var q = d3.queue()
    .defer(d3.csv, 'tree-nz-govt.csv')
    .await(visualize);

var sf = 3.8,
    c = d3.conventions({
      parentSel: d3.select('#chart'),
      width: 1500,
      height: 3200
    });

var tree = d3.tree()
    .size([c.height, c.width - 120]);

function visualize(errors, data) {

  var g = c.svg.append("g").attr("transform", "translate(40,0)");

  var root = d3.stratify()
    .id(function(d) { return d.id; })
    .parentId(function(d) { return d.parent_id; })
    (data);

    root
      .sum(function(d) { return d.value; })
      .sort(function(a, b) { return b.height - a.height || a.id.localeCompare(b.id); });

  tree(root);

  var link = g.selectAll(".link")
      .data(root.descendants().slice(1))
    .enter().append("path")
      .attr("class", "link")
      .attr("fill", "none")
      .attr("stroke", "#e1e1e1")
      .attr("stroke-width", 1.5)
      .attr("d", function(d) {
        return "M" + d.y + "," + d.x
            + "C" + (d.y + d.parent.y) / 2 + "," + d.x
            + " " + (d.y + d.parent.y) / 2 + "," + d.parent.x
            + " " + d.parent.y + "," + d.parent.x;
      });

  var node = g.selectAll(".node")
      .data(root.descendants())
    .enter().append("g")
      .attr("class", function(d) { return "node" + (d.children ? " node--internal" : " node--leaf"); })
      .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; })

  node.append("circle")
      .attr("fill", function(d) {
        if (d.data.type == 'sector') { return '#666'}
        else { return '#ccc'}
      })
      .attr("r", 1.8);



  node.append("text")
        .attr("font-size", 10)
        .attr("dy", 3)
        .attr("x", function(d) { return d.children ? -8 : 8; })
        .attr("class", function(d) { return d.data.type; })
        .style("text-anchor", function(d) { return d.children ? "end" : "start"; })
        .text(function(d) {
          if (d.data.type == 'organisation') { return d.data.name;}
          else {return d.data.name;}

        });
};