import * as fs from 'fs'
import * as fsp from 'fs/promises'
import * as path from 'path'

export const createOutDir = async (outDir: string) => {
  const dir = outDir

  if (fs.existsSync(dir)) await fsp.rm(dir, { force: true, recursive: true })

  const _clean = async () => {
    const exists = fs.existsSync(dir)

    if (exists) {
      await fsp.rm(dir, { force: true, recursive: true })
    }
  }

  const _init = async () => {
    await _clean()

    await fsp.mkdir(dir, { recursive: true })
  }

  const _writeFile = async (filename: string, content: string) => {
    if (!filename.startsWith(dir)) filename = path.join(dir, filename)

    const dirname = path.dirname(filename)

    if (!fs.existsSync(dirname)) {
      await fsp.mkdir(dirname, { recursive: true })
    }

    await fsp.writeFile(filename, Buffer.from(content))

    return filename
  }

  return {
    dir,
    init: _init,
    clean: _clean,
    write: _writeFile,
  }
}