const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const path = require('path');

const appDirectory = path.resolve(__dirname);

module.exports = {
  mode: process.env.NODE_ENV || 'production',
  context: __dirname,
  entry: [
    // polyfill non-standard APIs
    './src/polyfills',
    // app entry file
    './src'
  ],
  output: {
    path: path.resolve(appDirectory, 'dist'),
    filename: 'bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.(gif|jpe?g|png|svg)$/,
        use: {
          loader: 'file-loader'
        }
      },
      {
        test: /\.js$/,
        include: [
          // anything that needs to be compiled to ES5
          path.resolve(appDirectory, 'src')
        ],
        use: {
          loader: 'babel-loader',
          options: {
            cacheDirectory: false,
            presets: ['react-native'],
            plugins: [
              // needed to support async/await
              'transform-runtime'
            ]
          }
        }
      }
    ]
  },
  plugins: [
    new BundleAnalyzerPlugin({
      analyzerMode: 'static',
      openAnalyzer: false
    })
  ],
  resolve: {
    alias: Object.assign(
      {
        // use commonjs modules due to mock haste resolver aliases
        'react-native$': 'react-native-web/dist/cjs'
      },

      {
        // temporary hack to work around image loading
        './flux.png': './flux@3x.png',
        '../relay.png': '../relay@3x.png',
        './uie_comment_highlighted.png': './uie_comment_highlighted@2x.png',
        './uie_comment_normal.png': './uie_comment_normal@2x.png',
        './uie_thumb_normal.png': './uie_thumb_normal@2x.png',
        './uie_thumb_selected.png': './uie_thumb_selected@2x.png'
      },

      // mock haste resolver
      [
        'ActivityIndicator',
        'Alert',
        'AsyncStorage',
        'Button',
        'DeviceInfo',
        'Modal',
        'NativeModules',
        'Platform',
        'SafeAreaView',
        'SectionList',
        'StyleSheet',
        'Switch',
        'Text',
        'TextInput',
        'TouchableHighlight',
        'TouchableWithoutFeedback',
        'View',
        'ViewPropTypes'
      ].reduce(
        (acc, curr) => {
          acc[curr] = `react-native-web/dist/cjs/exports/${curr}`;
          return acc;
        },
        {
          JSEventLoopWatchdog: 'react-native-web/dist/cjs/vendor/react-native/JSEventLoopWatchdog',
          React$: 'react',
          ReactNative$: 'react-native-web/dist/cjs',
          AnExSet: path.resolve(__dirname, './src/RNTester/AnimatedGratuitousApp/AnExSet'),
          RNTesterBlock: path.resolve(__dirname, './src/RNTester/RNTesterBlock'),
          RNTesterPage: path.resolve(__dirname, './src/RNTester/RNTesterPage'),
          RNTesterSettingSwitchRow: path.resolve(
            __dirname,
            './src/RNTester/RNTesterSettingSwitchRow'
          ),
          infoLog$: 'react-native-web/dist/cjs/vendor/react-native/infoLog',
          nativeImageSource$: path.resolve(__dirname, './src/nativeImageSource')
        }
      )
    ),
    extensions: ['.web.js', '.js', '.json']
  }
};