import { beforeEach, describe, expect, it, vi } from 'vitest';
import { act, render, screen, waitFor, within } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { QueryClientProvider } from '@tanstack/react-query';

vi.mock('livekit-client', async () => {
  const fake = await import('./fakeLiveKit');
  return {
    Room: fake.FakeRoom,
    RoomEvent: fake.RoomEvent,
    ConnectionQuality: fake.ConnectionQuality,
    Track: fake.Track,
    VideoQuality: fake.VideoQuality,
  };
});

import { FakeRoom, VideoQuality } from './fakeLiveKit';
import {
  createTestQueryClient,
  installFetch,
  json,
  makeUser,
  resetStores,
  type FetchRoute,
} from './helpers';
import { makeVoiceState, voiceRoutes } from './voiceRoutes';
import type { Channel } from '@/api/types';
import { VoiceRoomPanel } from '@/components/voice/VoiceRoomPanel';
import { setQueryClient } from '@/lib/queryClient';
import { resetSoundboardEngine } from '@/lib/soundboard';
import { useSessionStore } from '@/stores/session';
import { useVoiceStore } from '@/stores/voice';
import { useVoiceConnectionStore } from '@/stores/voiceConnection';

/**
 * Статистика своей публикации, выбор качества видео и пресетов демонстрации
 * экрана (AGENT.md 7.14). Значения берутся из отчёта WebRTC подставного SDK,
 * опрос идёт раз в секунду и останавливается при закрытии попапа.
 */

const voiceChannel: Channel = { id: 'c-voice', name: 'Голосовая', type: 'voice', position: 0 };

/** Отчёт WebRTC: кодек, отправка видео, обратный канал (RTT, потери). */
function statsReport(bytesSent: number, timestamp: number): [string, unknown][] {
  return [
    ['codec-1', { type: 'codec', id: 'codec-1', mimeType: 'video/VP8' }],
    [
      'out-1',
      {
        type: 'outbound-rtp',
        kind: 'video',
        frameWidth: 1920,
        frameHeight: 1080,
        framesPerSecond: 30,
        bytesSent,
        packetsSent: 197,
        codecId: 'codec-1',
        timestamp,
      },
    ],
    [
      'in-1',
      {
        type: 'remote-inbound-rtp',
        kind: 'video',
        roundTripTime: 0.042,
        jitter: 0.003,
        packetsLost: 3,
      },
    ],
  ];
}

/** Рендер панели комнаты с поднятой голосовой сессией и включённой камерой. */
async function bootPanel() {
  const queryClient = createTestQueryClient();
  setQueryClient(queryClient);
  resetStores();
  resetSoundboardEngine();

  useSessionStore.setState({
    user: {
      id: 'user-1',
      username: 'alice',
      display_name: 'Alice',
      is_instance_admin: false,
      badges: [],
    },
    guilds: [
      {
        id: 'g-1',
        name: 'Сервер',
        owner_id: 'user-1',
        is_main: true,
        member_count: 1,
        my_role_ids: [],
        my_permissions: ['VIEW_GUILD'],
        channels: [voiceChannel],
        emojis: [],
        sounds: [],
      },
    ],
    voiceStates: { 'g-1': [makeVoiceState({ user_id: 'user-1', channel_id: 'c-voice' })] },
  });

  const voice = voiceRoutes({
    channelIds: ['c-voice'],
    states: [makeVoiceState({ user_id: 'user-1', channel_id: 'c-voice' })],
  });
  installFetch([
    { match: '/api/v1/users/@me', response: () => json({ user: makeUser() }) },
    { match: '/api/v1/meta', response: () => json({ features: { voice_enabled: true } }) },
    { match: '/api/v1/guilds/g-1/members', response: () => json({ members: [] }) },
    { match: '/api/v1/guilds/g-1/roles', response: () => json({ roles: [] }) },
    ...voice.routes,
  ] as FetchRoute[]);

  render(
    <QueryClientProvider client={queryClient}>
      <VoiceRoomPanel guildId="g-1" channel={voiceChannel} />
    </QueryClientProvider>,
  );

  await act(async () => {
    await useVoiceConnectionStore.getState().join('g-1', 'c-voice');
    await useVoiceConnectionStore.getState().setCameraEnabled(true);
  });

  return { room: FakeRoom.latest() };
}

beforeEach(() => {
  FakeRoom.reset();
});

describe('статистика соединения', () => {
  it('показывает данные SDK и обновляет их раз в секунду', async () => {
    const { room } = await bootPanel();
    room.setStats(statsReport(0, 1_000));

    await userEvent.click(await screen.findByTestId('voice-stats-button'));
    const panel = await screen.findByTestId('voice-stats-panel');

    // Разрешение, fps и кодек приходят из отчёта; битрейт — по двум замерам.
    expect(panel).toHaveTextContent('1920×1080');
    expect(panel).toHaveTextContent('30 fps');
    expect(panel).toHaveTextContent('VP8');
    expect(panel).toHaveTextContent('42 мс');
    expect(panel).toHaveTextContent('3 мс');
    expect(panel).toHaveTextContent('1.5%');

    room.setStats(statsReport(125_000, 2_000));
    await waitFor(
      () => {
        expect(screen.getByTestId('voice-stats-panel')).toHaveTextContent('1000 кбит/с');
      },
      { timeout: 2_500 },
    );
  });

  it('показывает прочерк, когда SDK не отдал поле', async () => {
    const { room } = await bootPanel();
    room.setStats([]);

    await userEvent.click(await screen.findByTestId('voice-stats-button'));
    const panel = await screen.findByTestId('voice-stats-panel');

    expect(within(panel).getAllByText('—').length).toBeGreaterThanOrEqual(5);
  });

  it('останавливает опрос при закрытии попапа', async () => {
    const { room } = await bootPanel();
    room.setStats(statsReport(0, 1_000));

    await userEvent.click(await screen.findByTestId('voice-stats-button'));
    await screen.findByTestId('voice-stats-panel');
    const track = room.localParticipant.getTrackPublication('camera')?.track;
    const before = track?.statsRequests ?? 0;
    expect(before).toBeGreaterThan(0);

    await userEvent.click(screen.getByTestId('voice-stats-button'));
    await waitFor(() => {
      expect(screen.queryByTestId('voice-stats-panel')).toBeNull();
    });

    // Ждём больше периода опроса: счётчик обращений к SDK не должен расти.
    await new Promise((resolve) => setTimeout(resolve, 1_200));
    expect(track?.statsRequests).toBe(before);
  });

  it('передаёт SDK выбранное качество публикации', async () => {
    const { room } = await bootPanel();

    await userEvent.click(await screen.findByTestId('voice-quality-button'));
    await userEvent.click(await screen.findByTestId('voice-publish-quality-low'));

    await waitFor(() => {
      expect(useVoiceStore.getState().videoQuality).toBe('low');
    });
    const track = room.localParticipant.getTrackPublication('camera')?.track;
    expect(track?.publishingQuality).toContain(VideoQuality.LOW);
  });

  it('публикует экран с выбранным разрешением и fps', async () => {
    const { room } = await bootPanel();

    await userEvent.click(await screen.findByTestId('voice-screen-button'));
    await userEvent.click(await screen.findByTestId('voice-screen-preset-720p30'));

    await waitFor(() => {
      expect(useVoiceConnectionStore.getState().screenEnabled).toBe(true);
    });
    expect(useVoiceStore.getState().screenSharePreset).toBe('720p30');
    expect(room.localParticipant.screenOptions.at(-1)).toEqual({
      enabled: true,
      options: { resolution: { width: 1280, height: 720, frameRate: 30 } },
    });
  });
});