import assert from "node:assert/strict";
import { test } from "node:test";
import { VoiceActivityDetector } from "../../src/voice_assistant/audio_gateway/web/vad.js";

test("detects speech start after minimum duration", () => {
  let starts = 0;

  const vad = new VoiceActivityDetector({
    minSpeechMs: 250,
    onSpeechStart: () => starts++,
  });

  vad.start();

  vad.process(0.04, 0);
  vad.process(0.04, 100);

  assert.equal(starts, 0);

  vad.process(0.04, 260);

  assert.equal(starts, 1);
});

test("detects speech end after silence", () => {
  let ends = 0;

  const vad = new VoiceActivityDetector({
    minSpeechMs: 100,
    silenceMs: 800,
    onSpeechEnd: () => ends++,
  });

  vad.start();

  vad.process(0.04, 0);
  vad.process(0.04, 120);
  vad.process(0.04, 300);

  vad.process(0.001, 600);
  vad.process(0.001, 1000);

  assert.equal(ends, 0);

  vad.process(0.001, 1101);

  assert.equal(ends, 1);
});

test("ignores short noise spikes", () => {
  let starts = 0;

  const vad = new VoiceActivityDetector({
    minSpeechMs: 250,
    onSpeechStart: () => starts++,
  });

  vad.start();

  vad.process(0.05, 0);
  vad.process(0.001, 80);
  vad.process(0.001, 300);

  assert.equal(starts, 0);
});

test("stop disables detection", () => {
  let starts = 0;

  const vad = new VoiceActivityDetector({
    minSpeechMs: 100,
    onSpeechStart: () => starts++,
  });

  vad.start();
  vad.stop();

  vad.process(0.05, 0);
  vad.process(0.05, 200);

  assert.equal(starts, 0);
});