<script>
    import { hierarchy, interpolateHcl, interpolateZoom, pack, scaleLinear, transition } from 'd3';
    import data from './circle-pack-data' // or pass data to component as prop
    
    const width = $ChartDocs[0].value; //the outer width of the chart, in pixels
    const height = width; // the outer height of the chart, in pixels
    const margin = $ChartDocs[1].value; //the overall margin between the circle packs to the viewport edge
    const backgroundColor = $ChartDocs[2].value; // the background color of the chart
    const fontSize = $ChartDocs[3].value; //the font size of the text labels

    const color = scaleLinear()
      .domain([0, 5])
      .range(['hsl(152,80%,80%)', 'hsl(228,30%,40%)'])
      .interpolate(interpolateHcl);

    const packFunc = pData => pack()
      .size([width - margin, height - margin])
      .padding(3)
      (hierarchy(pData)
        .sum(d => d.value)
        .sort((a, b) => b.value - a.value));

    const root = packFunc(data);
    let activeFocus = root;
    let view;
    let activeZoomK = width / root.r * 2;
    let activeZoomA = root.x;
    let activeZoomB = root.y;

    const inactiveZoomTo = (v) => {
      activeZoomK = width / v[2];
      view = v;
      activeZoomA = v[0];
      activeZoomB = v[1];
    };

    inactiveZoomTo([root.x, root.y, root.r * 2 + margin]);

    const zoom = (d, e) => {
      e.stopPropagation();
      const activeFocus0 = activeFocus;

      activeFocus = d;

      transition()
        .duration(750)
        .tween('zoom', () => {
          var i = interpolateZoom(view, [activeFocus.x, activeFocus.y, activeFocus.r * 2 + margin]);
          return function(t) { 
            inactiveZoomTo(i(t)); 
          };
        });
    };
</script>

<svg width={width} height={height} style="background: {backgroundColor};" on:click={(e) => zoom(root, e)}   >
    <g transform="translate({width / 2},{height / 2})">
        {#each root.descendants().slice(1) as rootData}
            <!-- svelte-ignore a11y-mouse-events-have-key-events -->
            <circle class={rootData.parent ? rootData.children ? 'node' : 'node node--leaf' : 'node node--root'}
                fill={rootData.children ? color(rootData.depth) : 'null'} 
                on:click={(e) => {if (activeFocus !== rootData) zoom(rootData, e);}}
                transform="translate({(rootData.x - activeZoomA) * activeZoomK},{(rootData.y - activeZoomB) * activeZoomK})"
                r={rootData.r * activeZoomK}
            ></circle>
        {/each}
        {#each root.descendants() as rootDes}
            <text font-size='{fontSize}px' class="label" 
                style="fill-opacity: {rootDes.parent === activeFocus ? 1 : 0}; display: {rootDes.parent === activeFocus ? "inline" : "none"};"
                transform="translate({(rootDes.x - activeZoomA) * activeZoomK},{(rootDes.y - activeZoomB) * activeZoomK})"
            >{rootDes.data.name}</text>
        {/each}
    </g>
</svg>

<style>
.node {
  cursor: pointer;
}

.node:hover {
  stroke: #000;
  stroke-width: 1.5px;
}

.node--leaf {
  fill: white;
}

.label {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  text-anchor: middle;
  text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, -1px 0 0 #fff, 0 -1px 0 #fff;
}

