/*
    This file is part of FreeTube.

    FreeTube is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    FreeTube is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with FreeTube.  If not, see <http://www.gnu.org/licenses/>.
*/



/*
 * File for all functions related specifically for channels.
 */

/**
 * Display a channel page, showing latest uploads.
 *
 * @param {string} channelId - The channel ID to display.
 *
 * @return {Void}
 */
function goToChannel(channelId) {

  channelView.channelId = channelId;
  channelView.page = 2;

  headerView.title = 'Latest Uploads';
  hideViews();
  loadingView.seen = true;

  // Setting subButtonText here as Mustache templates are logic-less.
  isSubscribed(channelId).then((subscribed) => {
    channelView.subButtonText = (subscribed ? "UNSUBSCRIBE" : "SUBSCRIBE");
  });

  invidiousAPI('channels', channelId, {}, (data) => {
    ft.log(data);

    channelView.id = channelId;
    channelView.name = data.author;

    // Can't access url of undefined, check defined
    data.authorBanners.length
      ? channelView.banner = data.authorBanners[0].url
      : channelView.banner = undefined;

    data.authorThumbnails.length >= 4
      ? channelView.icon = data.authorThumbnails[3].url
      : channelView.icon = undefined

    channelView.subCount = data.subCount.toLocaleString(); //toLocaleString adds commas as thousands separators
    channelView.description = autolinker.link(data.description); //autolinker makes URLs clickable

    channelVideosView.videoList = [];

    const views = [
      aboutView,
      headerView,
      historyView,
      popularView,
      savedView,
      searchView,
      settingsView,
      subscriptionView
    ]

    if (seenAll(views, false)) {
      channelVideosView.seen = true;
      channelView.seen = true;
    }
    else {
      return;
    }

    loadingView.seen = false;
    data.latestVideos.forEach((video) => {
      displayVideo(video, 'channel');
    });

    if (typeof(channelView.banner) === 'undefined') {
       window.setTimeout(() => {$('.channelViewBanner').get(0).height = 200;}, 50);
    }
  }, (errorData) => {
    showToast(errorData.responseJSON.error);
    loadingView.seen = false;
  });
}

/**
 * Grab the next list of videos from a channel.
 *
 * @return {Void}
 */
function channelNextPage() {
  showToast('Fetching results, please wait…');

  invidiousAPI('channels/videos', channelView.channelId, { 'page': channelView.page }, (data) => {
    ft.log(data);
    data.forEach((video) => {
      displayVideo(video, 'channel');
    });
  });

  channelView.page = channelView.page + 1;
}

/**
 * Check the status of all view objects 'seen' property.
 * @param {Array} views - An array of view objects, that should have a 'seen' property
 * @param {bool} expected - The expected match, confirm all seen props === expected.
 *  True by default.
 * @returns {bool} - True if all views.seen === expected
 * @example seenAll{[view1, view2], false} => bool
 * @example seenAll{[view1, view2]} => bool
 */
function seenAll(views, expected = true) {
  return views.every(({ seen }) => seen === expected)
}