const ESLintPlugin = require('eslint-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = (env, argv) => {
    const node_env = process.env.NODE_ENV ? process.env.NODE_ENV : 'development';
    const dev = node_env !== 'production';
    const config = {
        mode: node_env,
        devtool: dev ? 'source-map' : false,
        entry: {
            'index': [
                __dirname + '/src/index.js'
            ]
        },
        output: {
            path: __dirname + '/../public',
            filename: '[name].js'
        },
        module: {
            rules: [{
                test: /\.js$/,
                exclude: [
                    /\bnode_modules\b/,
                    /\bcore-js\b/,
                    /\bwebpack\/buildin\b/
                ],
                loader: 'babel-loader'
            }, {
              test: /\.(css)$/,
              use: [
                {
                  loader: dev ? 'style-loader' : MiniCssExtractPlugin.loader,
                },
                {
                  loader: 'css-loader',
                  options: {
                    sourceMap: true,
                  },
                }
              ],
            }, {
                test: /\.(png|jpe?g|gif|svg)$/i,
                use: [
                    {
                        loader: 'file-loader',
                    },
                ],
            }]
        },
        plugins: [
            new HtmlWebpackPlugin({
                template: __dirname + '/src/index.html'
              }),
        ],
        resolve: {
            symlinks: false,
            extensions: ['.js']
        }
    };
    if (dev) {
        config.plugins.push(
            new ESLintPlugin({
                files: __dirname + '/src',
                lintDirtyModulesOnly: true,
                failOnWarning: false,
                failOnError: true,
                fix: false
            }));
    }
    config.optimization = {
        minimize: !dev,
        minimizer: [
            new TerserPlugin({
                minify: TerserPlugin.swcMinify,
                // `terserOptions` options will be passed to `swc` (`@swc/core`)
                // Link to options - https://swc.rs/docs/config-js-minify
                terserOptions: {},
            }),
        ]
    };
    return config;
};