'use strict'
// Template version: 1.3.1
// see http://vuejs-templates.github.io/webpack for documentation.

const path = require('path') 

const webpack = require('webpack')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
const CompressionWebpackPlugin = require('compression-webpack-plugin')
function resolve(dir) {
    return path.join(__dirname, dir);
}
module.exports = {
  dev: {

    // Paths
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {
      '/api': {
        target: 'http://42.192.164.187:19005',
        ws: true,
        changeOrigin: false,
        pathRewrite: {
          "^/api": ""
        }
      }
    },

    // Various Dev Server settings
    host: '0.0.0.0', // can be overwritten by process.env.HOST
    port: 8080, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
    autoOpenBrowser: true,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-

    
    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'cheap-module-eval-source-map',

    // If you have problems debugging vue-files in devtools,
    // set this to false - it *may* help
    // https://vue-loader.vuejs.org/en/options.html#cachebusting
    cacheBusting: true,

    cssSourceMap: true
  },

  build: {
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),

    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',

    /**
     * Source Maps
     */

    // productionSourceMap: true,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: true,
    productionGzipExtensions: ['js', 'css'],

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report,
    
  lintOnSave: false,//禁用代码检测
  productionSourceMap: false,
  chainWebpack: config => {
      // ============压缩图片 start============
      // config.module
      //     .rule('images') 
      //     .use('image-webpack-loader')
      //     .loader('image-webpack-loader')
      //     .options({ bypassOnDebug: true })
      //     .end();
      // ============压缩图片 end============
      // 移除 prefetch 插件
      config.plugins.delete('prefetch')
      // 移除 preload 插件
      config.plugins.delete('preload');
      config.plugin('provide').use(webpack.ProvidePlugin, [{
          'window.Quill': 'quill'
      }])
  },
  configureWebpack: config => {
          // 代码压缩
          config.plugins.push(
              new UglifyJsPlugin({
                  uglifyOptions: {
                      //生产环境自动删除console
                      compress: {
                          drop_debugger: true,
                          drop_console: true,
                          pure_funcs: ['console.log']
                      },
                      warnings: false, // 若打包错误，则注释这行
                  },
                  sourceMap: false,
                  parallel: true
              })
          )
          // gzip压缩
          const productionGzipExtensions = ['html', 'js', 'css']
          config.plugins.push(
              new CompressionWebpackPlugin({
                  filename: '[path].gz[query]',
                  algorithm: 'gzip',
                  test: new RegExp(
                      '\\.(' + productionGzipExtensions.join('|') + ')$'
                  ),
                  threshold: 10240, // 只有大小大于该值的资源会被处理 10240
                  minRatio: 0.8, // 只有压缩率小于这个值的资源才会被处理
                  deleteOriginalAssets: false // 删除原文件
              })
          )
          // 公共代码抽离
          config.optimization = {
              splitChunks: {
                  cacheGroups: {
                      vendor: {
                          chunks: 'all',
                          test: /node_modules/,
                          name: 'vendor',
                          minChunks: 1,
                          maxInitialRequests: 5,
                          minSize: 0,
                          priority: 100
                      },
                      common: {
                          chunks: 'all',
                          test: /[\\/]src[\\/]js[\\/]/,
                          name: 'common',
                          minChunks: 2,
                          maxInitialRequests: 5,
                          minSize: 0,
                          priority: 60
                      },
                      styles: {
                          name: 'styles',
                          test: /\.(sa|sc|c)ss$/,
                          chunks: 'all',
                          enforce: true
                      },
                      runtimeChunk: {
                          name: 'manifest'
                      }
                  }
              }
          }
      
  },
  },
}