.label,
.node--root,
.node--leaf {
  pointer-events: none;
}
</style>

export default {
    name: 'flare',
    children: [
      {
        name: 'analytics',
        children: [
          {
            name: 'cluster',
            children: [
              { name: 'AgglomerativeCluster', value: 3938 },
              { name: 'CommunityStructure', value: 3812 },
              { name: 'HierarchicalCluster', value: 6714 },
              { name: 'MergeEdge', value: 743 },
            ],
          },
          {
            name: 'graph',
            children: [
              { name: 'BetweennessCentrality', value: 3534 },
              { name: 'LinkDistance', value: 5731 },
              { name: 'MaxFlowMinCut', value: 7840 },
              { name: 'ShortestPaths', value: 5914 },
              { name: 'SpanningTree', value: 3416 },
            ],
          },
          {
            name: 'optimization',
            children: [{ name: 'AspectRatioBanker', value: 7074 }],
          },
        ],
      },
      {
        name: 'animate',
        children: [
          { name: 'Easing', value: 17010 },
          { name: 'FunctionSequence', value: 5842 },
          {
            name: 'interpolate',
            children: [
              { name: 'ArrayInterpolator', value: 1983 },
              { name: 'ColorInterpolator', value: 2047 },
              { name: 'DateInterpolator', value: 1375 },
              { name: 'Interpolator', value: 8746 },
              { name: 'MatrixInterpolator', value: 2202 },
              { name: 'NumberInterpolator', value: 1382 },
              { name: 'ObjectInterpolator', value: 1629 },
              { name: 'PointInterpolator', value: 1675 },
              { name: 'RectangleInterpolator', value: 2042 },
            ],
          },
          { name: 'ISchedulable', value: 1041 },
          { name: 'Parallel', value: 5176 },
          { name: 'Pause', value: 449 },
          { name: 'Scheduler', value: 5593 },
          { name: 'Sequence', value: 5534 },
          { name: 'Transition', value: 9201 },
          { name: 'Transitioner', value: 19975 },
          { name: 'TransitionEvent', value: 1116 },
          { name: 'Tween', value: 6006 },
        ],
      },
      {
        name: 'data',
        children: [
          {
            name: 'converters',
            children: [
              { name: 'Converters', value: 721 },
              { name: 'DelimitedTextConverter', value: 4294 },
              { name: 'GraphMLConverter', value: 9800 },
              { name: 'IDataConverter', value: 1314 },
              { name: 'JSONConverter', value: 2220 },
            ],
          },
          { name: 'DataField', value: 1759 },
          { name: 'DataSchema', value: 2165 },
          { name: 'DataSet', value: 586 },
          { name: 'DataSource', value: 3331 },
          { name: 'DataTable', value: 772 },
          { name: 'DataUtil', value: 3322 },
        ],
      },
      {
        name: 'display',
        children: [
          { name: 'DirtySprite', value: 8833 },
          { name: 'LineSprite', value: 1732 },
          { name: 'RectSprite', value: 3623 },
          { name: 'TextSprite', value: 10066 },
        ],
      },
      { name: 'flex', children: [{ name: 'FlareVis', value: 4116 }] },
      {
        name: 'physics',
        children: [
          { name: 'DragForce', value: 1082 },
          { name: 'GravityForce', value: 1336 },
          { name: 'IForce', value: 319 },
          { name: 'NBodyForce', value: 10498 },
          { name: 'Particle', value: 2822 },
          { name: 'Simulation', value: 9983 },
          { name: 'Spring', value: 2213 },
          { name: 'SpringForce', value: 1681 },
        ],
      },
      {
        name: 'query',
        children: [
          { name: 'AggregateExpression', value: 1616 },
          { name: 'And', value: 1027 },
          { name: 'Arithmetic', value: 3891 },
          { name: 'Average', value: 891 },
          { name: 'BinaryExpression', value: 2893 },
          { name: 'Comparison', value: 5103 },
          { name: 'CompositeExpression', value: 3677 },
          { name: 'Count', value: 781 },
          { name: 'DateUtil', value: 4141 },
          { name: 'Distinct', value: 933 },
          { name: 'Expression', value: 5130 },
          { name: 'ExpressionIterator', value: 3617 },
          { name: 'Fn', value: 3240 },
          { name: 'If', value: 2732 },
          { name: 'IsA', value: 2039 },
          { name: 'Literal', value: 1214 },
          { name: 'Match', value: 3748 },
          { name: 'Maximum', value: 843 },
          {
            name: 'methods',
            children: [
              { name: 'add', value: 593 },
              { name: 'and', value: 330 },
              { name: 'average', value: 287 },
              { name: 'count', value: 277 },
