const webpack = require('webpack');
const path = require('path');
const HtmlWebPackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const ErrorOverlayPlugin = require('error-overlay-webpack-plugin');

const dev = process.env.NODE_ENV !== 'production';

module.exports = {
    devtool: dev ? 'source-map' : false,
    mode: dev ? 'development' : 'production',
    entry: {
        'Juick': [
            __dirname + '/src/index.js',
            __dirname + '/src/style/main.css'
        ]
    },
    output: {
        filename: dev ? '[name].js' : '[name].[contenthash].bundle.js',
        chunkFilename: dev ? '[name].js' : '[name].[contenthash].bundle.js',
        publicPath: '/',
        path: path.resolve(__dirname, 'dist')
    },
    module: {
        rules: [
            {
                test: /\.css$/,
                use: [
                    MiniCssExtractPlugin.loader,
                    {
                        loader: 'css-loader'
                    },
                    {
                        loader: 'postcss-loader', options: {
                            plugins: () => [
                                require('autoprefixer')({
                                    browsers: 'last 4 versions, > 1%, ie >= 8'
                                })
                            ]
                        }
                    }
                ]
            },
            {
                test: /\.html$/,
                use: [
                    {
                        loader: 'html-loader',
                        options: { minimize: false }
                    }
                ]
            },
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: 'babel-loader'
            },
            {
                test: /\.(jpe?g|png|gif|svg)$/i,
                loaders: [
                    'file-loader?hash=sha512&digest=hex&name=[hash].[ext]'
                ]
            }
        ]
    },
    optimization: {
        minimizer: [
            new UglifyJsPlugin({
                cache: true,
                parallel: true,
                sourceMap: dev
            }),
            new OptimizeCSSAssetsPlugin({})
        ],
        splitChunks: {
            chunks: 'all',
            minSize: 30000,
            maxSize: 0,
            minChunks: 1,
            maxAsyncRequests: 5,
            maxInitialRequests: 3,
            automaticNameDelimiter: '~',
            name: true,
            cacheGroups: {
                vendors: {
                    test: /[\\/]node_modules[\\/]/,
                    priority: -10
                },
                default: {
                    minChunks: 2,
                    priority: -20,
                    reuseExistingChunk: true
                }
            }
        }
    },
    plugins: [
        new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
        new MiniCssExtractPlugin({
            filename: 'Juick.[contenthash].css',
            allChunks: true
        }),
        new HtmlWebPackPlugin({
            template: './src/views/index.html',
            filename: './index.html'
        }),
        new webpack.HotModuleReplacementPlugin(),
        new ErrorOverlayPlugin()
    ],
    devServer: {
        bonjour: true,
        historyApiFallback: true,
        hot: true
    }
}