const CompressionWebpackPlugin = require("compression-webpack-plugin");
const { transformElementScss } = require("ele-admin/lib/utils/dynamic-theme");
const path = require("path");
const { name } = require("./package.json");

function resolve(dir) {
  return path.join(__dirname, dir);
}

// 与 EOM(/eos)、WT(/wt) 一致：静态资源部署在短路径 /hr，乾坤路由前缀才是 /page-hr
const publicPath = process.env.VUE_APP_PUBLIC_PATH || "/hr";

/**
 * 本地 /api 代理。
 * - 直连后端（18086 等）：接口在根路径，需要剥掉 /api
 * - 网关/nginx（51010 等）：/api 才是接口，剥掉会打到前端 HTML（ele-admin-template）
 */
function resolveApiProxyTarget(rawTarget) {
  const target = String(rawTarget || "")
    .trim()
    .replace(/\/$/, "");
  const alreadyHasApi = /\/api$/i.test(target);
  const isDirectBackend = /:(18086|18087|18186|18187)(\/|$)/.test(target);
  return {
    target: alreadyHasApi ? target.replace(/\/api$/i, "") : target,
    keepApiPrefix: alreadyHasApi || !isDirectBackend,
  };
}

function stripProxyCacheHeaders(proxyRes) {
  proxyRes.headers["cache-control"] = "no-store, no-cache, must-revalidate";
  proxyRes.headers.pragma = "no-cache";
  proxyRes.headers.expires = "0";
  delete proxyRes.headers.etag;
  delete proxyRes.headers["last-modified"];
  const contentType = String(proxyRes.headers["content-type"] || "");
  if (proxyRes.statusCode === 200 && contentType.includes("text/html")) {
    proxyRes.statusCode = 502;
  }
}

const apiProxy = resolveApiProxyTarget(
  process.env.VUE_APP_PROXY_TARGET ||
    // "http://192.168.1.147:18090",
    "http://aiot.zoomwin.com.cn:51010",
);

// element-ui / ele-admin 仍使用 Sass @import，静音 Dart Sass 弃用警告
const sassOptions = {
  outputStyle: "expanded",
  importer: transformElementScss(),
  quietDeps: true,
  silenceDeprecations: [
    "import",
    "global-builtin",
    "color-functions",
    "slash-div",
    "legacy-js-api",
  ],
};

module.exports = {
  publicPath,
  lintOnSave: false,
  outputDir: "dist",
  productionSourceMap: false,
  configureWebpack: {
    performance: {
      maxAssetSize: 2000000,
      maxEntrypointSize: 2000000,
    },
    output: {
      // 与 EOM/WT 一致：子应用打包成 umd 库格式
      library: {
        type: "umd",
        name: `${name}`,
      },
      chunkLoadingGlobal: `webpackJsonp_${name}`,
    },
    // Vue2 + vue-style-loader：样式靠副作用注入，不导出 default；
    // Webpack5 会对 `import style0 from ...` 报 missing export，可安全忽略
    ignoreWarnings: [
      {
        message:
          /export ['"]default['"] \(imported as ['"]style\d+['"]\) was not found/,
      },
    ],
  },

  devServer: {
    port: Number(process.env.VUE_APP_PORT || process.env.PORT || 8091),
    open: [publicPath.endsWith("/") ? publicPath : `${publicPath}/`],
    historyApiFallback: {
      index: path.posix.join(
        publicPath.endsWith("/") ? publicPath : `${publicPath}/`,
        "index.html",
      ),
      htmlAcceptHeaders: ["text/html"],
      rewrites: [
        {
          from: /^\/(api|kkfile)(\/|$)/,
          to: (context) => context.parsedUrl.pathname,
        },
      ],
    },
    setupMiddlewares(middlewares) {
      middlewares.unshift({
        name: "redirect-to-app",
        middleware(req, res, next) {
          const url = (req.url || "").split("?")[0];
          const appIndex = publicPath.endsWith("/")
            ? publicPath
            : `${publicPath}/`;
          if (
            url === "/" ||
            url === "/page-hr" ||
            url === "/page-hr/" ||
            url === "/hr-pc" ||
            url === "/hr-pc/"
          ) {
            res.redirect(appIndex);
            return;
          }
          next();
        },
      });
      return middlewares;
    },
    proxy: {
      "/api": {
        target: apiProxy.target,
        changeOrigin: true,
        pathRewrite: apiProxy.keepApiPrefix ? undefined : { "^/api": "" },
        onProxyRes: stripProxyCacheHeaders,
      },
      "/kkfile": {
        target: "http://aiot.zoomwin.com.cn:51010",
        changeOrigin: true,
        pathRewrite: { "^/kkfile": "/kkfile" },
      },
    },
    headers: {
      "Access-Control-Allow-Origin": "*",
    },
  },
  chainWebpack(config) {
    config.plugins.delete("prefetch");
    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();

    if (process.env.NODE_ENV !== "development") {
      config.plugin("compressionPlugin").use(
        new CompressionWebpackPlugin({
          test: /\.(js|css|html)$/,
          threshold: 10240,
        }),
      );
    }
  },
  css: {
    loaderOptions: {
      css: {
        esModule: false,
      },
      sass: { sassOptions },
      scss: { sassOptions },
    },
  },
};