'use strict'
const webpack = require('webpack')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const path = require('path')
const defaultSettings = require('./public/config/project.config')

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

const name = defaultSettings.title || '管网运行监测系统' // 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 method:
// port = 9527 npm run dev OR npm run dev --port = 9527
const port = process.env.port || process.env.npm_config_port || 9527 // dev port

// 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', // 是否开启eslint
  productionSourceMap: false, // 不需要生产环境的sourcemap
  devServer: { // development server config
    // host: 'localhost',
    port: port, // 端口号
    open: true, // 配置自动启动浏览器
    overlay: {
      warnings: false,
      errors: true
    },
    before: require('./mock/mock-server.js'),
    proxy: {
      '/5002': {
        target: 'http://60.208.121.150:5002/', // 配置访问的服务器地址
        pathRewrite: { '^/5002': '' }, // 用于将请求中的 /api 字符串替换为空, 然后访问地址就能正确访问，若不添加此行配置，那么访问地址就变成了： http://localhost:5000/api/request_url，这样的请求就会出现 404 操作
        ws: true, // 是否支持 webstocket, 默认是 true
        changeOrigin: true // 用于控制请求头中的 host 值, 默认是 ture
      }
    }
  },
  // webpack config, if value is an object, it well be merge to final config using webpack-merge
  configureWebpack: (config) => {
    const cesiumSourcePath = 'node_modules/mars3d-cesium/Build/Cesium/' // cesium库安装目录
    const cesiumRunPath = './mars3d-cesium/' // cesium运行时路径

    const plugins = [
      // 标识cesium资源所在的主目录，cesium内部资源加载、多线程等处理时需要用到
      new webpack.DefinePlugin({
        CESIUM_BASE_URL: JSON.stringify(path.join(config.output.publicPath, cesiumRunPath))
      }),
      // Cesium相关资源目录需要拷贝到系统目录下面（部分CopyWebpackPlugin版本的语法可能没有patterns）
      new CopyWebpackPlugin({
        patterns: [
          { from: path.join(cesiumSourcePath, 'Workers'), to: path.join(config.output.path, cesiumRunPath, 'Workers') },
          { from: path.join(cesiumSourcePath, 'Assets'), to: path.join(config.output.path, cesiumRunPath, 'Assets') },
          { from: path.join(cesiumSourcePath, 'ThirdParty'), to: path.join(config.output.path, cesiumRunPath, 'ThirdParty') },
          { from: path.join(cesiumSourcePath, 'Widgets'), to: path.join(config.output.path, cesiumRunPath, 'Widgets') }
        ]
      })
    ]
    return {
      name: name,
      resolve: {
        alias: {
          '@': resolve('src')
        }
      },
      externals: {
        'AMap': 'AMap'
      },
      module: { unknownContextCritical: false }, // 配置加载的模块类型，cesium时必须配置
      plugins: plugins
    }
  },
  // A function that well receive an instance of ChanableConfig powered by webpack-chain. Allows
  // for more fine-grained modification of the internal webpack config
  chainWebpack: config => {
    // it can improve the speed of the first screen, it is recommended to turn on preload
    config.plugin('preload').tap(() => [
      {
        rel: 'preload',
        // to ignore runtime.js
        // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
        fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
        include: 'initial'
      }
    ])

    // when there are many pages, it will cause too many meaningless requests
    config.plugins.delete('prefetch')

    // 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
      .when(process.env.NODE_ENV !== 'development',
        config => {
          // runtime 代码由于只是驱动不同路由页面的关系，代码量比较少，请求 js 的时间都大于执行时间了，
          // 所以使用 script-ext-html-webpack-plugin 插件将其内链在 index.html 中比较友好。
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          // 如果使用了某些长期不会改变的库，像 element-ui ，打包完成有 600 多 KB ，
          // 包含在默认 vendor 中显然不合适，每次用户都要加载这么大的文件体验不好，所以要单独打包：
          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
                }
              }
            })
          // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
          config.optimization.runtimeChunk('single')
        }
      )
  }
}