/*
* Webpack
*/
const webpack = require('webpack');

/**
 * Some helper functions
 */
const helpers = require('./helpers');

/*
 * Webpack Plugins
 */
const AssetsPlugin = require('assets-webpack-plugin');
const CommonsChunkPlugin = require('webpack/lib/optimize/CommonsChunkPlugin');
const OccurenceOrderPlugin = require('webpack/lib/optimize/OccurrenceOrderPlugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ContextReplacementPlugin = require('webpack/lib/ContextReplacementPlugin');
const NormalModuleReplacementPlugin = require('webpack/lib/NormalModuleReplacementPlugin');
const nodeExternals = require('webpack-node-externals');
const CheckerPlugin = require('awesome-typescript-loader').CheckerPlugin;
const ScriptExtHtmlWebpackPlugin = require('script-ext-html-webpack-plugin');

/*
 * Webpack Constants
 */
const AOT = helpers.hasNpmFlag('aot');
const METADATA = {
  title: 'Bebop Bridge Client',
  baseUrl: '/',
  isDevServer: helpers.isWebpackDevServer()
};

/*
 * Webpack configuration
 *
 * See: http://webpack.github.io/docs/configuration.html#cli
 */
module.exports = function (options) {

  isProd = options.env === 'production';

  return {

    /*
     * The entry point for the bundle.
     * See: http://webpack.github.io/docs/configuration.html#entry
     */
    entry: {
      'polyfills': './src/app/polyfills.ts',
      //'vendor': './src/app/vendor.ts', // added via CommonsChunkPlugin
      'app': './src/app/main.ts'
    },

    /*
    * Ignore node built-in modules like path, fs, etc. 
    */
    //target: 'web', // 'node'

    /*
    * Exclude node_modules in webpack bundling. It is not possible to bundle all modules,
    * especially modules with binary dependencies. One which doesn't work is for example
    * socket.io-client. 
    */
    //externals: [nodeExternals()],

    /*
     * Options affecting the resolving of modules.
     * See: http://webpack.github.io/docs/configuration.html#resolve
     */
    resolve: {

      /*
       * An array of extensions that should be used to resolve modules.
       * See: http://webpack.github.io/docs/configuration.html#resolve-extensions
       */
      extensions: ['.ts', '.js', '.json'],

      // An array of directory names to be resolved to the current directory, everything else excluded (other defaults).
      modules: [helpers.root('src'), helpers.root('node_modules')],

    },

    /*
     * Options affecting the normal modules.
     *
     * See: http://webpack.github.io/docs/configuration.html#module
     */
    module: {

      rules: [

        /*
         * Typescript loader support for .ts and Angular 2 async routes via .async.ts
         * Replace templateUrl and stylesUrl with require()
         * See: https://github.com/s-panferov/awesome-typescript-loader
         * See: https://github.com/TheLarkInn/angular2-template-loader
         */
        {
          test: /\.ts$/,
          use: [
            'awesome-typescript-loader?{configFileName: "tsconfig.webpack.json"}',
            'angular2-template-loader'
            //'angular-router-loader?loader=system&genDir=compiled/src/app&aot=' + AOT
          ],
          exclude: [/\.(spec|e2e)\.ts$/]
        },

        /*
         * Json loader support for *.json files.
         * See: https://github.com/webpack/json-loader
         */
        {
          test: /\.json$/,
          use: 'json-loader'
        },

        /*
         * to string and css loader support for *.css files
         * Executes first css-loader, then to-string-loader and returns file content as string.
         */
        {
          test: /\.css$/,
          use: ['to-string-loader', 'css-loader']
        },

        /*
        * to string and css and sass converter for *.scss files.
        * Executes first sass-loader, then css-loader, then to-string-loader and returns file content as string.
        */
        {
          test: /\.scss$/,
          use: ['to-string-loader', 'css-loader', 'sass-loader']
        },
        {
          test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
          loader: "url-loader?limit=10000&mimetype=application/font-woff"
        },
        {
          test: /\.(ttf|eot|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
          loader: "file-loader"
        },

