'use strict'

const u = require('universalify').fromPromise
const path = require('path')
const fs = require('../fs')
const mkdir = require('../mkdirs')

async function createFile (file) {
  let stats
  try {
    stats = await fs.stat(file)
  } catch { }
  if (stats && stats.isFile()) return

  const dir = path.dirname(file)

  let dirStats = null
  try {
    dirStats = await fs.stat(dir)
  } catch (err) {
    // if the directory doesn't exist, make it
    if (err.code === 'ENOENT') {
      await mkdir.mkdirs(dir)
      await fs.writeFile(file, '')
      return
    } else {
      throw err
    }
  }

  if (dirStats.isDirectory()) {
    await fs.writeFile(file, '')
  } else {
    // parent is not a directory
    // This is just to cause an internal ENOTDIR error to be thrown
    await fs.readdir(dir)
  }
}

function createFileSync (file) {
  let stats
  try {
    stats = fs.statSync(file)
  } catch { }
  if (stats && stats.isFile()) return

  const dir = path.dirname(file)
  try {
    if (!fs.statSync(dir).isDirectory()) {
      // parent is not a directory
      // This is just to cause an internal ENOTDIR error to be thrown
      fs.readdirSync(dir)
    }
  } catch (err) {
    // If the stat call above failed because the directory doesn't exist, create it
    if (err && err.code === 'ENOENT') mkdir.mkdirsSync(dir)
    else throw err
  }

  fs.writeFileSync(file, '')
}

module.exports = {
  createFile: u(createFile),
  createFileSync
}