$.extend($.easing,
{
    def: 'easeOutQuad',
    easeInOutExpo: function (x, t, b, c, d) {
        if (t==0) return b;
        if (t==d) return b+c;
        if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
        return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
    }
});

(function( $ ) {

    var settings;
    var disableScrollFn = false;
    var navItems;
    var navs = {}, sections = {};

    $.fn.navScroller = function(options) {
        settings = $.extend({
            scrollToOffset: 170,
            scrollSpeed: 800,
            activateParentNode: true,
        }, options );
        navItems = this;

        //attatch click listeners
        navItems.on('click', function(event){
            event.preventDefault();
            var navID = $(this).attr("href").substring(1);
            disableScrollFn = true;
            activateNav(navID);
            populateDestinations(); //recalculate these!
            $('html,body').animate({scrollTop: sections[navID] - settings.scrollToOffset},
                settings.scrollSpeed, "easeInOutExpo", function(){
                    disableScrollFn = false;
                }
            );
        });

        //populate lookup of clicable elements and destination sections
        populateDestinations(); //should also be run on browser resize, btw

        // setup scroll listener
        $(document).scroll(function(){
            if (disableScrollFn) { return; }
            var page_height = $(window).height();
            var pos = $(this).scrollTop();
            for (i in sections) {
                if ((pos + settings.scrollToOffset >= sections[i]) && sections[i] < pos + page_height){
                    activateNav(i);
                }
            }
        });
    };

    function populateDestinations() {
        navItems.each(function(){
            var scrollID = $(this).attr('href').substring(1);
            navs[scrollID] = (settings.activateParentNode)? this.parentNode : this;
            sections[scrollID] = $(document.getElementById(scrollID)).offset().top;
        });
    }

    function activateNav(navID) {
        for (nav in navs) { $(navs[nav]).removeClass('active'); }
        $(navs[navID]).addClass('active');
    }
})( jQuery );


$(document).ready(function (){

    $('nav li a').navScroller();

    //section divider icon click gently scrolls to reveal the section
    $(".sectiondivider").on('click', function(event) {
        $('html,body').animate({scrollTop: $(event.target.parentNode).offset().top - 50}, 400, "linear");
    });

    //links going to other sections nicely scroll
    $(".container a").each(function(){
        if ($(this).attr("href").charAt(0) == '#'){
            $(this).on('click', function(event) {
                event.preventDefault();
                var target = $(event.target).closest("a");
                var targetHight =  $(target.attr("href")).offset().top
                $('html,body').animate({scrollTop: targetHight - 170}, 800, "easeInOutExpo");
            });
        }
    });

  // DOM element where the Timeline will be attached
  var container = document.getElementById('visualization');

