text: /**
   * @author: @AngularClass
   * and some modifications from IBM
   */
  
  const helpers = require('./helpers');
  const webpackMerge = require('webpack-merge'); // used to merge webpack configs
  const commonConfig = require('./webpack.common.js'); // the settings that are common to prod and dev
  /**
   * Webpack Plugins
   */
  const DefinePlugin = require('webpack/lib/DefinePlugin');
  const NamedModulesPlugin = require('webpack/lib/NamedModulesPlugin');
  
  /**
   * Webpack Constants
   */
  const ENV = process.env.ENV = process.env.NODE_ENV = 'development';
  const HOST = process.env.HOST || '0.0.0.0';
  const PORT = process.env.PORT || 3000;
  const HMR = helpers.hasProcessFlag('hot');
  const BOT_ENDPOINT = process.env.BOT_ENDPOINT || 'http://localhost:3002';
  const METADATA = webpackMerge(commonConfig({env: ENV}).metadata, {
    host: HOST,
    port: PORT,
    ENV: ENV,
    HMR: HMR
  });
  
  /**
   * Webpack configuration
   *
   * See: http://webpack.github.io/docs/configuration.html#cli
   */
  module.exports = function(options) {
    return webpackMerge(commonConfig({env: ENV}), {
  
      /**
       * Merged metadata from webpack.common.js for index.html
       *
       * See: (custom attribute)
       */
      metadata: METADATA,
  
      /**
       * Switch loaders to debug mode.
       *
       * See: http://webpack.github.io/docs/configuration.html#debug
       */
      debug: true,
  
      /**
       * Developer tool to enhance debugging
       *
       * See: http://webpack.github.io/docs/configuration.html#devtool
       * See: https://github.com/webpack/docs/wiki/build-performance#sourcemaps
       */
      devtool: 'cheap-module-source-map',
  
      /**
       * Options affecting the output of the compilation.
       *
       * See: http://webpack.github.io/docs/configuration.html#output
       */
      output: {
  
        /**
         * The output directory as absolute path (required).
         *
         * See: http://webpack.github.io/docs/configuration.html#output-path
         */
        path: helpers.root('dist'),
  
        /**
         * Specifies the name of each output file on disk.
         * IMPORTANT: You must not specify an absolute path here!
         *
         * See: http://webpack.github.io/docs/configuration.html#output-filename
         */
        filename: '[name].bundle.js',
  
        /**
         * The filename of the SourceMaps for the JavaScript files.
         * They are inside the output.path directory.
         *
         * See: http://webpack.github.io/docs/configuration.html#output-sourcemapfilename
         */
        sourceMapFilename: '[name].map',
  
        /** The filename of non-entry chunks as relative path
         * inside the output.path directory.
         *
         * See: http://webpack.github.io/docs/configuration.html#output-chunkfilename
         */
        chunkFilename: '[id].chunk.js',
  
        library: 'ac_[name]',
        libraryTarget: 'var',
      },
  
      plugins: [
  
        /**
         * Plugin: DefinePlugin
         * Description: Define free variables.
         * Useful for having development builds with debug logging or adding global constants.
         *
         * Environment helpers
         *
         * See: https://webpack.github.io/docs/list-of-plugins.html#defineplugin
         */
        // NOTE: when adding more properties, make sure you include them in custom-typings.d.ts
        new DefinePlugin({
          'ENDPOINT_AUTH_TOKEN': JSON.stringify(METADATA.endpointAuthToken),
          'END_USER_APP': JSON.stringify({ url: "https://localhost:4200/"}),
          'BLUEMIX_AUTH': JSON.stringify({
            clientId: "watson-personal-assistant",
            clientSecret: "HFKjlJFDGFCflkjlj",
            serviceUrl: "https://login.ng.bluemix.net/UAALoginServerWAR", // Bluemix public ng
            //serviceUrl: "https://login.stage1.ng.bluemix.net/UAALoginServerWAR", // Bluemix stage1 ng
            callback: "http://localhost:3000"
          }),
          "ACCESS_TOKEN_PROVIDERS": JSON.stringify({
              "gmail":{
                  "verify_url":"https://www.googleapis.com/oauth2/v3/tokeninfo",
                  "refresh_url":"https://www.googleapis.com/oauth2/v4/token"
              }
          }),
          'ENV': JSON.stringify(METADATA.ENV),
          'HMR': METADATA.HMR,
          'process.env': {
            'ENDPOINT_AUTH_TOKEN': JSON.stringify(METADATA.endpointAuthToken),
            'ENV': JSON.stringify(METADATA.ENV),
            'NODE_ENV': JSON.stringify(METADATA.ENV),
            'HMR': METADATA.HMR
          }
        }),
  
