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// also supports youtube, which we could remove
// from https://codepen.io/pierrinho/pen/vNLGMa
sclass HImageCarousel {
  new L<Slide> slides;
  
  record Slide(S imgIDOrURL, S html) {
    S html() { ret html; }
    
    *(S *imgIDOrURL, S title, S text) {
      html = htmlCombine_new(
        h2(title),
        p(text));
    }
  }
  
  S jsLibs() {
    ret hjs("https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js")
      + hjs("https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.js")
      + hjs("https://cdnjs.cloudflare.com/ajax/libs/fitvids/1.1.0/jquery.fitvids.min.js");
  }
  
  JS js() { ret JS(mlsUnindent([[
    var tag = document.createElement('script');
    tag.src = "https://www.youtube.com/player_api";
    var firstScriptTag = document.getElementsByTagName('script')[0];
    firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
    
    // 3. This function creates an <iframe> (and YouTube player)
    //    after the API code downloads.
    var player;
    function onYouTubePlayerAPIReady() {
      player = new YT.Player('player', {
        playerVars: { 'rel': 0, 'autoplay': 1, 'controls': 0,'autohide':1,'showinfo': 0, 'wmode':'opaque' },
        videoId: 'QjlFqgRbICY',
        //suggestedQuality: 'hd720',
        events: {
          'onReady': onPlayerReady}
      });
    }
    
    // 4. The API will call this function when the video player is ready.
    function onPlayerReady(event) {
      event.target.mute();
      event.target.setPlaybackQuality('hd720');
      //$(".video").fitVids();
      
      $('.video i').on('click',function() {
        if ($('.video').hasClass('on')) {
          event.target.mute();
          $('.video').removeClass('on');
        } else {
          event.target.unMute();
          $('.video').addClass('on');
        }
      });
      
    }
    
    function onPlayerStateChange(event) {
        if (event.data == YT.PlayerState.BUFFERING) {
            event.target.setPlaybackQuality('hd720');
        }
    }
    
    $(document).ready(function() {
      
      var time = 7; // time in seconds
    
      var $progressBar,
          $bar, 
          $elem, 
          isPause, 
          tick,
          percentTime;
    
      //Init the carousel
      $("#owl-example").owlCarousel({
        items: 1,
        slideSpeed : 500,
        paginationSpeed : 500,
        singleItem : true,
        afterInit: progressBar,
        afterMove : moved,
        startDragging : pauseOnDragging
      });
    
      //Init progressBar where elem is $("#owl-demo")
      function progressBar(elem){
    
        $elem = elem;
        // building playing slideshow
        buildButtons();
        
        $('.columns:last-child').on('click',function() {
          if ($('#owl-example .slide-' + $(this).data('slide')).hasClass('open')) {
            //isPause = false;
            $('#owl-example .slide-' + $(this).data('slide')).removeClass('open');
          } else {
            //isPause = true;
            $('#owl-example .slide-' + $(this).data('slide')).addClass('open');
          }
        });
          
        $('.fa-pause').on('click',function() {
          isPause = false;
          $(this).fadeOut(0);
          $('.fa-play').fadeIn();
        });
        
        $('.fa-play').on('click',function() {
          isPause = true;
          $(this).fadeOut(0);
          $('.fa-pause').fadeIn();
        });
        
        setTimeout(function(){
          $('.slide-1 .columns:last-child').trigger('click');
        }, 1000); 
        
        //build progress bar elements
        buildProgressBar();
        //start counting
        start();
      }
    
      //create div#progressBar and div#bar then prepend to $("#owl-demo")
      function buildProgressBar(){
        $progressBar = $("<div>",{
          id:"progressBar"
        });
        $bar = $("<div>",{
          id:"bar"
        });
        $progressBar.append($bar).prependTo($elem);
      }
      
      function buildButtons() {
        $buttonPause = $("<i>",{
          class:"fa fa-pause"
        });
        $buttonPlay = $("<i>",{
          class:"fa fa-play"
        });
        $buttonPause.prependTo($elem);
        $buttonPlay.prependTo($elem);
      }
    
      function start() {  
        //reset timer
        percentTime = 0;
        isPause = false;
        //run interval every 0.01 second
        tick = setInterval(interval, 10);
      };
    
      function interval() {
        if(isPause === false){
          percentTime += 1 / time;
          $bar.css({
            width: percentTime+"%"
          });
          //if percentTime is equal or greater than 100
          if(percentTime >= 100){
            //slide to next item 
            $elem.trigger('owl.next')
          }
        }
      }
    
      //pause while dragging 
      function pauseOnDragging(){
        isPause = true;
      }
    
      //moved callback
      function moved(){
        
        if (isPause == false) {
          //clear interval
          clearTimeout(tick);
          //start again
          start();
          //player.pauseVideo();
        }
        
      }
    
      //uncomment this to make pause on mouseover 
      // $elem.on('mouseover',function(){
      //   isPause = true;
      // })
      // $elem.on('mouseout',function(){
      //   isPause = false;
      // })
         
    });
  ]])); }
  
  CSS css() { ret CSS(mlsUnindent([[
    #bar {
      width: 0%;
      max-width: 100%;
      height: 6px;
      background-color: #F9DC09;
    }
    
    #progressBar {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      width: 100%;
      background-color: white;
      z-index: 1;
    }
    
