import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';

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

import { FakeRoom, RoomEvent } from './fakeLiveKit';
import {
  installFetch,
  makeReadySnapshot,
  recordedRequests,
  resetStores,
  type RecordedRequest,
} from './helpers';
import { fakeVoiceToken, makeVoiceState, voiceRoutes, type VoiceRoutes } from './voiceRoutes';
import { parseGatewaySnapshot } from '@/api/gateway';
import { dispatchGatewayEvent } from '@/stores/gateway';
import { useSessionStore } from '@/stores/session';
import { useVoiceStore } from '@/stores/voice';
import {
  SPEAKING_WARNING_INTERVAL_MS,
  SPEAKING_WARNING_VISIBLE_MS,
  TOKEN_REFRESH_MIN_DELAY_MS,
  useVoiceConnectionStore,
  VOICE_SESSION_EXPIRED_CODE,
} from '@/stores/voiceConnection';

const ALL_PERMISSIONS = [
  'VIEW_GUILD',
  'CONNECT_VOICE',
  'MUTE_MEMBERS',
  'DEAFEN_MEMBERS',
  'MOVE_MEMBERS',
];

/** Сессия: пользователь и сервер с двумя голосовыми комнатами. */
function seedSession(voiceStates: Parameters<typeof makeVoiceState>[0][] = []): void {
  const snapshot = parseGatewaySnapshot(
    makeReadySnapshot([
      {
        id: 'g-1',
        name: 'Сервер',
        my_permissions: ALL_PERMISSIONS,
        channels: [
          { id: 'c-1', name: 'общий' },
          { id: 'c-voice', name: 'Голосовая', type: 'voice' },
          { id: 'c-other', name: 'Вторая', type: 'voice' },
        ],
        voice_states: voiceStates,
      },
    ]),
  );
  if (snapshot === null) {
    throw new Error('снимок READY не разобрался');
  }
  useSessionStore.getState().applyReady(snapshot);
}

/** Ждёт выполнения цепочки промисов (в том числе под фейковыми таймерами). */
async function flush(times = 12): Promise<void> {
  for (let index = 0; index < times; index += 1) {
    await Promise.resolve();
  }
}

/** Последний запрос, подходящий под фильтр. */
function lastRequest(
  fetchMock: ReturnType<typeof installFetch>,
  predicate: { url: string; method?: string },
): RecordedRequest | undefined {
  const matching = recordedRequests(fetchMock).filter(
    (request) =>
      request.url.includes(predicate.url) &&
      (predicate.method === undefined || request.method === predicate.method.toUpperCase()),
  );
  return matching.at(-1);
}

/** Вход в комнату «как есть»: с готовыми маршрутами и сессией. */
async function joinRoom(
  channelId = 'c-voice',
  voice: VoiceRoutes = voiceRoutes(),
): Promise<ReturnType<typeof installFetch>> {
  const fetchMock = installFetch([...voice.routes]);
  await useVoiceConnectionStore.getState().join('g-1', channelId);
  return fetchMock;
}

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

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

describe('голосовая сессия: подключение', () => {
  it('входит в комнату по токену и публикует микрофон', async () => {
    const voice = voiceRoutes();
    const fetchMock = installFetch([...voice.routes]);

    await useVoiceConnectionStore.getState().join('g-1', 'c-voice');

    const state = useVoiceConnectionStore.getState();
    expect(state.status).toBe('connected');
    expect(state.guildId).toBe('g-1');
    expect(state.channelId).toBe('c-voice');
    expect(state.error).toBeNull();
    expect(state.participants.map((participant) => participant.userId)).toEqual(['user-1']);

    const [call] = FakeRoom.latest().connectCalls;
    expect(call?.url).toBe('wss://gl.localhost/rtc');
    expect(call?.token).not.toBe('');
    expect(FakeRoom.latest().localParticipant.calls).toContainEqual({
      method: 'setMicrophoneEnabled',
      value: true,
    });

