'use strict';

process.env.NODE_ENV = 'production';

const autoprefixer = require('autoprefixer');
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const ManifestPlugin = require('webpack-manifest-plugin');
const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
const SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');
const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
// const WriteFilePlugin = require('write-file-webpack-plugin');
const getClientEnvironment = require('./env');
const paths = require('./paths');
// Webpack uses `publicPath` to determine where the app is being served from.
// It requires a trailing slash, or the file assets will get an incorrect path.
// const publicPath = 'http://localhost:3000/';
const publicPath = paths.servedPath;
// Some apps do not use client-side routing with pushState.
// For these, "homepage" can be set to "." to enable relative asset paths.
const shouldUseRelativeAssetPaths = publicPath === './';
// `publicUrl` is just like `publicPath`, but we will provide it to our app
// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
const publicUrl = publicPath.slice(0, -1);
// Get environment variables to inject into our app.
const env = getClientEnvironment(publicUrl);

// Assert this just to be safe.
// Development builds of React are slow and not intended for production.
if (env.stringified['process.env'].NODE_ENV !== '"production"') {
  throw new Error('Production builds must have NODE_ENV=production.');
}

// Note: defined here because it will be used more than once.
const cssFilename = 'static/css/[name].[contenthash:8].css';

// ExtractTextPlugin expects the build output to be flat.
// (See https://github.com/webpack-contrib/extract-text-webpack-plugin/issues/27)
// However, our output is structured with css, js and media folders.
// To have this structure working with relative paths, we have to use custom options.
const extractTextPluginOptions = shouldUseRelativeAssetPaths
  ? // Making sure that the publicPath goes back to to build folder.
    { publicPath: Array(cssFilename.split('/').length).join('../') }
  : {};

module.exports = {
  // Don't attempt to continue if there are any errors.
  bail: true,
    // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
    // See the discussion in https://github.com/facebookincubator/create-react-app/issues/343.
    devtool: 'cheap-module-source-map',
    // These are the "entry points" to our application.
    // This means they will be the "root" imports that are included in JS bundle.
    // The first two entry points enable "hot" CSS and auto-refreshes for JS.
    entry: [
      // Include an alternative client for WebpackDevServer. A client's job is to
      // connect to WebpackDevServer by a socket and get notified about changes.
      // When you save a file, the client will either apply hot updates (in case
      // of CSS changes), or refresh the page (in case of JS changes). When you
      // make a syntax error, this client will display a syntax error overlay.
      // Note: instead of the default WebpackDevServer client, we use a custom one
      // to bring better experience for Create React App users. You can replace
      // the line below with these two lines if you prefer the stock client:
      // require.resolve('webpack-dev-server/client') + '?/',
      // require.resolve('webpack/hot/dev-server'),
      require.resolve('react-dev-utils/webpackHotDevClient'),
      // We ship a few polyfills by default:
      require.resolve('./polyfills'),
      // Errors should be considered fatal in development
      require.resolve('react-error-overlay'),
      // Finally, this is your app's code:
      paths.appIndexJs,
      // We include the app code last so that if there is a runtime error during
      // initialization, it doesn't blow up the WebpackDevServer client, and
      // changing JS code would still trigger a refresh.
    ],
    output: {
      // The build folder.
      path: paths.appBuild,
      // Generated JS file names (with nested folders).
      // There will be one main bundle, and one file per asynchronous chunk.
      // We don't currently advertise code splitting but Webpack supports it.
      filename: 'static/js/[name].[hash].js',
      chunkFilename: 'static/js/[name].[hash].js',
      // We inferred the "public path" (such as / or /my-project) from homepage.
      publicPath: publicPath,
      // Point sourcemap entries to original disk location
      devtoolModuleFilenameTemplate: info =>
        path.relative(paths.appSrc, info.absoluteResourcePath)
    },
    watch:true,
    resolve: {
      // This allows you to set a fallback for where Webpack should look for modules.
      // We placed these paths second because we want `node_modules` to "win"
      // if there are any conflicts. This matches Node resolution mechanism.
      // https://github.com/facebookincubator/create-react-app/issues/253
      modules: ['node_modules', paths.appNodeModules].concat(
      // It is guaranteed to exist because we tweak it in `env.js`
      process.env.NODE_PATH.split(path.delimiter).filter(Boolean)),
      // These are the reasonable defaults supported by the Node ecosystem.
      // We also include JSX as a common component filename extension to support
      // some tools, although we do not recommend using it, see:
      // https://github.com/facebookincubator/create-react-app/issues/290
      extensions: [
        '.ts', '.tsx', '.js', '.json', '.jsx'
      ],
      alias: {

