import { ILogger } from '@node-dlc/logger';
import { expect } from 'chai';

import {
  GossipSyncWatcher,
  GossipSyncWatcherState,
} from '../../lib/gossip/GossipSyncWatcher';
import { ChannelAnnouncementMessage } from '../../lib/messages/ChannelAnnouncementMessage';
import { createFakeLogger, wait } from '../_test-utils';

describe('GossipSyncWatcher', () => {
  let logger: ILogger;
  let sut: GossipSyncWatcher;
  let promise: Promise<void>;

  beforeEach(() => {
    logger = createFakeLogger();
    sut = new GossipSyncWatcher(logger);
    sut.completeAfterMs = 50;
  });

  it('resolves after gossip inactivity', async () => {
    await sut.watch();
  });

  it('stays active', (done) => {
    promise = sut.watch();
    Promise.resolve()
      .then(() => wait(25))
      .then(() => sut.onGossipMessage(new ChannelAnnouncementMessage()))
      .then(() => wait(25))
      .then(() => sut.onGossipMessage(new ChannelAnnouncementMessage()))
      .then(() => wait(25))
      .then(() => sut.onGossipMessage(new ChannelAnnouncementMessage()))
      .then(() => wait(25))
      .then(() => sut.onGossipMessage(new ChannelAnnouncementMessage()))
      .then(() => wait(200))
      .then(() => promise)
      .then(() => {
        expect(sut.messageCounter).to.equal(4);
        done();
      })
      .catch(done);
  });

  it('cancels immediately', async () => {
    sut.completeAfterMs = 5000;
    promise = sut.watch();
    sut.cancel();
    await promise;
  });

  it("doesn't reset timer unless it has started", () => {
    sut.onGossipMessage(new ChannelAnnouncementMessage());
    expect((sut as any)._timeoutHandle).to.be.undefined;
  });

  it('cancels if not started', () => {
    sut.cancel();
    expect(sut.state === GossipSyncWatcherState.Canceled);
  });
});