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
const ngtools = require('@ngtools/webpack');
const webpack = require('webpack');

/**
 * Webpack Plugins
 */
const DedupePlugin = require('webpack/lib/optimize/DedupePlugin');
const DefinePlugin = require('webpack/lib/DefinePlugin');
const IgnorePlugin = require('webpack/lib/IgnorePlugin');
const NormalModuleReplacementPlugin = require('webpack/lib/NormalModuleReplacementPlugin');
const ProvidePlugin = require('webpack/lib/ProvidePlugin');
const UglifyJsPlugin = require('webpack/lib/optimize/UglifyJsPlugin');
const WebpackMd5Hash = require('webpack-md5-hash');
const AssetsPlugin = require('assets-webpack-plugin');
const ContextReplacementPlugin = require('webpack/lib/ContextReplacementPlugin');
const CommonsChunkPlugin = require('webpack/lib/optimize/CommonsChunkPlugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ForkCheckerPlugin = require('awesome-typescript-loader').ForkCheckerPlugin;
const HtmlElementsPlugin = require('./html-elements-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const LoaderOptionsPlugin = require('webpack/lib/LoaderOptionsPlugin');
const ScriptExtHtmlWebpackPlugin = require('script-ext-html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

/**
 * Webpack Constants
 */
const ENV = process.env.NODE_ENV = process.env.ENV = 'production';
const HOST = process.env.HOST || 'localhost';
const PORT = process.env.PORT || 8080;
const METADATA = webpackMerge(commonConfig({
  env: ENV
}).metadata, {
  host: HOST,
  port: PORT,
  ENV: ENV,
  HMR: false
});

module.exports = function (env) {
  isProd = true;
  return {

    /**
     * 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: 'source-map',

    /*
     * The entry point for the bundle
     * Our Angular.js app
     *
     * See: http://webpack.github.io/docs/configuration.html#entry
     */
    entry: {

      'polyfills': './src/polyfills.browser.ts',
      'vendor': './src/vendor.browser.ts',
      'main': './src/main.browser.aot.ts'

    },

    /*
     * 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', '.scss'],

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

    },

    /**
     * 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].[chunkhash].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].[chunkhash].bundle.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].[chunkhash].chunk.js'

    },

    /*
     * 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$/,
          loaders: [
            // '@angularclass/hmr-loader?pretty=' + !isProd + '&prod=' + isProd,
            // 'awesome-typescript-loader',
            // 'angular2-template-loader',
            // 'angular2-router-loader'
            '@ngtools/webpack'

          ],
          exclude: [/\.(spec|e2e)\.ts$/]
        },

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

        /*
         * to string and css loader support for *.css files
         * Returns file content as string
         *
         */
        {
          test: /\.css$/,
          loaders: ['to-string-loader', 'css-loader']
        },

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

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

        {
          test: /\.scss$/,
          use: ['raw-loader', 'sass-loader']
        },

        {
          test: /\.woff(2)?(\?v=.+)?$/,
          use: 'url-loader?limit=10000&mimetype=application/font-woff'
        },

        {
          test: /\.(ttf|eot|svg)(\?v=.+)?$/,
          use: 'file-loader'
        },

        {
          test: /initial\.scss$/,
          loader: ExtractTextPlugin.extract({
            fallbackLoader: 'style-loader',
            loader: 'css-loader!sass-loader?sourceMap'
          })
        },

      ],



    },

    resolveLoader: {
      moduleExtensions: ['-loader']
    },


    /**
     * Add additional plugins to the compiler.
     *
     * See: http://webpack.github.io/docs/configuration.html#plugins
     */
    plugins: [
      new ExtractTextPlugin({filename: 'initial.css', allChunks: true}),

      /**
       * Plugin: WebpackMd5Hash
       * Description: Plugin to replace a standard webpack chunkhash with md5.
       *
       * See: https://www.npmjs.com/package/webpack-md5-hash
       */
      new WebpackMd5Hash(),

      new ngtools.AotPlugin({
        tsConfigPath: './tsconfig.aot.json',
        baseDir: process.cwd(),
        entryModule: helpers.root('src/app/app.module') + '#AppModule'
      }),

      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 ForkCheckerPlugin(),

      /*
       * 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', 'vendor'].reverse()
      }),



      /**
       * 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(\\|\/)(esm(\\|\/)src|src)(\\|\/)linker/,
        helpers.root('src') // location of your src
      ),

      /**
       * Plugin: DedupePlugin
       * Description: Prevents the inclusion of duplicate code into your bundle
       * and instead applies a copy of the function at runtime.
       *
       * See: https://webpack.github.io/docs/list-of-plugins.html#defineplugin
       * See: https://github.com/webpack/docs/wiki/optimization#deduplication
       */
      // new DedupePlugin(), // see: https://github.com/angular/angular-cli/issues/1587

