/* eslint-disable import/no-extraneous-dependencies */
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const path = require('path');

const commonPaths = require('./paths');

module.exports = {
  output: {
    path: commonPaths.outputPath,
    publicPath: '/',
    filename: `${commonPaths.jsFolder}/[name].[chunkhash].js`,
    chunkFilename: `${commonPaths.jsFolder}/[id].[chunkhash].js`,
  },

  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        terserOptions: {
          warnings: false,
          compress: {
            comparisons: false,
          },
          parse: {},
          mangle: true,
          output: {
            comments: false,
            ascii_only: true,
          },
        },
        parallel: true,
      }),
      new CssMinimizerPlugin(),
    ],
    nodeEnv: 'production',
    sideEffects: true,
    concatenateModules: true,
    runtimeChunk: 'single',
    splitChunks: {
      chunks: 'all',
      maxInitialRequests: 10,
      minSize: 0,
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name(module) {
            const packageName = module.context.match(/[\\/]node_modules[\\/](.*?)([\\/]|$)/)[1];
            return `npm.${packageName.replace('@', '')}`;
          },
        },
      },
    },
  },

  module: {
    rules: [
      {
        test: /\.(css|scss)$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              sourceMap: false,
              localsConvention: 'camelCase',
              modules: {
                localIdentName: '[local]___[hash:base64:5]',
              },
            },
          },
          'sass-loader',
        ],
      },
      {
        test: /\.less$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
          },
          {
            loader: 'less-loader', // compiles Less to CSS
            options: {
              lessOptions: {
                javascriptEnabled: true,
              },
            },
          },
        ],
      },
    ],
  },

  resolve: {
    modules: ['node_modules', 'app'],
    alias: {
      app: path.resolve(__dirname, '../', 'app'),
    },
  },

  plugins: [
    new CleanWebpackPlugin(),

    // Minify and optimize the index.html
    new HtmlWebpackPlugin({
      template: commonPaths.templatePath,
      favicon: './app/images/favicon.ico',
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true,
      },
      inject: true,
    }),

    new MiniCssExtractPlugin({
      filename: `${commonPaths.cssFolder}/[name].css`,
      chunkFilename: `${commonPaths.cssFolder}/[id].css`,
    }),
  ],
};