function qs(key) {
    key = key.replace(/[*+?^$.\[\]{}()|\\\/]/g, "\\$&"); // escape RegEx meta chars
    var match = location.search.match(new RegExp("[?&]"+key+"=([^&]+)(&|$)"));
    return match && decodeURIComponent(match[1].replace(/\+/g, " "));
}

$(document).ready(function(){
  var currentHighchart;

  // setup a function to grab the nodeStats
  function getNodeStats() {
    
    var uuid = qs("uuid");
    
    $.getJSON("/nodes/" + uuid + ".json", function(json){
      
      // update the table header with the right node type
      $('#stats-lead h3').html(json.node_type + " stats (" + uuid + ")");
      
      delete json.node_type;
      
      var stats = JsonHuman.format(json);

      $('#stats-container').html(stats);
      if (currentHighchart) {
        // get the current time to set with the point
        var x = (new Date()).getTime();

        // get the last value using underscore-keypath
        var y = _(json).valueForKeyPath(graphKeypath); 
        
        // start shifting the chart once we hit 20 data points
        var shift = currentHighchart.series[0].data.length > 20;
        currentHighchart.series[0].addPoint([x, y], true, shift);
      } 
    }).fail(function(data) {
      $('#stats-container th').each(function(){
        $(this).addClass('stale');
      });
    });    
  }
  
  // do the first GET on page load
  getNodeStats();
  // grab the new assignments JSON every second
  var getNodeStatsInterval = setInterval(getNodeStats, 1000);
  
  var graphKeypath = "";
  
  // set the global Highcharts option
  Highcharts.setOptions({
    global: {
      useUTC: false
    }
  });
  
  // add a function to help create the graph modal
  function createGraphModal() {
    var chartModal = bootbox.dialog({
      title: graphKeypath,
      message: "<div id='highchart-container'></div>",
      buttons: {},
      className: 'highchart-modal'
    });

    chartModal.on('hidden.bs.modal', function(e) {
      currentHighchart.destroy();
      currentHighchart = null;
    }); 

    currentHighchart = new Highcharts.Chart({
      chart: {
        renderTo: 'highchart-container',
        defaultSeriesType: 'line'
      },
      title: {
        text: ''
      },
      xAxis: {
        type: 'datetime',
        tickPixelInterval: 150
      },
      yAxis: {
        title: {
          text: 'Value'
        }
      },
      legend: {
        enabled: false
      },
      series: [{
        name: graphKeypath,
        data: []
      }]
    });
  }
 
  // handle clicks on numerical values - this lets the user show a line graph in a modal
  $('#stats-container').on('click', '.jh-type-number', function(){
    graphKeypath = $(this).data('keypath');
    
    // setup the new graph modal
    createGraphModal();
  });
});