/* eslint no-param-reassign: 0 */
// This config is for building dist files
const getWebpackConfig = require('@ant-design/tools/lib/getWebpackConfig');
const IgnoreEmitPlugin = require('ignore-emit-webpack-plugin');
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const darkVars = require('./scripts/dark-vars');
const compactVars = require('./scripts/compact-vars');

const { webpack } = getWebpackConfig;

// noParse still leave `require('./locale' + name)` in dist files
// ignore is better: http://stackoverflow.com/q/25384360
function ignoreMomentLocale(webpackConfig) {
  delete webpackConfig.module.noParse;
  webpackConfig.plugins.push(new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/));
}

function addLocales(webpackConfig) {
  let packageName = 'antd-with-locales';
  if (webpackConfig.entry['antd.min']) {
    packageName += '.min';
  }
  webpackConfig.entry[packageName] = './index-with-locales.js';
  webpackConfig.output.filename = '[name].js';
}

function externalMoment(config) {
  config.externals.moment = {
    root: 'moment',
    commonjs2: 'moment',
    commonjs: 'moment',
    amd: 'moment',
  };
}

function processWebpackThemeConfig(themeConfig, theme, vars) {
  themeConfig.forEach(config => {
    ignoreMomentLocale(config);
    externalMoment(config);

    // rename default entry to ${theme} entry
    Object.keys(config.entry).forEach(entryName => {
      config.entry[entryName.replace('antd', `antd.${theme}`)] = config.entry[entryName];
      delete config.entry[entryName];
    });

    // apply ${theme} less variables
    config.module.rules.forEach(rule => {
      // filter less rule
      if (rule.test instanceof RegExp && rule.test.test('.less')) {
        rule.use[rule.use.length - 1].options.modifyVars = vars;
      }
    });

    const themeReg = new RegExp(`${theme}(.min)?\\.js(\\.map)?$`);
    // ignore emit ${theme} entry js & js.map file
    config.plugins.push(new IgnoreEmitPlugin(themeReg));
  });
}

const webpackConfig = getWebpackConfig(false);
const webpackDarkConfig = getWebpackConfig(false);
const webpackCompactConfig = getWebpackConfig(false);
if (process.env.RUN_ENV === 'PRODUCTION') {
  webpackConfig.forEach(config => {
    ignoreMomentLocale(config);
    externalMoment(config);
    addLocales(config);
    // Reduce non-minified dist files size
    config.optimization.usedExports = true;
    // skip codesandbox ci
    if (!process.env.CSB_REPO) {
      config.plugins.push(
        new BundleAnalyzerPlugin({
          analyzerMode: 'static',
          openAnalyzer: false,
        }),
      );
    }
  });

  processWebpackThemeConfig(webpackDarkConfig, 'dark', darkVars);
  processWebpackThemeConfig(webpackCompactConfig, 'compact', compactVars);
}

module.exports = [...webpackConfig, ...webpackDarkConfig, ...webpackCompactConfig];