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

import type Chat from "./chat";
import type ChatTopbar from "./topbar";
import mediaSizes from "../../helpers/mediaSizes";
import DivAndCaption from "../divAndCaption";
import ripple from "../ripple";
import ListenerSetter from "../../helpers/listenerSetter";
import cancelEvent from "../../helpers/dom/cancelEvent";
import { attachClickEvent } from "../../helpers/dom/clickEvent";
import { Message } from "../../layer";
import safeAssign from "../../helpers/object/safeAssign";

const classNames: string[] = ['is-pinned-message-shown', 'is-pinned-audio-shown'];
const CLASSNAME_BASE = 'pinned-container';
const HEIGHT = 52;

export default class PinnedContainer {
  public wrapperUtils: HTMLElement;
  public btnClose: HTMLElement;
  protected wrapper: HTMLElement;

  protected topbar: ChatTopbar;
  protected chat: Chat;
  protected listenerSetter: ListenerSetter;
  public className: string;
  public divAndCaption: DivAndCaption<(title: string | HTMLElement | DocumentFragment, subtitle: string | HTMLElement | DocumentFragment, message?: any) => void>;
  
  protected floating = false;

  public onClose?: () => void | Promise<boolean>;

  constructor(options: {
    topbar: PinnedContainer['topbar'],
    chat: PinnedContainer['chat'],
    listenerSetter: PinnedContainer['listenerSetter'],
    className: PinnedContainer['className'],
    divAndCaption: PinnedContainer['divAndCaption'],
    onClose?: PinnedContainer['onClose'],
    floating?: PinnedContainer['floating']
  }) {
    safeAssign(this, options);

    const {divAndCaption, className} = this;
    divAndCaption.container.classList.add(CLASSNAME_BASE, 'hide');
    divAndCaption.title.classList.add(CLASSNAME_BASE + '-title');
    divAndCaption.subtitle.classList.add(CLASSNAME_BASE + '-subtitle');
    divAndCaption.content.classList.add(CLASSNAME_BASE + '-content');
    
    this.btnClose = document.createElement('button');
    this.btnClose.classList.add(CLASSNAME_BASE + '-close', `pinned-${className}-close`, 'btn-icon', 'tgico-close');
    
    this.wrapper = document.createElement('div');
    this.wrapper.classList.add(CLASSNAME_BASE + '-wrapper');
    ripple(this.wrapper);

    this.wrapperUtils = document.createElement('div');
    this.wrapperUtils.classList.add(CLASSNAME_BASE + '-wrapper-utils');
    this.wrapperUtils.append(this.btnClose);

    this.wrapper.append(...Array.from(divAndCaption.container.children), this.wrapperUtils);

    divAndCaption.container.append(this.wrapper/* , this.close */);

    this.attachOnCloseEvent(this.btnClose);
  }

  public attachOnCloseEvent(elem: HTMLElement) {
    attachClickEvent(elem, (e) => {
      cancelEvent(e);

      ((this.onClose ? this.onClose() : null) || Promise.resolve(true)).then((needClose) => {
        if(needClose) {
          this.toggle(true);
        }
      });
    }, {listenerSetter: this.listenerSetter});
  }

  public toggle(hide?: boolean) {
    const isHidden = this.divAndCaption.container.classList.contains('hide');
    if(hide === undefined) {
      hide = !isHidden;
    } else if(hide === isHidden) {
      return;
    }

    // const scrollable = this.chat.bubbles.scrollable;
    
    const isFloating = (this.floating || mediaSizes.isMobile) && !hide;
    // const scrollTop = isFloating || this.divAndCaption.container.classList.contains('is-floating') ? scrollable.scrollTop : undefined;

    this.divAndCaption.container.classList.toggle('is-floating', isFloating);
    this.divAndCaption.container.classList.toggle('hide', hide);
    
    this.topbar.container.classList.toggle('is-pinned-floating', isFloating);
    this.topbar.container.classList.toggle(`is-pinned-${this.className}-shown`, !hide);
    
    // const active = classNames.filter((className) => this.topbar.container.classList.contains(className));
    // const maxActive = hide ? 0 : 1;
    
    // * not sure when it became unneeded
    // if(scrollTop !== undefined && active.length <= maxActive/*  && !scrollable.isScrolledDown */) {
    //   scrollable.scrollTop = scrollTop + ((hide ? -1 : 1) * HEIGHT);
    // }
    
    this.topbar.setFloating();
    this.topbar.setUtilsWidth();
  }

  public isVisible() {
    return !this.divAndCaption.container.classList.contains('hide');
  }

  public isFloating() {
    return this.divAndCaption.container.classList.contains('is-floating');
  }

  public fill(title: string | HTMLElement | DocumentFragment, subtitle: string | HTMLElement | DocumentFragment, message: Message.message) {
    this.divAndCaption.container.dataset.peerId = '' + message.peerId;
    this.divAndCaption.container.dataset.mid = '' + message.mid;
    this.divAndCaption.fill(title, subtitle, message);
    this.topbar.setUtilsWidth();
  }
}