    .fa-play,
    .fa-pause {
      position: absolute;
      bottom: 3px;
      left: 0;
      padding: 20px;
      cursor: pointer;
      font-size: 1.2rem;
      color: rgba(255, 255, 255, 0.6);
      z-index: 100;
    }
    .fa-play:hover,
    .fa-pause:hover {
      color: white;
    }
    
    .fa-pause {
      display: none;
    }
    
    .owl-carousel {
      position: relative;
      margin: 0 auto;
      padding: 0;
      border: 0;
      height: 100vh;
      overflow: hidden;
    }
    .owl-carousel .slide {
      position: relative;
      overflow: hidden;
      padding: 0;
      margin: 0;
    }
    .owl-carousel .slide img {
      width: 100%;
    }
    .owl-carousel .slide .video i {
      position: absolute;
      top: 0;
      left: 0;
      padding: 20px;
      cursor: pointer;
      font-size: 3rem;
      color: rgba(255, 255, 255, 0.6);
      z-index: 100;
    }
    .owl-carousel .slide .video i.fa-volume-off {
      display: block;
    }
    .owl-carousel .slide .video i.fa-volume-up {
      display: none;
    }
    .owl-carousel .slide .video i:hover {
      color: white;
    }
    .owl-carousel .slide .video.on i.fa-volume-off {
      display: none;
    }
    .owl-carousel .slide .video.on i.fa-volume-up {
      display: block;
    }
    .owl-carousel .slide .row {
      position: relative;
      max-width: 100%;
      width: 100%;
    }
    .owl-carousel .slide .row .columns {
      padding: 0;
    }
    .owl-carousel .slide .row .columns:first-child {
      width: 97%;
      -moz-transition-property: all;
      -o-transition-property: all;
      -webkit-transition-property: all;
      transition-property: all;
      -moz-transition-duration: 0.3s;
      -o-transition-duration: 0.3s;
      -webkit-transition-duration: 0.3s;
      transition-duration: 0.3s;
      -moz-transition-timing-function: ease-in-out;
      -o-transition-timing-function: ease-in-out;
      -webkit-transition-timing-function: ease-in-out;
      transition-timing-function: ease-in-out;
    }
    .owl-carousel .slide .row .columns:last-child {
      position: absolute;
      top: 0;
      left: 97%;
      overflow: hidden;
      float: none;
      height: 100%;
      padding: 60px;
      background-color: white;
      -moz-transition-property: all;
      -o-transition-property: all;
      -webkit-transition-property: all;
      transition-property: all;
      -moz-transition-duration: 0.3s;
      -o-transition-duration: 0.3s;
      -webkit-transition-duration: 0.3s;
      transition-duration: 0.3s;
      -moz-transition-timing-function: ease-in-out;
      -o-transition-timing-function: ease-in-out;
      -webkit-transition-timing-function: ease-in-out;
      transition-timing-function: ease-in-out;
    }
    .owl-carousel .slide .row .columns:last-child i {
      position: absolute;
      display: block;
      top: 8px;
      left: 8px;
      cursor: pointer;
      padding: 10px;
    }
    .owl-carousel .slide .row .columns:last-child i.fa-times {
      display: none;
    }
    .owl-carousel .slide .row .columns:last-child i.fa-long-arrow-left {
      display: block;
    }
    .owl-carousel .slide.open .row .columns:first-child {
      width: 80%;
    }
    .owl-carousel .slide.open .row .columns:first-child.wrap-video {
      width: 97%;
    }
    .owl-carousel .slide.open .row .columns:last-child {
      width: 40%;
      left: 60%;
    }
    .owl-carousel .slide.open .row .columns:last-child i.fa-times {
      display: block;
    }
    .owl-carousel .slide.open .row .columns:last-child i.fa-long-arrow-left {
      display: none;
    }
    
    .owl-theme .owl-controls {
      position: absolute;
      left: 45px;
      bottom: 15px;
      text-align: left;
    }
    
    .owl-theme .owl-controls .owl-page span {
      background-color: white;
    }
    
    .fluid-width-video-wrapper {
      width: 100%;
      position: relative;
      padding: 0;
    }
    
    .fluid-width-video-wrapper iframe,
    .fluid-width-video-wrapper object,
    .fluid-width-video-wrapper embed {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }
  ]])); }
  
  S cssLibs() {
    ret hcss("https://cdnjs.cloudflare.com/ajax/libs/foundation/5.5.2/css/foundation.min.css")
      + hcss("https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.css")
      + hcss("https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.theme.min.css")
      + hcss("https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.4.0/css/font-awesome.css");
  }
  
  S headStuff() { ret htmlCombine_new(cssLibs(), css(), jsLibs(), js()); }
  
  S html() {
    new LS slidesHtml;
    
    for i over slides: {
      var slide = slides.get(i);
      int index = i+1;
      slidesHtml.add(
        div_inv(class := "slide slide-" + index + (index == 1 ? "" : " open"),
          div_inv(class :="row", htmlCombine_new(
            div_inv(class := "columns",
              himg(slide.imgIDOrURL)
            ),
            div_inv(class := "columns", "data-slide" := index, htmlCombine_new(
              i("", class := "fa fa-times"),
              i("", class := "fa fa-long-arrow-left"),
              slide.html()
            ))
          ))
      ));
    }
    
    ret div_inv(id := "owl-example", class := "owl-carousel",
      htmlCombine_new(slidesHtml));
  }
  
  void add aka addSlide(Slide slide) { slides.add(slide); }
}