import { describe, expect, it } from 'vitest';

import { DEFAULT_BARK_BATTLE_CONFIG } from '../../application/BarkBattleConfig';
import { BarkDetector } from '../BarkDetector';

describe('BarkDetector', () => {
  it('每个监测点只检测瞬时响度，超过阈值立即触发', () => {
    const detector = new BarkDetector({
      threshold: 0.45,
      minBarkGapMs: DEFAULT_BARK_BATTLE_CONFIG.minBarkGapMs,
    });

    expect(detector.acceptSample({ atMs: 0, volume: 0.2 })).toEqual([]);
    const events = detector.acceptSample({ atMs: 40, volume: 0.72 });

    expect(events).toHaveLength(1);
    expect(events[0]).toMatchObject({ side: 'player', atMs: 40, peakVolume: 0.72, durationMs: 0 });
  });

  it('持续噪音按冷却间隔触发，不需要等待响度回落', () => {
    const detector = new BarkDetector({
      threshold: 0.4,
      minBarkGapMs: 250,
    });

    const allEvents = [
      ...detector.acceptSample({ atMs: 0, volume: 0.7 }),
      ...detector.acceptSample({ atMs: 100, volume: 0.72 }),
      ...detector.acceptSample({ atMs: 200, volume: 0.73 }),
      ...detector.acceptSample({ atMs: 300, volume: 0.75 }),
      ...detector.acceptSample({ atMs: 500, volume: 0.2 }),
      ...detector.acceptSample({ atMs: 560, volume: 0.76 }),
    ];

    expect(allEvents.map((event) => event.atMs)).toEqual([0, 300, 560]);
  });

  it('低于阈值的背景噪音和冷却内峰值不计数，最短持续时长不再参与判断', () => {
    const detector = new BarkDetector({
      threshold: 0.5,
      minBarkGapMs: 300,
    });

    expect(detector.acceptSample({ atMs: 0, volume: 0.48 })).toEqual([]);
    expect(detector.acceptSample({ atMs: 20, volume: 0.9 })).toHaveLength(1);
    expect(detector.acceptSample({ atMs: 60, volume: 0.95 })).toEqual([]);

    expect(detector.acceptSample({ atMs: 320, volume: 0.88 })).toHaveLength(1);
    expect(detector.acceptSample({ atMs: 420, volume: 0.2 })).toEqual([]);
  });

  it('支持 100ms 级别间隔的快速连续有效叫声', () => {
    const detector = new BarkDetector({
      threshold: 0.5,
      minBarkGapMs: 100,
    });

    const allEvents = [
      ...detector.acceptSample({ atMs: 0, volume: 0.86 }),
      ...detector.acceptSample({ atMs: 60, volume: 0.9 }),
      ...detector.acceptSample({ atMs: 120, volume: 0.91 }),
      ...detector.acceptSample({ atMs: 180, volume: 0.92 }),
      ...detector.acceptSample({ atMs: 240, volume: 0.93 }),
    ];

    expect(allEvents).toHaveLength(3);
    expect(allEvents.map((event) => event.atMs)).toEqual([0, 120, 240]);
  });

  it('非有限音量会归零，超过 1 的音量会夹到 1', () => {
    const detector = new BarkDetector({
      threshold: 0.5,
      minBarkGapMs: 100,
    });

    expect(detector.acceptSample({ atMs: 0, volume: Number.NaN })).toEqual([]);
    expect(detector.acceptSample({ atMs: 120, volume: Number.POSITIVE_INFINITY })).toEqual([]);
    const events = detector.acceptSample({ atMs: 240, volume: 2 });

    expect(events).toHaveLength(1);
    expect(events[0]?.peakVolume).toBe(1);
  });
});