import fs from 'node:fs/promises'
import os from 'node:os'
import path from 'node:path'

export async function pathIsEmpty(dir: string): Promise<boolean> {
  try {
    const content = await fs.readdir(absolutify(dir))
    return content.length === 0
  } catch (err) {
    if (err.code === 'ENOENT') {
      return true
    }

    throw err
  }
}

export function expandHome(filePath: string): string {
  if (
    filePath.charCodeAt(0) === 126
    /* ~ */
  ) {
    if (
      filePath.charCodeAt(1) === 43
      /* + */
    ) {
      return path.join(process.cwd(), filePath.slice(2))
    }

    const home = os.homedir()
    return home ? path.join(home, filePath.slice(1)) : filePath
  }

  return filePath
}

export function absolutify(dir: string): string {
  const pathName = expandHome(dir)
  return path.isAbsolute(pathName) ? pathName : path.resolve(process.cwd(), pathName)
}