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

import { SliderSuperTab } from "../../slider";
import ButtonCorner from "../../buttonCorner";
import appUsersManager from "../../../lib/appManagers/appUsersManager";
import AppNewGroupTab from "./newGroup";
import { toast } from "../../toast";
import { ButtonMenuItemOptions } from "../../buttonMenu";
import type { LazyLoadQueueIntersector } from "../../lazyLoadQueue";
import { i18n, join, _i18n } from "../../../lib/langPack";
import rootScope from '../../../lib/rootScope';
import { wrapSticker } from "../../wrappers";
import appStickersManager from "../../../lib/appManagers/appStickersManager";
import SortedUserList from "../../sortedUserList";
import { PeerLocated, Update, Updates } from "../../../layer";
import appPeersManager from "../../../lib/appManagers/appPeersManager";
import { SettingChatListSection } from "..";
import appProfileManager from "../../../lib/appManagers/appProfileManager";
import appDialogsManager from "../../../lib/appManagers/appDialogsManager";
import { attachClickEvent } from "../../../helpers/dom/clickEvent";
import confirmationPopup from "../../confirmationPopup";

export default class AppPeopleNearbyTab extends SliderSuperTab {
  private latestLocationSaved: {latitude: number, longitude: number, accuracy: number};
  private isLocationWatched: boolean = false;
  private errorCategory: HTMLElement;
  private retryBtn: HTMLButtonElement;
  private btnOptions: HTMLButtonElement;
  private menuButtons: (ButtonMenuItemOptions & {verify?: () => boolean})[];

  protected lazyLoadQueue: LazyLoadQueueIntersector;
  protected peopleSection: SettingChatListSection;
  protected chatsSection: SettingChatListSection;

  protected locatedPeers: Map<PeerId, PeerLocated.peerLocated>;

  protected init() {
    this.container.classList.add('people-nearby-container');
    this.setTitle('PeopleNearby');

    this.errorCategory = document.createElement('div');
    this.errorCategory.classList.add('text', 'hide', 'nearby-error');

    this.retryBtn = ButtonCorner({icon: 'check'});

    const emoji = '🧭';
    const doc = appStickersManager.getAnimatedEmojiSticker(emoji);
    const stickerContainer = document.createElement('div');
    stickerContainer.classList.add('sticker-container');

    if(doc) {
      wrapSticker({
        doc,
        div: stickerContainer,
        loop: false,
        play: true,
        width: 86,
        height: 86,
        emoji,
        needUpscale: true
      }).then(() => {
        // this.animation = player;
      });
    } else {
      stickerContainer.classList.add('media-sticker-wrapper');
    }

    const caption = document.createElement('div');
    caption.classList.add('caption');
    _i18n(caption, 'PeopleNearbyInfo2');

    this.locatedPeers = new Map();

    const m = () => {
      const sortedUserList = new SortedUserList({
        avatarSize: 42, 
        createChatListOptions: {
          dialogSize: 48,
          new: true
        },
        autonomous: false,
        onUpdate: (element) => {
          const peer = this.locatedPeers.get(element.id);
          const elements: HTMLElement[] = [
            this.parseDistance(peer.distance)
          ];

          if(!element.id.isUser()) {
            elements.push(appProfileManager.getChatMembersString(element.id.toChatId()));
          }

          element.dom.lastMessageSpan.textContent = '';
          element.dom.lastMessageSpan.append(...join(elements, false));
        },
        getIndex: (element) => {
          const peer = this.locatedPeers.get(element.id);
          return 0x7FFFFFFF - peer.distance;
        }
      });

      appDialogsManager.setListClickListener(sortedUserList.list, undefined, undefined, false);
      
      return sortedUserList;
    };
    
    const peopleSection = this.peopleSection = new SettingChatListSection({
      name: 'PeopleNearbyHeader',
      sortedList: m()
    });

    const chatsSection = this.chatsSection = new SettingChatListSection({
      name: 'ChatsNearbyHeader',
      sortedList: m()
    });

    const btnMakeVisible = peopleSection.makeButton({
      text: 'MakeMyselfVisible',
      icon: 'location'
    });

    const btnMakeInvisible = peopleSection.makeButton({
      text: 'StopShowingMe',
      icon: 'location'
    });

    const btnCreateGroup = chatsSection.makeButton({
      text: 'NearbyCreateGroup',
      icon: 'newgroup'
    });

    attachClickEvent(btnMakeVisible, () => {
      confirmationPopup({
        titleLangKey: 'MakeMyselfVisibleTitle',
        descriptionLangKey: 'MakeMyselfVisibleInfo',
        button: {
          langKey: 'OK'
        }
      }).then(() => {
        this.startWatching();
      });
    }, {listenerSetter: this.listenerSetter});

    attachClickEvent(btnMakeInvisible, () => {
      this.stopWatching();
    }, {listenerSetter: this.listenerSetter});

