const path = require('path');
const glob = require('glob');

const PurifyCSSPlugin = require('purifycss-webpack');

module.exports = {
  assetsDir: 'assets',
  productionSourceMap: false,
  configureWebpack: {
    optimization: {
      splitChunks: {
        cacheGroups: {
          // We want to keep the vendors chunk, but we don't want to include moment since it's relatively large
          // and only used for the screenshots page (which is never served to the client).
          // An alternative method would be to set minChunks to 2 here.
          vendors: {
            test: /[\\/]node_modules[\\/](?!(moment|moment-timezone)[\\/])/
          },
          // The common chunk doesn't really make sense here since the only reason we're splitting
          // pages is for the server-side screenshots page. Disabling it to save an HTTP request.
          common: false
        }
      }
    },
    plugins: [
      new PurifyCSSPlugin({
        paths: [
            ...glob.sync(path.join(__dirname, 'src/web/html/**/*.html')),
            ...glob.sync(path.join(__dirname, 'src/web/components/**/*.vue')),
        ],
        purifyOptions: {
          whitelist: [
            '.title:not(.is-spaced)+.subtitle', // Fix subtitle spacing
            // Dynamic merchandise types
            '.merchandise-box.shoes',
            '.merchandise-box.head',
            '.merchandise-box.clothes',
          ],
          cleanCssOptions: {
            rebase: false, // Leave relative paths alone when minifying CSS
          },
        },
      }),
    ]
  },
  chainWebpack: config => {
    config.plugin('prefetch-index').tap(options => {
      options[0].fileBlacklist = options[0].fileBlacklist || [];
      options[0].fileBlacklist.push(/lang-.+?\.js$/);
      return options;
    });
  },
  devServer: {
    contentBase: [
      './public',
      './dist'
    ]
  },
  pages: {
    index: {
      entry: 'src/web/main.js'
    },
    screenshots: {
      entry: 'src/web/screenshots.js'
    }
  }
}