/*
    GV - GeneValidator's JavaScript module

    Define a global GV (acronym for GeneValidator) object containing all
    GV associated methods:
*/

//define global GV object
var GV;
if (!GV) {
    GV = {};
}

//GV module
(function () {
  'use strict';
  /*global window:false, $:false, d3:false*/
  //  SHOW ALL PLOTS button
  GV.toggleAllPlots = function (btn) {
    if (window.chrome && (window.location.protocol === 'file:')){
      $('#browseralert').modal();
    } else {
      var plotBtns = $('.plot_btn');
      if (plotBtns.length > 30){
        $('#alert').modal();
      } else {
        $('#spinner1').modal({ backdrop: 'static', keyboard: 'false' });
        if (btn.status !== 'pressed'){
          btn.status = 'pressed';
          $('#show_all_plots').html('Hide All Charts');
          GV.showAllPlots();
        } else {
          btn.status = 'released';
          $('#show_all_plots').html('Show All Charts');
          GV.removeAllPlots();
        }
        $('#spinner1').modal('hide');      // remove activity spinner
      }
    }
  };

  //iterate over the plot_btns and add data to each childRow
  GV.showAllPlots = function () {
    $('.plot_btn').each (function(){
      if (this.status !== 'pressed') {
        GV.addData(this, 'all');
      }
    });
  };

  GV.removeAllPlots = function () {
    $('.tablesorter-childRow').each (function(){
      $(this).remove();
    });
    $('.plot_btn').each (function(){
      this.status = 'released';
    });
  };

  GV.addData = function (source, val){
    if (window.chrome && (window.location.protocol === 'file:')){
      $('#browseralert').modal();
    } else {
      var $currentRow = $(source).closest('tr'),
          target      = $currentRow.attr("data-target"),
          $childRow   = $('#mainrow' + target);

      if ($childRow.length && source.status !== 'pressed') {
        // if you click on another td...
        GV.emptyChildRow($currentRow, target, source);
        GV.addDataToChildRow($currentRow, target, val);
      } else if ($childRow.length === 0){
        GV.createChildRow($currentRow, target, source);
        GV.addDataToChildRow($currentRow, target, val);
      } else if ($childRow.length) {
        GV.removeChildRow($currentRow, $childRow, source);
      }

      $('table').trigger('update');
    }
  };

  GV.toggleOverviewBtn = function () {
    if (window.chrome && (window.location.protocol === 'file:')){
      $('#overview').remove();
    } else {
      var jsonFile = $("#overview_btn").data('overviewjson');
      $.getJSON(jsonFile, function( json ) {
        var overview = $('<span>' + json.less + '</span><br>');
        var full_overview  = $('<span>' + json.evaluation + '</span><br>');
        if ( $('#overview_btn').hasClass('active')){
          $('#overview_text').html(full_overview);
          $('#overview_btn').text('Show Less');
          GV.addPlot(json.data, 'overview', json.type, json.title, json.footer, json.xtitle, json.ytitle);
        } else {
          $('#overview').find('svg').remove();
          $('#overview_text').html(overview);
          $('#overview_btn').text('Show More');
        }
      });
    }
  };

  GV.createChildRow = function ($currentRow, target, source) {
    var childRowHTML = '<tr class="tablesorter-childRow" id="mainrow' + target +
                       '"><td colspan="12" id="row' + target + '"><div id="' +
                       target + '" class="expanded-child"></div></td></tr>';
    $currentRow.addClass('tablesorter-hasChildRow');
    $currentRow.after(childRowHTML);
    source.status = 'pressed';
  };

  GV.removeChildRow = function ($currentRow, $childRow, source) {
    $currentRow.removeClass('tablesorter-hasChildRow');
    $childRow.remove();
    source.status = 'released';
  };

  GV.emptyChildRow = function ($currentRow, target, source) {
    var targetId = '#' + target;
    var explanationId = '#' + target + 'explanation';
    $(targetId).empty();
    $(explanationId).remove();
    GV.resetStatusOfOtherButtons($currentRow);
    source.status = 'pressed';
  };

  GV.resetStatusOfOtherButtons = function ($currentRow) {
    $currentRow.find('td').each (function(){
      if (this.status == 'pressed') { this.status = 'released'; }
    });
    $currentRow.find('.plot_btn').each (function(){
      if (this.status == 'pressed') { this.status = 'released'; }
    });
  };

