'use strict';

const path = require('path');

const fs = require('fs');

const getPublicUrlOrPath = require('react-dev-utils/getPublicUrlOrPath');

// Make sure any symlinks in the project folder are resolved:

// https://github.com/facebook/create-react-app/issues/637

const appDirectory = fs.realpathSync(process.cwd());

const resolveApp = relativePath => path.resolve(appDirectory, relativePath);

// We use `PUBLIC_URL` environment variable or "homepage" field to infer

// "public path" at which the app is served.

// webpack needs to know it to put the right <script> hrefs into HTML even in

// single-page apps that may serve index.html for nested URLs like /todos/42.

// We can't use a relative path in HTML because we don't want to load something

// like /todos/42/static/js/bundle.7289d.js. We have to know the root.

const publicUrlOrPath = getPublicUrlOrPath(

  process.env.NODE_ENV === 'development',

  require(resolveApp('package.json')).homepage,

  process.env.PUBLIC_URL

);

const buildPath = process.env.BUILD_PATH || 'build';

const moduleFileExtensions = [

  'web.mjs',

  'mjs',

  'web.js',

  'js',

  'web.ts',

  'ts',

  'web.tsx',

  'tsx',

  'json',

  'web.jsx',

  'jsx',

];

// Resolve file paths in the same order as webpack

const resolveModule = (resolveFn, filePath) => {

  const extension = moduleFileExtensions.find(extension =>

    fs.existsSync(resolveFn(`${filePath}.${extension}`))

  );

  if (extension) {

    return resolveFn(`${filePath}.${extension}`);

  }

  return resolveFn(`${filePath}.js`);

};

// config after eject: we're in ./config/

module.exports = {

  dotenv: resolveApp('.env'),

  appPath: resolveApp('.'),

  appBuild: resolveApp(buildPath),

  appPublic: resolveApp('public'),

  appIndexJs: resolveModule(resolveApp, 'src/index'),

  appPackageJson: resolveApp('package.json'),

  appSrc: resolveApp('src'),

  appTsConfig: resolveApp('tsconfig.json'),

  appJsConfig: resolveApp('jsconfig.json'),

  yarnLockFile: resolveApp('yarn.lock'),

  testsSetup: resolveModule(resolveApp, 'src/setupTests'),

  appNodeModules: resolveApp('node_modules'),

  appWebpackCache: resolveApp('node_modules/.cache'),

  appTsBuildInfoFile: resolveApp('node_modules/.cache/tsconfig.tsbuildinfo'),

  swSrc: resolveModule(resolveApp, 'src/service-worker'),

  publicUrlOrPath,

};

module.exports.moduleFileExtensions = moduleFileExtensions;