const path = require('path');

const ExtractCssChunks = require('extract-css-chunks-webpack-plugin');
const globImporter = require('node-sass-glob-importer');
const webpack = require('webpack');

const isProduction = !!process.argv.find((arg) => '--production' === arg);

const config = {
  mode: isProduction ? 'production' : 'development',
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: [
          /(node_modules\/(?!@avocado|contempo))/,
        ],
        use: {
          loader: 'babel-loader',
          options: {},
        },
      },
      // Styles.
      {
        test: /\.(?:sa|sc|c)ss$/,
        exclude: /\.raw\./,
        use: [
          {
            loader: ExtractCssChunks.loader,
            options: {
              hot: true,
            },
          },
          {
            loader: 'css-loader',
            options: {
              // 2 because postcss & sass.
              importLoaders: 2,
            },
          },
          {
            loader: 'postcss-loader',
          },
          {
            loader: 'sass-loader',
            options: {
              importer: globImporter(),
            },
          },
        ],
      },
      {
        test: /\.(?:sa|sc|c)ss$/,
        include: /\.raw\./,
        use: [
          {
            loader: 'raw-loader',
          },
          {
            loader: 'postcss-loader',
          },
          {
            loader: 'sass-loader',
            options: {
              importer: globImporter(),
            },
          },
        ],
      },
    ],
  },
  output: {
    // Worker happiness.
    globalObject: `(typeof self === 'undefined' ? this : self)`,
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].js',
  },
  plugins: [
    new ExtractCssChunks({
      filename: '[name].css',
    }),
  ],
  resolve: {
    alias: {},
    modules: [
      path.join(__dirname, 'node_modules'),
      path.join(__dirname, 'scss'),
    ],
  },
  resolveLoader: {
    modules: [
      path.join(__dirname, 'node_modules'),
    ],
  },
};

module.exports = config;