'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')

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

let cdn = {
  css: [],
  js: []
}

let externals = {}

const isProduction = process.env.NODE_ENV === 'production'

if (isProduction) {
  cdn = {
    css: [
      'https://unpkg.com/element-ui/lib/theme-chalk/index.css' // element-ui css 样式表
    ],
    js: [
    // vue must at first!
      'https://unpkg.com/vue/dist/vue.js', // vuejs
      'https://unpkg.com/element-ui/lib/index.js', // element-ui js
      'https://cdn.jsdelivr.net/npm/xlsx@0.16.6/dist/jszip.min.js',
      'https://cdn.jsdelivr.net/npm/xlsx@0.16.6/dist/xlsx.full.min.js',
      'https://cdn.bootcdn.net/ajax/libs/moment.js/2.29.1/moment.min.js',
      'https://cdn.bootcdn.net/ajax/libs/vuex/3.1.0/vuex.min.js',
      'https://cdn.bootcdn.net/ajax/libs/vue-router/3.0.6/vue-router.min.js'
    ]
  }
  externals = {
    // key(要排除的包名), value(引入的CDN包的全局变量名)
    'vue': 'Vue',
    'element-ui': 'ELEMENT',
    'xlsx': 'XLSX',
    'moment': 'moment',
    'vue-router': 'VueRouter',
    'vuex': 'Vuex'
  }
}

const name = defaultSettings.title || 'vue Admin Template' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 9528 npm run dev OR npm run dev --port = 9528
// const port = process.env.port || process.env.npm_config_port || 8080 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: '/',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  devServer: {
    port: 8088,
    open: true,
    // 配置反向代理，，，，开发阶段会生效
    proxy: {
      // 代表将来如果url地址以/api开头，就会自动代理到对应的服务器
      // /api/company/department
      '/api': {
        target: 'http://ihrm-java.itheima.net'
        // target: 'http://localhost:3000'
        // pathRewrite: { '^/aa': '' }
      }
    },
    overlay: {
      warnings: false,
      errors: true
    },
    headers: {
      'Access-Control-Allow-Origin': '*'
    }
  },
  configureWebpack: {
    output: {
      library: `${name}-[name]`,
      libraryTarget: 'umd', // 把微应用打包成 umd 库格式
      jsonpFunction: `webpackJsonp_${name}`
    },
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    },
    externals
  },
  chainWebpack(config) {
    // it can improve the speed of the first screen, it is recommended to turn on preload
    config.plugin('preload').tap(() => [
      {
        rel: 'preload',
        // to ignore runtime.js
        // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
        fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
        include: 'initial'
      }
    ])
    // 注入cdn变量 (打包时会执行)
    // 把cdn对象注入到index.html中
    config.plugin('html').tap(args => {
      args[0].cdn = cdn // 配置cdn给插件
      return args
    })

    // when there are many pages, it will cause too many meaningless requests
    config.plugins.delete('prefetch')

    // set svg-sprite-loader
    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
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-elementUI', // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
          config.optimization.runtimeChunk('single')
        }
      )
  }
}