  GV.addDataToChildRow = function ($currentRow, target, val) {
    var file = $currentRow.attr("data-jsonFile");

    $.getJSON(file, function( json ) {
      if (val === 'all'){
        for (var i in json.validations){
          if (json.validations[i].graphs !== undefined) {
            GV.generatePlotCommands(json.validations[i].graphs, target);
          }
        }
      } else {
        GV.addExplanation(target, json.validations[val]);
        if (json.validations[val].graphs !== undefined) {
          GV.generatePlotCommands(json.validations[val].graphs, target);
        }
      }
    });
  };

  GV.generatePlotCommands = function (graphs, target)  {
    for (var g = 0; g < graphs.length; g++) {
      var graphData = graphs[g];
      GV.addPlot(graphData.data, target, graphData.type, graphData.title,
                 graphData.footer, graphData.xtitle, graphData.ytitle,
                 graphData.aux1, graphData.aux2);
    }
  };

  GV.addExplanation = function (target, jsonData) {
    var row = '#row' + target;
    var approach_html = '<p><b>Approach:</b> ' + jsonData.approach + '</p>';
    var explanation_html = '<p><b>Explanation:</b> ' + jsonData.explanation + '</p>';
    var conclusion_html = '<p><b>Conclusion:</b> ' + jsonData.conclusion + '</p>';

    var explain = $('<div id="' + target + 'explanation" class="alert alert-info explanation_alert" role="alert">' +
                  approach_html + explanation_html + conclusion_html + '</div>');
    $(row).prepend(explain);
  };


// Functions that produce the plots in D3
  GV.addPlot = function (jsonData, target, type, title, footer, xtitle, ytitle, aux1, aux2) {
    var legend;
    if (footer === '') {
      legend = [];
    } else {
      legend = footer.split(';');
    }

    switch(type) {
      case 'scatter':
        GV.plot_scatter(jsonData, target, title, footer, xtitle, ytitle, aux1, aux2);
        break;
      case 'bars':
        GV.plot_bars(jsonData, target, title, legend, xtitle, ytitle, aux1);
        break;
      case 'simplebars':
        GV.plot_simple_bars(jsonData, target, title, legend, xtitle, ytitle);
        break;
      case 'lines':
        if (aux2 !== null) {
          aux2 = aux2.split(',');
        }
        GV.plot_lines(jsonData, target, title, legend, xtitle, ytitle, aux1, aux2);
        break;
      case 'align':
        if (aux2 !== null) {
          aux2 = aux2.split(',');
        }
        GV.plot_align(jsonData, target, title, legend, xtitle, ytitle, aux1, aux2);
        break;
      default:
        break;
    }
  };

  GV.color_beautification = function (color) {
    switch(color){
      case 'red':
        return d3.rgb(189,54,47);
      case 'blue':
        return d3.rgb(58,135,173);
      case 'green':
        return d3.rgb(70,136,71);
      case 'yellow':
        return d3.rgb(255,255,51);
      case 'orange':
        return d3.rgb(248,148,6);
      case 'violet':
        return d3.rgb(153,0,153);
      case 'gray':
        return d3.rgb(160,160,160);
      default:
        return color;
    }
  };

  // bars plot
  GV.plot_bars = function (alldata, target, title, footer, xTitle, yTitle, bar) {
    var margin = {top: 70, right: 50, bottom: 75, left: 50},
      width = 600 - margin.left - margin.right,
      height = 500 - margin.top - margin.bottom;

    var svg = d3.select("#".concat(target)).append("svg")
      .attr("width", width + margin.left + margin.right)
      .attr("height", height + margin.top + margin.bottom)
      .append("g")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    svg.append("text")
      .attr("x", (width / 2))
      .attr("y", -45)
      .attr("text-anchor", "middle")
      .style("font-size", "16px")
      .text(title);

    var padding = 100;

    var flattened_data = [].concat.apply([], alldata);
    var yMax = d3.max(flattened_data, function(d) { return d.value; }) + 3;
    var y = d3.scale.linear()
      .domain([0, yMax + yMax/10])
      .range([height, 0]);

    var xMin = d3.min(flattened_data, function(d) { return d.key; });
    if (bar !== undefined){
      xMin = Math.min(xMin, bar);
    }