        /**
           * Plugin: NamedModulesPlugin (experimental)
           * Description: Uses file names as module name.
           *
           * See: https://github.com/webpack/webpack/commit/a04ffb928365b19feb75087c63f13cadfc08e1eb
           */
          new NamedModulesPlugin(),
  
      ],
  
      /**
       * Static analysis linter for TypeScript advanced options configuration
       * Description: An extensible linter for the TypeScript language.
       *
       * See: https://github.com/wbuchwalter/tslint-loader
       */
      tslint: {
        emitErrors: false,
        failOnHint: false,
        resourcePath: 'src'
      },
  
      /**
       * Webpack Development Server configuration
       * Description: The webpack-dev-server is a little node.js Express server.
       * The server emits information about the compilation state to the client,
       * which reacts to those events.
       *
       * See: https://webpack.github.io/docs/webpack-dev-server.html
       */
      devServer: {
        port: METADATA.port,
        host: METADATA.host,
        historyApiFallback: true,
        watchOptions: {
          aggregateTimeout: 300,
          poll: 1000
        },
        outputPath: helpers.root('dist'),
        proxy: {       
          '/api/v1/namespaces/': {
            target: 'https://openwhisk.ng.bluemix.net', // Bluemix public ng
            //target: 'https://openwhisk.stage1.ng.bluemix.net', // Bluemix stage1 ng
            changeOrigin: true,
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          },
          '/bluemix/': {
            target: 'https://openwhisk.ng.bluemix.net', // Bluemix public ng
            //target: 'https://openwhisk.stage1.ng.bluemix.net', // Bluemix stage1 ng
            changeOrigin: true,
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          },
          '/conversation/api/': {
            target: 'https://gateway.watsonplatform.net', // Bluemix public ng
            //target: 'https://gateway-s.watsonplatform.net', // Bluemix stage1 ng
            changeOrigin: true, 
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          },        
          '/UAALoginServerWAR': {
            target: 'https://login.ng.bluemix.net', // Bluemix public ng
            //target: 'https://login.stage1.ng.bluemix.net', // Bluemix stage1 ng
            changeOrigin: true,
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          },
          '/v2': {
            target: 'https://api.ng.bluemix.net', // Bluemix public ng
            //target: 'https://api.stage1.ng.bluemix.net', // Bluemix stage1 ng
            changeOrigin: true, 
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          },      
          '/endpoint': {
            // target: 'http://endpoint.mybluemix.net',
            target: BOT_ENDPOINT,
            changeOrigin: true, 
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          },
          '/account': {
            // target: 'http://endpoint.mybluemix.net',
            target: 'http://localhost:3002',
            changeOrigin: true,
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          },
          '/wpa': {
            target: 'https://localhost:3001',
            changeOrigin: true,   // for vhosted sites
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          },
          '/listings': {
            target: 'https://watson-api-explorer.mybluemix.net',
            changeOrigin: true,   // for vhosted sites
            protocolRewrite: 'https',
            logLevel: 'debug',
            secure: false
          }
        }
      },
  
      /*
       * Include polyfills or mocks for various node stuff
       * Description: Node configuration
       *
       * See: https://webpack.github.io/docs/configuration.html#node
       */
      node: {
        global: 'window',
        crypto: 'empty',
        process: true,
        module: false,
        clearImmediate: false,
        setImmediate: false
      }
  
    });
  }
  