'use strict'

const path = require('path')
const buildConf = require('./build.config')
const packageConf = require('./package.json')

function resolve(dir) {
  return path.join(__dirname, dir)
}
module.exports = {
  // 基础配置 详情看文档
  publicPath: './',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  devServer: {
    port: process.env.VUE_APP_CLI_PORT,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      // 把key的路径代理到target位置
      // detail: https://cli.vuejs.org/config/#devserver-proxy
      [process.env.VUE_APP_BASE_API]: { // 需要代理的路径   例如 '/api'
        target: `${process.env.VUE_APP_BASE_PATH}:${process.env.VUE_APP_SERVER_PORT}/`, // 代理到 目标路径
        changeOrigin: true,
        pathRewrite: { // 修改路径数据
          ['^' + process.env.VUE_APP_BASE_API]: '' // 举例 '^/api:""' 把路径中的/api字符串删除
        }
      }
    }
  },
  configureWebpack: {
    // @路径走src文件夹
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  chainWebpack(config) {
    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()
    config
      // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          // 不打包 begin
          // 1.目前已经测试通过[vue,axios,echarts]可以cdn引用，其它组件测试通过后可继续添加
          // 2.此处添加不打包后，需在public/index.html head中添加相应cdn资源链接
          config.set('externals', buildConf.cdns.reduce((p, a) => {
            p[a.name] = a.scope
            return p
          }, {}))
          // 不打包 end

          config.plugin('html')
            .tap(args => {
              if (buildConf.title) {
                args[0].title = buildConf.title
              }
              if (buildConf.cdns.length > 0) {
                args[0].cdns = buildConf.cdns.map(conf => {
                  if (conf.path) {
                    conf.js = `${buildConf.baseCdnUrl}${conf.path}`
                  } else {
                    conf.js = `${buildConf.baseCdnUrl}/${conf.name}/${packageConf.dependencies[conf.name].replace('^', '')}/${conf.name}.min.js`
                  }
                  return conf
                })
              }
              return args
            })

          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
              // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /single\..*\.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
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
  }
}