    var xMax = d3.max(flattened_data, function(d) { return d.key; });
    if (bar !== undefined){
      xMax = Math.max(xMax, bar);
    }

    var x = d3.scale.linear()
      .domain([xMin-padding, xMax+padding])
      .range([13, width]);

    var xAxis = d3.svg.axis()
      .scale(x)
      .orient("bottom")
      .ticks(8);

    var yAxis = d3.svg.axis()
      .scale(y)
      .orient("left")
      .tickFormat(d3.format("d"))
      .ticks(8);

    svg.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + height + ")")
        .call(xAxis)
      .append("text")
        .attr("class", "label")
        .attr("x", (width-xTitle.length)/2-50)
        .attr("y", 35)
        .style("text-anchor", "start")
        .text(xTitle);

     svg.append("g")
         .attr("class", "y axis")
        .call(yAxis)
      .append("text")
        .attr("class", "label")
        .attr("transform", "rotate(-90)")
        .attr("x", -(height+yTitle.length)/2-50)
        .attr("y", -40)
        .style("text-anchor", "start")
        .text(yTitle);

      alldata.map( function(data) {
        svg.selectAll(".bar")
          .data(data)
          .enter().append("rect")
            .attr("x", function(d) { return x(d.key); })
            .attr("width", 6)
            .attr("y", function(d) { return y(d.value); })
            .attr("height", function(d) { return height - y(d.value); })
            .attr("fill", function(d) { if (d.main === true) return GV.color_beautification("red"); return GV.color_beautification("blue");});
      });

      if (bar !== undefined){
        svg.append("rect")
          .attr("x", x(bar))
          .attr("width", 4)
          .attr("y", y(yMax + yMax/10))
          .style("opacity",0.6)
          .attr("height", height - y(yMax + yMax/8))
          .attr("fill", GV.color_beautification("black"));

        svg.append("text")
          .attr("transform", "rotate(-90)")
          .attr("x", -yMax/10 - 35)
          .attr("y", x(bar) - 5)
            .text("query");
          }

    var offset = 0;
    var total_len = 0;
    for (var i = 0; i < footer.length; i++) {
      var array = footer[i].split(",");
      total_len = total_len + array[0].length*8 + 15;
    }

    for (var j = 0; j < footer.length; j++) {

      var footer_array = footer[j].split(",");
      svg.append("rect")
          .attr("x", (width-total_len)/2 + offset)
          .attr("y", -30)
          .attr("width", 10)
          .attr("height", 10)
          .style("fill", GV.color_beautification(footer_array[1].replace(/\s+/g, '')));

      svg.append("text")
          .attr("x", (width-total_len)/2 + offset + 15)
          .attr("y", -20)
          .text(footer_array[0]);
      offset = offset + footer_array[0].length*8 + 15;
    }
  };

  // bars plot
  GV.plot_simple_bars = function (alldata, target, title, footer, xTitle, yTitle) {
    var margin = {top: 70, right: 50, bottom: 75, left: 50},
      width = 600 - margin.left - margin.right,
      height = 500 - margin.top - margin.bottom;

    var svg = d3.select("#".concat(target)).append("svg")
      .attr("width", width + margin.left + margin.right)
      .attr("height", height + margin.top + margin.bottom)
      .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    svg.append("text")
      .attr("x", (width / 2))
      .attr("y", -45)
      .attr("text-anchor", "middle")
      .style("font-size", "16px")
      .text(title);

    var padding = 0;

    var flattened_data = [].concat.apply([], alldata);
    var yMax = d3.max(flattened_data, function(d) { return d.value; }) + 3;
    var y = d3.scale.linear()
           .domain([0, yMax])
           .range([height, 0]);

    var xMin = d3.min(flattened_data, function(d) { return d.key; });
    var xMax = d3.max(flattened_data, function(d) { return d.key; });

    var x = d3.scale.linear()
              .domain([xMin-padding, xMax+padding])
              .range([13, width]);

    var xAxis = d3.svg.axis()
                  .scale(x)
                  .orient("bottom")
                  .ticks(8);

    var yAxis = d3.svg.axis()
                  .scale(y)
                  .orient("left")
                  .tickFormat(d3.format("d"))
                  .ticks(8);

