const path = require('path');
const fs = require('fs');
const webpack = require('webpack');
const TerserPlugin = require('terser-webpack-plugin');
const styles = require("@ckeditor/ckeditor5-dev-utils/lib/styles");

function getDirectories(srcpath) {
  return fs
    .readdirSync(srcpath)
    .filter((item) => fs.statSync(path.join(srcpath, item)).isDirectory());
}

module.exports = [];
// Loop through every subdirectory in src, each a different plugin, and build
// each one in ./build.
getDirectories('./js/ckeditor5_plugins').forEach((dir) => {
  const bc = {
    mode: 'production',
    optimization: {
      minimize: true,
      minimizer: [
        new TerserPlugin({
          terserOptions: {
            format: {
              comments: false,
            },
          },
          test: /\.js(\?.*)?$/i,
          extractComments: false,
        }),
      ],
      moduleIds: 'named',
    },
    entry: {
      path: path.resolve(
        __dirname,
        'js/ckeditor5_plugins',
        dir,
        'src/index.js',
      ),
    },
    output: {
      path: path.resolve(__dirname, './js/build'),
      filename: `${dir}.js`,
      library: ['CKEditor5', dir],
      libraryTarget: 'umd',
      libraryExport: 'default',
    },
    plugins: [
      // It is possible to require the ckeditor5-dll.manifest.json used in
      // core/node_modules rather than having to install CKEditor 5 here.
      // However, that requires knowing the location of that file relative to
      // where your module code is located.
      new webpack.DllReferencePlugin({
        manifest: require('./node_modules/ckeditor5/build/ckeditor5-dll.manifest.json'), // eslint-disable-line global-require, import/no-unresolved
        scope: 'ckeditor5/src',
        name: 'CKEditor5.dll',
      }),
    ],
    module: {
      rules: [
        {
          test: /\.css$/,
          use: [
            {
              loader: 'style-loader',
              options: {
                injectType: 'singletonStyleTag',
                attributes: {
                  'data-cke': true
                }
              }
            },
            'css-loader',
            {
              loader: 'postcss-loader',
              options: {
                postcssOptions: styles.getPostCssConfig( {
                  themeImporter: {
                    themePath: require.resolve( '@ckeditor/ckeditor5-theme-lark' )
                  },
                  minify: true
                } )
              }
            }
          ]
        },
        { test: /\.svg$/, use: 'raw-loader' }
      ],
    },
  };

  module.exports.push(bc);
});