  // add your project here with the following format
  //
  // '<groupname> : [
  //    { content:'<text>', start: <date>, end: <date>, py2:<true|false>},
  //    ...
  // ]
  //
  //  The placement of projects in the data does not matter.
  //  They will be sorted alphabetically
  //
  var data = {
    'CPython':[
      {content:'Python 2.7', start: '2010-07-03', end: '2020-01-01', py2:true},
      {content:'Python 3.3', start: '2012-09-29', end: '2017-09-29'},
      {content:'Python 3.4', start: '2014-03-16', end: '2019-03-19'},
      // EOL for Python 3.5 - 3.7 not announced yet; project 5 years from initial release to follow CPython policy.
      {content:'Python 3.5', start: '2015-09-13', end: '2020-09-13'},
      {content:'Python 3.6', start: '2016-12-23', end: '2021-12-23'},
      {content:'Python 3.7', start: '2018-06-27', end: '2023-06-27'},
    ],
    'IPython':[
      {content: '1.x', start: '2013-08-08', end:'2014-03-31', py2:true},
      {content: '2.x', start: '2014-04-01', end:'2015-02-26', py2:true},
      {content: '3.x', start: '2015-02-27', end:'2015-08-10', py2:true},
      {content: '4.x', start: '2015-08-11', end:'2016-07-07', py2:true},
      {content: 'IPython 5.x LTS', start: '2016-07-08', end:'2019-06-01', py2:true},
      {content: '6.x', start: '2017-04-19', end:'2018-09-27'},
      {content: '7.x', start: '2018-09-27', end:'2019-12-12'},
      {content: '8.x', start: '2019-12-12', end:'2020-12-01'},
    ],
    'pandas':[
      {content: 'Python 2 & 3', start: '2011-10-10', end:'2018-12-31', py2:true},
      {content: 'Python 3 only', start: '2019-01-01', end:'2021-12-16'},
    ],
    'scikit-learn':[
      {content: 'Python 2 & 3', start: '2010-03-25', end:'2019-03-18', py2:true},
      {content: 'Python 3 only', start: '2019-03-19', end:'2023-12-31'},
    ],
    'XGBoost':[
      {content: 'Python 2 & 3', start: '2016-01-14', end:'2019-05-15', py2:true},
      {content: 'Python 3 only', start: '2019-05-15', end:'2023-12-31'},
    ],
    'ccxt':[
      {content: 'Python 2 & 3', start: '2017-05-14', end:'2019-12-31', py2:true},
      {content: 'Python 3 only', start: '2020-01-01', end:'2023-12-31'},
    ],
    'Numpy':[
      {content: 'Py 2 & 3 full', start: '2010-08-31', end:'2018-12-31', py2:true},
      {content: 'Py 2 bug fix', start: '2019-01-01', end:'2019-12-31', py2:true},
      {content: 'Py 3 full', start: '2019-01-01', end:'2021-12-16'},
    ],
    'Pillow':[
      {content: 'Python 2 & 3', start: '2013-03-15', end:'2019-12-31', py2:true},
      {content: 'Python 3 only', start: '2020-01-01', end:'2023-12-31'},
    ],
    'PyInstaller':[
      {content: 'Python 2.7', start: '2011-05-05', end:'2019-12-31', py2:true},
      {content: 'Python 3.3', start: '2015-10-04', end:'2018-09-09'},
      {content: 'Python 3.4', start: '2015-10-04', end:'2019-07-09'},
      // EOL for Python 3.5 - 3.7 not announced yet; project 5 years
      // from initial release to follow CPython policy.
      {content: 'Python 3.5', start: '2015-10-04', end:'2020-09-30'},
      {content: 'Python 3.6', start: '2017-09-21', end:'2021-12-31'},
      {content: 'Python 3.7', start: '2018-09-09', end:'2023-06-30'},
    ],
    'Scipy':[
      {content: 'Py 2 & 3 full', start: '2010-08-31', end:'2018-12-31', py2:true},
      {content: 'Py 2 bug fix', start: '2019-01-01', end:'2019-12-31', py2:true},
      {content: 'Py 3 full', start: '2019-01-01', end:'2021-12-16'},
    ],
    'Matplotlib':[
        {content: '2.2 LTS', start: '2018-03-05', end: '2020-01-10', py2:true},
        {content: '3.0', start: '2018-07-01', end: '2019-01-01'},
        {content: '3.1', start: '2019-01-01', end: '2019-07-01'},
        {content: '3.2', start: '2019-07-01', end: '2020-01-01'}
    ],
    'Spyder':[
        {content: '3', start: '2016-09-24', end: '2019-01-15', py2:true},
        {content: '4', start: '2019-01-15', end: '2020-01-01', py2:true},
        {content: '5', start: '2019-12-31', end: '2021-12-16'}
    ],
    'Xonsh':[
      {content: '0.x series – Python 3.4+', start: '2015-03-09', end: '2021-12-16'},
    ],
    'scikit-bio':[
      {content: '0.1.1 - 0.4.2', start: '2014-05-16', end: '2016-05-30', py2:true},
      {content: '0.5.0+', start: '2016-05-31', end: '2021-12-16'},
    ],