        // {
        //   test: /\.woff(\?v=\d+\.\d+\.\d+)?$/,
        //   loader: "url-loader?limit=10000&mimetype=application/font-woff"
        // }, 
        // {
        //   test: /\.woff2(\?v=\d+\.\d+\.\d+)?$/,
        //   loader: "url-loader?limit=10000&mimetype=application/font-woff"
        // }, 
        // {
        //   test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/,
        //   loader: "url-loader?limit=10000&mimetype=application/octet-stream"
        // }, 
        // {
        //   test: /\.eot(\?v=\d+\.\d+\.\d+)?$/,
        //   loader: "file-loader"
        // }, 
        // {
        //   test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        //   loader: "url-loader?limit=10000&mimetype=image/svg+xml"
        // },

        /* Raw loader support for *.html
         * Returns file content as string
         *
         * See: https://github.com/webpack/raw-loader
         */
        {
          test: /\.html$/,
          use: 'raw-loader',
          exclude: [helpers.root('src/index.html')]
        },

        /* File loader for supporting images, for example, in CSS files.
         */
        {
          test: /\.(jpg|png|gif)$/,
          use: 'file-loader'
        },

      ],

    },

    /*
     * Add additional plugins to the compiler.
     *
     * See: http://webpack.github.io/docs/configuration.html#plugins
     */
    plugins: [

      // new AssetsPlugin({
      //   path: helpers.root('dist'),
      //   filename: 'webpack-assets.json',
      //   prettyPrint: true
      // }),

      /*
       * Plugin: ForkCheckerPlugin
       * Description: Do type checking in a separate process, so webpack don't need to wait.
       * See: https://github.com/s-panferov/awesome-typescript-loader#forkchecker-boolean-defaultfalse
       */
      new CheckerPlugin(),

      /*
      * Plugin: OccurenceOrderPlugin
      * Description: Varies the distribution of the ids to get the smallest id length
      * for often used ids.
      *
      * See: https://webpack.github.io/docs/list-of-plugins.html#occurrenceorderplugin
      * See: https://github.com/webpack/docs/wiki/optimization#minimize
      */
      new OccurenceOrderPlugin(true),

      /*
     * Plugin: CommonsChunkPlugin
     * Description: Shares common code between the pages.
     * It identifies common modules and put them into a commons chunk.
     *
     * See: https://webpack.github.io/docs/list-of-plugins.html#commonschunkplugin
     * See: https://github.com/webpack/docs/wiki/optimization#multi-page-app
     */
      new CommonsChunkPlugin({
        name: 'polyfills',
        chunks: ['polyfills']
      }),
      // This enables tree shaking of the vendor modules
      new CommonsChunkPlugin({
        name: 'vendor',
        chunks: ['app'],
        minChunks: module => /node_modules\//.test(module.resource)
      }),
      // Specify the correct order the scripts will be injected in
      new CommonsChunkPlugin({
        name: helpers.reverse(['polyfills', 'vendor'])
      }),

      /**
       * Plugin: ContextReplacementPlugin
       * Description: Provides context to Angular's use of System.import
       *
       * See: https://webpack.github.io/docs/list-of-plugins.html#contextreplacementplugin
       * See: https://github.com/angular/angular/issues/11580
       */
      new ContextReplacementPlugin(
        // The (\\|\/) piece accounts for path separators in *nix and Windows
        /angular(\\|\/)core(\\|\/)src(\\|\/)linker/,
        helpers.root('src'), // location of your src
        {
          // your Angular Async Route paths relative to this root directory
        }
      ),

