define(['css/css-builder', './lessc-server', 'require'], function(css, lessc, req) {
  var less = {};
  
  var baseParts = req.toUrl('base_url').split('/');
  baseParts.pop();
  var baseUrl = baseParts.join('/');

  // include the base url as a path
  var parser = new lessc.Parser({
    paths: [baseUrl + '/']
  });

  var parseLess = function(less) {
    var CSS;
    parser.parse(less, function(err, tree) {
      if (err)
        throw err;
      CSS = tree.toCSS();
    });
    return CSS;
  }

  less.normalize = function(name, normalize) {
    if (name.substr(name.length - 5, 5) == '.less')
      name = name.substr(0, name.length - 5);
    return normalize(name);
  }
  
  less.load = function(name, req, load, config) {
    css.load(name, req, load, config, parseLess);
  }
  
  less.write = function(pluginName, moduleName, write) {
    css.write(pluginName, moduleName, write, parseLess);
  }
  
  less.onLayerEnd = function(write, data) {
    css.onLayerEnd(write, data, true);
  }
  
  return less;
});