const path = require('path');
const fs = require('fs');
const webpack = require('webpack');
const { styles, builds } = require('@ckeditor/ckeditor5-dev-utils');
const TerserPlugin = require('terser-webpack-plugin');

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',
        devtool: false,
        optimization: {
            minimize: false,
            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: /\.svg$/, use: 'raw-loader' },
                {
                    test: /ckeditor5-[^/\\]+[/\\]theme[/\\].+\.css$/,
                    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
                                })
                            }
                        }
                    ]
                }
            ],
        },
    };

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