    attachClickEvent(btnCreateGroup, () => {
      new AppNewGroupTab(this.slider).open([], true);
    }, {listenerSetter: this.listenerSetter});

    btnMakeVisible.classList.add('primary');
    btnMakeInvisible.classList.add('danger');
    btnCreateGroup.classList.add('primary');

    this.content.append(this.retryBtn);
    this.scrollable.append(
      stickerContainer,
      caption,
      peopleSection.container,
      chatsSection.container,
      this.errorCategory
    );
  }

  private parseDistance(distance: number) {
    if(rootScope.settings.distanceUnit === 'miles') {
      if(distance > 1609.34) {
        return i18n('MilesAway', [Math.round(distance / 1609)]);
      } else {
        return i18n('FootsAway', [Math.round(distance * 3.281)]);
      }
    } else {
      if(distance >= 1000) {
        return i18n('KMetersAway2', [distance / 1000]);
      } else {
        return i18n('MetersAway2', [distance]);
      }
    }
  }

  public open() {
    const result = super.open();
    result.then(() => {
      this.retryBtn.classList.remove('is-visible');
      navigator.geolocation.getCurrentPosition((location) => {
        this.latestLocationSaved = {
          latitude: location.coords.latitude,
          longitude: location.coords.longitude,
          accuracy: location.coords.accuracy
        };

        console.log(this.latestLocationSaved);

        appUsersManager.getLocated(
          location.coords.latitude,
          location.coords.longitude,
          location.coords.accuracy
        ).then((response) => {
          const update = (response as Updates.updates).updates[0] as Update.updatePeerLocated;
          const peers = update.peers as PeerLocated.peerLocated[];
          const orderedPeers = peers.sort((a, b) => a.distance - b.distance);
          const groupsCounter = peers.filter((e) => e.peer._ == 'peerChannel').length;
          const usersCounter = peers.filter((e) => e.peer._ != 'peerChannel').length;
          orderedPeers?.forEach(peer => {
            const peerId = appPeersManager.getPeerId(peer.peer);
            const section = peerId.isUser() ? this.peopleSection : this.chatsSection;
            this.locatedPeers.set(peerId, peer);
            section.sortedList.add(peerId);
          });

          this.errorCategory.classList.toggle('hide', !!(usersCounter || groupsCounter));
          this.errorCategory.innerHTML = "No groups or channels found around you.";
        });
      }, (error) => {
        this.errorCategory.classList.remove('hide');
        this.retryBtn.classList.add('is-visible');
        this.retryBtn.addEventListener('click', this.open);
        if(error instanceof GeolocationPositionError) {
          this.errorCategory.innerHTML = "Location permission denied. Click below to retry.";
        } else {
          this.errorCategory.innerHTML = "An error has occurred. Please retry later clicking the button below.";
        }
      });
    });

    return result;
  }

  private startWatching() {
    if(!this.latestLocationSaved || this.isLocationWatched) return;
    this.isLocationWatched = true;

    toast('Your position is now being shared. Do not close the page or it will be suspended.');

    appUsersManager.getLocated(
      this.latestLocationSaved.latitude,
      this.latestLocationSaved.longitude,
      this.latestLocationSaved.accuracy,
      true, // background parameter
      0x7fffffff // self_expires parameter
    );

    navigator.geolocation.watchPosition((result) => {
      const isLongitudeDifferent = result.coords.longitude !== this.latestLocationSaved.longitude;
      const isLatitudeDifferent = result.coords.latitude !== this.latestLocationSaved.latitude;
      const distanceCheck = this.calculateDistance(
        result.coords.latitude, result.coords.longitude,
        this.latestLocationSaved.latitude, this.latestLocationSaved.longitude
      ) > 100;

      if((isLatitudeDifferent || isLongitudeDifferent) && distanceCheck) {
        appUsersManager.getLocated(
          result.coords.latitude,
          result.coords.longitude,
          result.coords.accuracy,
          true, // background parameter
          0x7fffffff // self_expires parameter
        );
        this.latestLocationSaved = {
          latitude: result.coords.latitude,
          longitude: result.coords.longitude,
          accuracy: result.coords.accuracy
        }
      }
    });
  }

  private stopWatching() {
    if(!this.isLocationWatched) return;
    this.isLocationWatched = false;
    toast('The sharing of your position has been stopped. You will no longer be visible to other users.');
    appUsersManager.getLocated(
      0, // latitude parameter
      0, // longitude parameter
      0, // accuracy parameter
      false, // background parameter
      0 // self_expires parameter
    );
  }

  private calculateDistance(lat1: number, long1: number, lat2: number, long2: number) {
    const p = 0.017453292519943295; // Math.PI/180
    return (
      12742 * Math.asin(
        Math.sqrt(
          (0.5 - Math.cos((lat2 - lat1) * p)) +
          (
            Math.cos(lat1 * p) * Math.cos(lat2 * p)
            * (1 - Math.cos((long2 - long1) * p)/2)
          )
        )
      )
    );
  }
}