const path = require('path')
const NODE_ENV = process.env.NODE_ENV || 'development'
const BuildVersionWebpackPlugin = require('build-version-webpack-plugin')
console.log('NODE_ENV', NODE_ENV)
validProductionApi() // 验证开发环境api地址是否已填写
const devServer = require('./config/dev-server/index') // 开发环境服务配置
const { vueAlias, webpackAlias } = require('./config/alias') // 文件别名配置
console.log(webpackAlias)
const staticGzip = require('./config/static_gzip') // 生成静态gzip文件

// 从command中获取publicPath、outputDir
const { publicPath = '/', outputDir = 'dist' } = getParamsFromCommand(process.argv)
module.exports = {
  publicPath,
  outputDir,
  lintOnSave: false,
  productionSourceMap: true,
  devServer, // 开发服务配置
  css: {
    extract: true
  },
  pluginOptions: { // 全局注入less变量
    'style-resources-loader': {
      preProcessor: 'less',
      patterns: [
        path.resolve(__dirname, 'src/style/variate.less')
      ]
    }
  },
  chainWebpack: config => {
    vueAlias(config.resolve.alias) // 文件别名配置
    return config
  },
  configureWebpack: config => {
    if (NODE_ENV !== 'development') {
      staticGzip(config.plugins) // 静态gzip压缩
      config.plugins.push(new BuildVersionWebpackPlugin()) // 打包git信息
      config.optimization.minimizer[0].options.terserOptions.compress.drop_console = true // 清除console
    }
  }
}

/**
 * 获取打包时输入的参数
 * @param argv {Array<String>}
 * @return 参数对象 {Object}
 */
function getParamsFromCommand (argv) {
  const item = {}
  if (NODE_ENV !== 'development') {
    let arr = []
    argv.map((v, k) => {
      if (k > 2) {
        arr = v.replace('--', '').split('=')
        item[arr[0]] = arr[1]
      }
    })
  }
  console.log(item)
  return item
}

/**
 * production打包时检查proxy是否配置生产环境地址
 */
function validProductionApi () {
  if (NODE_ENV === 'production') {
    const proxyConfig = require(path.resolve(__dirname, 'config/dev-server/proxyConfig'))
    proxyConfig.forEach(config => {
      if (!config.productionTarget) {
        console.error(`error:${config.key}生产环境地址未配置`)
        require('process').exit(1)
      }
    })
  }
}