'use strict'
const path = require('path')

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

const port = 9527 // TODO: change to Settings

// Explanation of each configuration item You can find it in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You can set by yourself according to actual condition
   * You will need to set this 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 assetsPublicPath 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 !== 'production',
  productionSourceMap: false,
  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      '/api': {
        target: `http://localhost:${port}/mock`,
        changeOrigin: true,
        pathRewrite: {
          '^/api': ''
        }
      }
    },
    after(app) {
      console.log('apple')
      const bodyParser = require('body-parser')
      require('@babel/register')
      // parse app.body
      // http://expressjs.com/en/4x/api.html#req.body
      app.use(bodyParser.json())
      app.use(bodyParser.urlencoded({
        extended: true
      }))

      // import ES2015 module from common.js module
      const { default: mocks } = require('./mock')
      for (const mock of mocks) {
        app.all(mock.route, mock.response)
      }
    }
  },
  configureWebpack: {
    // We 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: 'vue-element-admin', // TODO: change to Settings
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  chainWebpack(config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test
    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.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()
    config
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .use('script-ext-html-webpack-plugin', [{
              // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // 只打包初始时依赖的第三方
                },
                elementUI: {
                  name: 'chunk-elementUI', // 单独将 elementUI 拆包
                  priority: 20, // 权重要大于 libs 和 app 不然会被打包进 libs 或者 app
                  test: /[\\/]node_modules[\\/]element-ui[\\/]/
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // 可自定义拓展你的规则
                  minChunks: 3, // 最小公用次数
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
  }
}