const path = require("path");
// 引入打包分析文件
const { BundleAnalyzerPlugin } = require("webpack-bundle-analyzer");
// 引入Gzip压缩文件
const CompressionPlugin = require("compression-webpack-plugin");
// 引入js打包工具
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");

const resolve = dir => path.join(__dirname, dir);

const { NODE_ENV, OUT_PUT } = process.env;

module.exports = {
  outputDir: OUT_PUT,
  lintOnSave: false,
  publicPath: NODE_ENV === "production" ? "/" : "/",
  runtimeCompiler: true,
  productionSourceMap: false, //关闭生产环境下的SourceMap映射文件
  chainWebpack: (config) => {
    config.resolve.alias
      .set('@', resolve('src'))
      .set("scss_vars", "@/styles/vars.scss")
      .set("index_scss", "@/styles/index.scss")
      .set("api", "@/api")
      .set("utils", "@/utils")
      .set("components", "@/components")
      .set("common", "@/common");
    config.resolve.extensions.add(".js").add(".vue").add(".json");
  },
  configureWebpack: (config) => {
    config.output.filename = "js/[name].[hash].js";
    config.output.chunkFilename = "js/[id].[hash].js";

    config.optimization = {
      usedExports: true,
    };

    config.externals = {
      luckysheet: "luckySheet",
    };

    const pluginsPro = [
      new CompressionPlugin({
        algorithm: "gzip",
        test: /\.js$|\.html$|\.css$/, // 匹配文件名
        minRatio: 0.8, // 压缩率小于1才会压缩
        threshold: 10240, // 对超过10k的数据压缩
        deleteOriginalAssets: false, // 是否删除未压缩的源文件
      }),
      new UglifyJsPlugin({
        uglifyOptions: {
          compress: {
            drop_debugger: true,
            drop_console: true, //生产环境自动删除console
            pure_funcs: ["console.log"], //移除console
          },
        },
        sourceMap: false,
        parallel: true, //使用多进程并行运行来提高构建速度。默认并发运行数：os.cpus().length - 1。
      }),
    ];
    if (NODE_ENV !== "development") {
      config.plugins = [...config.plugins, ...pluginsPro];
    }
  },
  devServer: {
    port: "3030",
    open: false,
    proxy: {
      "/adminapi": {
        target: "http://8.136.199.33:7778",
        // target: "http://8.136.199.33:8602",
        changeOrigin: true, //允许跨域
        pathRewrite: {
          "^/adminapi": "/adminapi",
        },
      },
    },
  },
};