import { Parser, ReloadContinuationItemsCommand } from '../../parser/index.js';
import { concatMemos, InnertubeError } from '../../utils/Utils.js';
import BackstagePost from '../../parser/classes/BackstagePost.js';
import SharedPost from '../../parser/classes/SharedPost.js';
import Channel from '../../parser/classes/Channel.js';
import CompactVideo from '../../parser/classes/CompactVideo.js';
import GridChannel from '../../parser/classes/GridChannel.js';
import GridPlaylist from '../../parser/classes/GridPlaylist.js';
import GridVideo from '../../parser/classes/GridVideo.js';
import LockupView from '../../parser/classes/LockupView.js';
import Playlist from '../../parser/classes/Playlist.js';
import PlaylistPanelVideo from '../../parser/classes/PlaylistPanelVideo.js';
import PlaylistVideo from '../../parser/classes/PlaylistVideo.js';
import Post from '../../parser/classes/Post.js';
import ReelItem from '../../parser/classes/ReelItem.js';
import ShortsLockupView from '../../parser/classes/ShortsLockupView.js';
import ReelShelf from '../../parser/classes/ReelShelf.js';
import RichShelf from '../../parser/classes/RichShelf.js';
import Shelf from '../../parser/classes/Shelf.js';
import Tab from '../../parser/classes/Tab.js';
import Video from '../../parser/classes/Video.js';
import AppendContinuationItemsAction from '../../parser/classes/actions/AppendContinuationItemsAction.js';
import ContinuationItem from '../../parser/classes/ContinuationItem.js';
import ContinuationItemView from '../../parser/classes/ContinuationItemView.js';
import TwoColumnBrowseResults from '../../parser/classes/TwoColumnBrowseResults.js';
import TwoColumnSearchResults from '../../parser/classes/TwoColumnSearchResults.js';
import WatchCardCompactVideo from '../../parser/classes/WatchCardCompactVideo.js';
import { observe } from '../../parser/helpers.js';
export default class Feed {
    #page;
    #actions;
    #memo;
    #continuation;
    constructor(actions, response, already_parsed = false) {
        if (this.#isParsed(response) || already_parsed) {
            this.#page = response;
        }
        else {
            this.#page = Parser.parseResponse(response.data);
        }
        const memo = concatMemos(...[
            this.#page.contents_memo,
            this.#page.continuation_contents_memo,
            this.#page.on_response_received_commands_memo,
            this.#page.on_response_received_endpoints_memo,
            this.#page.on_response_received_actions_memo,
            this.#page.sidebar_memo,
            this.#page.header_memo
        ]);
        if (!memo)
            throw new InnertubeError('No memo found in feed');
        this.#memo = memo;
        this.#actions = actions;
    }
    #isParsed(response) {
        return !('data' in response);
    }
    /**
     * Get all videos on a given page via memo
     */
    static getVideosFromMemo(memo) {
        return observe(memo.getType(Video, GridVideo, ReelItem, ShortsLockupView, CompactVideo, LockupView, PlaylistVideo, PlaylistPanelVideo, WatchCardCompactVideo).filter((item) => !item.is(LockupView) || (item.content_type === 'VIDEO' || item.content_type === 'MOVIE' || item.content_type === 'SHORT' || item.content_type == 'STATION')));
    }
    /**
     * Get all playlists on a given page via memo
     */
    static getPlaylistsFromMemo(memo) {
        const playlists = memo.getType(Playlist, GridPlaylist);
        const lockup_views = memo.getType(LockupView)
            .filter((lockup) => {
            return ['PLAYLIST', 'ALBUM', 'PODCAST'].includes(lockup.content_type);
        });
        if (lockup_views.length > 0) {
            playlists.push(...lockup_views);
        }
        return playlists;
    }
    /**
     * Get all the videos in the feed
     */
    get videos() {
        return Feed.getVideosFromMemo(this.#memo);
    }
    /**
     * Get all the community posts in the feed
     */
    get posts() {
        return this.#memo.getType(BackstagePost, Post, SharedPost);
    }
    /**
     * Get all the channels in the feed
     */
    get channels() {
        return this.#memo.getType(Channel, GridChannel);
    }
    /**
     * Get all playlists in the feed
     */
    get playlists() {
        return Feed.getPlaylistsFromMemo(this.#memo);
    }
    get memo() {
        return this.#memo;
    }
    /**
     * Returns contents from the page.
     */
    get page_contents() {
        const tab_content = this.#memo.getType(Tab)?.[0].content;
        const reload_continuation_items = this.#memo.getType(ReloadContinuationItemsCommand)[0];
        const append_continuation_items = this.#memo.getType(AppendContinuationItemsAction)[0];
        return tab_content || reload_continuation_items || append_continuation_items;
    }
    /**
     * Returns all segments/sections from the page.
     */
    get shelves() {
        return this.#memo.getType(Shelf, RichShelf, ReelShelf);
    }
    /**
     * Finds shelf by title.
     */
    getShelf(title) {
        return this.shelves.find((shelf) => shelf.title.toString() === title);
    }
    /**
     * Returns secondary contents from the page.
     */
    get secondary_contents() {
        if (!this.#page.contents?.is_node)
            return null;
        const node = this.#page.contents?.item();
        if (!node.is(TwoColumnBrowseResults, TwoColumnSearchResults))
            return null;
        return node.secondary_contents;
    }
    get actions() {
        return this.#actions;
    }
    /**
     * Get the original page data
     */
    get page() {
        return this.#page;
    }
    /**
     * Checks if the feed has continuation.
     */
    get has_continuation() {
        return this.#getBodyContinuations().length > 0;
    }
    /**
     * Retrieves continuation data as it is.
     */
    async getContinuationData() {
        if (this.#continuation) {
            if (this.#continuation.length === 0)
                throw new InnertubeError('There are no continuations');
            return await this.#continuation[0].endpoint.call(this.#actions, { parse: true });
        }
        this.#continuation = this.#getBodyContinuations();
        if (this.#continuation)
            return this.getContinuationData();
    }
    /**
     * Retrieves next batch of contents and returns a new {@link Feed} object.
     */
    async getContinuation() {
        const continuation_data = await this.getContinuationData();
        if (!continuation_data)
            throw new InnertubeError('Could not get continuation data');
        return new Feed(this.actions, continuation_data, true);
    }
    #getBodyContinuations() {
        if (this.#page.header_memo) {
            const header_continuations = this.#page.header_memo.getType(ContinuationItem, ContinuationItemView);
            return this.#memo.getType(ContinuationItem, ContinuationItemView).filter((continuation) => !header_continuations.includes(continuation));
        }
        return this.#memo.getType(ContinuationItem, ContinuationItemView);
    }
}
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