/*
    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 functions related to videos.
 */

/**
 * Display the video player and play a video
 *
 * @param {string} videoId - The video ID of the video to be played.
 *
 * @return {Void}
 */
function playVideo(videoId, playlistId = '') {
    hideViews();

    playerView.playerSeen = true;
    playerView.firstLoad = true;
    playerView.videoId = videoId;
    playerView.videoAudio = undefined;
    playerView.validAudio = true;
    playerView.video480p = undefined;
    playerView.valid480p = true;
    playerView.video720p = undefined;
    playerView.valid720p = true;
    playerView.videoUrl = '';
    playerView.embededHtml = "<iframe width='560' height='315' src='https://www.youtube-nocookie.com/embed/" + videoId + "?rel=0' frameborder='0' allow='autoplay; encrypted-media' allowfullscreen></iframe>";

    let videoHtml = '';

    const checkSavedVideo = videoIsSaved(videoId);

    // Change the save button icon and text depending on if the user has saved the video or not.
    checkSavedVideo.then((results) => {
        if (results === false) {
            playerView.savedText = 'FAVORITE';
            playerView.savedIconType = 'far unsaved';
        } else {
            playerView.savedText = 'FAVORITED';
            playerView.savedIconType = 'fas saved';
        }
    });

    youtubedlGetInfo(videoId, (data) => {
      console.log(data);

      let videoUrls = data.formats;
      let formatUrls = data.player_response.streamingData.adaptiveFormats;

      // Search through the returned object to get the 480p and 720p video URLs (If available)
      Object.keys(videoUrls).forEach((key) => {
          switch (videoUrls[key]['itag']) {
          case '18':
              playerView.video480p = decodeURIComponent(videoUrls[key]['url']);
              // console.log(playerView.video480p);
              break;
          case '22':
              playerView.video720p = decodeURIComponent(videoUrls[key]['url']);
              // console.log(playerView.video720p);
              break;
          }
      });

      // Last adaptive format will be best the quality audio stream (migrate fully to adaptive formats later)
      playerView.videoAudio = decodeURIComponent(formatUrls[formatUrls.length - 1]['url']);

      if (typeof(playerView.videoAudio) === 'undefined') {
        console.log(playerView.videoAudio);
        playerView.validAudio = false;
      }

      let useEmbedPlayer = false;

      // Default to the embeded player if the URLs cannot be found.
      if (typeof (playerView.video720p) === 'undefined' && typeof (playerView.video480p) === 'undefined') {
          //useEmbedPlayer = true;
          playerView.currentQuality = 'EMBED';
          playerView.playerSeen = false;
          //useEmbedPlayer = true;
          showToast('Unable to get video file.  Reverting to embeded player.');
      }
      else if (typeof (playerView.video720p) === 'undefined' && typeof (playerView.video480p) !== 'undefined') {
          // Default to the 480p video if the 720p URL cannot be found.
          console.log('Found');
          playerView.videoUrl = playerView.video480p;
          playerView.currentQuality = '480p';
      } else {
          // Default to the 720p video.
          playerView.videoUrl = playerView.video720p;
          playerView.currentQuality = '720p';
          //playerView.videoUrl = playerView.liveManifest;
      }

    if (!useEmbedPlayer &&
      typeof(data.player_response.captions) !== 'undefined' &&
      typeof(data.player_response.captions.playerCaptionsTracklistRenderer) !== 'undefined' &&
      typeof(data.player_response.captions.playerCaptionsTracklistRenderer.captionTracks) !== 'undefined') {
        data.player_response.captions.playerCaptionsTracklistRenderer.captionTracks.forEach((caption) => {
            let subtitleUrl = invidiousInstance + '/api/v1/captions/' + videoId  + '?label=' + caption.name.simpleText;

            videoHtml = videoHtml + '<track kind="subtitles" src="' + subtitleUrl + '" srclang="' + caption.languageCode + '" label="' + caption.name.simpleText + '">';
        });