    // Сервер уже знает о нас: состояние легло в снапшот сессии.
    expect(lastRequest(fetchMock, { url: '/voice/join', method: 'POST' })).toBeDefined();
    expect(
      useSessionStore.getState().voiceStates['g-1']?.some((item) => item.user_id === 'user-1'),
    ).toBe(true);
  });

  it('показывает участников комнаты из SDK с речью и качеством связи', async () => {
    await joinRoom();
    const room = FakeRoom.latest();
    room.addRemote('user-2', 'Bob', { quality: 'poor' });
    room.activeSpeakers(['user-2']);

    const state = useVoiceConnectionStore.getState();
    expect(state.participants.map((participant) => participant.userId)).toEqual([
      'user-1',
      'user-2',
    ]);
    const bob = state.participants.find((participant) => participant.userId === 'user-2');
    expect(bob?.isSpeaking).toBe(true);
    expect(bob?.quality).toBe('poor');
    expect(bob?.audio).toBeDefined();
  });

  it('повторный вход в ту же комнату ничего не делает', async () => {
    const voice = voiceRoutes();
    const fetchMock = await joinRoom('c-voice', voice);

    await useVoiceConnectionStore.getState().join('g-1', 'c-voice');

    expect(voice.joinCount()).toBe(1);
    expect(lastRequest(fetchMock, { url: '/voice/join', method: 'POST' })).toBeDefined();
  });

  it('переходит в другую комнату через выход и вход', async () => {
    const voice = voiceRoutes({ channelIds: ['c-voice', 'c-other'] });
    const fetchMock = installFetch([...voice.routes]);

    await useVoiceConnectionStore.getState().join('g-1', 'c-voice');
    await useVoiceConnectionStore.getState().join('g-1', 'c-other');

    const voiceRequests = recordedRequests(fetchMock)
      .filter((request) => request.url.includes('/voice/'))
      .map((request) => `${request.method} ${request.url.split('/api/v1')[1] ?? ''}`);
    expect(voiceRequests).toEqual([
      'POST /channels/c-voice/voice/join',
      'POST /channels/c-voice/voice/leave',
      'POST /channels/c-other/voice/join',
    ]);
    expect(useVoiceConnectionStore.getState().channelId).toBe('c-other');
  });

  it('выходит из комнаты и очищает состояние', async () => {
    const fetchMock = await joinRoom();
    FakeRoom.latest().addRemote('user-2', 'Bob');

    await useVoiceConnectionStore.getState().leave();

    const state = useVoiceConnectionStore.getState();
    expect(state.status).toBe('idle');
    expect(state.channelId).toBeNull();
    expect(state.participants).toEqual([]);
    expect(lastRequest(fetchMock, { url: '/voice/leave', method: 'POST' })).toBeDefined();
    expect(FakeRoom.latest().disconnectCalls).toBe(1);
  });
});

describe('голосовая сессия: флаги', () => {
  it('кнопки микрофона, камеры и наушников управляют SDK и уходят на сервер', async () => {
    const fetchMock = await joinRoom();
    const store = useVoiceConnectionStore.getState();

    await store.setMicEnabled(false);
    expect(FakeRoom.latest().localParticipant.calls).toContainEqual({
      method: 'setMicrophoneEnabled',
      value: false,
    });
    expect(lastRequest(fetchMock, { url: '/voice-states/@me', method: 'PATCH' })?.body).toEqual({
      self_mute: true,
    });

    await useVoiceConnectionStore.getState().setCameraEnabled(true);
    expect(FakeRoom.latest().localParticipant.calls).toContainEqual({
      method: 'setCameraEnabled',
      value: true,
    });
    expect(lastRequest(fetchMock, { url: '/voice-states/@me', method: 'PATCH' })?.body).toEqual({
      camera: true,
    });

    await useVoiceConnectionStore.getState().setDeafened(true);
    expect(useVoiceConnectionStore.getState().deafened).toBe(true);
    expect(useVoiceStore.getState().headphonesEnabled).toBe(false);
    expect(lastRequest(fetchMock, { url: '/voice-states/@me', method: 'PATCH' })?.body).toEqual({
      self_deaf: true,
    });

