import { AudioSegmenter } from '@/features/voice/segmenter';

describe('AudioSegmenter', () => {
  beforeEach(() => {
    jest.useFakeTimers();
  });

  afterEach(() => {
    jest.useRealTimers();
  });

  test('fires segment callbacks at fixed intervals', () => {
    const onSegment = jest.fn();
    const segmenter = new AudioSegmenter(onSegment, { fixedDurationMs: 1000 });

    segmenter.start();

    jest.advanceTimersByTime(1000);
    expect(onSegment).toHaveBeenCalledWith(0);

    jest.advanceTimersByTime(1000);
    expect(onSegment).toHaveBeenCalledWith(1);

    jest.advanceTimersByTime(1000);
    expect(onSegment).toHaveBeenCalledWith(2);

    expect(onSegment).toHaveBeenCalledTimes(3);

    segmenter.stop();
  });

  test('stop returns the final segment index', () => {
    const onSegment = jest.fn();
    const segmenter = new AudioSegmenter(onSegment, { fixedDurationMs: 500 });

    segmenter.start();
    jest.advanceTimersByTime(1500);

    const finalIndex = segmenter.stop();
    expect(finalIndex).toBe(3);
  });

  test('does not fire after stop', () => {
    const onSegment = jest.fn();
    const segmenter = new AudioSegmenter(onSegment, { fixedDurationMs: 100 });

    segmenter.start();
    jest.advanceTimersByTime(250);
    segmenter.stop();

    const callCount = onSegment.mock.calls.length;
    jest.advanceTimersByTime(500);

    expect(onSegment).toHaveBeenCalledTimes(callCount);
  });

  test('uses default 15s interval when no config provided', () => {
    const onSegment = jest.fn();
    const segmenter = new AudioSegmenter(onSegment);

    segmenter.start();
    jest.advanceTimersByTime(14999);
    expect(onSegment).not.toHaveBeenCalled();

    jest.advanceTimersByTime(1);
    expect(onSegment).toHaveBeenCalledTimes(1);

    segmenter.stop();
  });
});