        playerView.subtitleHtml = videoHtml;
      }

      loadingView.seen = false;

      if (subscriptionView.seen === false && aboutView.seen === false && headerView.seen === false && searchView.seen === false && settingsView.seen === false && popularView.seen === false && savedView.seen === false && historyView.seen === false && channelView.seen === false && channelVideosView.seen === false) {
          playerView.seen = true;
      } else {
          return;
      }

      window.setTimeout(checkVideoUrls, 5000, playerView.video480p, playerView.video720p, playerView.videoAudio);
    });

    invidiousAPI('videos', videoId, {}, (data) => {

      console.log(data);

        // Figure out the width for the like/dislike bar.
        playerView.videoLikes = data.likeCount;
        playerView.videoDislikes = data.dislikeCount;
        let totalLikes = parseInt(playerView.videoLikes) + parseInt(playerView.videoDislikes);
        playerView.likePercentage = parseInt((playerView.videoLikes / totalLikes) * 100);
        playerView.videoTitle = data.title;
        playerView.channelName = data.author;
        playerView.channelId = data.authorId;
        playerView.channelIcon = data.authorThumbnails[2].url;

        // Add commas to the video view count.
        playerView.videoViews = data.viewCount.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");

        playerView.videoThumbnail = data.videoThumbnails[0].url;

        // Format the date to a more readable format.
        let dateString = new Date(data.published * 1000);
        dateString.setDate(dateString.getDate() + 1);
        playerView.publishedDate = dateFormat(dateString, "mmm dS, yyyy");

        playerView.description = parseDescription(data.descriptionHtml);

        const checkSubscription = isSubscribed(playerView.channelId);

        checkSubscription.then((results) => {
            if (results === false) {
                playerView.subscribedText = 'SUBSCRIBE';
            } else {
                playerView.subscribedText = 'UNSUBSCRIBE';
            }
        });

        playerView.recommendedVideoList = [];

        data.recommendedVideos.forEach((video) => {
            let data = {};

            let time = video.lengthSeconds;
            let hours = 0;

            if (time >= 3600) {
                hours = Math.floor(time / 3600);
                time = time - hours * 3600;
            }

            let minutes = Math.floor(time / 60);
            let seconds = time - minutes * 60;

            if (seconds < 10) {
                seconds = '0' + seconds;
            }

            if (hours > 0) {
                data.duration = hours + ":" + minutes + ":" + seconds;
            } else {
                data.duration = minutes + ":" + seconds;
            }

            data.id = video.videoId;
            data.title = video.title;
            data.channelName = video.author;
            data.thumbnail = video.videoThumbnails[4].url;
            data.viewCount = video.viewCountText;

            playerView.recommendedVideoList = playerView.recommendedVideoList.concat(data);
        });

        if (playlistId != '') {
          playerView.playlistSeen = true;
          playerView.playlistShowList = true;
          playerView.playlistId = playlistId;
          playerView.playlistVideoList = [];

          invidiousAPI('playlists', playlistId, {}, (data) => {
            playerView.playlistTitle = data.title;
            playerView.playlistChannelName = data.author;
            playerView.playlistChannelId = data.authorId;
            playerView.playlistTotal = data.videoCount;

            let amountOfPages = Math.ceil(data.videoCount / 100);

            for (let i = 1; i <= amountOfPages; i++) {
              invidiousAPI('playlists', playlistId, {page: i}, (data) => {
                data.videos.forEach((video) => {
                  let data = {};

                  if (video.videoId == videoId){
                    playerView.playlistIndex = video.index + 1;
                  }

                  data.title = video.title;
                  data.videoId = video.videoId;
                  data.channelName = video.author;
                  data.index = video.index + 1;
                  data.thumbnail = video.videoThumbnails[4].url;

