const { mergeWithRules } = require('webpack-merge');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const commonConfig = require('./webpack.common');

module.exports = mergeWithRules({
  module: {
    rules: {
      test: 'match',
      use: 'replace',
    },
  },
})(commonConfig, {
  mode: 'production',

  // TODO: no source maps, add back
  devtool: false,

  module: {
    rules: [
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
    ],
  },
  optimization: {
    minimizer: ['...', new CssMinimizerPlugin()],
    splitChunks: {
      chunks: 'all',
    },
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: '[name].[contenthash].css',
    }),
  ],
  output: {
    pathinfo: false,
    filename: '[name].[contenthash].js',
  },
});