// set the dimensions and margins of the graph
var margin = {top: 100, right: -10, bottom: 0, left: -10},
    width = 538 - margin.left - margin.right,
    height = 350 - margin.top - margin.bottom;

// parse the date / time
var parseTime = d3.timeParse("%Y");

// set the ranges
var x = d3.scaleTime().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);

// define the line
var valueline = d3.line()
    .x(function(d) { return x(d.Time); })
    .y(function(d) { return y(d.Diff); });
// define the line
var valueline2 = d3.line()
    .x(function(d) { return x(d.Time); })
    .y(function(d) { return y(d.Hashrate); });
  
// append the svg obgect to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("#graphContainer").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
		.attr("class", "graph")
  .append("g")
    .attr("transform",
          "translate(" + margin.left + "," + margin.top + ")");

function draw(data, blocks) {
  
  var data = data[blocks];

	let graphHeight = 0;


  // format the data
  data.forEach(function(d) {
      // d.Time = parseTime(d.Time);
			console.log(d.Time);
      d.Diff = +d.Diff;
      d.Hashrate = +d.Hashrate;
			graphHeight = d.Diff;
  });
  
  // sort years ascending
  data.sort(function(a, b){
    return a["Block"]-b["Block"];
	})
 
  // Scale the range of the data
  x.domain(d3.extent(data, function(d) { return d.Time; }));
  y.domain([0, d3.max(data, function(d) {
	  return Math.max(d.Diff, d.Hashrate); })]);
  
  // Add the valueline path.
  svg.append("path")
      .data([data])
      .attr("class", "line1")
      .attr("d", valueline);
  // Add the valueline path.
  svg.append("path")
      .data([data])
      .attr("class", "line2")
      .attr("d", valueline2);  
  // Add the X Axis
  svg.append("g")
      .attr("transform", "translate(0," + (height - 20) + ")")
      .call(d3.axisBottom(x));

  // // Add the Y Axis
  // svg.append("g")
  //     .call(d3.axisLeft(y));
  }
// Get the data
d3.json("./api/hashrate100.json", function(error, data) {
  if (error) throw error;

	data.blocks.splice(0, data.blocks.length - 5 );
	// console.log(data);

  // trigger render
  draw(data, "blocks");
});