'use strict'
const path = require('path')
const defaultSettings = require('./src/assets/js/utils/settings.js')
const CompressionPlugin = require('compression-webpack-plugin')

function resolve(dir) {
  return path.join(__dirname, dir)
}
const name = defaultSettings.title || 'basic-pc' // 页面标题
const port = process.env.port || process.env.npm_config_port || 7006 // 开发端口

module.exports = {
  runtimeCompiler: true,

  // 设置打包资源的基础路径
  publicPath: '.',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  devServer: {
    port: port,
    host: '0.0.0.0',
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      '/backmanage': {
        target: process.env.VUE_APP_ADMIN,
        changeOrigin: true,
        pathRewrite: {
          '^/backmanage': '/'
        }
      }
    }
  },

  configureWebpack: {
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    },
    plugins: [
      new CompressionPlugin({
        filename: '[path][base].gz',
        algorithm: 'gzip',
        test: /\.(js|css|html|svg)$/,
        threshold: 10240,
        minRatio: 0.8
      })
    ]
  },
  chainWebpack(config) {
    config.plugins.delete('preload')
    config.plugins.delete('prefetch')

    // SVG Sprite Loader 配置
    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]'
      })

    // Vue preserveWhitespace 设置
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })

    // Source Map 设置（开发环境）
    config.when(process.env.NODE_ENV === 'development', config => config.devtool('cheap-source-map'))

    // 生产环境优化
    config.when(process.env.NODE_ENV !== 'development', config => {
      config
        .plugin('ScriptExtHtmlWebpackPlugin')
        .after('html')
        .use('script-ext-html-webpack-plugin', [
          {
            inline: /runtime\..*\.js$/
          }
        ])

      // 分包策略
      config.optimization.splitChunks({
        chunks: 'all',
        minSize: 3000,
        maxSize: 6000,
        maxInitialRequests: 3,
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial'
          },
          elementUI: {
            name: 'chunk-elementUI',
            priority: 20,
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/
          },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'),
            minChunks: 3,
            priority: 5,
            reuseExistingChunk: true
          }
        }
      })
      config.optimization.runtimeChunk('single')
    })

    // 添加时间戳到文件名中
    config.output.filename(`js/[name].[hash:8].js`).chunkFilename(`js/[name].[hash:8].js`)
  }
}