import BigInt from 'big-integer';
import { Api as GramJs } from '../../../lib/gramjs';

import {
  ApiAppConfig,
  ApiChat,
  ApiLangString,
  ApiLanguage,
  ApiNotifyException,
  ApiUser,
  ApiWallpaper,
} from '../../types';
import { ApiPrivacyKey, InputPrivacyRules, LangCode } from '../../../types';

import { BLOCKED_LIST_LIMIT, DEFAULT_LANG_PACK, LANG_PACKS } from '../../../config';
import {
  buildApiCountryList,
  buildApiNotifyException,
  buildApiSession,
  buildApiWallpaper,
  buildPrivacyRules,
} from '../apiBuilders/misc';

import { buildApiUser } from '../apiBuilders/users';
import { buildApiChatFromPreview } from '../apiBuilders/chats';
import { buildInputEntity, buildInputPeer, buildInputPrivacyKey } from '../gramjsBuilders';
import { getClient, invokeRequest, uploadFile } from './client';
import { omitVirtualClassFields } from '../apiBuilders/helpers';
import { buildCollectionByKey } from '../../../util/iteratees';
import { getServerTime } from '../../../util/serverTime';
import { getApiChatIdFromMtpPeer } from '../apiBuilders/peers';
import localDb from '../localDb';
import { buildApiConfig } from '../apiBuilders/appConfig';
import { addEntitiesWithPhotosToLocalDb } from '../helpers';

const MAX_INT_32 = 2 ** 31 - 1;
const BETA_LANG_CODES = ['ar', 'fa', 'id', 'ko', 'uz', 'en'];

export function updateProfile({
  firstName,
  lastName,
  about,
}: {
  firstName?: string;
  lastName?: string;
  about?: string;
}) {
  return invokeRequest(new GramJs.account.UpdateProfile({
    firstName: firstName || '',
    lastName: lastName || '',
    about: about || '',
  }), true);
}

export function checkUsername(username: string) {
  return invokeRequest(new GramJs.account.CheckUsername({ username }));
}

export function updateUsername(username: string) {
  return invokeRequest(new GramJs.account.UpdateUsername({ username }), true);
}

export async function updateProfilePhoto(file: File) {
  const inputFile = await uploadFile(file);
  return invokeRequest(new GramJs.photos.UploadProfilePhoto({
    file: inputFile,
  }), true);
}

export async function uploadProfilePhoto(file: File) {
  const inputFile = await uploadFile(file);
  await invokeRequest(new GramJs.photos.UploadProfilePhoto({
    file: inputFile,
  }));
}

export async function fetchWallpapers() {
  const result = await invokeRequest(new GramJs.account.GetWallPapers({ hash: BigInt('0') }));

  if (!result || result instanceof GramJs.account.WallPapersNotModified) {
    return undefined;
  }

  const filteredWallpapers = result.wallpapers.filter((wallpaper) => {
    if (
      !(wallpaper instanceof GramJs.WallPaper)
      || !(wallpaper.document instanceof GramJs.Document)
    ) {
      return false;
    }

    return !wallpaper.pattern && wallpaper.document.mimeType !== 'application/x-tgwallpattern';
  }) as GramJs.WallPaper[];

  filteredWallpapers.forEach((wallpaper) => {
    localDb.documents[String(wallpaper.document.id)] = wallpaper.document as GramJs.Document;
  });

  return {
    wallpapers: filteredWallpapers.map(buildApiWallpaper).filter<ApiWallpaper>(Boolean as any),
  };
}

export async function uploadWallpaper(file: File) {
  const inputFile = await uploadFile(file);

  const result = await invokeRequest(new GramJs.account.UploadWallPaper({
    file: inputFile,
    mimeType: file.type,
    settings: new GramJs.WallPaperSettings(),
  }));

  if (!result || !(result instanceof GramJs.WallPaper)) {
    return undefined;
  }

  const wallpaper = buildApiWallpaper(result);
  if (!wallpaper) {
    return undefined;
  }

