const path = require('path')
const webpack = require('webpack')
const ThemeColorReplacer = require('webpack-theme-color-replacer')
const { getThemeColors, modifyVars, getVxeTableStyle } = require('./src/utils/themeUtil')
const { resolveCss } = require('./src/utils/theme-color-replacer-extend')
const CompressionWebpackPlugin = require('compression-webpack-plugin')

const productionGzipExtensions = ['js', 'css', 'less', 'scss']
const isProd = process.env.NODE_ENV === 'production'
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
const assetsCDN = {
  // webpack build externals
  externals: {
    vue: 'Vue',
    'vue-router': 'VueRouter',
    vuex: 'Vuex',
    axios: 'axios',
    nprogress: 'NProgress',
    clipboard: 'ClipboardJS',
    '@antv/data-set': 'DataSet',
    // 'js-cookie': 'Cookies',
    'xe-utils': 'XEUtils',
    'vxe-table': 'VXETable',
    'viser-vue': 'ViserVue'
  },
  css: [
  ],
  js: [
    '//cdn.jsdelivr.net/npm/vue@2.6.11/dist/vue.min.js',
    '//cdn.jsdelivr.net/npm/vue-router@3.3.4/dist/vue-router.min.js',
    '//cdn.jsdelivr.net/npm/vuex@3.4.0/dist/vuex.min.js',
    '//cdn.jsdelivr.net/npm/axios@0.19.2/dist/axios.min.js',
    '//cdn.jsdelivr.net/npm/nprogress@0.2.0/nprogress.min.js',
    '//cdn.jsdelivr.net/npm/clipboard@2.0.6/dist/clipboard.min.js',
    '//cdn.jsdelivr.net/npm/@antv/data-set@0.11.4/build/data-set.min.js',
    // '//cdn.jsdelivr.net/npm/js-cookie@2.2.1/src/js.cookie.min.js',
    '//cdn.jsdelivr.net/npm/xe-utils@3.5.4/dist/xe-utils.umd.min.js',
    '//cdn.jsdelivr.net/npm/vxe-table@3.5.4/lib/index.umd.min.js',
    '//cdn.jsdelivr.net/npm/viser-vue@2.4.8/umd/viser-vue.min.js'
  ]
}

module.exports = {
  devServer: {
    port: 8080,
    proxy: {
      [process.env.VUE_APP_API_BASE_URL]: { // 此处要与 /services/api.js 中的 API_PROXY_PREFIX 值保持一致
        target: 'http://192.168.7.117:9005',
        changeOrigin: true,
        pathRewrite: {
          ['^' + process.env.VUE_APP_API_BASE_URL]: ''
        }
      }
    },
    overlay: {
      warnings: false,
      errors: false
    },
    compress: true,
    disableHostCheck: true // webpack4.0 开启热更新
  },
  pluginOptions: {
    'style-resources-loader': {
      preProcessor: 'less',
      patterns: [path.resolve(__dirname, './src/theme/theme.less')]
    },
    windicss: {}
  },
  configureWebpack: config => {
    config.entry.app = ['babel-polyfill', 'whatwg-fetch', './src/main.js']
    config.performance = {
      hints: false
    }
    config.plugins.push(
      new ThemeColorReplacer({
        fileName: 'css/theme-colors-[contenthash:8].css',
        matchColors: getThemeColors(),
        injectCss: true,
        resolveCss
      })
    )
    // 生产环境取消 console.log
    if (isProd) {
      config.optimization.minimizer[0].options.terserOptions.compress.drop_console = true
    }
    if (isProd) {
      config.plugins.push(new BundleAnalyzerPlugin())
    }
    // Ignore all locale files of moment.js
    config.plugins.push(new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/))
    // 生产环境下将资源压缩成gzip格式
    if (isProd) {
      // add `CompressionWebpack` plugin to webpack plugins
      config.plugins.push(new CompressionWebpackPlugin({
        algorithm: 'gzip',
        test: new RegExp('\\.(' + productionGzipExtensions.join('|') + ')$'),
        threshold: 10240,
        minRatio: 0.8
      }))
    }
    // if prod, add externals
    if (isProd) {
      config.externals = assetsCDN.externals
    }
  },
  chainWebpack: config => {
    // 生产环境下关闭css压缩的 colormin 项，因为此项优化与主题色替换功能冲突
    if (isProd) {
      config.plugin('optimize-css')
        .tap(args => {
          args[0].cssnanoOptions.preset[1].colormin = false
          return args
        })
    }
    // 生产环境下使用CDN
    if (isProd) {
      config.plugin('html')
        .tap(args => {
          args[0].cdn = assetsCDN
          return args
        })
    }
  },
  css: {
    loaderOptions: {
      less: {
        lessOptions: {
          modifyVars: modifyVars(),
          javascriptEnabled: true
        }
      },
      sass: {
        // prependData: `@import "./src/theme/vxe-table/night.scss";`
        prependData: getVxeTableStyle()
      }
    }
  },
  publicPath: process.env.VUE_APP_PUBLIC_PATH,
  outputDir: 'dist',
  assetsDir: 'static',
  productionSourceMap: false,
  lintOnSave: false
}