'use strict';
const path = require('path');
const defaultSettings = require('./src/settings.js');
const MomentLocalesPlugin = require('moment-locales-webpack-plugin');
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
function resolve(dir) {
  return path.join(__dirname, dir);
}

const name = defaultSettings.title || 'vue Admin Template'; // 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 port = process.env.port || process.env.npm_config_port || 9528; // 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: path.basename(__dirname),
  assetsDir: 'static',
  // lintOnSave: process.env.NODE_ENV === 'development',
  lintOnSave: false,
  productionSourceMap: false,
  css: { sourceMap: process.env.NODE_ENV === 'development' },
  transpileDependencies: ['query-string', 'split-on-first', 'strict-uri-encode'],
  devServer: {
    port: port,
    open: false,
    overlay: {
      warnings: false,
      errors: true
    },
    before: require('./mock/mock-server.js')
  },
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  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');

    // 忽略/moment/locale下的本地化文件
    config.plugin('moment-locales-webpack-plugin').use(new MomentLocalesPlugin({ localesToKeep: ['zh-cn'] }));

    // set svg-sprite-loader
    // config.module
    //   .rule('svg')
    //   .exclude.add(resolve('src/components/SvgIcon/icons'))
    //   .end();
    // config.module
    //   .rule('icons')
    //   .test(/\.svg$/)
    //   .include.add(resolve('src/components/SvgIcon/icons'))
    //   .end()
    //   .use('svg-sprite-loader')
    //   .loader('svg-sprite-loader')
    //   .options({
    //     symbolId: 'icon-[name]'
    //   })
    //   .end();

    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
                },
                // 'ant-design-vue': {
                //   name: 'chunk-ant-design-vue', // split ant-design-vue 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[\\/]_?ant-design-vue(.*)/ // 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');

          // 使用webpack-bundle-analyzer 生成报表
          config.plugin('analyzer').use(new BundleAnalyzerPlugin({ openAnalyzer: false }));
        }
      );
  }
};