'use strict'

const path = require('path')
const defaultSettings = require('./src/settings.js')
const CompressionWebpackPlugin = require('compression-webpack-plugin')
// 定义压缩文件类型
const productionGzipExtensions = ['js', 'css']
function resolve(dir) {
  return path.join(__dirname, dir)
}
const name = defaultSettings.title || 'Easy Bpm' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 9528 npm run dev OR npm run dev --port = 9528
const NODE_ENV = process.env.NODE_ENV || 'development'
const config = require(`./config/${NODE_ENV}`)
const webpack = require('webpack')

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath 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 publicPath 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 === 'development',
  productionSourceMap: false,
  devServer: config.devServer,
  // 默认情况下 babel-loader 会忽略所有 node_modules 中的文件。

  // 如果你想要通过 Babel 显式转译一个依赖，可以在这个选项中列出来
  // transpileDependencies: ['node_modules/webpack-dev-server/client'],

  configureWebpack: config => {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    config.entry.app = ['@babel/polyfill', './src/main.js']

    config.name = name
    config.resolve.alias['@'] = resolve('src')
    config.plugins.push(
      new webpack.ProvidePlugin({
        $: 'jquery',
        jQuery: 'jquery',
        'windows.jQuery': 'jquery'
      })
    )
    config.performance = {
      hints: 'warning',
      // 入口起点的最大体积 整数类型（以字节为单位）
      maxEntrypointSize: 50000000,
      // 生成文件的最大体积 整数类型（以字节为单位 300k）
      maxAssetSize: 30000000,
      // 只给出 js 文件的性能提示
      assetFilter: function(assetFilename) {
        return assetFilename.endsWith('.js')
      }
    }
    if (process.env.NODE_ENV === 'production') {
      // 生产环境
      // 编译时删除console.log
      config.optimization.minimizer[0].options.terserOptions.compress.drop_console = true
      //  配置productionGzip-高级的方式
      // 配置参数详解
      // asset： 目标资源名称。 [file] 会被替换成原始资源。[path] 会被替换成原始资源的路径， [query] 会被替换成查询字符串。默认值是 "[path].gz[query]"。
      // algorithm： 可以是 function(buf, callback) 或者字符串。对于字符串来说依照 zlib 的算法(或者 zopfli 的算法)。默认值是 "gzip"。
      // test： 所有匹配该正则的资源都会被处理。默认值是全部资源。
      // threshold： 只有大小大于该值的资源会被处理。单位是 bytes。默认值是 0。
      // minRatio： 只有压缩率小于这个值的资源才会被处理。默认值是 0.8。
      config.plugins.push(
        new CompressionWebpackPlugin({
          filename: '[path].gz[query]',
          algorithm: 'gzip',
          test: new RegExp('\\.(' + productionGzipExtensions.join('|') + ')$'),
          threshold: 10240,
          minRatio: 0.8,
          // 如果觉得项目打包后体积很大 可以删除源文件
          deleteOriginalAssets: false // 删除原文件

        })
      )
    } else {
      // 开发环境
    }
  },
  css: {
    loaderOptions: {
      less: {
        modifyVars: {
          'primary-color': '#a8d4f7',
          'layout-color': '#9867f7'
        },
        javascriptEnabled: true
      }
    }
  },
  chainWebpack(config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test

    // set svg-sprite-loader
    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
    //   .use('px2rem-loader')
    //   .loader('px2rem-loader')
    //   .options({ emUnit: 75 })
    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config.module.rule('bpmnlintrc').test(/\.bpmnlintrc$/).use('bpmnlint-loader').loader('bpmnlint-loader').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 => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.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')
        }
      )
  }
}