{% extends "base.html" %}

{% block styles %}
{{super()}}
<link rel="stylesheet" href="{{url_for('static', filename='view_annotation.css')}}">{% endblock %}

{% block app_content %}
<h1>View Annotations</h1>

<div id="graph"></div>

<script src="//d3js.org/d3.v5.min.js"></script>
<script>
var data = {{ data.chart_data | safe }};
var n = 0;
data.forEach(function(d) {
  d.X = n++;
  d.Y = d.value;
});


var divWidth = 1000;
var divHeight = 480;

var svg = d3.select("#graph")
	.on("touchstart", nozoom)
	.on("touchmove", nozoom)
	.append("svg")
	.attr("width", divWidth)
	.attr("height", divHeight);

var margin = {top: 20, right: 20, bottom: 50, left: 50};
var width = +svg.attr("width") - margin.left - margin.right;
var height = +svg.attr("height") - margin.top - margin.bottom;

var zoom = d3.zoom()
  .scaleExtent([1, 50])
  .translateExtent([[0, 0], [width, height]])
  .extent([[0, 0], [width, height]])
  .on("zoom", zoomed);

var x = d3.scaleLinear().range([0, width]);
var x2 = d3.scaleLinear().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);

var xAxis = d3.axisBottom(x);
var yAxis = d3.axisLeft(y);

var xExtent = d3.extent(data, function(d) { return d.X; });
var xRange = xExtent[1] - xExtent[0];
var xDomainMin = xExtent[0] - xRange * 0.02;
var xDomainMax = xExtent[1] + xRange * 0.02;

var yExtent = d3.extent(data, function(d) { return d.Y; });
var yRange = yExtent[1] - yExtent[0];
var yDomainMin = yExtent[0] - yRange * 0.05;
var yDomainMax = yExtent[1] + yRange * 0.05;

x.domain([xDomainMin, xDomainMax]);
y.domain([yDomainMin, yDomainMax]);
x2.domain(x.domain());

svg.append("defs").append("clipPath")
  .attr("id", "clip")
  .append("rect")
  .attr("width", width - 30)
  .attr("height", height)
  .attr("transform", "translate(" + 30 + ",0)");

svg.append("g")
  .attr("class", "axis axis--y")
  .attr("transform", "translate(" + 30 + ",0)")
  .call(yAxis);

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

svg.append("text")
  .attr("text-anchor", "middle")
  .attr("class", "axis-label")
  .attr("transform", "translate(" + (width - 20) + "," + (height + 50) + ")")
  .text("Time");

var line = d3.line()
  .x(function(d) { return x(d.X); })
  .y(function(d) { return y(d.Y); });

var g = svg.append("g")
    .call(zoom);

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

var view = g.append("g")
    .attr("class", "view");

view.append("path")
  .datum(data)
  .attr("class", "line")
  .attr("d", line);

var points = view.selectAll("circle")
    .data(data)
  .enter().append("circle")
    .attr("cx", function(d) { return x(d.X); })
    .attr("cy", function(d) { return y(d.Y); })
    .attr("data_X", function(d) { return d.X; })
    .attr("data_Y", function(d) { return d.Y; })
    .attr("r", 5)
    .on("click", clicked);

function zoomed() {
  t = d3.event.transform;
  x.domain(t.rescaleX(x2).domain());
  svg.select(".line").attr("d", line);
  points.data(data)
    .attr("cx", function(d) { return x(d.X); })
    .attr("cy", function(d) { return y(d.Y); });
  annolines = view.selectAll("line");
  annolines._groups[0].forEach(function(l) {
    l.setAttribute("x1", x(l.getAttribute("cp_idx")));
    l.setAttribute("x2", x(l.getAttribute("cp_idx")));
  });
  svg.select(".axis--x").call(xAxis);
}

function clicked(d, i) {
	if (d3.event.defaultPrevented) return; // zoomed
}

function nozoom() {
  d3.event.preventDefault();
}

var annotations = {{ data.annotations | safe }};

annotations.forEach(function(a) {
  for (i=0; i<points._groups[0].length; i++) {
    p = points._groups[0][i];
    if (p.getAttribute("data_X") == a.index) {
      var elem = d3.select(p);
      elem.classed(a.user, 'true');
      view.append("line")
        .attr("cp_idx", a.index)
        .attr("y1", y(yDomainMax))
        .attr("y2", y(yDomainMin))
        .attr("x1", x(a.index))
        .attr("x2", x(a.index))
        .attr("class", "ann-line" + " " + a.user);
    }
  }
});


</script>
{% endblock %}