/*
 * @Author: Johnhong9527
 * @Date:   2020-05-12 16:35:36
 * @Last Modified by:   Johnhong9527
 * @Last Modified time: 2020-05-12 16:35:44
 */
const merge = require("webpack-merge");
const common = require("./webpack.common.config.js");

const HtmlWebpackPlugin = require("html-webpack-plugin");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const OptimizeCssAssetsPlugin = require("optimize-css-assets-webpack-plugin");

module.exports = merge(common, {
  mode: "production",
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader", "postcss-loader"]
      },
      {
        test: /\.less$/,
        use: [
          MiniCssExtractPlugin.loader,
          "css-loader",
          "less-loader",
          "postcss-loader"
        ]
      }
      // {
      //   test: /\.(scss|sass)$/,
      //   use: [
      //     MiniCssExtractPlugin.loader,
      //     'css-loader',
      //     'postcss-loader',
      //     'sass-loader'
      //   ]
      // },
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      filename: "index.html",
      template: "public/index.html",
      inject: "body",
      minify: {
        removeComments: true,
        collapseWhitespace: true
      }
    }),
    new CleanWebpackPlugin(),
    new MiniCssExtractPlugin({
      filename: "css/[name].[hash].css",
      chunkFilename: "css/[id].[hash].css"
    })
  ],
  optimization: {
    minimizer: [
      new UglifyJsPlugin(),
      new OptimizeCssAssetsPlugin({
        assetNameRegExp: /\.css$/g,
        cssProcessor: require("cssnano"),
        cssProcessorPluginOptions: {
          preset: ["default", { discardComments: { removeAll: true } }]
        },
        canPrint: true
      })
    ],
    splitChunks: {
      chunks: "all",
      minSize: 30000,
      maxSize: 0,
      minChunks: 1,
      cacheGroups: {
        framework: {
          test: "framework",
          name: "framework",
          enforce: true
        },
        vendors: {
          priority: -10,
          test: /node_modules/,
          name: "vendor",
          enforce: true
        }
      }
    }
  }
});