  localDb.documents[String(result.document.id)] = result.document as GramJs.Document;

  return { wallpaper };
}

export async function fetchBlockedContacts() {
  const result = await invokeRequest(new GramJs.contacts.GetBlocked({
    limit: BLOCKED_LIST_LIMIT,
  }));
  if (!result) {
    return undefined;
  }

  updateLocalDb(result);

  return {
    users: result.users.map(buildApiUser).filter<ApiUser>(Boolean as any),
    chats: result.chats.map((chat) => buildApiChatFromPreview(chat, undefined, true)).filter<ApiChat>(Boolean as any),
    blockedIds: result.blocked.map((blocked) => getApiChatIdFromMtpPeer(blocked.peerId)),
    totalCount: result instanceof GramJs.contacts.BlockedSlice ? result.count : result.blocked.length,
  };
}

export function blockContact(chatOrUserId: string, accessHash?: string) {
  return invokeRequest(new GramJs.contacts.Block({
    id: buildInputPeer(chatOrUserId, accessHash),
  }));
}

export function unblockContact(chatOrUserId: string, accessHash?: string) {
  return invokeRequest(new GramJs.contacts.Unblock({
    id: buildInputPeer(chatOrUserId, accessHash),
  }));
}

export async function fetchAuthorizations() {
  const result = await invokeRequest(new GramJs.account.GetAuthorizations());
  if (!result) {
    return undefined;
  }

  return {
    authorizations: buildCollectionByKey(result.authorizations.map(buildApiSession), 'hash'),
    ttlDays: result.authorizationTtlDays,
  };
}

export function terminateAuthorization(hash: string) {
  return invokeRequest(new GramJs.account.ResetAuthorization({ hash: BigInt(hash) }));
}

export function terminateAllAuthorizations() {
  return invokeRequest(new GramJs.auth.ResetAuthorizations());
}

export async function fetchNotificationExceptions({
  serverTimeOffset,
}: { serverTimeOffset: number }) {
  const result = await invokeRequest(new GramJs.account.GetNotifyExceptions({
    compareSound: true,
  }), undefined, undefined, true);

  if (!(result instanceof GramJs.Updates || result instanceof GramJs.UpdatesCombined)) {
    return undefined;
  }

  updateLocalDb(result);

  return result.updates.reduce((acc, update) => {
    if (!(update instanceof GramJs.UpdateNotifySettings && update.peer instanceof GramJs.NotifyPeer)) {
      return acc;
    }

    acc.push(buildApiNotifyException(update.notifySettings, update.peer.peer, serverTimeOffset));

    return acc;
  }, [] as ApiNotifyException[]);
}

export async function fetchNotificationSettings({
  serverTimeOffset,
}: { serverTimeOffset: number }) {
  const [
    isMutedContactSignUpNotification,
    privateContactNotificationsSettings,
    groupNotificationsSettings,
    broadcastNotificationsSettings,
  ] = await Promise.all([
    invokeRequest(new GramJs.account.GetContactSignUpNotification()),
    invokeRequest(new GramJs.account.GetNotifySettings({
      peer: new GramJs.InputNotifyUsers(),
    })),
    invokeRequest(new GramJs.account.GetNotifySettings({
      peer: new GramJs.InputNotifyChats(),
    })),
    invokeRequest(new GramJs.account.GetNotifySettings({
      peer: new GramJs.InputNotifyBroadcasts(),
    })),
  ]);

  if (!privateContactNotificationsSettings || !groupNotificationsSettings || !broadcastNotificationsSettings) {
    return false;
  }

  const {
    silent: privateSilent, muteUntil: privateMuteUntil, showPreviews: privateShowPreviews,
  } = privateContactNotificationsSettings;
  const {
    silent: groupSilent, muteUntil: groupMuteUntil, showPreviews: groupShowPreviews,
  } = groupNotificationsSettings;
  const {
    silent: broadcastSilent, muteUntil: broadcastMuteUntil, showPreviews: broadcastShowPreviews,
  } = broadcastNotificationsSettings;

