// vue.config.js
const path = require('path');
const IS_PROD = ['production', 'prod'].includes(process.env.NODE_ENV);
const resolve = (dir) => path.join(__dirname, dir);
const UglifyJsPlugin = require("uglifyjs-webpack-plugin"); // 去掉 console.log
//打包分析
const BundleAnalyzerPlugin = require("webpack-bundle-analyzer")
  .BundleAnalyzerPlugin;
module.exports = {
  publicPath: "./", // 默认'/'，部署应用包时的基本 URL
  indexPath: 'index.html', // 相对于打包路径index.html的路径
  outputDir: 'dist', // 'dist', 生产环境构建文件的目录
  assetsDir: 'static', // 相对于outputDir的静态资源(js、css、img、fonts)目录
  lintOnSave: false, // 是否在开发环境下通过 eslint-loader 在每次保存时 lint 代码
  runtimeCompiler: true, // 是否使用包含运行时编译器的 Vue 构建版本
  productionSourceMap: !IS_PROD, // 生产环境的 source map
  chainWebpack: config => {

    config.resolve.symlinks(true); // 修复热更新失效
    // 添加别名
    config.resolve.alias
      .set('@', resolve('src'))
      .set('@api', resolve('src/api'))
      .set('@tools', resolve('src/tools'))
      .set('@assets', resolve('src/assets'))
      .set('@components', resolve('src/components'))
      .set('@views', resolve('src/views'))
      .set('@router', resolve('src/router'))
      .set('@store', resolve('src/store'))
      .set('@layout',resolve('src/layout'))
      .set('@utils',resolve('src/utils'))
      .set('@jsonData', resolve('src/jsonData'));
    // 压缩图片
    if (IS_PROD) {
      config.module
        .rule("images")
        .use("image-webpack-loader")
        .loader("image-webpack-loader")
        .options({
          mozjpeg: { progressive: true, quality: 65 },
          optipng: { enabled: false },
          pngquant: { quality: [0.65, 0.9], speed: 4 },
          gifsicle: { interlaced: false }
          // webp: { quality: 75 }
        });
    }
  },
  css: {
    loaderOptions: {
      sass: {
        prependData: `@import "./src/assets/css/default";`,
      },
    },
  },
  // 去掉console.log
  configureWebpack: config => {
    if (IS_PROD) {
      const plugins = [];
      plugins.push(
        new UglifyJsPlugin({
          uglifyOptions: {
            compress: {
              drop_console: true,
              drop_debugger: false,
              pure_funcs: ["console.log"] //移除console
            }
          },
          sourceMap: false,
          parallel: true
        })
      );
      config.plugins = [...config.plugins, ...plugins];
    }
  },
  devServer: {
    //代理配置
    proxy:{
      //这里的api表示请求的地址有apizzzs,就触发代理机制
      '/apizzz':{
        target:'www.baidu.com',//我们要代理的地址
        changeOrigin:true,//是否跨域
        pathRewrite:{
          //'^/api',''//假设想把 localhost:8080/api/login 变成www.baidu.com/login就需要这么做
        }
      }
    },
    open: true, // 是否打开浏览器
  },
  //打包分析
  chainWebpack: config => {
    // 打包分析
    if (IS_PROD) {
      config.plugin("webpack-report").use(BundleAnalyzerPlugin, [
        {
          analyzerMode: "static"
        }
      ]);
    }
  }

}