    'QIIME':[
      {content: '1.x', start: '2010-04-09', end: '2017-12-31', py2:true},
      {content: '2.x+', start: '2016-07-11', end: '2021-12-16'},
    ],
    'SunPy':[
      {content: '0.7', start: '2016-05-24', end: '2017-08-07', py2:true},
      {content: '0.8', start: '2017-08-07', end: '2018-04-23', py2:true},
      {content: '0.9', start: '2018-04-23', end: '2020-01-01', py2:true},
      {content: '1.0', start: '2019-01-01', end: '2020-01-01'},
      {content: '1.1', start: '2020-01-01', end: '2020-06-01'},
    ],
    'Astropy':[
      {content: '1.0 LTS', start: '2015-02-19', end: '2017-06-01', py2:true},
      {content: '1.1', start: '2015-12-11', end: '2016-06-23', py2:true},
      {content: '1.2', start: '2016-06-23', end: '2016-12-16', py2:true},
      {content: '1.3', start: '2016-12-16', end: '2017-06-01', py2:true},
      {content: '2.0 LTS', start: '2017-06-01', end: '2019-12-31', py2:true},
      {content: '3.0', start: '2018-02-19', end: '2018-11-30'},
      {content: '3.1', start: '2018-11-30', end: '2019-05-01'},
      {content: '3.2', start: '2019-05-01', end: '2019-11-30'},
      {content: '4.0 LTS', start: '2019-11-30', end: '2021-12-01'},
    ],
    'Sphinx':[
      {content: '0.1 - 1.0 (Py2)', start: '2008-03-22', end:'2011-10-09', py2:true},
      {content: '1.1 - 1.8 (Py2,Py3)', start: '2011-10-10', end:'2019-03-28', py2:true},
      {content: '2.0 - (Py3)', start: '2019-03-29', end:'2023-12-31'},
    ],
    'Apache Libcloud':[
      {content: 'Python 2 & 3', start: '2011-12-09', end:'2020-01-01', py2:true},
      {content: 'Python 3 only', start: '2020-01-01', end:'2023-12-31'},
    ],
    'geopy':[
      {content: '1.x', start: '2014-09-07', end:'2019-04-01', py2:true},
      {content: '2.x', start: '2019-04-01', end:'2023-12-31'},
    ],
    'Weblate':[
      {content: '0.1 - 2.4 (Py2)', start: '2008-03-22', end:'2016-03-10', py2:true},
      {content: '2.5 - 3.11 (Py2,Py3)', start: '2016-03-10', end:'2020-04-01', py2:true},
      {content: '4.0 - (Py3)', start: '2020-04-01', end:'2023-12-31'},
    ],
    'Tryton':[
      {content: '4.0', start: '2016-05-02', end: '2018-10-01', py2:true},
      {content: '4.2', start: '2016-11-28', end: '2019-05-01', py2:true},
      {content: '4.4', start: '2017-05-01', end: '2019-10-01', py2:true},
      {content: '4.6', start: '2017-10-30', end: '2020-05-01', py2:true},
      {content: '4.8', start: '2018-04-23', end: '2020-10-01', py2:true},
      {content: '5.0', start: '2018-10-01', end: '2023-10-01'},
      {content: '5.2', start: '2019-05-01', end: '2020-05-01'},
    ],
    'osBrain':[
      {content: '0.x', start: '2016-07-01', end: '2021-12-16'},
    ],
    'PyMeasure':[
      {content: '0.4', start: '2016-07-29', end: '2017-10-18'},
      {content: '0.5', start: '2017-10-18', end: '2019-01-14'},
      {content: '0.6', start: '2019-01-14', end: '2020-01-01'},
    ],
    'TatSu':[
      {content: 'Python 2 & 3', start: '2017-01-01', end:'2019-04-01', py2:true},
      {content: 'Python 2 & 3 fixes', start: '2019-04-01', end:'2020-01-01', py2:true},
      {content: 'Python 3 only', start: '2019-04-01', end:'2023-12-31'},
    ],
    'rpy2':[
      {content: '2.8.x', start: '2016-12-21', end:'2018-12-21', py2:true},
      {content: '2.9.x', start: '2017-07-14', end:'2018-07-14'},
    ],
    'FEniCS':[
        {content: '2017.1.0', start: '2017-05-12', end: '2017-12-31', py2:true},
        {content: '2018.1.0', start: '2018-01-01', end: '2018-06-01'}
    ],
    'RDKit':[
        {content: '2014.9.1 - 2019.03.1', start: '2014-09-1', end: '2019-09-1', py2:true},
        {content: '2019.9.1 -' , start: '2019-09-01', end: '2021-03-01'}
    ],
    'Toyplot':[
      {content: 'Python 2 & 3', start: '2014-11-05', end:'2018-12-31', py2:true},
      {content: 'Python 3 only', start: '2019-01-01', end:'2021-12-31'},
    ],
    'music21':[
        {content: 'v3', start: '2016-08-22', end: '2017-08-06', py2:true},
        {content: 'v4', start: '2017-08-22', end: '2019-06-01', py2:true},
        {content: 'v5', start: '2018-03-17', end: '2019-08-01'},
        {content: 'v6', start: '2019-06-01', end: '2020-08-01'},
    ],
    'mitmproxy':[
        {content: '0.18.x', start: '2016-10-16', end: '2017-10-16', py2:true},