    svg.append("g")
         .attr("class", "x axis")
         .attr("transform", "translate(0," + height + ")")
         .call(xAxis)
       .append("text")
         .attr("class", "label")
         .attr("x", (width-xTitle.length)/2-50)
         .attr("y", 35)
         .style("text-anchor", "start")
         .text(xTitle);

    svg.append("g")
         .attr("class", "y axis")
         .call(yAxis)
       .append("text")
         .attr("class", "label")
         .attr("transform", "rotate(-90)")
         .attr("x", -(height+yTitle.length)/2-50)
         .attr("y", -40)
         .style("text-anchor", "start")
         .text(yTitle);

    alldata.map( function(data) {
      svg.selectAll(".bar")
         .data(data)
         .enter().append("rect")
                 .attr("x", function(d) { return x(d.key); })
                 .attr("width", 6)
                 .attr("y", function(d) { return y(d.value); })
                 .attr("height", function(d) { return height - y(d.value); })
                 .attr("fill", function(d) { if (d.main === true) return GV.color_beautification("red"); return GV.color_beautification("blue");});
    });
  };


  // scatter plot
  // ecuation of the line: slope * x + yLine
  GV.plot_scatter = function (data, target, title, footer, xTitle, yTitle, yLine, slope) {
    var margin = {top: 50, right: 30, bottom: 75, left: 50},
    width = 500 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

    var x = d3.scale.linear()
              .range([0, width]);
    var y = d3.scale.linear()
              .range([height, 0]);

    var color = d3.scale.category10();

    var xAxis = d3.svg.axis()
                  .scale(x)
                  .orient("bottom")
                  .ticks(8);
    var yAxis = d3.svg.axis()
                  .scale(y)
                  .orient("left")
                  .tickFormat(d3.format("d"))
                  .ticks(8);

    var svg = d3.select("#".concat(target)).append("svg")
                  .attr("width", width + margin.left + margin.right)
                  .attr("height", height + margin.top + margin.bottom)
                  .append("g")
                  .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    svg.append("text")
         .attr("x", (width / 2))
         .attr("y", -25)
         .attr("text-anchor", "middle")
         .style("font-size", "16px")
         .text(title);

    svg.append("text")
         .attr("x", (width / 2))
         .attr("y", height+ 55)
         .attr("text-anchor", "middle")
         .style("font-size", "12px")
         .text(footer);

    var xMax = d3.max(data, function(d) { return d.x; });
    var xMin = d3.min(data, function(d) { return d.x; });
    var yMax = d3.max(data, function(d) { return d.y; });
    var yMin = d3.min(data, function(d) { return d.y; });
    x.domain(d3.extent(data, function(d) { return d.x; })).nice();
    y.domain(d3.extent(data, function(d) { return d.y; })).nice();

    svg.append("g")
         .attr("class", "x axis")
         .attr("transform", "translate(0," + height + ")")
         .call(xAxis)
       .append("text")
         .attr("class", "label")
         .attr("x", (width-xTitle.length)/2-50)
         .attr("y", 35)
         .style("text-anchor", "start")
         .text(xTitle);

    svg.append("g")
         .attr("class", "y axis")
         .call(yAxis)
       .append("text")
         .attr("class", "label")
         .attr("transform", "rotate(-90)")
         .attr("x", -(height+yTitle.length)/2-50)
         .attr("y", -40)
         .style("text-anchor", "start")
         .text(yTitle);

    svg.selectAll(".dot")
         .data(data)
       .enter().append("circle")
         .attr("r", 2)
         .attr("cx", function(d) { return x(d.x); })
         .attr("cy", function(d) { return y(d.y); })
         .style("fill", function() { return GV.color_beautification("red"); })
         .style("opacity",0.6);

    if ((slope !== undefined && slope !== "") && (yLine !== undefined && yLine !== "")){
      yLine = parseFloat(yLine.replace(",", "."));
      var xMaxValue = xMax;
      var yMaxValue = yLine + slope * xMax;
      if (yMaxValue > yMax){
        xMaxValue = (yMax-yLine)/slope;
        yMaxValue = yMax;
      }

      if (yMaxValue < yMin){
        xMaxValue = (yMin-yLine)/slope;
        yMaxValue = yMin;
      }

      var xMinValue = xMin;
      var yMinValue = yLine + slope * xMin;
      if (yMinValue > yMax){
        xMinValue = (yMax-yLine)/slope;
        yMinValue = yMin;
      }

      if (yMinValue < yMin){
        xMinValue = (yMin-yLine)/slope;
        yMinValue = yMin;
      }

      svg.append("line")
           .attr("x1", x(xMinValue))
           .attr("y1", y(yMinValue))
           .attr("x2", x(xMaxValue))
           .attr("y2", y(yMaxValue))
           .attr("stroke-width", 2)
           .attr("stroke", "black");
    }
  };

