const { HotModuleReplacementPlugin, SourceMapDevToolPlugin } = require('webpack')
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const TerserPlugin = require('terser-webpack-plugin')
const path = require('path')

const lessLoader = {
    loader: 'less-loader',
    options: {
        lessOptions: {
            javascriptEnabled: true,
        },
    },
}

module.exports = {
    cache: true,
    performance: false,
    mode: 'development',
    devtool: 'source-map',
    optimization: {
        minimizer: [
            new CssMinimizerPlugin(),
            new TerserPlugin(),
        ],
        flagIncludedChunks: false,
        usedExports: false,
        sideEffects: false,
        concatenateModules: false,
        emitOnErrors: true,
        nodeEnv: 'development',
        minimize: false,
    },
    output: {
        path: path.resolve(__dirname, 'dev_build'),
        pathinfo: true,
    },
    stats: 'errors-warnings',
    module: {
        unsafeCache: true,
        rules: [
            {
                test: /\.css$/i,
                use: [
                    MiniCssExtractPlugin.loader,
                    'css-loader'
                ],
            },
            {
                test: /\.less$/i,
                exclude: path.resolve(__dirname, 'src/styles/include/'),
                use: [
                    MiniCssExtractPlugin.loader,
                    'css-loader',
                    lessLoader,
                ],
            },
            {
                test: /\.less$/i,
                include: path.resolve(__dirname, 'src/styles/include/'),
                use: [
                    'style-loader',
                    'css-loader',
                    lessLoader,
                ]
            },
        ]
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename: '[name].[contenthash:8].css',
        }),
        new HotModuleReplacementPlugin(),
        new SourceMapDevToolPlugin({ filename: 'maps/[file].map' }),
    ],
}