', title: 'Manga' }, job: null }], queue: [] };
  for (const advance of [0, 1000000, 2000000]) {
    now = advance;
    await monitor.observe({ ok: true }, state, async () => { recoveries++; return { changed: true }; });
  }
  assert.equal(recoveries, 0);
  assert.equal(monitor.incidents.some(item => item.key === 'stall:job'), false);
});