const webpack = require('webpack')
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
const CompressionPlugin = require('compression-webpack-plugin')
// 去除console
const UglifyJsPlugin = require('terser-webpack-plugin')
const LodashModuleReplacementPlugin = require('lodash-webpack-plugin')
const path = require('path')
const resolve = (dir) => path.join(__dirname, dir) // 路径

const IS_PROD = ['production', 'prod'].includes(process.env.NODE_ENV)
const IS_DEV = ['development'].includes(process.env.NODE_ENV)

module.exports = {
  // lintOnSave: false, //关闭eslint检查
  // publicPath: isDev ? '' : querystring.unescape('<%=request.getContextPath()%>'),
  publicPath: process.env.BASE_URL,
  // filenameHashing: false,
  productionSourceMap: false,
  css: {
    requireModuleExtension: true, // 是否开启CSSmodule并保留xxx.module.css后缀
    loaderOptions: {
      less: {
        javascriptEnabled: true
      },
      sass: {
        additionalData: `
        @use 'sass:math';
        @import "@/styles/global.scss";`
      }
    }
  },
  chainWebpack: (config) => {
    // 移除 preload 插件
    config.plugins.delete('preload')
    // 移除 prefetch 插件
    config.plugins.delete('prefetch')
    config
      .plugin('ignore')
      .use(new webpack.ContextReplacementPlugin(/moment[/\\]locale$/, /zh-cn$/))
    config
      // https://webpack.js.org/configuration/devtool/#development
      .when(!IS_PROD, (config) => config.devtool('cheap-source-map'))

    // 配置相关loader，支持修改，添加和替换相关的loader
    config.resolve.alias.set('@', resolve('src'))
    // 打包分析
    if (IS_PROD) {
      config.optimization.delete('splitChunks')
      // config.plugin('webpack-report').use(BundleAnalyzerPlugin, [
      //   {
      //     analyzerMode: 'static'
      //   }
      // ])
    }
    config.plugin('html').tap((args) => {
      args[0].title = 'vue3-antd-admin管理系统'
      return args
    })

    // svg rule loader
    config.module.rule('svg').exclude.add(resolve('src/assets/icons')).end()

    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/assets/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
  },
  configureWebpack: (config) => {
    if (IS_PROD) {
      config.plugins.push(
        new UglifyJsPlugin({
          terserOptions: {
            warnings: false,
            compress: {
              drop_debugger: true, // 注释console
              drop_console: true,
              pure_funcs: ['console.log'] // 移除console
            }
          },
          extractComments: false, // 是否将注释提取到一个单独的文件中
          sourceMap: false,
          parallel: true
        })
        // new CompressionPlugin({
        //     /* [file]被替换为原始资产文件名。
        //        [path]替换为原始资产的路径。
        //        [dir]替换为原始资产的目录。
        //        [name]被替换为原始资产的文件名。
        //        [ext]替换为原始资产的扩展名。
        //        [query]被查询替换。*/
        //     filename: '[path].gz[query]',
        //     //压缩算法
        //     algorithm: 'gzip',
        //     //匹配文件
        //     test: /\.js$|\.css$|\.html$/,
        //     //压缩超过此大小的文件,以字节为单位
        //     threshold: 10240,
        //     minRatio: 0.8,
        //     //删除原始文件只保留压缩后的文件
        //     deleteOriginalAssets: true
        // })
      )
      config.optimization = {
        splitChunks: {
          cacheGroups: {
            common: {
              name: 'chunk-common',
              chunks: 'initial',
              minChunks: 2,
              maxInitialRequests: 5,
              minSize: 0,
              priority: 1,
              reuseExistingChunk: true,
              enforce: true
            },
            vendors: {
              name: 'chunk-vendors',
              test: /[\\/]node_modules[\\/]/,
              chunks: 'initial',
              priority: 2,
              reuseExistingChunk: true,
              enforce: true
            },
            antd: {
              name: 'chunk-ant-design-vue',
              test: /[\\/]node_modules[\\/]ant-design-vue[\\/]/,
              chunks: 'all',
              priority: 3,
              reuseExistingChunk: true,
              enforce: true
            }
          }
        }
      }
    }
  },
  devServer: {
    proxy: {
      '/api': {
        target: process.env.VUE_APP_API_URL,
        // target: 'http://localhost:8888',
        changeOrigin: true,
        logLevel: 'debug',
        pathRewrite: {
          '^/api': ''
        }
      }
    }
  }
}