const path = require('path');
const merge = require('webpack-merge');
const common = require('./webpack.common.js');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const ZipPlugin = require('zip-webpack-plugin');
const _merge = require('lodash/merge');

module.exports = merge({
    customizeObject(a, b, key) {
        if (key === 'module') {
            return _merge({}, a, b);
        }

        return undefined;
    }
})(common, {
    mode: 'production',
    module: {
        rules: [
            {
                test: /\.css$/,
                use: [
                    {
                        loader: MiniCssExtractPlugin.loader
                    },
                    'css-loader'
                ]
            }
        ]
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename: 'css/[name].css'
        }),
        new ZipPlugin({
            path: path.resolve(__dirname, 'dest'),
            filename: 'acss_devtools-prod.zip'
        })
    ],
    optimization: {
        minimizer: [
            new UglifyJsPlugin({
                cache: true,
                parallel: true,
                sourceMap: true
            }),
            new OptimizeCSSAssetsPlugin({})
        ]
    }
});