const path = require('path');
const CSSSplitWebpackPlugin = require('css-split-webpack-plugin').default;

function pickerGenerator(module) {
  const tester = new RegExp(`^docs/${module}`);
  return (markdownData) => {
    const filename = markdownData.meta.filename;
    if (tester.test(filename) &&
        !/\/demo$/.test(path.dirname(filename))) {
      return {
        meta: markdownData.meta,
      };
    }
  };
}

module.exports = {
  port: 8001,
  source: [
    './components',
    './docs',
    'CHANGELOG.zh-CN.md', // TODO: fix it in bisheng
    'CHANGELOG.en-US.md',
  ],
  lazyLoad(nodePath, nodeValue) {
    if (typeof nodeValue === 'string') {
      return true;
    }
    return nodePath.endsWith('/demo');
  },
  pick: {
    components(markdownData) {
      const filename = markdownData.meta.filename;
      if (!/^components/.test(filename) ||
          /\/demo$/.test(path.dirname(filename))) return;

      return {
        meta: markdownData.meta,
      };
    },
    changelog(markdownData) {
      if (/CHANGELOG/.test(markdownData.meta.filename)) {
        return {
          meta: markdownData.meta,
        };
      }
    },
    'docs/pattern': pickerGenerator('pattern'),
    'docs/practice': pickerGenerator('practice'),
    'docs/react': pickerGenerator('react'),
    'docs/resource': pickerGenerator('resource'),
    'docs/spec': pickerGenerator('spec'),
  },
  theme: './site/theme',
  htmlTemplate: './site/theme/static/template.html',
  plugins: [
    'bisheng-plugin-description',
    'bisheng-plugin-toc?maxDepth=2&keepElem',
    'bisheng-plugin-react?lang=__react',
    'bisheng-plugin-antd',
  ],
  filePathMapper(filePath) {
    if (filePath === '/index.html') {
      return ['/index.html', '/index-cn.html'];
    }
    if (filePath.endsWith('/index.html')) {
      return [filePath, filePath.replace(/\/index\.html$/, '-cn/index.html')];
    }
    if (filePath !== '/404.html' && filePath !== '/index-cn.html') {
      return [filePath, filePath.replace(/\.html$/, '-cn.html')];
    }
    return filePath;
  },
  doraConfig: {
    verbose: true,
    plugins: ['dora-plugin-upload'],
  },
  webpackConfig(config) {
    config.resolve.alias = {
      'antd/lib': path.join(process.cwd(), 'components'),
      antd: process.cwd(),
      site: path.join(process.cwd(), 'site'),
      'react-router': 'react-router/umd/ReactRouter',
    };
    config.plugins.push(new CSSSplitWebpackPlugin({ preserve: true }));

    config.babel.plugins.push([
      require.resolve('babel-plugin-transform-runtime'),
      {
        polyfill: false,
        regenerator: true,
      },
    ]);

    config.babel.plugins.push([
      require.resolve('babel-plugin-import'),
      {
        style: true,
        libraryName: 'antd',
        libraryDirectory: 'components',
      },
    ]);

    return config;
  },
};