import test from 'node:test';
import assert from 'node:assert/strict';
import { world } from './world.mjs';

async function fixture(t) {
  let now = Date.now();
  const w = await world(t, { fake: { now: () => now }, adapter: { clock: () => now } });
  await w.adapter.start('demo');
  const owner = await w.ui('POST', `/projects/${w.project}/tasks`, { title: 'watched' });
  assert.equal(owner.status, 201);
  await w.adapter.reconcile('demo');
  assert.equal(w.store.get('SELECT count(*) n FROM task_comment_cursors').n, 0);
  const events = () => w.events('task.changed.external').filter(e => e.body.comments);
  return { w, events, advance: () => { now += 3 * 3600000; } };
}

test('stopped bus resumes an empty task cursor after a long outage, exactly once', async t => {
  const { w, events, advance } = await fixture(t);
  await w.stop();
  advance();
  assert.equal((await w.ui('POST', '/tasks/1/comments', { comment: 'while bus stopped' })).status, 201);
  advance();
  await w.restart();
  assert.equal(events().length, 1);
  assert.equal(events()[0].body.comments, 1);
  await w.adapter.tick('demo');
  await w.adapter.reconcile('demo');
  assert.equal(events().length, 1);
});

test('persisted IDs avoid replay, exclude bots and bound rows to observed new comments', async t => {
  const { w, events, advance } = await fixture(t);
  await w.ui('POST', '/tasks/1/comments', { comment: 'before restart' });
  await w.adapter.reconcile('demo');
  assert.equal(events().length, 1);
  const rows = () => w.store.get('SELECT count(*) n FROM task_comment_cursors').n;
  assert.equal(rows(), 1);
  await w.adapter.reconcile('demo');
  await w.adapter.tick('demo');
  assert.equal(rows(), 1);
  await w.stop();
  advance();
  const r = await w.fake.fetch('http://vikunja.test/api/v2/tasks/1/comments', {
    method: 'POST', headers: { authorization: 'Bearer ' + w.tokens.coder, 'content-type': 'application/json' },
    body: JSON.stringify({ comment: 'bot while stopped' }),
  });
  assert.equal(r.status, 201);
  await w.ui('POST', '/tasks/1/comments', { comment: 'human while stopped' });
  advance();
  await w.restart();
  assert.equal(events().length, 2);
  assert.equal(events()[1].body.comments, 1);
  assert.equal(rows(), 2);
  await w.stop();
  await w.restart();
  await w.adapter.tick('demo');
  assert.equal(events().length, 2);
  assert.equal(rows(), 2);
});

test('commit followed by crash before cache advance neither loses nor duplicates a comment', async t => {
  const { w, events } = await fixture(t);
  await w.ui('POST', '/tasks/1/comments', { comment: 'committed before crash' });
  const record = w.broker.recordTask.bind(w.broker);
  w.broker.recordTask = args => { record(args); throw Error('simulated crash after commit'); };
  await assert.rejects(w.adapter.reconcile('demo'), /simulated crash/);
  assert.equal(events().length, 1);
  await w.stop();
  await w.restart();
  assert.equal(events().length, 1);
  await w.adapter.tick('demo');
  assert.equal(events().length, 1);
});

test('failed event insert rolls back cursor and a retry still emits the comment once', async t => {
  const { w, events } = await fixture(t);
  await w.ui('POST', '/tasks/1/comments', { comment: 'retry me' });
  w.store.run("CREATE TRIGGER fixture_fail BEFORE INSERT ON events WHEN NEW.kind='task.changed.external' BEGIN SELECT RAISE(ABORT,'fixture failure'); END");
  await assert.rejects(w.adapter.reconcile('demo'), /fixture failure/);
  w.store.run('DROP TRIGGER fixture_fail');
  await w.adapter.reconcile('demo');
  assert.equal(events().length, 1);
  assert.equal(events()[0].body.comments, 1);
});

// Removing the epoch margin loses a tracker comment thirty seconds behind host time.
test('initial cursor accepts a comment within the stated one-minute clock skew margin', async t => {
  let trackerNow = Date.now() - 30000;
  const skewed = await world(t, { fake: { now: () => trackerNow } });
  await skewed.adapter.start('demo');
  await skewed.ui('POST', `/projects/${skewed.project}/tasks`, { title: 'clock skew' });
  await skewed.adapter.reconcile('demo');
  await skewed.ui('POST', '/tasks/1/comments', { comment: 'thirty seconds behind' });
  await skewed.adapter.reconcile('demo');
  const found = skewed.events('task.changed.external').filter(e => e.body.comments);
  assert.equal(found.length, 1);
  assert.equal(found[0].body.comments, 1);
  await skewed.adapter.reconcile('demo');
  assert.equal(skewed.events('task.changed.external').filter(e => e.body.comments).length, 1);
});