(function() {
  var global, new_square;

  global = {
    SIDE: 80
  };

  window.main = function() {
    var colorify, d, data, height, path_generator, squares, svg, width;
    width = 960;
    height = 500;
    svg = d3.select('body').append('svg').attr('width', width).attr('height', height);
    /* create the GeoJSON
    */
    data = [
      {
        i: 1,
        j: 1,
        type: 'A'
      }, {
        i: 4,
        j: 2,
        type: 'B'
      }, {
        i: 3,
        j: 3,
        type: 'C'
      }, {
        i: 3,
        j: 4,
        type: 'C'
      }, {
        i: 3,
        j: 7,
        type: 'B'
      }, {
        i: 2,
        j: 7,
        type: 'D'
      }
    ];
    squares = {
      type: 'FeatureCollection',
      features: (function() {
        var _i, _len, _results;
        _results = [];
        for (_i = 0, _len = data.length; _i < _len; _i++) {
          d = data[_i];
          _results.push(new_square(d));
        }
        return _results;
      })()
    };
    /* define a color scale
    */
    colorify = d3.scale.category10().domain(['A', 'B', 'C', 'D']);
    /* identity projection. see http://bl.ocks.org/mbostock/5663666 for reference
    */
    path_generator = d3.geo.path().projection(d3.geo.transform({
      point: function(x, y) {
        return this.stream.point(x, y);
      }
    }));
    /* draw the result
    */
    return svg.selectAll('.square').data(squares.features).enter().append('path').attr('class', 'square').style('fill', function(d) {
      return colorify(d.properties.type);
    }).attr('d', path_generator);
  };

  /* create a new square
  */

  new_square = function(d) {
    return {
      type: 'Feature',
      geometry: {
        type: 'Polygon',
        coordinates: [[[d.j * global.SIDE, d.i * global.SIDE], [(d.j + 1) * global.SIDE, d.i * global.SIDE], [(d.j + 1) * global.SIDE, (d.i + 1) * global.SIDE], [d.j * global.SIDE, (d.i + 1) * global.SIDE], [d.j * global.SIDE, d.i * global.SIDE]]]
      },
      properties: {
        type: d.type
      }
    };
  };

}).call(this);