      /*
       * Plugin: CopyWebpackPlugin
       * Description: Copy files and directories in webpack.
       * Copies project static assets.
       * See: https://www.npmjs.com/package/copy-webpack-plugin
       */
      new CopyWebpackPlugin([
        {
          from: 'src/assets',
          to: 'assets'
        },
        // PrimeNG
        {
          from: 'node_modules/primeng/resources/primeng.min.css',
          to: 'assets/primeng/resources/primeng.min.css'
        },
        {
          from: 'node_modules/primeng/resources/themes/omega/theme.css',
          to: 'assets/primeng/resources/themes/omega/theme.css'
        },
        {
          from: 'node_modules/primeng/resources/themes/omega/images/',
          to: 'assets/primeng/resources/themes/omega/images'
        },
        {
          from: 'node_modules/primeng/resources/themes/omega/fonts/',
          to: 'assets/primeng/resources/themes/omega/fonts'
        },
        // Leaflet
        {
          from: 'node_modules/leaflet/dist/leaflet.css',
          to: 'assets/leaflet/leaflet.css'
        },
        // Scripts
        {
          from: 'src/scripts/start.bat',
          to: 'start.bat'
        }
      ]),

      /*
       * Plugin: HtmlWebpackPlugin
       * Description: Simplifies creation of HTML files to serve your webpack bundles.
       * This is especially useful for webpack bundles that include a hash in the filename
       * which changes every compilation.
       * See: https://github.com/ampedandwired/html-webpack-plugin
       */
      new HtmlWebpackPlugin({
        template: 'src/index.html',
        title: METADATA.title,
        metadata: METADATA,
        chunksSortMode: 'dependency',
        inject: 'head'
      }),

      /*
       * Plugin: ScriptExtHtmlWebpackPlugin
       * Description: Enhances html-webpack-plugin functionality
       * with different deployment options for your scripts including:
       *
       * See: https://github.com/numical/script-ext-html-webpack-plugin
       */
      new ScriptExtHtmlWebpackPlugin({
        defaultAttribute: 'defer'
      }),

      // /*
      //  * Plugin: HtmlElementsPlugin
      //  * Description: Generate html tags based on javascript maps.
      //  *
      //  * If a publicPath is set in the webpack output configuration, it will be automatically added to
      //  * href attributes, you can disable that by adding a "=href": false property.
      //  * You can also enable it to other attribute by settings "=attName": true.
      //  *
      //  * The configuration supplied is map between a location (key) and an element definition object (value)
      //  * The location (key) is then exported to the template under then htmlElements property in webpack configuration.
      //  *
      //  * Example:
      //  *  Adding this plugin configuration
      //  *  new HtmlElementsPlugin({
      //  *    headTags: { ... }
      //  *  })
      //  *
      //  *  Means we can use it in the template like this:
      //  *  <%= webpackConfig.htmlElements.headTags %>
      //  *
      //  * Dependencies: HtmlWebpackPlugin
      //  */
      // new HtmlElementsPlugin({
      //   headTags: require('./head-config.common')
      // }),


      // Fix Angular 2
      new NormalModuleReplacementPlugin(
        /facade(\\|\/)async/,
        helpers.root('node_modules/@angular/core/src/facade/async.js')
      ),
      new NormalModuleReplacementPlugin(
        /facade(\\|\/)collection/,
        helpers.root('node_modules/@angular/core/src/facade/collection.js')
      ),
      new NormalModuleReplacementPlugin(
        /facade(\\|\/)errors/,
        helpers.root('node_modules/@angular/core/src/facade/errors.js')
      ),
      new NormalModuleReplacementPlugin(
        /facade(\\|\/)lang/,
        helpers.root('node_modules/@angular/core/src/facade/lang.js')
      ),
      new NormalModuleReplacementPlugin(
        /facade(\\|\/)math/,
        helpers.root('node_modules/@angular/core/src/facade/math.js')
      )

    ],

    /*
    * Include polyfills or mocks for various node stuff
    * Description: Node configuration
    *
    * See: https://webpack.github.io/docs/configuration.html#node
    */
    node: {
      global: true,
      crypto: 'empty',
      process: true,
      module: false,
      clearImmediate: false,
      setImmediate: false
    }

  };
}
