var margin = { top: 50, right: 300, bottom: 50, left: 50 },
    outerWidth = 1050,
    outerHeight = 500,
    width = outerWidth - margin.left - margin.right,
    height = outerHeight - margin.top - margin.bottom;

var x = d3.scale.linear()
    .range([0, width]).nice();

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

var xCat = "x",
    yCat = "y",
    //rCat = "length",
    colorCat = "label",
    questionCat = "question";

d3.csv("data_tfidf.csv", function(data) {
  
  data.forEach(function(d) {
    d.x = +d.x;
    d.y = +d.y;    
  });
   
  var xMax = d3.max(data, function(d) { return d[xCat]; }) * 1.05,
      xMin = d3.min(data, function(d) { return d[xCat]; }),
      xMin = xMin > 0 ? 0 : xMin,
      yMax = d3.max(data, function(d) { return d[yCat]; }) * 1.05,
      yMin = d3.min(data, function(d) { return d[yCat]; }),
      yMin = yMin > 0 ? 0 : yMin;

  x.domain([xMin, xMax]);
  y.domain([yMin, yMax]);

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

  var yAxis = d3.svg.axis()
      .scale(y)
      .orient("left")
      .tickSize(-width);

  var color = d3.scale.category20();

  var tip = d3.tip()
      .attr("class", "d3-tip")
      .offset([-10, 0])
      .html(function(d) {
        return d[questionCat];
      });

  var zoomBeh = d3.behavior.zoom()
      .x(x)
      .y(y)
      .scaleExtent([0, 500])
      .on("zoom", zoom);

  var svg = d3.select("#scatter")
    .append("svg")
      .attr("width", outerWidth)
      .attr("height", outerHeight)
    .append("g")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")")
      .call(zoomBeh);

  svg.call(tip);

  svg.append("rect")
      .attr("width", width)
      .attr("height", height);

  svg.append("g")
      .classed("x axis", true)
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis)
    .append("text")
      .classed("label", true)
      .attr("x", width)
      .attr("y", margin.bottom - 10)
      .style("text-anchor", "end")
      .text(xCat);

  svg.append("g")
      .classed("y axis", true)
      .call(yAxis)
    .append("text")
      .classed("label", true)
      .attr("transform", "rotate(-90)")
      .attr("y", -margin.left)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text(yCat);

  var objects = svg.append("svg")
      .classed("objects", true)
      .attr("width", width)
      .attr("height", height);

  objects.append("svg:line")
      .classed("axisLine hAxisLine", true)
      .attr("x1", 0)
      .attr("y1", 0)
      .attr("x2", width)
      .attr("y2", 0)
      .attr("transform", "translate(0," + height + ")");

  objects.append("svg:line")
      .classed("axisLine vAxisLine", true)
      .attr("x1", 0)
      .attr("y1", 0)
      .attr("x2", 0)
      .attr("y2", height);
  
  /*var symbol = d3.symbol();
  
  
  var dots = svg.selectAll(".dots")
    .data(data)
    .enter()
    .append("path");
  
  
  
  dots.attr("d", symbol.type(function(d){
    if(d[shapeCat] == "1"){ return d3.symbolCircle
    } else if (d[shapeCat] == "0"){ return d3.symbolSquare}}))
    .attr("fill", function(d) { return color(1); })
    .on("mouseover", tip.show)
    .on("mouseout", tip.hide);

  
  .attr('fill', "teal")
	.attr('stroke','#000')
	.attr('stroke-width',1)
	.attr('transform',function(d){ return "translate("+xScale(d.price)+","+yScale(d.rating)+")"; });


  */
  objects.selectAll(".dot")
      .data(data)
      .enter().append("circle")
      .attr("r", 3.5)
      .attr("transform", transform)
      .classed("dot", true)
      .style("fill", function(d) { return color(d[colorCat]); })
      .on("mouseover", tip.show)
      .on("mouseout", tip.hide);
  
  /*var legend = svg.selectAll(".legend")
      .data(color.domain())
      .enter().append("g")
      .classed("legend", true)
      .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });

  legend.append("circle")
      .attr("r", 3.5)
      .attr("cx", width + 20)
      .attr("fill", color);

  legend.append("text")
      .attr("x", width + 26)
      .attr("dy", ".35em")
      .text(function(d) { return d; });
*/
  d3.select("input").on("click", change);

  function change() {
    xCat = "x";
    xMax = d3.max(data, function(d) { return d[xCat]; });
    xMin = d3.min(data, function(d) { return d[xCat]; });

    zoomBeh.x(x.domain([xMin, xMax])).y(y.domain([yMin, yMax]));

    var svg = d3.select("#scatter").transition();

    svg.select(".x.axis").duration(750).call(xAxis).select(".label").text(xCat);

    objects.selectAll(".dot").transition().duration(1000).attr("transform", transform);
  }

  function zoom() {
    svg.select(".x.axis").call(xAxis);
    svg.select(".y.axis").call(yAxis);

    svg.selectAll(".dot")
        .attr("transform", transform);
  }

  function transform(d) {
    return "translate(" + x(d[xCat]) + "," + y(d[yCat]) + ")";
  }
});