  // line plot
  // maximum 80 lines
  GV.plot_lines = function (data, target, title, footer, xTitle, yTitle, no_lines, yValues) {
    var margin = {top: 70, right: 50, bottom: 75, left: 50},
    width = 600 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

    var x = d3.scale.linear()
              .range([0, width]);
    var y = d3.scale.linear()
              .range([height, 0]);

    var color = d3.scale.category10();
    var xAxis = '';
    if (title === 'Open Reading Frames in all 6 Frames') {
      xAxis = d3.svg.axis()
                    .scale(x)
                    .orient("bottom")
                    .ticks(0);
    } else {
      xAxis = d3.svg.axis()
                    .scale(x)
                    .orient("bottom")
                    .ticks(5);
    }

    var yAxis = d3.svg.axis()
                  .scale(y)
                  .orient("left")
                  .ticks(5);

    var svg = d3.select("#".concat(target)).append("svg")
                .attr("width", width + margin.left + margin.right)
                .attr("height", height + margin.top + margin.bottom)
                .append("g")
                .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    svg.append("text")
         .attr("x", (width / 2))
         .attr("y", -35)
         .attr("text-anchor", "middle")
         .style("font-size", "16px")
         .text(title);

    var idx = -1;

    x.domain([0, d3.max(data, function(d) { return d.stop; })]);
    y.domain(d3.extent(data, function(d) { return d.y; })).nice();

    svg.append("g")
         .attr("class", "x axis")
         .attr("transform", "translate(0," + (height + height/no_lines) + ")")
         .call(xAxis)
       .append("text")
         .attr("class", "label")
         .attr("x", (width-xTitle.length)/2-50)
         .attr("y", 35)
         .style("text-anchor", "start")
         .text(xTitle);

    if (yValues !== null){
      svg.append("g")
           .attr("class", "y axis")
           .call(yAxis.ticks(yValues.length)
                      .tickFormat(function() {
                         idx = idx + 1;
                         return yValues[idx];
                      }))
         .append("text")
           .attr("class", "label")
           .attr("transform", "rotate(-90)")
           .attr("x", -(height+yTitle.length)/2-50)
           .attr("y", -40)
           .style("text-anchor", "start")
           .text(yTitle);
      } else {
        svg.append("g")
             .attr("class", "y axis")
             .call(yAxis)
           .append("text")
             .attr("class", "label")
             .attr("transform", "rotate(-90)")
             .attr("x", -(height+yTitle.length)/2)
             .attr("y", -40)
             .style("text-anchor", "start")
             .text(yTitle);
      }

      svg.selectAll(".dot")
         .data(data)
      .enter().append("line")
              .attr("x1", function(d) { return x(d.start); })
              .attr("y1", function(d) { return y(d.y); })
              .attr("x2", function(d) { return x(d.stop); })
              .attr("x2", function(d) { return x(d.stop); })
              .attr("y2", function(d) { return y(d.y); })
              .attr("stroke-width", function(d) {
                if (d.dotted === undefined) {
                  if (d.color == "red" ) {
                    return height/no_lines/2.5;
                  } else {
                    return height/no_lines;
                  }
                } else {
                  return height/no_lines/5;
                }
              })
              .style("stroke-dasharray", function(d) { if (d.dotted === undefined) return ("0, 0"); return ("2, 6");})
              .attr("stroke", function(d) { return GV.color_beautification(d.color); });

