/*
  ONLY RUN BUILDS WITH `npm run webpack`!
  DO NOT USE NORMAL WEBPACK! IT WILL NOT WORK!
*/

const path = require('path');
const webpack = require('webpack');
const createVariants = require('parallel-webpack').createVariants;
const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
const version = require('./package.json').version;

const createConfig = options => {
  const plugins = [
    new webpack.optimize.ModuleConcatenationPlugin(),
  ];

  if (options.minify) {
    plugins.push(new UglifyJSPlugin({
      uglifyOptions: {
        mangle: { keep_classnames: true },
        output: { comments: false },
      },
    }));
  }

  // eslint-disable-next-line max-len
  const filename = `discord${process.env.VERSIONED === 'false' ? '' : `.${version}`}${options.minify ? '.min' : ''}.js`;

  return {
    entry: './src/index.js',
    output: {
      path: path.resolve('./webpack'),
      filename,
      library: 'Discord',
      libraryTarget: 'window',
    },
    module: {
      rules: [
        { test: /\.md$/, loader: 'ignore-loader' },
        {
          test: require.resolve('./package.json'),
          use: {
            loader: 'json-filter-loader',
            options: {
              used: ['version', 'homepage'],
            },
          },
        },
        ...require('snekfetch/webpack.supplemental').rules,
      ],
    },
    node: {
      fs: 'empty',
      dns: 'mock',
      tls: 'mock',
      child_process: 'empty',
      dgram: 'empty',
      zlib: 'empty',
      __dirname: true,
      process: false,
      path: 'empty',
      Buffer: false,
    },
    plugins,
  };
};

module.exports = createVariants({}, { minify: [false, true] }, createConfig);