const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
  plugins: [
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, 'src/index.html')
    }),
    new webpack.ProvidePlugin({
      Buffer: ['buffer', 'Buffer'],
      process: 'process/browser'
    })
  ],
  resolve: {
    alias: {
      // maps fs to a virtual one allowing to register file content dynamically
      fs: 'pdfkit/js/virtual-fs.js',
      // iconv-lite is used to load cid less fonts (uncommon)
      'iconv-lite': false
    },
    fallback: {
      // crypto module is not necessary at browser
      crypto: false,
      // fallbacks for native node libraries
      buffer: require.resolve('buffer/'),
      stream: require.resolve('readable-stream'),
      zlib: require.resolve('browserify-zlib')
    }
  },
  module: {
    rules: [
      // bundle and load afm files verbatim
      { test: /\.afm$/, type: 'asset/source' },
      // bundle and load binary files inside static-assets folder as base64
      {
        test: /src[/\\]static-assets/,
        type: 'asset/inline',
        generator: {
          dataUrl: content => {
            return content.toString('base64');
          }
        }
      },
      // load binary files inside lazy-assets folder as an URL
      {
        test: /src[/\\]lazy-assets/,
        type: 'asset/resource'
      },
      {
        enforce: 'post',
        test: /fontkit[/\\]index.js$/,
        loader: 'transform-loader',
        options: {
          brfs: {}
        }
      },
      {
        enforce: 'post',
        test: /unicode-properties[/\\]index.js$/,
        loader: 'transform-loader',
        options: {
          brfs: {}
        }
      },
      {
        enforce: 'post',
        test: /linebreak[/\\]src[/\\]linebreaker.js/,
        loader: 'transform-loader',
        options: {
          brfs: {}
        }
      }
    ]
  },
  optimization: {
    minimizer: [
      new TerserPlugin({
        exclude: /src[/\\]index\.js$/ // not working. Probably related to dynamic function creation
      })
    ]
  }
};