import type {VideoTexture} from 'three';
import {describe, expect, it} from 'vitest';

import {VideoStream} from './VideoStream';

function createReadyStateVideoStream() {
  const stream = new VideoStream();
  let readyState = 0;

  Object.defineProperty(stream.video, 'readyState', {
    configurable: true,
    get: () => readyState,
  });
  Object.defineProperty(stream.video, 'HAVE_CURRENT_DATA', {
    configurable: true,
    value: 2,
  });

  return {
    stream,
    setReadyState: (nextReadyState: number) => {
      readyState = nextReadyState;
    },
  };
}

describe('VideoStream', () => {
  it('does not mark the texture dirty before the video has current data', () => {
    const {stream, setReadyState} = createReadyStateVideoStream();
    const texture = stream.texture as VideoTexture & {update: () => void};
    const initialVersion = texture.version;

    setReadyState(1);
    texture.update();

    expect(texture.version).toBe(initialVersion);
  });

  it('marks the texture dirty when the video has current data', () => {
    const {stream, setReadyState} = createReadyStateVideoStream();
    const texture = stream.texture as VideoTexture & {update: () => void};
    const initialVersion = texture.version;

    setReadyState(2);
    texture.update();

    expect(texture.version).toBeGreaterThan(initialVersion);
  });
});