import * as path from 'path'

export const createIndexTsFileContent = ({
  fileNames,
  folderNames,
  stripFileExts = ['js', 'ts'],
}: {
  fileNames: string[]
  folderNames: string[]
  stripFileExts?: string[]
}): string => {
  const transformedFileName = fileNames.map(fileName => {
    const parseFileName = path.parse(fileName)
    const transformedFileExt = parseFileName.ext.substr(1, parseFileName.ext.length - 1)

    if (stripFileExts.includes(transformedFileExt)) {
      return parseFileName.name
    }
    return fileName
  })

  const names = [...transformedFileName, ...folderNames]
  const fileContent = names.reduce((fileContent, name, index) => {
    fileContent += `export * from './${name}'`
    if (index < names.length - 1) {
      fileContent += '\n'
    }

    return fileContent
  }, '')

  return fileContent
}