const path = require('path');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

const env = process.env.NODE_ENV;

const prodPlugins = env === 'production' ? [
  new UglifyJsPlugin({
    sourceMap: true,
  }),
] : [];

module.exports = {
  entry: './src/transport.ts',
  output: {
    filename: env === 'production' ? '[name].min.js' : '[name].js',
    path: path.resolve(__dirname, 'dist'),
  },
  mode: env === 'production' ? 'production' : 'development',
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              '@babel/preset-env',
            ],
            plugins: [
              '@babel/proposal-class-properties',
              '@babel/proposal-object-rest-spread',
            ],
            cacheDirectory: env === 'development',
          },
        },
      },
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.css$/,
        use: env === 'production'
          ? ExtractTextPlugin.extract({
            fallback: 'style-loader',
            use: ['css-loader'],
          })
          : ['style-loader', 'css-loader'],
      },
      {
        test: /\.png$/,
        use: 'file-loader',
      },
    ],
  },
  resolve: {
    extensions: ['.tsx', '.ts', '.js'],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'index.html'),
    }),
    new ExtractTextPlugin({
      disable: env === 'development',
      filename: '[name].css',
    }),
    ...prodPlugins,
  ],
  optimization: {
    splitChunks: {
      cacheGroups: {
        commons: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendors',
          chunks: 'all',
        },
      },
    },
  },
  devtool: env === 'production' ? 'source-map' : 'cheap-module-eval-source-map',
  devServer: {
    contentBase: path.join(__dirname, 'dist'),
    host: '0.0.0.0',
    port: 8888,
    disableHostCheck: true,
  },
};