    await useVoiceConnectionStore.getState().setScreenShareEnabled(true);
    expect(FakeRoom.latest().localParticipant.calls).toContainEqual({
      method: 'setScreenShareEnabled',
      value: true,
    });
    expect(lastRequest(fetchMock, { url: '/voice-states/@me', method: 'PATCH' })?.body).toEqual({
      screen: true,
    });
  });

  it('без подключения кнопки только сохраняют предпочтения', async () => {
    const fetchMock = installFetch([]);

    await useVoiceConnectionStore.getState().setMicEnabled(false);

    expect(useVoiceStore.getState().micEnabled).toBe(false);
    expect(lastRequest(fetchMock, { url: '/voice-states/@me', method: 'PATCH' })).toBeUndefined();
  });

  it('серверный мьют выключает микрофон и блокирует включение', async () => {
    const fetchMock = await joinRoom();

    dispatchGatewayEvent({
      op: 0,
      t: 'VOICE_STATE_UPDATE',
      s: 1,
      d: makeVoiceState({ user_id: 'user-1', channel_id: 'c-voice', server_mute: true }),
    });
    await flush();

    const state = useVoiceConnectionStore.getState();
    expect(state.serverMuted).toBe(true);
    expect(state.micEnabled).toBe(false);
    expect(FakeRoom.latest().localParticipant.calls).toContainEqual({
      method: 'setMicrophoneEnabled',
      value: false,
    });

    // Пользователь не может включить микрофон, пока модератор не снимет мьют.
    await state.setMicEnabled(true);
    expect(useVoiceConnectionStore.getState().micEnabled).toBe(false);
    expect(useVoiceStore.getState().micEnabled).toBe(true);

    // Модератор снял мьют — кнопка снова доступна.
    dispatchGatewayEvent({
      op: 0,
      t: 'VOICE_STATE_UPDATE',
      s: 2,
      d: makeVoiceState({ user_id: 'user-1', channel_id: 'c-voice', server_mute: false }),
    });
    await flush();
    expect(useVoiceConnectionStore.getState().serverMuted).toBe(false);
    await useVoiceConnectionStore.getState().setMicEnabled(true);
    expect(useVoiceConnectionStore.getState().micEnabled).toBe(true);
    expect(lastRequest(fetchMock, { url: '/voice-states/@me', method: 'PATCH' })?.body).toEqual({
      self_mute: false,
    });
  });

  it('серверное глушение блокирует кнопку наушников', async () => {
    await joinRoom();

    dispatchGatewayEvent({
      op: 0,
      t: 'VOICE_STATE_UPDATE',
      s: 1,
      d: makeVoiceState({ user_id: 'user-1', channel_id: 'c-voice', server_deaf: true }),
    });
    await flush();

    expect(useVoiceConnectionStore.getState().serverDeafened).toBe(true);
    expect(useVoiceConnectionStore.getState().deafened).toBe(true);
  });

  it('личная громкость участника хранится локально', async () => {
    await joinRoom();

    useVoiceConnectionStore.getState().setVolume('user-2', 40);

    expect(useVoiceStore.getState().participantVolumes['user-2']).toBe(40);
  });

  it('перемещение и модерация уходят на сервер', async () => {
    const voice = voiceRoutes({
      states: [makeVoiceState({ user_id: 'user-2', channel_id: 'c-voice' })],
    });
    const fetchMock = await joinRoom('c-voice', voice);

    await useVoiceConnectionStore.getState().setParticipantMuted('g-1', 'user-2', true);
    expect(voice.states.find((item) => item.user_id === 'user-2')?.server_mute).toBe(true);
    expect(lastRequest(fetchMock, { url: '/voice-states/user-2', method: 'PATCH' })?.body).toEqual({
      server_mute: true,
    });