  return {
    hasContactJoinedNotifications: !isMutedContactSignUpNotification,
    hasPrivateChatsNotifications: !(
      privateSilent
      || (typeof privateMuteUntil === 'number' && getServerTime(serverTimeOffset) < privateMuteUntil)
    ),
    hasPrivateChatsMessagePreview: privateShowPreviews,
    hasGroupNotifications: !(
      groupSilent || (typeof groupMuteUntil === 'number'
        && getServerTime(serverTimeOffset) < groupMuteUntil)
    ),
    hasGroupMessagePreview: groupShowPreviews,
    hasBroadcastNotifications: !(
      broadcastSilent || (typeof broadcastMuteUntil === 'number'
        && getServerTime(serverTimeOffset) < broadcastMuteUntil)
    ),
    hasBroadcastMessagePreview: broadcastShowPreviews,
  };
}

export function updateContactSignUpNotification(isSilent: boolean) {
  return invokeRequest(new GramJs.account.SetContactSignUpNotification({ silent: isSilent }));
}

export function updateNotificationSettings(peerType: 'contact' | 'group' | 'broadcast', {
  isSilent,
  shouldShowPreviews,
}: {
  isSilent: boolean;
  shouldShowPreviews: boolean;
}) {
  let peer: GramJs.TypeInputNotifyPeer;
  if (peerType === 'contact') {
    peer = new GramJs.InputNotifyUsers();
  } else if (peerType === 'group') {
    peer = new GramJs.InputNotifyChats();
  } else {
    peer = new GramJs.InputNotifyBroadcasts();
  }

  const settings = {
    showPreviews: shouldShowPreviews,
    silent: isSilent,
    muteUntil: isSilent ? MAX_INT_32 : 0,
  };

  return invokeRequest(new GramJs.account.UpdateNotifySettings({
    peer,
    settings: new GramJs.InputPeerNotifySettings(settings),
  }));
}

export async function fetchLanguages(): Promise<ApiLanguage[] | undefined> {
  const result = await invokeRequest(new GramJs.langpack.GetLanguages({
    langPack: DEFAULT_LANG_PACK,
  }));
  if (!result) {
    return undefined;
  }

  return result.map(omitVirtualClassFields);
}

export async function fetchLangPack({ sourceLangPacks, langCode }: {
  sourceLangPacks: typeof LANG_PACKS;
  langCode: string;
}) {
  const results = await Promise.all(sourceLangPacks.map((langPack) => {
    return invokeRequest(new GramJs.langpack.GetLangPack({
      langPack,
      langCode: BETA_LANG_CODES.includes(langCode) ? `${langCode}-raw` : langCode,
    }));
  }));

  const collections = results
    .filter<GramJs.LangPackDifference>(Boolean as any)
    .map((result) => {
      return buildCollectionByKey(result.strings.map<ApiLangString>(omitVirtualClassFields), 'key');
    });

  if (!collections.length) {
    return undefined;
  }

  return { langPack: Object.assign({}, ...collections.reverse()) as typeof collections[0] };
}

export async function fetchLangStrings({ langPack, langCode, keys }: {
  langPack: string; langCode: string; keys: string[];
}) {
  const result = await invokeRequest(new GramJs.langpack.GetStrings({
    langPack,
    langCode: BETA_LANG_CODES.includes(langCode) ? `${langCode}-raw` : langCode,
    keys,
  }));

  if (!result) {
    return undefined;
  }

  return result.map(omitVirtualClassFields);
}

export async function fetchPrivacySettings(privacyKey: ApiPrivacyKey) {
  const key = buildInputPrivacyKey(privacyKey);
  const result = await invokeRequest(new GramJs.account.GetPrivacy({ key }));

  if (!result) {
    return undefined;
  }

  updateLocalDb(result);

  return buildPrivacyRules(result.rules);
}

export function registerDevice(token: string) {
  const client = getClient();
  const secret = client.session.getAuthKey().getKey();
  return invokeRequest(new GramJs.account.RegisterDevice({
    tokenType: 10,
    secret,
    appSandbox: false,
    otherUids: [],
    token,
  }));
}