      /**
       * Plugin: DefinePlugin
       * Description: Define free variables.
       * Useful for having development builds with debug logging or adding global constants.
       *
       * фironment 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({
        'ENV': JSON.stringify(METADATA.ENV),
        'HMR': METADATA.HMR,
        'process.env': {
          'ENV': JSON.stringify(METADATA.ENV),
          'NODE_ENV': JSON.stringify(METADATA.ENV),
          'HMR': METADATA.HMR,
        }
      }),

      /**
       * Plugin: UglifyJsPlugin
       * Description: Minimize all JavaScript output of chunks.
       * Loaders are switched into minimizing mode.
       *
       * See: https://webpack.github.io/docs/list-of-plugins.html#uglifyjsplugin
       */
      // NOTE: To debug prod builds uncomment //debug lines and comment //prod lines
      // new UglifyJsPlugin({
      //   // beautify: true, //debug
      //   // mangle: false, //debug
      //   // dead_code: false, //debug
      //   // unused: false, //debug
      //   // deadCode: false, //debug
      //   // compress: {
      //   //   screw_ie8: true,
      //   //   keep_fnames: true,
      //   //   drop_debugger: false,
      //   //   dead_code: false,
      //   //   unused: false
      //   // }, // debug
      //   // comments: true, //debug
      //
      //
      //   beautify: false, //prod
      //   mangle: {
      //     screw_ie8: true,
      //     keep_fnames: true
      //   }, //prod
      //   compress: {
      //     screw_ie8: true
      //   }, //prod
      //   comments: false //prod
      // }),

      /**
       * Plugin: NormalModuleReplacementPlugin
       * Description: Replace resources that matches resourceRegExp with newResource
       *
       * See: http://webpack.github.io/docs/list-of-plugins.html#normalmodulereplacementplugin
       */

      new NormalModuleReplacementPlugin(
        /angular2-hmr/,
        helpers.root('config/modules/angular2-hmr-prod.js')
      ),

      /**
       * Plugin: IgnorePlugin
       * Description: Don’t generate modules for requests matching the provided RegExp.
       *
       * See: http://webpack.github.io/docs/list-of-plugins.html#ignoreplugin
       */

      // new IgnorePlugin(/angular2-hmr/),

      /**
       * Plugin: CompressionPlugin
       * Description: Prepares compressed versions of assets to serve
       * them with Content-Encoding
       *
       * See: https://github.com/webpack/compression-webpack-plugin
       */
      //  install compression-webpack-plugin
      // new CompressionPlugin({
      //   regExp: /\.css$|\.html$|\.js$|\.map$/,
      //   threshold: 2 * 1024
      // })

      /*
       * 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' },
        { from: 'node_modules/ckeditor', to: 'ckeditor' },
        { from: 'src/meta'}
      ]),


      /*
       * 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,
        chunksSortMode: 'dependency',
        metadata: METADATA,
        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: HtmlHeadConfigPlugin
       * 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')
      }),

      new webpack.ProvidePlugin({
        $: "jquery",
        jQuery: "jquery",
        "window.jQuery": "jquery",
        Tether: "tether",
        "window.Tether": "tether",
        Tooltip: "exports-loader?Tooltip!bootstrap/js/dist/tooltip",
        Alert: "exports-loader?Alert!bootstrap/js/dist/alert",
        Button: "exports-loader?Button!bootstrap/js/dist/button",
        Carousel: "exports-loader?Carousel!bootstrap/js/dist/carousel",
        Collapse: "exports-loader?Collapse!bootstrap/js/dist/collapse",
        Dropdown: "exports-loader?Dropdown!bootstrap/js/dist/dropdown",
        Modal: "exports-loader?Modal!bootstrap/js/dist/modal",
        Popover: "exports-loader?Popover!bootstrap/js/dist/popover",
        Scrollspy: "exports-loader?Scrollspy!bootstrap/js/dist/scrollspy",
        Tab: "exports-loader?Tab!bootstrap/js/dist/tab",
        Util: "exports-loader?Util!bootstrap/js/dist/util"
      }),

      /**
       * Plugin LoaderOptionsPlugin (experimental)
       *
       * See: https://gist.github.com/sokra/27b24881210b56bbaff7
       */
      new LoaderOptionsPlugin({
        debug: false,
        options: {
          context: helpers.root('src'),
          output: {
            path: helpers.root('dist')
          },

          /**
           * 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: true,
            failOnHint: true,
            resourcePath: 'src'
          },


          /**
           * Html loader advanced options
           *
           * See: https://github.com/webpack/html-loader#advanced-options
           */
          // TODO: Need to workaround Angular 2's html syntax => #id [bind] (event) *ngFor
          htmlLoader: {
            minimize: true,
            removeAttributeQuotes: false,
            caseSensitive: true,
            customAttrSurround: [
              [/#/, /(?:)/],
              [/\*/, /(?:)/],
              [/\[?\(?/, /(?:)/]
            ],
            customAttrAssign: [/\)?\]?=/]
          },

        }
      }),

    ],

    /*
     * 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: false,
      module: false,
      clearImmediate: false,
      setImmediate: false
    }

  }
}