    await useVoiceConnectionStore.getState().setParticipantDeafened('g-1', 'user-2', true);
    expect(voice.states.find((item) => item.user_id === 'user-2')?.server_deaf).toBe(true);
    expect(lastRequest(fetchMock, { url: '/voice-states/user-2', method: 'PATCH' })?.body).toEqual({
      server_deaf: true,
    });

    await useVoiceConnectionStore.getState().moveParticipant('g-1', 'user-2', 'c-other');
    expect(voice.states.find((item) => item.user_id === 'user-2')?.channel_id).toBe('c-other');
    expect(
      lastRequest(fetchMock, { url: '/voice-states/user-2/move', method: 'POST' })?.body,
    ).toEqual({ channel_id: 'c-other' });
  });
});

describe('голосовая сессия: синхронизация с сервером', () => {
  it('VOICE_STATE_UPDATE добавляет и убирает участника', async () => {
    await joinRoom();

    dispatchGatewayEvent({
      op: 0,
      t: 'VOICE_STATE_UPDATE',
      s: 1,
      d: makeVoiceState({ user_id: 'user-2', channel_id: 'c-voice' }),
    });
    expect(
      useSessionStore.getState().voiceStates['g-1']?.some((item) => item.user_id === 'user-2'),
    ).toBe(true);

    dispatchGatewayEvent({
      op: 0,
      t: 'VOICE_STATE_UPDATE',
      s: 2,
      d: { guild_id: 'g-1', channel_id: 'c-voice', user_id: 'user-2', left: true },
    });
    expect(
      useSessionStore.getState().voiceStates['g-1']?.some((item) => item.user_id === 'user-2'),
    ).toBe(false);
  });

  it('переподключается в комнату, куда нас переместил модератор', async () => {
    const voice = voiceRoutes({ channelIds: ['c-voice', 'c-other'] });
    const fetchMock = installFetch([...voice.routes]);
    await useVoiceConnectionStore.getState().join('g-1', 'c-voice');
    const first = FakeRoom.latest();

    dispatchGatewayEvent({
      op: 0,
      t: 'VOICE_STATE_UPDATE',
      s: 1,
      d: makeVoiceState({ user_id: 'user-1', channel_id: 'c-other' }),
    });
    await flush(24);

    expect(useVoiceConnectionStore.getState().channelId).toBe('c-other');
    // Старая комната закрыта, для новой создана своя сессия SDK.
    expect(first.disconnectCalls).toBe(1);
    expect(FakeRoom.instances).toHaveLength(2);
    expect(FakeRoom.latest().connectCalls).toHaveLength(1);
    expect(
      lastRequest(fetchMock, { url: '/channels/c-other/voice/join', method: 'POST' }),
    ).toBeDefined();
  });

  it('окончательный разрыв соединения возвращает в idle и шлёт leave', async () => {
    const fetchMock = await joinRoom();

    FakeRoom.latest().emit(RoomEvent.Disconnected);
    await flush(24);

    expect(useVoiceConnectionStore.getState().status).toBe('idle');
    expect(useVoiceConnectionStore.getState().participants).toEqual([]);
    expect(lastRequest(fetchMock, { url: '/voice/leave', method: 'POST' })).toBeDefined();
  });

  it('во время переподключения показывает статус reconnecting', async () => {
    await joinRoom();

    FakeRoom.latest().emit(RoomEvent.Reconnecting);
    expect(useVoiceConnectionStore.getState().status).toBe('reconnecting');

    FakeRoom.latest().emit(RoomEvent.Reconnected);
    expect(useVoiceConnectionStore.getState().status).toBe('connected');
  });
});

describe('голосовая сессия: продление токена', () => {
  beforeEach(() => {
    vi.useFakeTimers();
    vi.setSystemTime(new Date('2026-09-19T10:00:00Z'));
  });

  it('за минуту до истечения берёт новый токен и переподключается с флагами', async () => {
    const first = fakeVoiceToken(30);
    const second = fakeVoiceToken(3600);
    const voice = voiceRoutes({ tokens: [first, second] });
    const fetchMock = await joinRoom('c-voice', voice);

    await useVoiceConnectionStore.getState().setMicEnabled(false);
    await useVoiceConnectionStore.getState().setCameraEnabled(true);