    // add legend
    var legend = svg.append("g")
                    .attr("class", "legend")
                    .attr("height", 100)
                    .attr("width", 100)
                    .attr('transform', 'translate(-20,50)');

    var offset = 40;
    var total_len = 0;
    for (var i = 0; i < footer.length; i++) {
      var array = footer[i].split(",");
      total_len = total_len + array[0].length*8 + 15;
    }

    for (var j = 0; j < footer.length; j++) {
      var footer_array = footer[j].split(",");
      svg.append("rect")
           .attr("x", (width-total_len)/2 + offset)
           .attr("y", -30)
           .attr("width", 10)
           .attr("height", 10)
           .style("fill", GV.color_beautification(footer_array[1].replace(/\s+/g, '')));

      svg.append("text")
           .attr("x", (width-total_len)/2 + offset + 15)
           .attr("y", -20)
           .text(footer_array[0]);
      offset = offset + footer_array[0].length*8 + 15;
    }
  };

  // line plot
  // maximum 80 lines
  GV.plot_align = function (data, target, title, footer, xTitle, yTitle, no_lines, yValues) {
    var margin = {top: 75, right: 50, bottom: 75, left: 150},
    width = 600 - margin.left - margin.right,
    height = 300 - margin.top - margin.bottom;

    var x = d3.scale.linear()
              .range([0, width]);
    var y = d3.scale.linear()
              .range([height, 0]);

    var color = d3.scale.category10();

    var xAxis = d3.svg.axis()
                      .scale(x)
                      .orient("bottom")
                      .ticks(5);

    var yAxis = d3.svg.axis()
                      .scale(y)
                      .orient("left")
                      .ticks(5);

    var svg = d3.select("#".concat(target)).append("svg")
                .style("vertical-align", "top")
                .attr("width", width + margin.left + margin.right)
                .attr("height", height + margin.top + margin.bottom)
                .append("g")
                .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    svg.append("text")
         .attr("x", (width / 2))
         .attr("y", -35)
         .attr("text-anchor", "middle")
         .style("font-size", "16px")
         .text(title);

    var idx = -1;

    x.domain([0, d3.max(data, function(d) { return d.stop; })]);
    y.domain(d3.extent(data, function(d) { return d.y; })).nice();

    svg.append("g")
         .attr("class", "x axis")
         .attr("transform", "translate(0," + (height+height/no_lines) + ")")
         .call(xAxis)
       .append("text")
         .attr("class", "label")
         .attr("x", (width-xTitle.length)/2-50)
         .attr("y", 35)
         .style("text-anchor", "start")
         .text(xTitle);

    if (yValues !== null){
      svg.append("g")
           .attr("class", "y axis")
           .call(yAxis.ticks(yValues.length)
                      .tickFormat(function() {
                        idx = idx + 1;
                        return yValues[idx];
                      }))
           .append("text")
           .attr("class", "label")
           .attr("transform", "rotate(-90)")
           .attr("x", -(height+yTitle.length)/2-50)
           .attr("y", -40)
           .style("text-anchor", "start")
           .text(yTitle);
    } else {
      svg.append("g")
           .attr("class", "y axis")
           .call(yAxis)
         .append("text")
           .attr("class", "label")
           .attr("transform", "rotate(-90)")
           .attr("x", -(height+yTitle.length)/2-50)
           .attr("y", -40)
           .style("text-anchor", "start")
           .text(yTitle);
    }

    svg.selectAll(".dot")
       .data(data)
       .enter().append("line")
                 .attr("x1", function(d) { return x(d.start); })
                 .attr("y1", function(d) { return y(d.y); })
                 .attr("x2", function(d) { return x(d.stop); })
                 .attr("y2", function(d) { return y(d.y); })
                 .attr("stroke-width", function(d) { if (d.height == -1) return height/no_lines; return (height/no_lines * d.height) ; })
                 .attr("stroke", function(d) { return GV.color_beautification(d.color); });

    var offset = 0;
    var total_len = 0;
    for (var i = 0; i < footer.length; i++) {
      var array = footer[i].split(",");
      total_len = total_len + array[0].length*8 + 15;
    }

    for (var j = 0; j < footer.length; j++) {
      var footer_array = footer[j].split(",");
      svg.append("rect")
           .attr("x", (width-total_len)/2 + offset)
           .attr("y", -30)
           .attr("width", 10)
           .attr("height", 10)
           .style("fill", GV.color_beautification(footer_array[1].replace(/\s+/g, '')));

      svg.append("text")
           .attr("x", (width-total_len)/2 + offset + 15)
           .attr("y", -20)
           .text(footer_array[0]);
      offset = offset + footer_array[0].length*8 + 15;
    }
  };
}());