var appPath = process.argv[2] || process.cwd();
var buildPath = process.argv[3] || process.cwd() + '/build.json';
var webpackPath = process.argv[4] || process.cwd() + '/node_modules/webpack';

var webpack = require(webpackPath);

try {
  var entries = require(buildPath);
} catch (e) {
  var entries = {main:{}};
}

var config = Object.keys(entries).map(function(entry) {
  delete require.cache[require.resolve(appPath)];
  var child = require(appPath).builder;
  child.name = entry;
  var main = child.entry.main;
  delete child.entry.main;
  child.entry[entry] = main;
  child.plugins.push(new webpack.DefinePlugin(encode(entries[entry])));
  return child;
});

function encode(obj) {
  for (k in obj) {
    obj[k] = JSON.stringify(obj[k]);
  }
  return obj;
}

function handleFatalError(err) {
  console.error(err.stack);
  process.exit(1);
}

function handleSoftErrors(errors) {
  errors.forEach(function(err) {
    console.error(err.stack || err);
  });
  process.exit(1);
}

webpack(config, function(err, stats) {
  if (err) return handleFatalError(err);
  var jsonStats = stats.toJson();
  if (jsonStats.errors.length > 0) return handleSoftErrors(jsonStats.errors);
  console.log(stats.toString({
    "cached": false,
    "cachedAssets": false,
    "modules": true,
    "chunks": false,
    "reasons": false,
    "errorDetails": false,
    "chunkOrigins": false,
    "exclude": [
      "node_modules",
      "bower_components",
      "jam",
      "components"
    ]
  }));
  process.exit(0);
});