/*=========================================================================================
    File Name: line.js
    Description: D3 simple line chart
    ----------------------------------------------------------------------------------------
    Item Name: Modern Admin - Clean Bootstrap 4 Dashboard HTML Template
    Author: PIXINVENT
    Author URL: http://www.themeforest.net/user/pixinvent
==========================================================================================*/

// Line chart
// ------------------------------
$(window).on("load", function(){

    var ele = d3.select("#sunburst-partition"),
    width = ele.node().getBoundingClientRect().width,
    height = 400,
    radius = Math.min(width, height) / 2;

    // Color
    var color = d3.scale.ordinal()
        .range(["#99B898", "#FECEA8", "#FF847C", "#E84A5F", "#C06C84", "#6C5B7B", "#355C7D"]);

    var svg = ele.append("svg")
        .attr("width", width)
        .attr("height", height)
      .append("g")
        .attr("transform", "translate(" + width / 2 + "," + height * .52 + ")");

    var partition = d3.layout.partition()
        .sort(null)
        .size([2 * Math.PI, radius * radius])
        .value(function(d) { return 1; });

    var 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); });

    d3.json("../../../app-assets/data/d3/circle/flare.json", function(error, root) {
      if (error) throw error;

      var path = svg.datum(root).selectAll("path")
          .data(partition.nodes)
        .enter().append("path")
          .attr("display", function(d) { return d.depth ? null : "none"; }) // hide inner ring
          .attr("d", arc)
          .style("stroke", "#fff")
          .style("fill", function(d) { return color((d.children ? d : d.parent).name); })
          .style("fill-rule", "evenodd")
          .each(stash);

      d3.selectAll("input").on("change", function change() {
        var value = this.value === "count"
            ? function() { return 1; }
            : function(d) { return d.size; };

        path
            .data(partition.value(value).nodes)
          .transition()
            .duration(1500)
            .attrTween("d", arcTween);
      });
    });

    // Stash the old values for transition.
    function stash(d) {
      d.x0 = d.x;
      d.dx0 = d.dx;
    }

    // Interpolate the arcs in data space.
    function arcTween(a) {
      var i = d3.interpolate({x: a.x0, dx: a.dx0}, a);
      return function(t) {
        var b = i(t);
        a.x0 = b.x;
        a.dx0 = b.dx;
        return arc(b);
      };
    }

    d3.select(self.frameElement).style("height", height + "px");
});