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

module.exports = {
  entry: ['./src/components/index.js', './src/styles/main.scss'],
  output: {
    path: path.join(__dirname, './dist'),
    filename: 'bundle.js',
    libraryTarget: 'commonjs2',
    publicPath: '/dist/',
    umdNamedDefine: true,
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        include: path.resolve(__dirname, 'src'),
        exclude: /node_modules/,
        use: ['babel-loader'],
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: 'style-loader', // creates style nodes from JS strings
          },
          {
            loader: 'css-loader', // translates CSS into CommonJS
          },
        ],
      },
      {
        test: /\.scss$/,
        use: [
          {
            loader: 'style-loader', // creates style nodes from JS strings
          },
          {
            loader: 'css-loader', // translates CSS into CommonJS
          },
          {
            loader: 'sass-loader', // compiles Sass to CSS
          },
        ],
      },
      {
        test: /\.svg$/,
        loader: 'svg-url-loader',
      },
      {
        test: /main\.scss$/,
        use: ExtractTextPlugin.extract({
           fallback: 'style-loader',
           use: [
             { loader: 'css-loader', options: { minimize: true } },
             { loader: 'sass-loader' }
           ]
        })
                // loader: ExtractTextPlugin.extract(['css-loader', 'sass-loader']),
      }
    ],
  },
  plugins: [
    new ExtractTextPlugin({
      filename: 'styles.min.css',
      allChunks: true,
    }),
  ],
  resolve: {
    extensions: ['*', '.js', '.jsx'],
    modules: [path.resolve(__dirname, 'src'), 'node_modules'],
  },
  externals: {
    // Don't bundle react or react-dom
    react: {
      commonjs: 'react',
      commonjs2: 'react',
      amd: 'React',
      root: 'React',
    },
    'react-dom': {
      commonjs: 'react-dom',
      commonjs2: 'react-dom',
      amd: 'ReactDOM',
      root: 'ReactDOM',
    },
  },
  devServer: {
    contentBase: './dist',
  },
};