/*
 * https://github.com/morethanwords/tweb
 * Copyright (C) 2019-2021 Eduard Kuzmenko
 * https://github.com/morethanwords/tweb/blob/master/LICENSE
 */

import type LazyLoadQueue from './lazyLoadQueue';
import appDialogsManager, {AppDialogsManager, DialogDom, DialogElementSize} from '../lib/appManagers/appDialogsManager';
import {getHeavyAnimationPromise} from '../hooks/useHeavyAnimationCheck';
import isInDOM from '../helpers/dom/isInDOM';
import positionElementByIndex from '../helpers/dom/positionElementByIndex';
import replaceContent from '../helpers/dom/replaceContent';
import {fastRaf} from '../helpers/schedulers';
import SortedList, {SortedElementBase} from '../helpers/sortedList';
import safeAssign from '../helpers/object/safeAssign';
import {AppManagers} from '../lib/appManagers/managers';
import getUserStatusString from './wrappers/getUserStatusString';
import getChatMembersString from './wrappers/getChatMembersString';
import wrapParticipantRank from './wrappers/participantRank';
import getParticipantRank from '../lib/appManagers/utils/chats/getParticipantRank';

interface SortedUser extends SortedElementBase<PeerId> {
  dom: DialogDom
}

export default class SortedUserList extends SortedList<SortedUser> {
  protected static SORT_INTERVAL = 30e3;
  public list: HTMLUListElement;
  public ranks: Map<PeerId, ReturnType<typeof getParticipantRank>> = new Map();

  protected lazyLoadQueue: LazyLoadQueue;
  protected avatarSize: DialogElementSize = 'abitbigger';
  protected rippleEnabled = true;
  protected autonomous = true;
  protected createChatListOptions: Parameters<AppDialogsManager['createChatList']>[0];
  protected onListLengthChange: () => void;
  protected getIndex: (element: SortedUser) => number;
  protected onUpdate: (element: SortedUser) => void;
  protected managers: AppManagers;

  constructor(options: Partial<{
    lazyLoadQueue: SortedUserList['lazyLoadQueue'],
    avatarSize: SortedUserList['avatarSize'],
    rippleEnabled: SortedUserList['rippleEnabled'],
    createChatListOptions: SortedUserList['createChatListOptions'],
    autonomous: SortedUserList['autonomous'],
    onListLengthChange: SortedUserList['onListLengthChange'],
    getIndex: SortedUserList['getIndex'],
    onUpdate: SortedUserList['onUpdate']
  }> & {
    managers: SortedUserList['managers']
  }) {
    super({
      getIndex: options.getIndex || ((element) => element.id.isAnyChat() ? 0 : this.managers.appUsersManager.getUserStatusForSort(element.id)),
      onDelete: (element) => {
        element.dom.listEl.remove();
        this.onListLengthChange && this.onListLengthChange();
      },
      onUpdate: options.onUpdate || (async(element) => {
        if(element.id.isAnyChat()) {
          const status = await getChatMembersString(element.id.toChatId(), this.managers);
          replaceContent(element.dom.lastMessageSpan, status);
        } else {
          const status = getUserStatusString(await this.managers.appUsersManager.getUser(element.id));
          replaceContent(element.dom.lastMessageSpan, status);
        }
      }),
      onSort: (element, idx) => {
        const willChangeLength = element.dom.listEl.parentElement !== this.list;
        positionElementByIndex(element.dom.listEl, this.list, idx);

        if(willChangeLength && this.onListLengthChange) {
          this.onListLengthChange();
        }
      },
      onElementCreate: (base) => {
        const dialogElement = appDialogsManager.addDialogNew({
          peerId: base.id,
          container: false,
          avatarSize: this.avatarSize,
          autonomous: this.autonomous,
          meAsSaved: false,
          rippleEnabled: this.rippleEnabled,
          wrapOptions: {
            lazyLoadQueue: this.lazyLoadQueue
          }
        });

        const rank = this.ranks.get(base.id);
        if(rank) {
          dialogElement.titleRight.replaceChildren(wrapParticipantRank(rank));
        }

        (base as SortedUser).dom = dialogElement.dom;
        return base as SortedUser;
      },
      updateElementWith: fastRaf,
      updateListWith: async(callback) => {
        if(!Array.from(this.elements.values()).some((element) => element.id.isUser())) {
          return callback(false);
        }

        if(!isInDOM(this.list)) {
          return callback(false);
        }

        await getHeavyAnimationPromise();

        if(!isInDOM(this.list)) {
          return callback(false);
        }

        callback(true);
      }
    });

    safeAssign(this, options);

    this.list = appDialogsManager.createChatList(this.createChatListOptions);

    let timeout: number;
    const doTimeout = () => {
      timeout = window.setTimeout(() => {
        this.updateList((good) => {
          if(good) {
            doTimeout();
          }
        });
      }, SortedUserList.SORT_INTERVAL);
    };

    doTimeout();
  }
}