{% extends 'index.html' %}

{% block body %}

    <script type='text/javascript'
      src='//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js'></script>
    <script type='text/javascript' src='http://d3js.org/d3.v3.min.js'></script>
    <script type='text/javascript'>
      // TODO(katepek): Move into a separate JS file

      var debug = true;
      function log(o) {
        if (debug) {
          console.log(o);
        }
      }

      // TODO(katepek): Find better values; currently for 13" screen.
      var width = 1350;
      var height = 650;
      var padding = 20;

      // TODO(katepek): Pull in some standard library for this
      var pair_colours =
        ['black', 'red', 'blue', 'green', 'magenta',
         'gray', 'hotpink', 'chocolate', 'deepskyblue', 'gold'];

      var dataset; // all packets
      var streams; // pairs of (transmitter, receiver)

      var pcapSecsScale; // x
      var seqScale;      // y

      try {
        $.getJSON('/json/' + get_key(), function(json) {
            begin = new Date().getTime();

            init_data(JSON.stringify(json));
            init_scales();
            visualize();

            end = new Date().getTime();
            log('Spent on visualization ' + ((end - begin) / 1000) + ' sec.');
        });
      } catch (error) {
        console.log(error);
      }

      function get_key() {
        parts = window.location.pathname.split('/');
        return parts[parts.length - 1];
      }

      function init_data(json_string) {
        // TODO(katepek): Should sanitize here? E.g., discard bad packets?
        // Packets w/o seq?
        js_objects = JSON.parse(json_string);
        dataset = JSON.parse(js_objects['js_packets']);
        streams = JSON.parse(js_objects['js_streams']);
      }

      function raw_seq(d) {
        return Number(d['seq']);
      }

      function raw_pcapSecs(d) {
        return parseFloat(d['pcap_secs']);
      }

      function init_scales() {
        // Prepare scale for X axis
        pcapSecsScale = d3.scale
          .linear()
          .domain([d3.min(dataset, raw_pcapSecs),
            d3.max(dataset, raw_pcapSecs)])
          .range([2 * padding, width - 2 * padding]);

        // Prepare scale for X axis
        seqScale = d3.scale
          .linear()
          .domain([d3.min(dataset, raw_seq),
            d3.max(dataset, raw_seq)])
          .range([height - padding, padding]);
      }

      function seq(d) {
        var seq = seqScale(Number(d['seq']));
        return seq;
      }

      function pcapSecs(d) {
        var pcapSecs = pcapSecsScale(parseFloat(d['pcap_secs']));
        return pcapSecs;
      }

      function visualize() {
        var svg = d3
          .select('body')
          .append('svg')
          .attr('width', width)
          .attr('height', height)
          .style('border', '1px solid black');

        // TODO(katepek): Show a summary somewhere as a legend
        // which pair corresponds to which colour
        for (i = 0; i < streams.length; i++) {
          log('pcap_vs_seq' + i);
          log(get_colour(i));
          svg
            .selectAll('pcap_vs_seq' + i)
            .data(dataset)
            .enter()
            .append('circle')
            .filter(function(d) {
              return d['ta'] == streams[i]['ta'] &&
                     d['ra'] == streams[i]['ra'];
            })
            .attr('cx', pcapSecs)
            .attr('cy', seq)
            .attr('r', 1)
            .attr('fill', get_colour(i))
            .append('title')
            .text(
               function(d) {
                 return d['typestr'] +
                   ': pcapSecs=' + d['pcap_secs'] +
                   '; seq=' + d['seq'] +
                   '\n(ta=' + d['ta'] + ',' + 'ra=' + d['ra'] + ')';
               }
            );
        }

        // TODO(katepek): Axes seem to show range, not the domain
        var pcapSecsAxis = d3.svg.axis()
          .scale(pcapSecsScale)
          .orient('bottom')
          .ticks(5);
        var seqAxis = d3.svg.axis()
          .scale(seqScale)
          .orient('right')
          .ticks(5);

        svg.append('g')
          .attr('class', 'axis')
          .attr('transform', 'translate(0,' + (height - padding) + ')')
          .call(pcapSecsAxis);
        svg.append('g')
          .attr('class', 'axis')
          .attr('transform', 'translate(' + (width - 2 * padding) + ',0)')
          .call(seqAxis);
      }

      function get_colour(i) {
        if (i < pair_colours.length)
          return pair_colours[i];
        return pair_colours[i % pair_colours.length];
      }

    </script>

{% end %}