// Generated by CoffeeScript 1.10.0
(function() {
  var enl, enn, graph, height, index, links, links_layer, nodes, nodes_layer, simulation, svg, width;

  svg = d3.select('svg');

  width = svg.node().getBoundingClientRect().width;

  height = svg.node().getBoundingClientRect().height;

  graph = {
    nodes: [
      {
        id: 'A'
      }, {
        id: 'B'
      }, {
        id: 'C'
      }, {
        id: 'D'
      }, {
        id: 'E'
      }
    ],
    links: [
      {
        source: 'A',
        target: 'B'
      }, {
        source: 'A',
        target: 'C'
      }, {
        source: 'A',
        target: 'D'
      }, {
        source: 'B',
        target: 'C'
      }, {
        source: 'C',
        target: 'E'
      }, {
        source: 'E',
        target: 'A'
      }
    ]
  };

  index = {};

  graph.nodes.forEach(function(d) {
    return index[d.id] = d;
  });

  graph.links.forEach(function(l) {
    l.source = index[l.source];
    return l.target = index[l.target];
  });

  simulation = d3.forceSimulation().force('link', d3.forceLink().id(function(d) {
    return d.id;
  }).strength(0.5)).force('charge', d3.forceManyBody()).force('center', d3.forceCenter(width / 2, height / 2));

  links_layer = svg.append('g');

  nodes_layer = svg.append('g');

  nodes = nodes_layer.selectAll('.node').data(graph.nodes);

  enn = nodes.enter().append('g').attrs({
    "class": 'node'
  });

  enn.append('circle').attrs({
    r: 3
  });

  enn.append('text').text(function(d) {
    return d.id;
  }).attrs({
    dy: '1.2em'
  });

  links = links_layer.selectAll('.link').data(graph.links);

  enl = links.enter().append('line').attrs({
    "class": 'link'
  });

  simulation.nodes(graph.nodes).on('tick', function() {
    enn.attrs({
      transform: function(d) {
        return "translate(" + d.x + ", " + d.y + ")";
      }
    });
    return enl.attrs({
      x1: function(d) {
        return d.source.x;
      },
      y1: function(d) {
        return d.source.y;
      },
      x2: function(d) {
        return d.target.x;
      },
      y2: function(d) {
        return d.target.y;
      }
    });
  });

  simulation.force('link').links(graph.links);

}).call(this);