const path = require('path')
const webpack = require('webpack')
const ThemeColorReplacer = require('webpack-theme-color-replacer')
const { getThemeColors, modifyVars } = require('./src/utils/themeUtil')
const { resolveCss } = require('./src/utils/theme-color-replacer-extend')
const CompressionWebpackPlugin = require('compression-webpack-plugin')

const productionGzipExtensions = ['js', 'css']
const isProd = process.env.NODE_ENV === 'production'

const port = process.env.port || process.env.npm_config_port || 9527 // dev port

module.exports = {
  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: {
      '/api': {
        target: process.env.VUE_APP_CLOUD_ENABLE === 'true' ? 'http://localhost:15000' : 'http://localhost:8080',
        changeOrigin: true,
        pathRewrite: {
          '^/api': '/'
        }
      }
    }
  },
  pluginOptions: {
    'style-resources-loader': {
      preProcessor: 'less',
      patterns: [path.resolve(__dirname, './src/theme/theme.less')]
    }
  },
  configureWebpack: config => {
    config.entry.app = ['babel-polyfill', 'whatwg-fetch', './src/main.js']
    config.performance = {
      hints: false
    }
    config.plugins.push(
      new ThemeColorReplacer({
        fileName: 'css/theme-colors-[contenthash:8].css',
        matchColors: getThemeColors(),
        injectCss: true,
        resolveCss
      })
    )
    // Ignore all locale files of moment.js
    config.plugins.push(new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/))
    // 生产环境下将资源压缩成gzip格式
    if (isProd) {
      // add `CompressionWebpack` plugin to webpack plugins
      config.plugins.push(new CompressionWebpackPlugin({
        algorithm: 'gzip',
        test: new RegExp('\\.(' + productionGzipExtensions.join('|') + ')$'),
        threshold: 10240,
        minRatio: 0.8
      }))
    }

    config.externals = {
      TMap: 'TMap'
    }
  },
  chainWebpack: config => {
    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(path.resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(path.resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()
      .use('svgo-loader').loader('svgo-loader')
      .tap(options => ({ ...options, plugins: [
        {
          name: 'removeAttrs',
          params: {
            attrs: 'fill'
          }
        }
      ] })).end()
    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'all' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-VXETable', // 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: /[\\/]vxe-table[\\/]/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: path.resolve(__dirname, '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')
        }
      )
    // 生产环境下关闭css压缩的 colormin 项，因为此项优化与主题色替换功能冲突
    if (isProd) {
      config.plugin('optimize-css')
        .tap(args => {
          args[0].cssnanoOptions.preset[1].colormin = false
          return args
        })
    }
  },
  css: {
    loaderOptions: {
      less: {
        lessOptions: {
          modifyVars: modifyVars(),
          javascriptEnabled: true
        }
      }
    }
  },
  publicPath: process.env.VUE_APP_PUBLIC_PATH,
  outputDir: 'dist',
  assetsDir: 'static',
  productionSourceMap: false
}