        // Support React Native Web
        // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
        'react-native': 'react-native-web'
      },
      plugins: [// Prevents users from importing files from outside of src/ (or node_modules/).
        // This often causes confusion because we only process files within src/ with babel.
        // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
        // please link the files into your node_modules/ and let module-resolution kick in.
        // Make sure your source files are compiled, as they will not be processed in any way.
        new ModuleScopePlugin(paths.appSrc)]
    },
    module: {
      strictExportPresence: true,
      rules: [
        // TODO: Disable require.ensure as it's not a standard language feature.
        // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
        // { parser: { requireEnsure: false } },

        // First, run the linter.
        // It's important to do this before Babel processes the JS.
        {
          test: /\.(ts|tsx)$/,
          loader: require.resolve('tslint-loader'),
          enforce: 'pre',
          include: paths.appSrc,
          options: {
            typeCheck:true
          }
        }, {
          test: /\.js$/,
          loader: require.resolve('source-map-loader'),
          enforce: 'pre',
          include: paths.appSrc
        },
        // ** ADDING/UPDATING LOADERS **
        // The "file" loader handles all assets unless explicitly excluded.
        // The `exclude` list *must* be updated with every change to loader extensions.
        // When adding a new loader, you must add its `test`
        // as a new entry in the `exclude` list for "file" loader.

