const path = require('path')

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

// 打包文件位置
function diffOutputDir () {
  if (process.env.NODE_ENV === 'development') {
    return './dist'
  } else if (process.env.NODE_ENV === 'production') {
    return './jinshui-screen'
  }
}
// 生产环境-资源引用路径
function diffPublicPath () {
  if (process.env.NODE_ENV === 'development') {
    return './'
  } else if (process.env.NODE_ENV === 'production') {
    return './'
  }
}

module.exports = {
  // 资源根路径
  publicPath: diffPublicPath(),

  // 打包根路径
  outputDir: diffOutputDir(),

  // 静态资源文件夹名
  assetsDir: 'static',

  // 保存时是否使用 eslint-loader
  lintOnSave:false,

  // 生产环境 source map
  productionSourceMap: false,

  // 调整 webpack 配置
  chainWebpack: config => {
    config.plugins.delete('prefetch')
    config.resolve.alias
      .set('api', join('src/api'))
      .set('assets', join('src/assets'))
      .set('components', join('src/components'))
      .set('directives', join('src/directives'))
      .set('directives', join('src/directives'))
      .set('style', join('src/style'))
      .set('utils', join('src/utils'))
      .set('views', join('src/views'))
    config.module
      .rule('svg')
      .include.add(join('src/components/svg-icon/svg'))
      .end()
      .test(/\.svg$/)
      .use('file-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
    // 修复HMR
    config.resolve.symlinks(true)
    // 打包结果分析
    if (process.env.NODE_ENV === 'development') {
      config.plugin('webpack-bundle-analyzer').use(require('webpack-bundle-analyzer').BundleAnalyzerPlugin)
    }
  },

  // 调整 webpack 配置
  configureWebpack: config => {
    config.devtool = process.env.NODE_ENV === 'production' ? 'none' : 'cheap-eval-source-map'
    if (process.env.NODE_ENV === 'production') {
      config.externals = {
        echarts: 'echarts',
        vue: 'Vue',
        'element-ui': 'ELEMENT'
      }
    } else {
      config.externals = {
        echarts: 'echarts'
      }
    }
  },

  // css 相关
  css: {
    // 将组件内的 css 提取到 一个单独的文件
    // extract: true,
    // 是否开启 css source map
    sourceMap: false,
    // 为预处理器的 loader 传递自定义选项
    loaderOptions: {}
  },

  // 开发环境  dev-server
  devServer: {
    open: false,
    host: '0.0.0.0',
    port: 9090,
    proxy: {
      '/api': {
        target: 'http://127.0.0.1:10001/api/',
        pathRewrite: {
          '^/api': ''
        },
        logLevel: 'debug',
        changeOrigin: true,
        secure: false
      }
    },
    https: false,
    hotOnly: true,
    before: app => {}
  }
}