const path = require("path");
const TerserPlugin = require("terser-webpack-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
const WorkboxPlugin = require("workbox-webpack-plugin");
const HappyPack = require("happypack");
const webpack = require("webpack");
// const HtmlWebpackPlugin = require("html-webpack-plugin");
function resolve(dir) {
  return path.join(__dirname, dir);
}

/** 仅注册已配置 target 的代理，避免 undefined 导致 devServer 启动失败 */
function buildDevProxy(routes) {
  return routes.reduce((proxy, route) => {
    if (!route.target) return proxy;
    const { context, target, pathRewrite, onProxyReq } = route;
    proxy[context] = {
      target,
      changeOrigin: true,
      ...(pathRewrite ? { pathRewrite } : {}),
      ...(onProxyReq ? { onProxyReq } : {}),
    };
    return proxy;
  }, {});
}

module.exports = {
  chainWebpack(config) {
    config.module.rule("svg").exclude.add(resolve("src/icons")).end();
    config.module
      .rule("icons")
      .test(/\.svg$/)
      .include.add(resolve("src/icons"))
      .end()
      .use("svg-sprite-loader")
      .loader("svg-sprite-loader")
      .options({
        symbolId: "icon-[name]",
      })
      .end();

    config.plugin("happypack").use(HappyPack, [
      {
        loaders: ["babel-loader"],
      },
    ]);

    // config.plugin('dll').use(webpack.DllPlugin, [
    //   {
    //     name: '[name]_library',
    //     path: path.join(__dirname, 'dll', '[name]-manifest.json'),
    //   },
    // ]);

    // 仅生产构建注册 Service Worker：dev server（--watch）下 GenerateSW 重复调用
    // 存在已知问题——首次生成的 precache 版本号后续不会正确更新，会导致浏览器
    // 一直用旧缓存响应请求，改代码、重启 dev server、强制刷新都不生效。
    if (process.env.NODE_ENV === "production") {
      config.plugin("workbox").use(WorkboxPlugin.GenerateSW, [
        {
          clientsClaim: true,
          skipWaiting: true,
        },
      ]);
    }
  },

  css: {
    loaderOptions: {
      postcss: {
        postcssOptions: {
          plugins: [require("tailwindcss"), require("autoprefixer")],
        },
      },
      sass: {
        additionalData: `
          @import "@/styles/global.scss";
        `,
      },
    },
  },
  devServer: {
    // contentBase: path.join(__dirname, "public"),
    // 页面 IP/端口：在各 .env.* 中配置 VUE_APP_DEV_HOST、VUE_APP_DEV_PORT
    host: process.env.VUE_APP_DEV_HOST || "localhost",
    port: process.env.VUE_APP_DEV_PORT
      ? Number(process.env.VUE_APP_DEV_PORT)
      : 8080,
    proxy: buildDevProxy([
      {
        context: "/api",
        target: process.env.VUE_APP_APIPROXY,
        pathRewrite: { "^/api": "" },
      },
      {
        context: "/DatangEnosData",
        target: process.env.VUE_APP_DatangEnosData_APIPROXY,
        pathRewrite: { "^/DatangEnosData": "" },
      },
      // 健康分析接口（勿用 /health，避免与路由 /home/health 及 history 回退冲突）
      {
        context: "/healthApi",
        target: process.env.VUE_APP_HEALTH_APIPROXY,
        pathRewrite: { "^/healthApi": "" },
      },
      // 振动、激光测距仪
      {
        context: "/WZLapi",
        target: process.env.VUE_APP_WZLAPIPROXY,
        pathRewrite: { "^/WZLapi": "" },
      },
      {
        context: "/ETLapi",
        target: process.env.VUE_APP_ETLAPIPROXY,
        pathRewrite: { "^/ETLapi": "" },
        onProxyReq(proxyReq) {
          console.log("Proxying /ETLapi request to:", proxyReq.path);
        },
      },
      {
        context: "/tiles",
        target: process.env.VUE_APP_MAP,
        pathRewrite: { "^/tiles": "/tiles" },
      },
      {
        context: "/AnalysisMulti",
        target: process.env.VUE_APP_AnalysisMultiAPIPROXY,
        pathRewrite: { "^/AnalysisMulti": "" },
      },
      {
        context: "/transDataWeb",
        target: process.env.VUE_APP_WZLAPIPROXY,
        pathRewrite: { "^/transDataWeb": "" },
      },
      {
        context: "/sAlgorithm",
        target: process.env.VUE_APP_sAlgorithmAPIPROXY,
        pathRewrite: { "^/sAlgorithm": "" },
      },
      {
        context: "/databaseApi",
        target: process.env.VUE_APP_databaseApiAPIPROXY,
        pathRewrite: { "^/databaseApi": "" },
      },
      {
        context: "/downLoadChart",
        target: process.env.VUE_APP_downLoadChartAPIPROXY,
        pathRewrite: { "^/downLoadChart": "" },
      },
    ]),
  },

  configureWebpack: {
    resolve: {
      alias: {
        "@": resolve("src"),
      },
    },
    optimization: {
      usedExports: true,
      splitChunks: {
        chunks: "all",
      },
      minimize: true,
      minimizer: [new TerserPlugin(), new CssMinimizerPlugin()],
    },
    // plugins: [
    //   new HtmlWebpackPlugin({
    //     filename: "custom-filename.html", // 自定义输出的 HTML 文件名
    //     title: "风机运行管理系统", // 设置页面的标题
    //     // 其他配置...
    //   }),
    //   // 其他插件...
    // ],
  },

  pluginOptions: {
    "style-resources-loader": {
      preProcessor: "sass",
      patterns: [],
    },
  },
  configureWebpack: {
    devtool: "source-map",
  },
};