/* eslint-disable @typescript-eslint/no-var-requires */
/* eslint-env node */

require('@babel/register')({
  extensions: ['.es6', '.es', '.jsx', '.js', '.mjs', '.ts', '.tsx'],
});

const path = require('path');
const webpack = require('webpack');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const SitemapPlugin = require('sitemap-webpack-plugin').default;
const CSPPlugin = require('csp-webpack-plugin');
const WebpackBar = require('webpackbar');
const SpeedMeasurePlugin = require('speed-measure-webpack-plugin');
const EagerImportsPlugin = require('eager-imports-webpack-plugin').default;
const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer');
const config = require('./config');
const SUPPORTED_LANGUAGES = Object.keys(require('app/i18n'));
const localeFlags = require('app/components/i18n/localeFlags').default;
const rootPath = path.resolve('./packages');
const outputPath = path.join(__dirname, 'build');

const isProduction = process.env.NODE_ENV === 'production';
const isAnalyze = process.argv.some(arg => arg === '--analyze');

const isDockerized = !!process.env.DOCKERIZED;
const isStorybook = process.env.APP_ENV === 'storybook';
const isCI = !!process.env.CI;
const isSilent = isCI || process.argv.some(arg => /quiet/.test(arg));
const isCspEnabled = false;
const enableDll = !isProduction && !isStorybook;

process.env.NODE_ENV = isProduction ? 'production' : 'development';

const smp = new SpeedMeasurePlugin();

const webpackConfig = {
  mode: isProduction ? 'production' : 'development',

  cache: true,

  entry: {
    app: path.join(__dirname, 'packages/app'),
  },

  output: {
    path: outputPath,
    publicPath: '/',
    filename: '[name].js?[hash]',
  },

  resolve: {
    modules: [rootPath, 'node_modules'],
    extensions: ['.js', '.jsx', '.json', '.ts', '.tsx'],
    alias: {
      'react-dom': isProduction ? 'react-dom' : '@hot-loader/react-dom',
    },
  },

  devtool: 'cheap-module-source-map',

  stats: {
    hash: false,
    version: false,
    timings: true,
    assets: false,
    chunks: false,
    modules: false,
    reasons: false,
    children: false,
    source: false,
    errors: true,
    errorDetails: true,
    warnings: false,
    publicPath: false,
  },

  plugins: [
    new WebpackBar(),
    new webpack.DefinePlugin({
      'window.SENTRY_DSN': config.sentryDSN
        ? JSON.stringify(config.sentryDSN)
        : undefined,
      'window.GA_ID':
        config.ga && config.ga.id ? JSON.stringify(config.ga.id) : undefined,
    }),
    new webpack.EnvironmentPlugin({
      NODE_ENV: process.env.NODE_ENV,
      __VERSION__: config.version || '',
    }),
    new HtmlWebpackPlugin({
      template: 'packages/app/index.ejs',
      favicon: 'packages/app/favicon.ico',
      scripts: enableDll ? ['/dll/vendor.dll.js'] : [],
      hash: false, // webpack does this for all our assets automagically
      filename: 'index.html',
      inject: false,
      minify: {
        collapseWhitespace: isProduction,
      },
      isCspEnabled,
    }),
    new SitemapPlugin(
      'https://account.ely.by',
      [
        '/',
        '/register',
        '/resend-activation',
        '/activation',
        '/forgot-password',
        '/rules',
      ],
      {
        lastMod: true,
        changeFreq: 'weekly',
      },
    ),
    // restrict webpack import context, to create chunks only for supported locales
    // @see services/i18n/intlPolyfill.js
    new webpack.ContextReplacementPlugin(
      /locale-data/,
      new RegExp(`/(${SUPPORTED_LANGUAGES.join('|')})\\.js$`),
    ),
    // @see components/i18n/localeFlags.js
    new webpack.ContextReplacementPlugin(
      /flag-icon-css\/flags\/4x3/,
      new RegExp(`/(${localeFlags.getCountryList().join('|')})\\.svg`),
    ),
  ],

  module: {
    rules: [
      {
        test: /\.s?css$/,
        use: [
          {
            loader: 'style-loader',
            options: {
              // style-loader@1.1.2 is still buggy. It breaks our icon styles
              // (vertical align is broken and styles applied multiple times)
              // so we can not use it and it's new `esModule` options
              // esModule: true,
            },
          },
          {
            loader: 'css-loader',
            options: {
              modules: {
                localIdentName: isProduction
                  ? '[hash:base64:5]'
                  : '[path][name]-[local]',
              },
              esModule: true,
              importLoaders: 2,
              sourceMap: !isProduction,
            },
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: !isProduction,
            },
          },
          {
            loader: 'postcss-loader',
            options: {
              ident: 'postcss',
              sourceMap: !isProduction,
              config: { path: __dirname },
            },
          },
        ],
      },
      {
        test: /\.[tj]sx?$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              envName: 'webpack',
              cacheDirectory: true,
            },
          },
        ],
      },
      {
        test: /\.(png|gif|jpg|svg)$/,
        loader: 'file-loader',
        query: {
          name: 'assets/[name].[ext]?[hash]',
        },
      },
      {
        test: /\.(woff|woff2|ttf)$/,
        loader: 'file-loader',
        query: {
          name: 'assets/fonts/[name].[ext]?[hash]',
        },
      },
      {
        test: /\.html$/,
        loader: 'html-loader',
      },
      {
        test: /\.intl\.json$/,
        type: 'javascript/auto',
        use: ['babel-loader', 'intl-loader'],
      },
      {
        // this is consumed by postcss-import
        // @see postcss.config.js
        test: /\.font\.(js|json)$/,
        type: 'javascript/auto',
        use: ['fontgen-loader'],
      },
    ],
  },