        {content: '1.0.x -', start: '2016-12-26', end: '2021-12-23'}
    ],
    'SPADE':[
        {content: '2.0', start: '2010-08-01', end: '2012-11-09', py2:true},
        {content: '2.1', start: '2012-11-09', end: '2013-05-27', py2:true},
        {content: '2.2', start: '2013-05-27', end: '2017-06-09', py2:true},
        {content: '2.3', start: '2017-06-09', end: '2018-12-31', py2:true},
        {content: '3.x -', start: '2018-09-15', end: '2020-12-31', py2:false}
    ],
    'dateutil': [
        {content: '2.x', start: '2011-12-01', end: '2018-09-01', py2:true},
        {content: '3.x', start: '2018-09-01', end: '2019-07-01', py2:true},
        {content: '4.x', start: '2019-01-01', end: '2020-07-01', py2:false},
    ],
    'CherryPy': [
        {content: '3.2-17.x', start: '2011-02-25', end: '2019-12-31', py2: true},
        {content: '18.x+', start: '2018-09-01', end: '2023-12-31', py2: false},
    ],
    'stomp.py':[
      {content: '3.x', start: '2010-04-01', end: '2013-09-30', py2:true},
      {content: '4.x', start: '2013-10-01', end: '2020-01-09', py2:true},
      {content: '5.x+', start: '2020-01-10', end: '2023-12-31', py2:false},
    ],
    'cmd2':[
        {content: '0.7.x', start: '2017-02-23', end: '2018-01-04', py2:true},
        {content: '0.8.x', start: '2018-02-01', end: '2018-08-31', py2:true},
        {content: '0.9.x', start: '2018-05-28', end: '2023-12-31', py2:false},
      ],
    'angr':[
        {content: '7.x', start: '2017-09-09', end: '2018-09-26', py2: true},
        {content: '8.x', start: '2018-09-28', end: '2023-12-31', py2: false},
    ],
    'FontTools':[
      {content: 'Py 2 & 3 full', start: '2014-09-24', end:'2018-12-31', py2:true},
      {content: 'Py 2 bug fix', start: '2019-01-01', end:'2019-06-30', py2:true},
      {content: 'Py 3 full', start: '2019-01-01', end:'2023-12-31'},
    ],
    'plyara':[
      {content: '2.x', start: '2019-02-01', end:'2020-01-01'},
    ],
    'marshmallow':[
      {content: '2.x', start: '2015-09-25', end:'2020-01-01', py2:true},
      {content: '3.x', start: '2019-05-05', end:'2023-12-31'},
    ],
    'eml_parser':[
      {content: '2.x', start: '2014-12-08', end:'2017-05-08', py2:true},
      {content: '3.x', start: '2014-12-08', end:'2023-12-31'},
    ],
    'pyapp': [
      {content: '0.1-3.x', start: '2017-01-28', end: '2020-01-01', py2:true},
      {content: '4.x', start: '2019-05-28', end: '2024-05-28', py2:false},
    ],
    'odin': [
      {content: '0.4-1.x', start: '2013-11-30', end: '2020-01-01', py2:true},
      {content: '2.x', start: '2019-11-30', end: '2024-11-30', py2:false},
    ],
    'Apache Spark': [
      {content: 'Python 2 & 3', start: '2015-07-15', end: '2020-04-01', py2:true},
      {content: 'Python 3 only', start: '2020-04-01', end: '2023-12-31'},
    ],
    'Iris': [
      {content: '1.x', start: '2015-12-10', end: '2018-02-14', py2:true},
      {content: '2.x', start: '2018-02-14', end: '2019-12-31', py2:true},
      {content: '3.x', start: '2019-11-05', end: '2023-12-31', py2:false},
    ],
    'ESMValTool': [
      {content: '2.x', start: '2017-09-14', end: '2019-03-07', py2:true},
      {content: '2.x', start: '2019-03-07', end: '2023-12-31', py2:false},
    ],
    'Dask': [
      {content: '1', start: '2014-12-21', end: '2019-07-01', py2:true},
      {content: '2', start: '2019-11-30', end: '2024-11-30', py2:false},
    ],
    'Cylc': [
      {content: 'cylc-3.0.x - cylc-7.8.x', start: '2011-05-26', end: '2020-06-30', py2:true},
      {content: '8-&alpha;', start: '2019-12-01', end: '2020-12-31', py2:false},
      {content: '8.x', start: '2020-06-30', end: '2021-12-31', py2:false},
      {content: '9.x', start: '2021-06-30', end: '2022-12-31', py2:false},
    ],
    'Neural Network Libraries': [
      { content:'Python 2 & 3', start: '2017-07-22', end: '2019-12-31', py2:true},
      { content:'Python 3 only', start: '2020-01-01', end: '2023-12-31', py2:false},
    ],
    'lib3to6': [
      { content:'Python 3 only', start: '2018-09-01', end: '2023-12-31', py2:false},
    ],
    'Connectome Mapper 3':[
      {content: 'v3.x beta series (Py2 only)', start: '2019-04-24', end:'2020-08-24', py2:true},
      {content: 'v3.x series (Py3 only)', start: '2020-08-24', end:'2023-12-31'},
    ]

