// eslint-disable-next-line no-undef
const path = require('path');
// eslint-disable-next-line no-undef
const HtmlWebpackPlugin = require('html-webpack-plugin');
// eslint-disable-next-line no-undef
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
// eslint-disable-next-line no-undef
const {CleanWebpackPlugin} = require('clean-webpack-plugin');

// eslint-disable-next-line no-undef
module.exports = (env, argv) => ({
    entry: './src/app.js',
    output: {
        filename: '[hash].js',
        // eslint-disable-next-line no-undef
        path: path.resolve(__dirname, 'dist'),
    },
    devServer: {
        compress: true,
        port: 9000,
        historyApiFallback: true,
    },
    optimization: {
        splitChunks: {
            chunks: 'all',
            cacheGroups: {
                defaultVendors: {
                    test: /[\\/]node_modules[\\/]/,
                    enforce: true,
                },
            }
        },
    },
    plugins: [
        new CleanWebpackPlugin(),
        new HtmlWebpackPlugin({
            filename: 'index.html',
            template: './src/app.html'
        }),
        new MiniCssExtractPlugin({
            filename: '[hash].css',
        }),
    ],
    module: {
        rules: [
            {
                test: /\.html$/i,
                loader: 'html-loader',
            },
            {
                test: /\.css$/i,
                use: [
                    MiniCssExtractPlugin.loader,
                    'css-loader',
                    'postcss-loader'
                ],
            },
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: [
                    'babel-loader',
                    {
                        loader: 'eslint-loader',
                        options: (argv.mode === 'production') ? {
                            failOnError: true,
                            failOnWarning: true,
                        } : {},
                    }
                ]
            },
            {
                test: /\.(gif|png|jpe?g|svg)$/i,
                loader: 'file-loader',
            },
            {
                test: /\.(woff|woff2|eot|ttf|otf)$/,
                loader: 'file-loader',
            },
        ],
    },
});