// Generated by CoffeeScript 1.4.0
(function() {
  var RADIUS, arc, height, partition, svg, treechroma, treehue, treelum, vis, width, zoom, zoomable_layer;

  treehue = function(node, hue_range, fraction, rev) {
    var child, child_hue_ranges, half_n, i, n, r, ri, _i, _j, _len, _ref, _results;
    r = hue_range[1] - hue_range[0];
    node.hue = hue_range[0] + r / 2;
    if (node.children != null) {
      n = node.children.length;
      ri = r / n;
      child_hue_ranges = [];
      half_n = Math.floor(n / 2);
      for (i = _i = 0; 0 <= half_n ? _i < half_n : _i > half_n; i = 0 <= half_n ? ++_i : --_i) {
        child_hue_ranges.push([hue_range[0] + ri * i + ri * (1 - fraction) / 2, hue_range[0] + ri * (i + 1) - ri * (1 - fraction) / 2]);
        child_hue_ranges.push([hue_range[0] + ri * (i + half_n) + ri * (1 - fraction) / 2, hue_range[0] + ri * (i + 1 + half_n) - ri * (1 - fraction) / 2]);
      }
      if (n % 2 === 1) {
        child_hue_ranges.push([hue_range[0] + ri * half_n + ri * (1 - fraction) / 2, hue_range[0] + ri * (1 + half_n) - ri * (1 - fraction) / 2]);
      }
      if (rev) {
        child_hue_ranges.reverse();
      }
      _ref = node.children;
      _results = [];
      for (i = _j = 0, _len = _ref.length; _j < _len; i = ++_j) {
        child = _ref[i];
        _results.push(treehue(child, child_hue_ranges[i], fraction, i % 2 === 0));
      }
      return _results;
    }
  };

  treelum = d3.scale.linear().range([80, 10]);

  treechroma = d3.scale.sqrt().range([0, 90]);

  RADIUS = 250;

  partition = d3.layout.partition().sort(null).size([2 * Math.PI, RADIUS * RADIUS]).value(function(node) {
    return node.leaf_count;
  });

  arc = d3.svg.arc().startAngle(function(d) {
    return d.x;
  }).endAngle(function(d) {
    return d.x + d.dx;
  }).innerRadius(function(d) {
    return Math.sqrt(d.y);
  }).outerRadius(function(d) {
    return Math.sqrt(d.y + d.dy);
  });

  svg = d3.select('svg');

  width = svg.node().getBoundingClientRect().width;

  height = svg.node().getBoundingClientRect().height;

  svg.attr({
    viewBox: "" + (-width / 2) + " " + (-height / 2) + " " + width + " " + height
  });

  zoomable_layer = svg.append('g');

  zoom = d3.behavior.zoom().scaleExtent([1, 10]).on('zoom', function() {
    return zoomable_layer.attr({
      transform: "translate(" + (zoom.translate()) + ")scale(" + (zoom.scale()) + ")"
    });
  });

  svg.call(zoom);

  vis = zoomable_layer.append('g');

  d3.json('dbpedia_canonical.json', function(tree) {
    var enter_nodes, nodes;
    treehue(tree, [0, 360], 0.7);
    treelum.domain([0, 5]);
    treechroma.domain([0, 5]);
    vis.datum(tree);
    nodes = vis.selectAll('.node').data(function(t) {
      return partition.nodes(t);
    });
    enter_nodes = nodes.enter().insert('path', 'path').attr({
      "class": 'node',
      d: arc,
      fill: function(n) {
        return d3.hcl(n.hue, treechroma(n.depth), treelum(n.depth));
      }
    });
    enter_nodes.append('title').text(function(node) {
      return node.name.split('/').reverse()[0];
    });
    return vis.append('text').text(function(tree) {
      return tree.name.split('/').reverse()[0];
    }).attr({
      "class": 'label',
      dy: '0.35em'
    });
  });

}).call(this);