    // for tests, rando example
    //'matplotlib':[
    //  {content: 'matplotlib 2.x', start: '2015-06-01', end:'2018-06-01', py2:true},
    //  {content: 'matplotlib 3.x', start: '2018-06-12', end:'2019-12-01'},
    //],
    //'scikit-bio':[
    //  {content: '0.18', start: '2016-05-01', end:'2016-11-01', py2:true},
    //  {content: '0.19', start: '2016-11-02', end:'2017-12-01'},
    //]

  }

  // Create a DataSet (allows two way data-binding)
  var items = new vis.DataSet([]);

  // put the data in alphabetical order, except CPython at top.
  var ordered = {};
  Object.keys(data).sort(function (a, b) {
	  if (a == 'CPython') return -1;
	  if (b == 'CPython') return 1;
	  return a.toLowerCase().localeCompare(b.toLowerCase());
      }).forEach(function(key) { ordered[key] = data[key] });
  data = ordered;

  var groups = new vis.DataSet();
  var g=0;
  var i=0;
  for (var gname in data) {
    g++;
    groups.add({id: g, content: gname});
    gr = data[gname];
    for(var k in gr){
      i++;
      gr[k].id = i;
      gr[k].group = g;
      if(gr[k].py2) gr[k].className ='py2'
      items.add(gr[k])
    }
  }

  // Configuration for the Timeline
  var options = {};

  var options = {
    clickToUse: true,
    groupOrder: 'group'
  };

  // Create a Timeline
  var timeline = new vis.Timeline(container, items, options);
  timeline.setGroups(groups);
  timeline.setItems(items);
  timeline.addCustomTime(Date.parse('2020-01-01'))

});