'use strict';

const Parser = require('../contents');
const History = require('./History');
const Playlist = require('./Playlist');
const Feed = require('../../core/Feed');
const { observe } = require('../../utils/Utils');

/** @namespace */
class Library {
  #actions;
  #page;

  /**
   * @param {object} response - API response.
   * @param {import('../../core/Actions')} actions
   */
  constructor(response, actions) {
    this.#actions = actions;
    this.#page = Parser.parseResponse(response);

    const tab = this.#page.contents.tabs.get({ selected: true });
    const shelves = tab.content.contents.map((section) => section.contents[0]);

    const stats = this.#page.contents.secondary_contents.items.get({ type: 'ProfileColumnStats' }).items;
    const user_info = this.#page.contents.secondary_contents.items.get({ type: 'ProfileColumnUserInfo' });

    this.profile = { stats, user_info };

    /** @type {{ type: string, title: import('../contents/classes/Text'), contents: object[], getAll: Promise.<Playlist | History | Feed> }[] } */
    this.sections = observe(shelves.map((shelf) => ({
      type: shelf.icon_type,
      title: shelf.title,
      contents: shelf.content.items,
      getAll: () => this.#getAll(shelf)
    })));
  }

  async #getAll(shelf) {
    if (!shelf.menu?.top_level_buttons)
      throw new Error(`The ${shelf.title.text} section doesn't have more items`);

    const button = await shelf.menu.top_level_buttons.get({ text: 'See all' });
    const page = await button.endpoint.call(this.#actions);

    switch (shelf.icon_type) {
      case 'LIKE':
      case 'WATCH_LATER':
        return new Playlist(this.#actions, page, true);
      case 'WATCH_HISTORY':
        return new History(this.#actions, page, true);
      case 'CONTENT_CUT':
        return new Feed(this.#actions, page, true);
      default:
    }
  }

  get history() {
    return this.sections.get({ type: 'WATCH_HISTORY' });
  }

  get watch_later() {
    return this.sections.get({ type: 'WATCH_LATER' });
  }

  get liked_videos() {
    return this.sections.get({ type: 'LIKE' });
  }

  get playlists() {
    return this.sections.get({ type: 'PLAYLISTS' });
  }

  get clips() {
    return this.sections.get({ type: 'CONTENT_CUT' });
  }

  get page() {
    return this.#page;
  }
}

module.exports = Library;