  resolveLoader: {
    alias: {
      'intl-loader': path.resolve('./packages/webpack-utils/intl-loader'),
      'fontgen-loader': path.resolve('./packages/webpack-utils/fontgen-loader'),
    },
  },
};

if (isAnalyze) {
  webpackConfig.plugins.push(new BundleAnalyzerPlugin());
}

if (isProduction) {
  let cssExtractApplied = false;

  webpackConfig.module.rules.forEach(rule => {
    if (
      rule.use &&
      (rule.use[0] === 'style-loader' || rule.use[0].loader === 'style-loader')
    ) {
      // replace `style-loader` with `MiniCssExtractPlugin`
      rule.use[0] = MiniCssExtractPlugin.loader;
      cssExtractApplied = true;
    }
  });

  if (!cssExtractApplied) {
    throw new Error(
      'Can not locate style-loader to replace it with mini-css-extract-plugin loader',
    );
  }

  webpackConfig.plugins.push(
    new MiniCssExtractPlugin({
      filename: '[name].css?[hash]',
      chunkFilename: '[id].css?[hash]',
    }),
  );

  webpackConfig.devtool = 'hidden-source-map';

  webpackConfig.optimization = {
    moduleIds: 'hashed',
    runtimeChunk: 'single',
    splitChunks: {
      cacheGroups: {
        vendor: {
          test: m =>
            String(m.context).includes('node_modules') &&
            // icons and intl with relateed polyfills are allowed
            // to be splitted to other chunks
            !/\/(flag-icon-css|intl|@formatjs)\//.test(String(m.context)),
          name: 'vendors',
          chunks: 'all',
        },
      },
    },
  };
} else {
  webpackConfig.plugins.push(
    // force webpack to use mode: eager chunk imports in dev mode
    // this will improve build performance
    // this mode will be default for dev builds in webpack 5
    new EagerImportsPlugin(),
  );

  if (enableDll) {
    webpackConfig.plugins.push(
      new webpack.DllReferencePlugin({
        context: __dirname,
        manifest: require('./dll/vendor.json'),
      }),
    );
  }

  webpackConfig.devServer = {
    host: 'localhost',
    port: 8080,
    proxy: config.apiHost && {
      '/api': {
        target: config.apiHost,
        changeOrigin: true, // add host http-header, based on target
        secure: false, // allow self-signed certs
      },
    },
    hot: true,
    inline: true,
    historyApiFallback: true,
  };
}

if (isCspEnabled) {
  webpackConfig.plugins.push(
    new CSPPlugin({
      'default-src': "'none'",
      'style-src': ["'self'", "'unsafe-inline'"],
      'script-src': [
        "'self'",
        "'nonce-edge-must-die'",
        "'unsafe-inline'",
        'https://www.google-analytics.com',
        'https://recaptcha.net/recaptcha/',
        'https://www.gstatic.com/recaptcha/',
        'https://www.gstatic.cn/recaptcha/',
      ],
      'img-src': ["'self'", 'data:', 'www.google-analytics.com'],
      'font-src': ["'self'", 'data:'],
      'connect-src': ["'self'", 'https://sentry.ely.by'].concat(
        isProduction ? [] : ['ws://localhost:8080'],
      ),
      'frame-src': [
        'https://www.google.com/recaptcha/',
        'https://recaptcha.net/recaptcha/',
      ],
      'report-uri':
        'https://sentry.ely.by/api/2/csp-report/?sentry_key=088e7718236a4f91937a81fb319a93f6',
    }),
  );
}

if (isDockerized) {
  webpackConfig.watchOptions = {
    poll: 2000,
  };
  webpackConfig.devServer.host = '0.0.0.0';
}

if (isSilent) {
  webpackConfig.stats = {
    hash: false,
    version: false,
    timings: true,
    assets: false,
    chunks: false,
    modules: false,
    reasons: false,
    children: false,
    source: false,
    errors: true,
    errorDetails: true,
    warnings: false,
    publicPath: false,
  };
}

module.exports = smp.wrap(webpackConfig);