// Generated by CoffeeScript 1.10.0
(function() {
  var CONTINENTS, color, contents, graticule, height, lod, path, projection, radius, 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 = ['North America', 'Africa', 'South America', 'Asia', 'Europe', 'Oceania', 'Seven seas (open ocean)'];

  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([16, 13.8]).scale(1.3 * width / (2 * Math.PI)).translate([width / 2, height / 2]);

  path = d3.geoPath(projection);

  graticule = d3.geoGraticule();

  radius = d3.scaleSqrt().range([0, 65]);

  simulation = d3.forceSimulation().force('collision', d3.forceCollide(function(d) {
    return d.r + 0.35;
  })).force('attract', d3.forceAttract().target(function(d) {
    return [d.foc_x, d.foc_y];
  }));

  color = d3.scaleOrdinal(d3.schemeCategory10).domain(CONTINENTS);

  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';
    }));
    contents.append('path').attrs({
      "class": 'land',
      d: path(land)
    });
    countries_data.forEach(function(d) {
      var subpolys;
      if (d.geometry.type === 'Polygon') {
        return d.main = d;
      } else if (d.geometry.type === 'MultiPolygon') {
        subpolys = [];
        d.geometry.coordinates.forEach(function(p) {
          var sp;
          sp = {
            coordinates: p,
            properties: d.properties,
            type: 'Polygon'
          };
          sp.area = d3.geoArea(sp);
          return subpolys.push(sp);
        });
        return d.main = subpolys.reduce((function(a, b) {
          if (a.area > b.area) {
            return a;
          } else {
            return b;
          }
        }), subpolys[0]);
      }
    });
    return d3.csv('population.csv', function(data) {
      var bubbles, en_bubbles, en_labels, i, index, j, labels, population_data, ref;
      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']
          });
        }
      });
      radius.domain([
        0, d3.max(population_data, function(d) {
          return d.value;
        })
      ]);
      population_data.forEach(function(d) {
        return d.r = radius(d.value);
      });
      population_data.forEach(function(d) {
        d.centroid = projection(d3.geoCentroid(d.country.main));
        d.x = d.centroid[0];
        d.y = d.centroid[1];
        d.foc_x = d.centroid[0];
        return d.foc_y = d.centroid[1];
      });
      bubbles = zoomable_layer.selectAll('.bubble').data(population_data);
      en_bubbles = bubbles.enter().append('circle').attrs({
        "class": 'bubble',
        r: function(d) {
          return d.r;
        },
        fill: function(d) {
          return color(d.parent);
        }
      });
      en_bubbles.append('title').text(function(d) {
        return d.country.properties.name_long + "\nPopulation: " + (d3.format(',')(d.value));
      });
      labels = zoomable_layer.selectAll('.label').data(population_data);
      en_labels = labels.enter().append('g').attrs({
        "class": 'label'
      });
      en_labels.append('text').text(function(d) {
        return d.country.properties.name_long;
      }).attrs({
        dy: '0.35em'
      });
      lod(1);
      simulation.nodes(population_data).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.x + "," + d.y + ")";
        }
      });
      return en_labels.attrs({
        transform: function(d) {
          return "translate(" + d.x + "," + d.y + ")";
        }
      });
    });
  });

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

}).call(this);