import fs from 'fs'
import path from 'path'

const appDirectory = fs.realpathSync(process.cwd())
const resolveApp = (relativePath: string) =>
  path.resolve(appDirectory, relativePath)

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

export const moduleFileExtensions = ['mjs', 'js', 'ts', 'tsx', 'json', 'jsx']

const resolveModule = (resolveFn: Function, filePath: string) => {
  const extension = moduleFileExtensions.find((extension) =>
    fs.existsSync(resolveFn(`${filePath}.${extension}`))
  )

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

  return resolveFn(`${filePath}.js`)
}
const paths = {
  dotenv: resolveApp('.env'),
  appPath: resolveApp('.'),
  appBuild: resolveApp(buildPath),
  appPublic: resolveApp('public'),
  appHtml: resolveApp('public/index.html'),
  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'),
  proxySetup: resolveApp('src/setupProxy.js'),
  appNodeModules: resolveApp('node_modules'),
  swSrc: resolveModule(resolveApp, 'src/service-worker'),
  publicUrlOrPath: '',
  dll: resolveApp('dll'),
  moduleFileExtensions,
}

export default paths