const webpack = require("webpack");
const common = require("./webpack.common");
const merge = require("webpack-merge");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const TerserPlugin = require("terser-webpack-plugin");
const CssMinimizer = require("optimize-css-assets-webpack-plugin");
const PurgeCssPlugin = require("purgecss-webpack-plugin");
const glob = require("glob");
const path = require("path")

module.exports = merge(common, {
  mode: "production",
  devtool: "none",
  output: {
    filename: "[name].[contenthash].min.js",
    chunkFilename: "[id].[name].[contenthash].min.js",
    publicPath: "dist/",
  },
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
          "style-loader",
          MiniCssExtractPlugin.loader,
          "css-loader",
          "postcss-loader",
          "sass-loader",
        ],
      },
    ],
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: "[name].[contenthash].min.css",
      chunkFilename: "[name].[contenthash].min.css",
      sourceMap: true,
    }),
    new webpack.HashedModuleIdsPlugin(),
    new PurgeCssPlugin({
      paths: glob.sync(path.join(__dirname, "layouts") + "/**/*.html", {
        nodir: true,
      }),
    }),
  ],
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({ extractComments: false }),
      new CssMinimizer(),
    ],
  },
});