// Highlighter

import highlighterStyles from "./Highlighter.module.css";

import _ from "lodash";

const Highlighter = function (ns) {

  return class extends ns.Widgets.Widget {

    constructor(player, config) {

      super(player, config);

      var _this = this;

      this.throttledRefresh = _.throttle(function () {

        _this.update();

      }, 800);

    }

    /**

     * Highlighter widget

     * This widgets highlights the current annotations by setting the

     * .activeAnnotation class on appropriate .Ldt-Highlighter-Annotation

     * elements. These elements *must* have data-begin and data-end properties specifying their bounds (in ms) (and data-media specifying the media-id)

     */

    static defaults = {};

    update() {

      var _this = this;

      var _currentTime = _this.media.getCurrentTime();

      _this.$.find(".Ldt-Highlighter-Annotation", document).toggleClass(

        "currentAnnotation",

        function () {

          return (

            this.dataset.media === _this.media.id &&

            this.dataset.begin <= _currentTime &&

            _currentTime < this.dataset.end

          );

        }

      );

      return false;

    }

    draw() {

      var _this = this;

      var _events = ["timeupdate", "seeked", "loadedmetadata"];

      for (var _i = 0; _i < _events.length; _i++) {

        _this.onMediaEvent(_events[_i], _this.throttledRefresh);

      }

      _this.throttledRefresh();

    }

  };

};

export { Highlighter, highlighterStyles };