/*
 * Production assets generation
 */

const webpack = require('webpack');
const commonVariables = require('./webpack.configuration');
const conf = commonVariables.configuration;
const merge = require('webpack-merge');
const common = require('./webpack.config.common.js');

const filesystem = require('fs');
const path = require('path');
const autoprefixer = require('autoprefixer');

const ExtractTextPlugin = require('extract-text-webpack-plugin');
const FaviconsWebpackPlugin = require('favicons-webpack-plugin');

const TerserPlugin = require('terser-webpack-plugin');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');

let plugins = [
  new webpack.DefinePlugin({
    'process.env': {
      'NODE_ENV': JSON.stringify('production')
    }
  }),
  new webpack.LoaderOptionsPlugin({
    minimize: true,
    debug: false
  }),
  new ExtractTextPlugin({
    filename: 'css/[name].css',
    allChunks: true
  }),

  new FaviconsWebpackPlugin({
    title: 'Webpack App',
    logo: path.join(__dirname, conf.APPDIR, conf.SRC, 'favicon.png'),
    prefix: '/icons/',
    emitStats: false,
    persistentCache: true,
    inject: false,
    statsFilename: path.join(conf.APPDIR, conf.DIST, 'icons', 'iconstats.json'),
    icons: {
      android: true,
      appleIcon: true,
      appleStartup: true,
      coast: true,
      favicons: true,
      firefox: true,
      opengraph: true,
      twitter: true,
      yandex: true,
      windows: true
    }
  }),
  new OptimizeCssAssetsPlugin({
    //assetNameRegExp: /\.optimize\.css$/g,
    cssProcessor: require('cssnano'),
    cssProcessorPluginOptions: {
      preset: ['default', {
        discardComments: {
          removeAll: true
        }
      }],
    },
    canPrint: true
  }),
];

// add themes favicons
commonVariables.themes.forEach((theme) => {
  const faviconPath = path.join(__dirname, theme, conf.SRC, 'favicon.png');
  if (filesystem.existsSync(faviconPath)) {
    plugins.push(new FaviconsWebpackPlugin({
      title: 'Webpack App',
      logo: faviconPath,
      prefix: '/' + theme + '-icons/',
      emitStats: false,
      persistentCache: true,
      inject: false,
      statsFilename: path.join(conf.APPDIR, conf.DIST, theme + '-icons', 'iconstats.json'),
      icons: {
        android: true,
        appleIcon: true,
        appleStartup: true,
        coast: true,
        favicons: true,
        firefox: true,
        opengraph: true,
        twitter: true,
        yandex: true,
        windows: true
      }
    }));
  }
});

module.exports = merge(common, {
  mode: 'production',
  optimization: {
    namedModules: true, // NamedModulesPlugin()
    splitChunks: { // CommonsChunkPlugin()
      name: 'vendor',
      minChunks: 2
    },
    noEmitOnErrors: true, // NoEmitOnErrorsPlugin
    concatenateModules: true, //ModuleConcatenationPlugin
    minimizer: [
      new TerserPlugin({
        parallel: true,
        sourceMap: false,
        terserOptions: {
          parse: {
            ecma: 8,
          },
          output: {
            ecma: 5,
          },
        },
      }),
    ]
  },

  devtool: '',

  output: {
    path: path.join(__dirname, conf.APPDIR, conf.DIST),
    filename: path.join('js', '[name].js'),
    publicPath: path.join(conf.APPDIR, conf.DIST),
  },

  module: {
    rules: [{
      test: /\.s?css$/,
      use: ExtractTextPlugin.extract({
        fallback: "style-loader",
        use: [{
          loader: 'css-loader',
          options: {
            sourceMap: false
          }
        }, {
          loader: 'postcss-loader',
          options: {
            sourceMap: false,
            plugins: [
              autoprefixer()
            ]
          }
        }, {
          loader: 'resolve-url-loader'
        }, {
          loader: 'sass-loader',
          options: {
            sourceMap: false
          }
        }, ]
      })
    }, {
      test: /fontawesome([^.]+).(ttf|otf|eot|svg|woff(2)?)(\?[a-z0-9]+)?$/,
      use: [{
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: 'fonts/',
          publicPath: '../fonts/'
        }
      }]
    }, {
      test: /\.(ttf|otf|eot|svg|woff(2)?)$/,
      use: [{
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: 'fonts/',
          publicPath: '../fonts/'
        }
      }]
    }, {
      test: /\.(png|jpg|jpeg|gif|svg)$/,
      loader: 'file-loader',
      options: {
        name: '[name].[ext]',
        outputPath: 'img/',
        publicPath: '../img/'
          /*,
                          name(file) {
                              //return 'public/[path][name].[ext]';
                              return '[hash].[ext]';
                          },*/
      },
    }, ]
  },

  plugins: plugins,
});