                  playerView.playlistVideoList[video.index] = data;
                });
              });
            }
          });
        }
        else{
          playerView.playlistSeen = false;
          playerView.playlistShowList = false;
          playerView.playlistId = '';
        }

        if (rememberHistory === true){
          let historyData = {
            videoId: videoId,
            published: data.published,
            publishedText: playerView.publishedDate,
            description: data.description,
            viewCount: data.viewCount,
            title: playerView.videoTitle,
            lengthSeconds: data.lengthSeconds,
            videoThumbnails: playerView.videoThumbnail,
            author: playerView.channelName,
            authorId: playerView.channelId,
            liveNow: false,
            paid: false,
            type: 'video',
            timeWatched: new Date().getTime(),
          };

          console.log(historyData);
          addToHistory(historyData);
        }
    });
}

/**
 * Open up the mini player to watch the video outside of the main application.
 *
 * @param {string} videoThumbnail - The URL of the video thumbnail.  Used to prevent another API call.
 *
 * @return {Void}
 */
function openMiniPlayer() {
    let lastTime;
    let videoHtml;

    // Grabs whatever the HTML is for the current video player.  Done this way to grab
    // the HTML5 player (with varying qualities) as well as the YouTube embeded player.
    if ($('.videoPlayer').length > 0) {
        $('.videoPlayer').get(0).pause();
        lastTime = $('.videoPlayer').get(0).currentTime;
        videoHtml = $('.videoPlayer').get(0).outerHTML;
    } else {
        videoHtml = $('iframe').get(0).outerHTML;
    }

    // Create a new browser window.
    const BrowserWindow = electron.remote.BrowserWindow;

    let miniPlayer = new BrowserWindow({
        width: 1200,
        height: 710,
        autoHideMenuBar: true
    });

    // Use the miniPlayer.html template.
    $.get('templates/miniPlayer.html', (template) => {
        mustache.parse(template);
        const rendered = mustache.render(template, {
            videoHtml: videoHtml,
            videoThumbnail: playerView.thumbnail,
            startTime: lastTime,
        });
        // Render the template to the new browser window.
        miniPlayer.loadURL("data:text/html;charset=utf-8," + encodeURI(rendered));
    });
}

function checkVideoSettings() {
  let player = document.getElementById('videoPlayer');

  if (autoplay) {
    player.play();
  }

  if (enableSubtitles) {
    player.textTracks[0].mode = 'showing';
  }

  if (playerView.firstLoad) {
    playerView.firstLoad = false;

    switch (defaultQuality) {
      case '480':
        if (typeof(playerView.video480p) !== 'undefined') {
          playerView.videoUrl = playerView.video480p;
          playerView.currentQuality = '480p';
        }
        break;
      case '720':
        if (typeof(playerView.video720p) !== 'undefined') {
          playerView.videoUrl = playerView.video720p;
          playerView.currentQuality = '720p';
        }
        break;
      default:
        if (typeof(playerView.video720p) !== 'undefined') {
          playerView.videoUrl = playerView.video720p;
          playerView.currentQuality = '720p';
        }
        break;
    }

    player.playbackRate = parseFloat(defaultPlaybackRate);
    $('#currentSpeed').html(defaultPlaybackRate);
  }

  player.volume = currentVolume;
}

function playNextVideo() {
  let player = document.getElementById('videoPlayer');

  if (player.loop !== false || playerView.playlistSeen === false) {
    return;
  }

  if (playerView.playlistShuffle === true) {
    let randomVideo = Math.floor(Math.random() * playerView.playlistTotal);

    loadingView.seen = true;
    playVideo(playerView.playlistVideoList[randomVideo].videoId, playerView.playlistId);
    return;
  }

  if (playerView.playlistLoop === true && playerView.playlistIndex == playerView.playlistTotal) {
    loadingView.seen = true;
    playVideo(playerView.playlistVideoList[0].videoId, playerView.playlistId);
    return;
  }

  if (playerView.playlistIndex != playerView.playlistTotal) {
    loadingView.seen = true;
    playVideo(playerView.playlistVideoList[playerView.playlistIndex].videoId, playerView.playlistId);
    return;
  }
}

