// Generated by CoffeeScript 1.10.0
(function() {
  var CONTINENTS, color, contents, graticule, height, lod, pack, path, projection, simulation, svg, width, zoom, zoomable_layer;

  svg = d3.select('body').append('svg');

  width = d3.select('svg').node().getBoundingClientRect().width;

  height = d3.select('svg').node().getBoundingClientRect().height;

  CONTINENTS = [
    {
      id: 'North America',
      centroid: [-100.258219, 42.393044]
    }, {
      id: 'Africa',
      centroid: [14.313831, 4.467357]
    }, {
      id: 'South America',
      centroid: [-68.083970, -13.071758]
    }, {
      id: 'Asia',
      centroid: [116.019485, 30.377321]
    }, {
      id: 'Europe',
      centroid: [13.559762, 50.671550]
    }, {
      id: 'Oceania',
      centroid: [151.026997, -32.147138]
    }, {
      id: 'Seven seas (open ocean)',
      centroid: [64.587828, -26.307320]
    }
  ];

  zoomable_layer = svg.append('g');

  zoom = d3.zoom().scaleExtent([-Infinity, Infinity]).on('zoom', function() {
    zoomable_layer.attrs({
      transform: d3.event.transform
    });
    zoomable_layer.selectAll('.label > text').attrs({
      transform: "scale(" + (1 / d3.event.transform.k) + ")"
    });
    return lod(d3.event.transform.k);
  });

  svg.call(zoom);

  projection = d3.geoWinkel3().rotate([0, 0]).center([20, 16]).scale(1.2 * width / (2 * Math.PI)).translate([width / 2, height / 2]);

  path = d3.geoPath(projection);

  CONTINENTS.forEach(function(d) {
    return d.centroid = projection(d.centroid);
  });

  graticule = d3.geoGraticule();

  pack = d3.pack().size([1.2 * width, 1.2 * height]).padding(3);

  CONTINENTS.forEach(function(d) {
    return d.force = {};
  });

  simulation = d3.forceSimulation().force('collision', d3.forceCollide(function(d) {
    return d.r;
  }).strength(0.01)).force('attract', d3.forceAttract().target(function(d) {
    return [d.foc_x, d.foc_y];
  }).strength(0.5));

  color = d3.scaleOrdinal(d3.schemeCategory10).domain(CONTINENTS.map(function(d) {
    return d.id;
  }));

  contents = zoomable_layer.append('g');

  d3.json('ne_50m_admin_0_countries.topo.json', function(geo_data) {
    var countries_data, land;
    countries_data = topojson.feature(geo_data, geo_data.objects.countries).features;
    land = topojson.merge(geo_data, geo_data.objects.countries.geometries.filter(function(d) {
      return d.properties.continent !== 'Antarctica';
    }));
    CONTINENTS.forEach(function(d) {
      d.force.x = d.centroid[0];
      d.force.y = d.centroid[1];
      d.force.foc_x = d.centroid[0];
      return d.force.foc_y = d.centroid[1];
    });
    contents.append('path').attrs({
      "class": 'land',
      d: path(land)
    });
    return d3.csv('population.csv', function(data) {
      var bubbles, en_bubbles, en_labels, i, index, j, labels, population_data, ref, root;
      index = {};
      data.forEach(function(d) {
        return index[d['Country Code']] = d;
      });
      population_data = [];
      countries_data.forEach(function(d) {
        if (d.properties.iso_a3 in index) {
          return population_data.push({
            id: d.properties.iso_a3,
            parent: d.properties.continent,
            country: d,
            value: +index[d.properties.iso_a3]['2016']
          });
        }
      });
      population_data.push({
        id: "root",
        parent: ""
      });
      CONTINENTS.forEach(function(d) {
        return population_data.push({
          id: d.id,
          parent: "root",
          d: d
        });
      });
      root = (d3.stratify().id(function(d) {
        return d.id;
      }).parentId(function(d) {
        return d.parent;
      }))(population_data);
      root.sum(function(d) {
        return d.value;
      }).sort(function(a, b) {
        return b.value - a.value;
      });
      pack(root);
      root.eachBefore(function(d) {
        if (d.parent != null) {
          d.relx = d.x - d.parent.x;
          return d.rely = d.y - d.parent.y;
        } else {
          d.relx = d.x;
          return d.rely = d.y;
        }
      });
      root.eachBefore(function(d) {
        if ((d.parent != null) && d.parent.id === 'root') {
          return d.data.d.force.r = d.r;
        }
      });
      bubbles = zoomable_layer.selectAll('.bubble').data(root.leaves());
      en_bubbles = bubbles.enter().append('circle').attrs({
        "class": 'bubble',
        r: function(d) {
          return d.r;
        },
        fill: function(d) {
          return color(d.parent.id);
        }
      });
      en_bubbles.append('title').text(function(d) {
        return d.data.country.properties.name_long + "\nPopulation: " + (d3.format(',')(d.value));
      });
      labels = zoomable_layer.selectAll('.label').data(root.leaves());
      en_labels = labels.enter().append('g').attrs({
        "class": 'label'
      });
      en_labels.append('text').text(function(d) {
        return d.data.country.properties.name_long;
      }).attrs({
        dy: '0.35em'
      });
      lod(1);
      simulation.nodes(CONTINENTS.map(function(d) {
        return d.force;
      })).stop();
      for (i = j = 0, ref = Math.ceil(Math.log(simulation.alphaMin()) / Math.log(1 - simulation.alphaDecay())); 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
        simulation.tick();
      }
      en_bubbles.attrs({
        transform: function(d) {
          return "translate(" + (d.relx + d.parent.data.d.force.x) + "," + (d.rely + d.parent.data.d.force.y) + ")";
        }
      });
      return en_labels.attrs({
        transform: function(d) {
          return "translate(" + (d.relx + d.parent.data.d.force.x) + "," + (d.rely + d.parent.data.d.force.y) + ")";
        }
      });
    });
  });

  lod = function(z) {
    zoomable_layer.selectAll('.label').classed('hidden', function(d) {
      return d.r < 23 / z;
    });
    return zoomable_layer.selectAll('.land').attrs({
      opacity: 1 / z
    });
  };

}).call(this);