              { name: 'distinct', value: 292 },
              { name: 'div', value: 595 },
              { name: 'eq', value: 594 },
              { name: 'fn', value: 460 },
              { name: 'gt', value: 603 },
              { name: 'gte', value: 625 },
              { name: 'iff', value: 748 },
              { name: 'isa', value: 461 },
              { name: 'lt', value: 597 },
              { name: 'lte', value: 619 },
              { name: 'max', value: 283 },
              { name: 'min', value: 283 },
              { name: 'mod', value: 591 },
              { name: 'mul', value: 603 },
              { name: 'neq', value: 599 },
              { name: 'not', value: 386 },
              { name: 'or', value: 323 },
              { name: 'orderby', value: 307 },
              { name: 'range', value: 772 },
              { name: 'select', value: 296 },
              { name: 'stddev', value: 363 },
              { name: 'sub', value: 600 },
              { name: 'sum', value: 280 },
              { name: 'update', value: 307 },
              { name: 'variance', value: 335 },
              { name: 'where', value: 299 },
              { name: 'xor', value: 354 },
              { name: '_', value: 264 },
            ],
          },
          { name: 'Minimum', value: 843 },
          { name: 'Not', value: 1554 },
          { name: 'Or', value: 970 },
          { name: 'Query', value: 13896 },
          { name: 'Range', value: 1594 },
          { name: 'StringUtil', value: 4130 },
          { name: 'Sum', value: 791 },
          { name: 'Variable', value: 1124 },
          { name: 'Variance', value: 1876 },
          { name: 'Xor', value: 1101 },
        ],
      },
      {
        name: 'scale',
        children: [
          { name: 'IScaleMap', value: 2105 },
          { name: 'LinearScale', value: 1316 },
          { name: 'LogScale', value: 3151 },
          { name: 'OrdinalScale', value: 3770 },
          { name: 'QuantileScale', value: 2435 },
          { name: 'QuantitativeScale', value: 4839 },
          { name: 'RootScale', value: 1756 },
          { name: 'Scale', value: 4268 },
          { name: 'ScaleType', value: 1821 },
          { name: 'TimeScale', value: 5833 },
        ],
      },
      {
        name: 'util',
        children: [
          { name: 'Arrays', value: 8258 },
          { name: 'Colors', value: 10001 },
          { name: 'Dates', value: 8217 },
          { name: 'Displays', value: 12555 },
          { name: 'Filter', value: 2324 },
          { name: 'Geometry', value: 10993 },
          {
            name: 'heap',
            children: [
              { name: 'FibonacciHeap', value: 9354 },
              { name: 'HeapNode', value: 1233 },
            ],
          },
          { name: 'IEvaluable', value: 335 },
          { name: 'IPredicate', value: 383 },
          { name: 'IValueProxy', value: 874 },
          {
            name: 'math',
            children: [
              { name: 'DenseMatrix', value: 3165 },
              { name: 'IMatrix', value: 2815 },
              { name: 'SparseMatrix', value: 3366 },
            ],
          },
          { name: 'Maths', value: 17705 },
          { name: 'Orientation', value: 1486 },
          {
            name: 'palette',
            children: [
              { name: 'ColorPalette', value: 6367 },
              { name: 'Palette', value: 1229 },
              { name: 'ShapePalette', value: 2059 },
              { name: 'SizePalette', value: 2291 },
            ],
          },
          { name: 'Property', value: 5559 },
          { name: 'Shapes', value: 19118 },
          { name: 'Sort', value: 6887 },
          { name: 'Stats', value: 6557 },
          { name: 'Strings', value: 22026 },
        ],
      },
      {
        name: 'vis',
        children: [
          {
            name: 'axis',
            children: [
              { name: 'Axes', value: 1302 },
              { name: 'Axis', value: 24593 },
              { name: 'AxisGridLine', value: 652 },
              { name: 'AxisLabel', value: 636 },
              { name: 'CartesianAxes', value: 6703 },
            ],
          },
          {
            name: 'controls',
            children: [
              { name: 'AnchorControl', value: 2138 },
              { name: 'ClickControl', value: 3824 },
              { name: 'Control', value: 1353 },
              { name: 'ControlList', value: 4665 },
              { name: 'DragControl', value: 2649 },
              { name: 'ExpandControl', value: 2832 },
              { name: 'HoverControl', value: 4896 },
              { name: 'IControl', value: 763 },
              { name: 'PanZoomControl', value: 5222 },
              { name: 'SelectionControl', value: 7862 },
              { name: 'TooltipControl', value: 8435 },
            ],
          },
          {
            name: 'data',
            children: [