        // "file" loader makes sure those assets get served by WebpackDevServer.
        // When you `import` an asset, you get its (virtual) filename.
        // In production, they would get copied to the `build` folder.
        {
          exclude: [
            /\.html$/,
            // We have to write /\.(js|jsx)(\?.*)?$/ rather than just /\.(js|jsx)$/
            // because you might change the hot reloading server from the custom one
            // to Webpack's built-in webpack-dev-server/client?/, which would not
            // get properly excluded by /\.(js|jsx)$/ because of the query string.
            // Webpack 2 fixes this, but for now we include this hack.
            // https://github.com/facebookincubator/create-react-app/issues/1713
            /\.(js|jsx)(\?.*)?$/,
            /\.(ts|tsx)(\?.*)?$/,
            /\.css$/,
            /\.json$/,
            /\.bmp$/,
            /\.gif$/,
            /\.jpe?g$/,
            /\.png$/
          ],
          loader: require.resolve('file-loader'),
          options: {
            name: 'static/media/[name].[hash:8].[ext]'
          }
        },
        // "url" loader works like "file" loader except that it embeds assets
        // smaller than specified limit in bytes as data URLs to avoid requests.
        // A missing `test` is equivalent to a match.
        {
          test: [
            /\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/
          ],
          loader: require.resolve('url-loader'),
          options: {
            limit: 10000,
            name: 'static/media/[name].[hash:8].[ext]'
          }
        },
        // Compile .tsx?
        {
          test: /\.(ts|tsx)$/,
          include: paths.appSrc,
          loader: require.resolve('ts-loader')
        },
        // "postcss" loader applies autoprefixer to our CSS.
        // "css" loader resolves paths in CSS and adds assets as dependencies.
        // "style" loader turns CSS into JS modules that inject <style> tags.
        // In production, we use a plugin to extract that CSS to a file, but
        // in development "style" loader enables hot editing of CSS.
        {
          test: /\.css$/,
          use: [
            require.resolve('style-loader'), {
              loader: require.resolve('css-loader'),
              options: {
                importLoaders: 1
              }
            }, {
              loader: require.resolve('postcss-loader'),
              options: {
                ident: 'postcss', // https://webpack.js.org/guides/migrating/#complex-options
                plugins: () => [
                  require('postcss-flexbugs-fixes'),
                  autoprefixer({
                    browsers: [
                      '>1%', 'last 4 versions', 'Firefox ESR', 'not ie < 9', // React doesn't support IE8 anyway
                    ],
                    flexbox: 'no-2009'
                  })
                ]
              }
            }
          ]
        },
        // ** STOP ** Are you adding a new loader?
        // Remember to add the new extension(s) to the "url" loader exclusion list.
      ]
    },
    plugins: [
      // Makes some environment variables available in index.html.
      // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
      // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
      // In development, this will be an empty string.
      new InterpolateHtmlPlugin(env.raw),
      // Generates an `index.html` file with the <script> injected.
      new HtmlWebpackPlugin({inject: true, template: paths.appHtml}),
      // Makes some environment variables available to the JS code, for example:
      // if (process.env.NODE_ENV === 'development') { ... }. See `./env.js`.
      new webpack.DefinePlugin(env.stringified),
      // This is necessary to emit hot updates (currently CSS only):
      new webpack.HotModuleReplacementPlugin(),
      // Watcher doesn't work well if you mistype casing in a path so we use
      // a plugin that prints an error when you attempt to do this.
      // See https://github.com/facebookincubator/create-react-app/issues/240
      // If you require a missing module and then `npm install` it, you still have
      // to restart the development server for Webpack to discover it. This plugin
      // makes the discovery automatic so you don't have to restart.
      // See https://github.com/facebookincubator/create-react-app/issues/186
      new WatchMissingNodeModulesPlugin(paths.appNodeModules),
      // Moment.js is an extremely popular library that bundles large locale files
      // by default due to how Webpack interprets its code. This is a practical
      // solution that requires the user to opt into importing specific locales.
      // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
      // You can remove this if you don't use Moment.js:
      new ManifestPlugin({
        fileName: 'asset-manifest.json',
      }),
      // new SWPrecacheWebpackPlugin({
      //   // By default, a cache-busting query parameter is appended to requests
      //   // used to populate the caches, to ensure the responses are fresh.
      //   // If a URL is already hashed by Webpack, then there is no concern
      //   // about it being stale, and the cache-busting can be skipped.
      //   dontCacheBustUrlsMatching: /\.\w{8}\./,
      //   filename: 'service-worker.js',
      //   logger(message) {
      //     if (message.indexOf('Total precache size is') === 0) {
      //       // This message occurs for every build and is a bit too noisy.
      //       return;
      //     }
      //     console.log(message);
      //   },
      //   minify: true,
      //   // For unknown URLs, fallback to the index page
      //   navigateFallback: publicUrl + '/index.html',
      //   // Ignores URLs starting from /__ (useful for Firebase):
      //   // https://github.com/facebookincubator/create-react-app/issues/2237#issuecomment-302693219
      //   navigateFallbackWhitelist: [/^(?!\/__).*/],
      //   // Don't precache sourcemaps (they're large) and build asset manifest:
      //   staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/],
      //   // Work around Windows path issue in SWPrecacheWebpackPlugin:
      //   // https://github.com/facebookincubator/create-react-app/issues/2235
      //   stripPrefix: paths.appBuild.replace(/\\/g, '/') + '/',
      // }),
      new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
      // new WriteFilePlugin()
    ],
    // Some libraries import Node modules but don't use them in the browser.
    // Tell Webpack to provide empty mocks for them so importing them works.
    node: {
      fs: 'empty',
      net: 'empty',
      tls: 'empty'
    },
    // Turn off performance hints during development because we don't do any
    // splitting or minification in interest of speed. These warnings become
    // cumbersome.
    performance: {
      hints: false
    }
};