const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

module.exports = (env, argv) => {
  const isProd = argv.mode === 'production';

  return {
    entry: './fabula-ultima-sheet.js',
    output: {
      filename: isProd ? 'bundle.[contenthash].js' : 'bundle.js',
      path: path.resolve(__dirname, 'dist'),
      clean: true,
      // Disable IIFE wrapping so onclick= handlers can reach global functions
      iife: false,
    },
    module: {
      rules: [
        {
          test: /\.css$/,
          use: [
            isProd ? MiniCssExtractPlugin.loader : 'style-loader',
            'css-loader',
          ],
        },
      ],
    },
    plugins: [
      ...(isProd
        ? [new MiniCssExtractPlugin({ filename: 'styles.[contenthash].css' })]
        : []),
      new HtmlWebpackPlugin({
        template: './fabula-ultima-sheet.html',
        filename: 'index.html',
        scriptLoading: 'blocking',
      }),
    ],
    optimization: {
      minimizer: ['...', new CssMinimizerPlugin()],
    },
    devServer: {
      static: { directory: path.resolve(__dirname, 'dist') },
      port: 8080,
      open: true,
    },
  };
};