              { name: 'Data', value: 20544 },
              { name: 'DataList', value: 19788 },
              { name: 'DataSprite', value: 10349 },
              { name: 'EdgeSprite', value: 3301 },
              { name: 'NodeSprite', value: 19382 },
              {
                name: 'render',
                children: [
                  { name: 'ArrowType', value: 698 },
                  { name: 'EdgeRenderer', value: 5569 },
                  { name: 'IRenderer', value: 353 },
                  { name: 'ShapeRenderer', value: 2247 },
                ],
              },
              { name: 'ScaleBinding', value: 11275 },
              { name: 'Tree', value: 7147 },
              { name: 'TreeBuilder', value: 9930 },
            ],
          },
          {
            name: 'events',
            children: [
              { name: 'DataEvent', value: 2313 },
              { name: 'SelectionEvent', value: 1880 },
              { name: 'TooltipEvent', value: 1701 },
              { name: 'VisualizationEvent', value: 1117 },
            ],
          },
          {
            name: 'legend',
            children: [
              { name: 'Legend', value: 20859 },
              { name: 'LegendItem', value: 4614 },
              { name: 'LegendRange', value: 10530 },
            ],
          },
          {
            name: 'operator',
            children: [
              {
                name: 'distortion',
                children: [
                  { name: 'BifocalDistortion', value: 4461 },
                  { name: 'Distortion', value: 6314 },
                  { name: 'FisheyeDistortion', value: 3444 },
                ],
              },
              {
                name: 'encoder',
                children: [
                  { name: 'ColorEncoder', value: 3179 },
                  { name: 'Encoder', value: 4060 },
                  { name: 'PropertyEncoder', value: 4138 },
                  { name: 'ShapeEncoder', value: 1690 },
                  { name: 'SizeEncoder', value: 1830 },
                ],
              },
              {
                name: 'filter',
                children: [
                  { name: 'FisheyeTreeFilter', value: 5219 },
                  { name: 'GraphDistanceFilter', value: 3165 },
                  { name: 'VisibilityFilter', value: 3509 },
                ],
              },
              { name: 'IOperator', value: 1286 },
              {
                name: 'label',
                children: [
                  { name: 'Labeler', value: 9956 },
                  { name: 'RadialLabeler', value: 3899 },
                  { name: 'StackedAreaLabeler', value: 3202 },
                ],
              },
              {
                name: 'layout',
                children: [
                  { name: 'AxisLayout', value: 6725 },
                  { name: 'BundledEdgeRouter', value: 3727 },
                  { name: 'CircleLayout', value: 9317 },
                  { name: 'CirclePackingLayout', value: 12003 },
                  { name: 'DendrogramLayout', value: 4853 },
                  { name: 'ForceDirectedLayout', value: 8411 },
                  { name: 'IcicleTreeLayout', value: 4864 },
                  { name: 'IndentedTreeLayout', value: 3174 },
                  { name: 'Layout', value: 7881 },
                  { name: 'NodeLinkTreeLayout', value: 12870 },
                  { name: 'PieLayout', value: 2728 },
                  { name: 'RadialTreeLayout', value: 12348 },
                  { name: 'RandomLayout', value: 870 },
                  { name: 'StackedAreaLayout', value: 9121 },
                  { name: 'TreeMapLayout', value: 9191 },
                ],
              },
              { name: 'Operator', value: 2490 },
              { name: 'OperatorList', value: 5248 },
              { name: 'OperatorSequence', value: 4190 },
              { name: 'OperatorSwitch', value: 2581 },
              { name: 'SortOperator', value: 2023 },
            ],
          },
          { name: 'Visualization', value: 16540 },
        ],
      },
    ],
  };

const data = {
      key1: "parent-name",
      key2: [
        {
          key1: "child-parent-name",
          key2: [
            {
              key1: "child-child-parent-name",
              key2: [
                { key1: "child-child-child-child-name", value1: "value" },
                { key2: "child-child-child-child-name", value2: "value" },
                { key3: "child-child-child-child-name", value3: "value" },
                { key4: "child-child-child-child-name", value4: "value" },
                //insert additional child objects
              ]
            },
            //insert additional child objects
          ]
          //insert additional child arrays
        },
        //insert additional child objects
      ]
    }