    // exp через 30 секунд: продление планируется на минимальную задержку.
    await vi.advanceTimersByTimeAsync(TOKEN_REFRESH_MIN_DELAY_MS + 1);
    await flush(24);

    const room = FakeRoom.latest();
    expect(room.connectCalls.map((call) => call.token)).toEqual([first, second]);
    expect(room.disconnectCalls).toBe(1);
    expect(voice.joinCount()).toBe(2);
    // Флаги применились заново и подтверждены на сервере.
    expect(
      room.localParticipant.calls.filter((call) => call.method === 'setMicrophoneEnabled'),
    ).toEqual([
      { method: 'setMicrophoneEnabled', value: true },
      { method: 'setMicrophoneEnabled', value: false },
      { method: 'setMicrophoneEnabled', value: false },
    ]);
    expect(lastRequest(fetchMock, { url: '/voice-states/@me', method: 'PATCH' })?.body).toEqual({
      self_mute: true,
      self_deaf: false,
      camera: true,
      screen: false,
    });
    expect(useVoiceConnectionStore.getState().status).toBe('connected');
    expect(useVoiceConnectionStore.getState().refreshing).toBe(false);
  });

  it('после трёх неудач выходит из комнаты и показывает ошибку', async () => {
    const voice = voiceRoutes({
      tokens: [fakeVoiceToken(30)],
      joinSuccesses: 1,
    });
    const fetchMock = await joinRoom('c-voice', voice);

    await vi.advanceTimersByTimeAsync(TOKEN_REFRESH_MIN_DELAY_MS + 1);
    await flush(40);

    const state = useVoiceConnectionStore.getState();
    expect(voice.joinCount()).toBe(4);
    expect(state.status).toBe('error');
    expect(state.error).toEqual({ code: VOICE_SESSION_EXPIRED_CODE });
    expect(state.participants).toEqual([]);
    expect(lastRequest(fetchMock, { url: '/voice/leave', method: 'POST' })).toBeDefined();
  });
});

describe('голосовая сессия: предупреждение о речи', () => {
  beforeEach(() => {
    vi.useFakeTimers();
    vi.setSystemTime(new Date('2026-09-19T10:00:00Z'));
  });

  it('показывает подсказку не чаще одного раза в 5 секунд', async () => {
    await joinRoom();
    await useVoiceConnectionStore.getState().setMicEnabled(false);
    const room = FakeRoom.latest();

    room.activeSpeakers(['user-1']);
    expect(useVoiceConnectionStore.getState().speakingWhileMuted).toBe(true);

    // Подсказка сама исчезает, но раньше пяти секунд не повторяется.
    await vi.advanceTimersByTimeAsync(SPEAKING_WARNING_VISIBLE_MS + 1);
    expect(useVoiceConnectionStore.getState().speakingWhileMuted).toBe(false);
    room.activeSpeakers(['user-1']);
    expect(useVoiceConnectionStore.getState().speakingWhileMuted).toBe(false);

    await vi.advanceTimersByTimeAsync(SPEAKING_WARNING_INTERVAL_MS);
    room.activeSpeakers(['user-1']);
    expect(useVoiceConnectionStore.getState().speakingWhileMuted).toBe(true);
  });

  it('молчит, когда микрофон включён', async () => {
    await joinRoom();

    FakeRoom.latest().activeSpeakers(['user-1']);

    expect(useVoiceConnectionStore.getState().speakingWhileMuted).toBe(false);
  });

  it('подсказку можно скрыть вручную', async () => {
    await joinRoom();
    await useVoiceConnectionStore.getState().setMicEnabled(false);
    FakeRoom.latest().activeSpeakers(['user-1']);

    useVoiceConnectionStore.getState().dismissSpeakingWarning();

    expect(useVoiceConnectionStore.getState().speakingWhileMuted).toBe(false);
  });
});