import {expect, test} from 'vitest';

import Components from '@/ecs/components/index.js';
import Ecs from '@/ecs/ecs.js';

import Emitter from './emitter.js';

test('emits particles at once', async () => {
  const ecs = new Ecs({
    Components,
  });
  const emitter = new Emitter(ecs);
  const stream = emitter.emit({
    count: 5,
    frequency: 0,
    entity: {},
  });
  expect(await stream.scan((r) => r + 1, 0).toPromise()).to.equal(5);
});

test('emits particles over time', async () => {
  const ecs = new Ecs({
    Components,
  });
  const emitter = new Emitter(ecs);
  const stream = emitter.emit({
    count: 2,
    frequency: 0.1,
  });
  const current = stream.toProperty();
  expect(await new Promise((resolve) => {
    current.onValue(resolve);
  }))
    .to.deep.include({id: 1});
  expect(Array.from(ecs.$$detached))
    .to.deep.equal([2]);
  emitter.tick(0.06);
  expect(await new Promise((resolve) => {
    current.onValue(resolve);
  }))
    .to.deep.include({id: 1});
  emitter.tick(0.06);
  await new Promise((resolve) => setTimeout(resolve, 0));
  expect(await new Promise((resolve) => {
    current.onValue(resolve);
  }))
    .to.deep.include({id: 2});
  expect(Array.from(ecs.$$detached))
    .to.deep.equal([]);
});