// This is an example Chiasm plugin based on HTML5 Canvas.
// This displays a wave simulation.
// Clicking on the canvas interacts with the simulation.
// Note that D3.js is not used at all here.
function Wave (){
  var my = new ChiasmComponent();
  my.el = document.createElement("div");
  // Construct the SVG DOM.
  var svg = d3.select(my.el).append("svg");
  var g = marginConvention(my, svg);
  
  var margin = {top: 20, right: 20, bottom: 30, left: 40},
      width = 960 - margin.left - margin.right,
      height = 500 - margin.top - margin.bottom;

  var x = d3.scale.ordinal()
      .rangeRoundBands([0, width], .1);

  var y = d3.scale.linear()
      .range([height, 0]);

  var xAxis = d3.svg.axis()
      .scale(x)
      .orient("bottom");

  var yAxis = d3.svg.axis()
      .scale(y)
      .orient("left")
      .ticks(10, "%");

  svg
      .attr("width", width + margin.left + margin.right)
      .attr("height", height + margin.top + margin.bottom)
    .select("g")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

  d3.tsv("data.tsv", type, function(error, data) {
    if (error) throw error;

    my.when(["box", "data"], function (box, data){
      x.domain(data.map(function(d) { return d.letter; }));
      y.domain([0, d3.max(data, function(d) { return d.frequency; })]);

      svg.append("g")
          .attr("class", "x axis")
          .attr("transform", "translate(0," + box.height + ")")
          .call(xAxis);

      svg.append("g")
          .attr("class", "y axis")
          .call(yAxis)
        .append("text")
          .attr("transform", "rotate(-90)")
          .attr("y", 6)
          .attr("dy", ".71em")
          .style("text-anchor", "end")
          .text("Frequency");

      svg.selectAll(".bar")
          .data(data)
        .enter().append("rect")
          .attr("class", "bar")
          .attr("x", function(d) { return x(d.letter); })
          .attr("width", x.rangeBand())
          .attr("y", function(d) { return y(d.frequency); })
          .attr("height", function(d) { return box.height - y(d.frequency); });
    }
  });

  function type(d) {
    d.frequency = +d.frequency;
    return d;
  }

  function marginConvention(my, svg){
    var g = svg.append("g");

    my.addPublicProperty("margin", {top: 20, right: 20, bottom: 30, left: 20});

    my.when(["box", "margin"], function (box, margin){
      my.width = box.width - margin.left - margin.right;
      my.height = box.height - margin.top - margin.bottom;
      g.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
    });

    return g;
  }
  
  function xScaleLinear(my){
    var scale = d3.scale.linear();
    my.addPublicProperty("xScaleDomain", [0, 1000]);
    my.when(["xScaleDomain", "width"], function (xScaleDomain, width){

      my.xScale = scale
        .domain(xScaleDomain)
        .range([0, width]);

    });
  }

  function xAxis(my, g){
    var axisG = g.append("g").attr("class", "x axis");
    var axis = d3.svg.axis();

    my.when("xScale", function (xScale){
      axis.scale(xScale);
      axisG.call(axis);
    });

    my.when("height", function (height){
      axisG.attr("transform", "translate(0," + height + ")");
    });
  }
  

  return my;
}