/**
 * Change the playpack speed of the video.
 *
 * @param {double} speed - The playback speed of the video.
 *
 * @return {Void}
 */
function changeVideoSpeed(speed) {
    $('#currentSpeed').html(speed);
    $('.videoPlayer').get(0).playbackRate = speed;
}

/**
 * Change the volume of the video player
 *
 * @param {double} amount - The volume to increase or descrease the volume by. Will be any double between 0 and 1.
 *
 * @return {Void}
 */
function changeVolume(amount) {
    const videoPlayer = $('.videoPlayer').get(0);
    let volume = videoPlayer.volume;
    volume = volume + amount;
    if (volume > 1) {
        videoPlayer.volume = 1;
    } else if (volume < 0) {
        videoPlayer.volume = 0;
    } else {
        videoPlayer.volume = volume;
    }
}

/**
 * Change the duration of the current time of a video by a few seconds.
 *
 * @param {integer} seconds - The amount of seconds to change the video by.  Integer may be positive or negative.
 *
 * @return {Void}
 */
function changeDurationBySeconds(seconds) {
    const videoPlayer = $('.videoPlayer').get(0);
    videoPlayer.currentTime = videoPlayer.currentTime + seconds;
}

/**
 * Change the duration of a video by a percentage of the duration.
 *
 * @param {double} percentage - The percentage to hop to of the video.  Will be any double between 0 and 1.
 *
 * @return {Void}
 */
function changeDurationByPercentage(percentage) {
    const videoPlayer = $('.videoPlayer').get(0);
    videoPlayer.currentTime = videoPlayer.duration * percentage;
}

function changeDuration(seconds) {
  const videoPlayer = $('.videoPlayer').get(0);
  videoPlayer.currentTime = seconds;
}

function updateVolume(){
  let player = document.getElementById('videoPlayer');
  currentVolume = player.volume
}

function parseDescription(descriptionText) {
  descriptionText = descriptionText.replace(/target\=\"\_blank\"/g, '');
  descriptionText = descriptionText.replace(/\/redirect.+?(?=q\=)/g, '');
  descriptionText = descriptionText.replace(/q\=/g, '');
  descriptionText = descriptionText.replace(/rel\=\"nofollow\snoopener\"/g, '');
  descriptionText = descriptionText.replace(/class\=.+?(?=\")./g, '');
  descriptionText = descriptionText.replace(/id\=.+?(?=\")./g, '');
  descriptionText = descriptionText.replace(/data\-target\-new\-window\=.+?(?=\")./g, '');
  descriptionText = descriptionText.replace(/data\-url\=.+?(?=\")./g, '');
  descriptionText = descriptionText.replace(/data\-sessionlink\=.+?(?=\")./g, '');
  descriptionText = descriptionText.replace(/\&amp\;/g, '&');
  descriptionText = descriptionText.replace(/\%3A/g, ':');
  descriptionText = descriptionText.replace(/\%2F/g, '/');
  descriptionText = descriptionText.replace(/\&v.+?(?=\")/g, '');
  descriptionText = descriptionText.replace(/\&redirect\-token.+?(?=\")/g, '');
  descriptionText = descriptionText.replace(/\&redir\_token.+?(?=\")/g, '');
  descriptionText = descriptionText.replace(/href\=\"http(s)?\:\/\/youtube\.com/g, 'href="freetube://https://youtube.com');
  descriptionText = descriptionText.replace(/href\=\"\/watch/g, 'href="freetube://https://youtube.com');
  descriptionText = descriptionText.replace(/href\=\"\/results\?search\_query\=/g, 'href="freetube://');
  descriptionText = descriptionText.replace(/yt\.www\.watch\.player\.seekTo/g, 'changeDuration');

  return descriptionText;
}