const {basename, dirname, extname, join} = require('path');

const airbnbBase = require('@neutrinojs/airbnb-base');
const glob = require('glob');
const mocha = require('@neutrinojs/mocha');
const react = require('@neutrinojs/react');
const nodeExternals = require('webpack-node-externals');

module.exports = {
  options: {},
  use: [
    airbnbBase({
      eslint: {
        cache: false,
        baseConfig: require(`${__dirname}/.eslint.defaults`),
      },
    }),
    (neutrino) => {
      const {files = [], name} = neutrino.options.packageJson;
      files
        .filter((file) => {
          const {source} = neutrino.options;
          try {
            require.resolve(`${source}/${file}`);
            return true;
          }
          catch (error) {
            const ext = extname(file);
            try {
              require.resolve(`${source}/${dirname(file)}/${basename(file, ext)}/index${ext}`);
              return true;
            }
            catch (error) {
              return false;
            }
          }
        })
        .forEach((file) => {
          const isIndex = 'index.js' === file;
          const trimmed = join(dirname(file), basename(file, extname(file)));
          neutrino.options.mains[trimmed] = {entry: isIndex ? file : `./src/${trimmed}`};
        });
      const testPaths = glob.sync('./test/*.js');
      if (testPaths.length > 0) {
        const testEntry = neutrino.config.entry('test').clear();
        testPaths.forEach((path) => testEntry.add(path));
      }
      neutrino.options.output = '.';
      react({
        clean: false,
      })(neutrino);
      Object.keys(neutrino.options.mains).forEach((main) => {
        neutrino.config.plugins.delete(`html-${main}`);
      });
      neutrino.config
        .devtool('source-map')
        .target('node')
        .optimization
          .splitChunks(false)
          .runtimeChunk(false)
        .end()
        .output
          .filename('[name].js')
          .library(name)
          .libraryTarget('umd')
          .umdNamedDefine(true)
        .end()
        .node
          .set('__dirname', false)
          .set('__filename', false);
      const options = neutrino.config.module
        .rule('compile')
        .use('babel')
        .get('options');
      options.presets[0][1].targets = {esmodules: true};
      neutrino.config.externals(nodeExternals({importType: 'umd'}));
    },
    mocha(),
  ],
};