const modulePath = './13-douyinInsightManager';
const transcriptionEnvNames = [
  'TRANSCRIPTION_VOC_TOKEN',
  'VOICE_TOKEN',
  'OPENCLAW_VOC_TOKEN',
  'VOC_TOKEN',
  'VOC_SOCIAL_TOKEN',
];
const originalNodeEnv = process.env.NODE_ENV;
const originalTranscriptionEnv = Object.fromEntries(transcriptionEnvNames.map(name => [name, process.env[name]]));

function loadHelpers(env = {}) {
  process.env.NODE_ENV = 'test';
  transcriptionEnvNames.forEach(name => {
    delete process.env[name];
  });
  Object.entries(env).forEach(([key, value]) => {
    process.env[key] = value;
  });
  delete require.cache[require.resolve(modulePath)];
  return require(modulePath).__test;
}

describe('douyinInsightManager transcript helpers', () => {
  afterAll(() => {
    process.env.NODE_ENV = originalNodeEnv;
    transcriptionEnvNames.forEach(name => {
      if (originalTranscriptionEnv[name] === undefined) {
        delete process.env[name];
      } else {
        process.env[name] = originalTranscriptionEnv[name];
      }
    });
    delete require.cache[require.resolve(modulePath)];
  });

  it('prefers Douyin video audio candidates before music fallback', () => {
    const helpers = loadHelpers();
    const payload = {
      data: {
        aweme_detail: {
          aweme_id: '7636915997076770089',
          video: {
            duration: 380,
            dynamic_audio_list: [
              {
                url_list: ['https://sf6-cdn-tos.douyinstatic.com/obj/ies-music/dynamic-audio.m4a'],
                data_size: 1200,
                bit_rate: 64000,
              },
            ],
            play_addr: {
              url_list: ['https://v3-web.douyinvod.com/aweme/v1/play/video.mp4?mime_type=video_mp4'],
            },
          },
          music: {
            play_url: {
              url_list: ['https://sf6-cdn-tos.douyinstatic.com/obj/ies-music/music-fallback.mp3'],
            },
          },
        },
      },
    };

    const detail = helpers.findAwemeDetail(payload);
    const selected = helpers.selectMediaCandidate(detail, 'audio');

    expect(selected.url).toContain('dynamic-audio.m4a');
    expect(selected.kind).toBe('audio');
    expect(selected.keyPath).toBe('video.dynamic_audio_list.0.url_list');
    expect(selected.durationMs).toBe(0);
    expect(helpers.durationFromDetail(detail)).toBe(380000);
  });

  it('decodes base64 encoded media urls from Douyin payloads', () => {
    const helpers = loadHelpers();
    const encoded = Buffer.from('https://v3-web.douyinvod.com/aweme/v1/play/video.mp4?mime_type=video_mp4').toString('base64');

    expect(helpers.decodeMaybeBase64Url(encoded)).toContain('/aweme/v1/play/video.mp4');
  });

  it('uses current Parse session token for transcription gateway auth', () => {
    const helpers = loadHelpers({ TRANSCRIPTION_VOC_TOKEN: 'global-token' });

    expect(helpers.transcriptionGatewayToken({ sessionToken: 'r:current-user-session' })).toBe('r:current-user-session');
    expect(helpers.transcriptTokenSource('r:current-user-session')).toBe('current_user_sessionToken');
  });

  it('can fall back to a configured transcription gateway token for diagnostics or legacy callers', () => {
    const helpers = loadHelpers({ TRANSCRIPTION_VOC_TOKEN: 'gateway-token' });

    expect(helpers.transcriptionGatewayToken()).toBe('gateway-token');
    expect(helpers.transcriptTokenSource('gateway-token')).toBe('TRANSCRIPTION_VOC_TOKEN');
  });

  it('reports no gateway token when neither session nor env token is available', () => {
    const helpers = loadHelpers();

    expect(helpers.transcriptionGatewayToken()).toBe('');
    expect(helpers.transcriptTokenSource('')).toBe('');
  });

  it('formats gateway unauthorized responses as operator-readable token errors', () => {
    const helpers = loadHelpers();

    expect(helpers.readGatewayError({ type: 'unauthorized' })).toContain('转写网关鉴权失败');
  });
});