// JS
var chart;

JSC.fetch('./resources/USCrimeRate.csv')
  .then(function(response) {
    return response.text();
  })
  .then(function(text) {
    var data = JSC.csv2Json(text);
    chart = renderChart(data, 'Total Crime');
  });

function renderChart(data, type) {
  return JSC.chart('chartDiv', {
    type: 'bubble',
    annotations: [
      {
        label: {
          style_fontSize: '15px',
          text: 'US Crime Rate'
        },
        position: 'top left'
      }
    ],
    animation_duration: 500,
    legend: {
      template: '%checkbox,%icon,%name',
      position: 'inside left top'
    },
    yAxis: {
      label_text: 'Crime Rate (per 100k people)',
      defaultTick_label_width: 40,
      alternateGridFill: 'none'
    },
    xAxis: {
      label_text: 'Unemployment Rate',
      defaultTick_label_text: '%value%'
    },
    defaultPoint: {
      tooltip:
        '<b>%state</b><br>%xAxisLabel: <b>%xValue</b><br>%yAxisLabel: <b>{%yValue:n1}</b><br>Population: <b>%zValue</b>',
      opacity: 0.8
    },
    series: makeSeries(data, type),
    toolbar_items: {
      'Crime Type': {
        position: 'top right',
        label_text: '',
        events_change: function(val) {
          updateSeries(data, val);
        },
        itemsBox: {
          layout: 'horizontal',
          visible: true,
          margin_top: 5
        },
        defaultItem_type: 'radio',
        value: 'Total Crime',
        items: {
          'Total Crime': {},
          'Violent Crime': {},
          'Property Crime': {}
        }
      }
    }
  });
}

function updateSeries(data, type) {
  var series = makeSeries(data, type);
  series.forEach(function(s) {
    chart
      .series(s.name)
      .options({ points: s.points }, false);
  });
  chart.redraw();
}

function makeSeries(data, type) {
  var series;
  switch (type) {
    case 'Total Crime':
      series = JSC.nest()
        .key('region')
        .key('state')
        .pointRollup(function(key, val) {
          var values = val[0];
          return {
            id: key,
            x: values.unemployment_rate,
            y:
              values.violent_rate +
              values.property_rate,
            z: values.population,
            attributes_state: key
          };
        })
        .series(data);
      break;

    case 'Violent Crime':
      series = JSC.nest()
        .key('region')
        .key('state')
        .pointRollup(function(key, val) {
          var values = val[0];
          return {
            id: key,
            x: values.unemployment_rate,
            y: values.violent_rate,
            z: values.population,
            attributes_state: key
          };
        })
        .series(data);
      break;

    case 'Property Crime':
      series = JSC.nest()
        .key('region')
        .key('state')
        .pointRollup(function(key, val) {
          var values = val[0];
          return {
            id: key,
            x: values.unemployment_rate,
            y: values.property_rate,
            z: values.population,
            attributes_state: key
          };
        })
        .series(data);
      break;
  }
  series.forEach(function(s) {
    s.id = s.name;
  });
  return series;
}