export function unregisterDevice(token: string) {
  return invokeRequest(new GramJs.account.UnregisterDevice({
    tokenType: 10,
    otherUids: [],
    token,
  }));
}

export async function setPrivacySettings(
  privacyKey: ApiPrivacyKey, rules: InputPrivacyRules,
) {
  const key = buildInputPrivacyKey(privacyKey);
  const privacyRules: GramJs.TypeInputPrivacyRule[] = [];

  if (rules.allowedUsers) {
    privacyRules.push(new GramJs.InputPrivacyValueAllowUsers({
      users: rules.allowedUsers.map(({ id, accessHash }) => buildInputEntity(id, accessHash) as GramJs.InputUser),
    }));
  }
  if (rules.allowedChats) {
    privacyRules.push(new GramJs.InputPrivacyValueAllowChatParticipants({
      chats: rules.allowedChats.map(({ id }) => buildInputEntity(id) as BigInt.BigInteger),
    }));
  }
  if (rules.blockedUsers) {
    privacyRules.push(new GramJs.InputPrivacyValueDisallowUsers({
      users: rules.blockedUsers.map(({ id, accessHash }) => buildInputEntity(id, accessHash) as GramJs.InputUser),
    }));
  }
  if (rules.blockedChats) {
    privacyRules.push(new GramJs.InputPrivacyValueDisallowChatParticipants({
      chats: rules.blockedChats.map(({ id }) => buildInputEntity(id) as BigInt.BigInteger),
    }));
  }
  switch (rules.visibility) {
    case 'everybody':
      privacyRules.push(new GramJs.InputPrivacyValueAllowAll());
      break;

    case 'contacts':
      privacyRules.push(new GramJs.InputPrivacyValueAllowContacts());
      break;

    case 'nonContacts':
      privacyRules.push(new GramJs.InputPrivacyValueDisallowContacts());
      break;

    case 'nobody':
      privacyRules.push(new GramJs.InputPrivacyValueDisallowAll());
      break;
  }

  const result = await invokeRequest(new GramJs.account.SetPrivacy({ key, rules: privacyRules }));

  if (!result) {
    return undefined;
  }

  updateLocalDb(result);

  return buildPrivacyRules(result.rules);
}

export async function updateIsOnline(isOnline: boolean) {
  await invokeRequest(new GramJs.account.UpdateStatus({ offline: !isOnline }));
}

export async function fetchContentSettings() {
  const result = await invokeRequest(new GramJs.account.GetContentSettings());
  if (!result) {
    return undefined;
  }

  return {
    isSensitiveEnabled: Boolean(result.sensitiveEnabled),
    canChangeSensitive: Boolean(result.sensitiveCanChange),
  };
}

export function updateContentSettings(isEnabled: boolean) {
  return invokeRequest(new GramJs.account.SetContentSettings({
    sensitiveEnabled: isEnabled || undefined,
  }));
}

export async function fetchAppConfig(): Promise<ApiAppConfig | undefined> {
  const result = await invokeRequest(new GramJs.help.GetAppConfig());
  if (!result) return undefined;

  return buildApiConfig(result);
}

function updateLocalDb(
  result: (
    GramJs.account.PrivacyRules | GramJs.contacts.Blocked | GramJs.contacts.BlockedSlice |
    GramJs.Updates | GramJs.UpdatesCombined
  ),
) {
  addEntitiesWithPhotosToLocalDb(result.users);
  addEntitiesWithPhotosToLocalDb(result.chats);
}

export async function fetchCountryList({ langCode = 'en' }: { langCode?: LangCode }) {
  const countryList = await invokeRequest(new GramJs.help.GetCountriesList({
    langCode,
  }));

  if (!(countryList instanceof GramJs.help.CountriesList)) {
    return undefined;
  }
  return buildApiCountryList(countryList.countries);
}