const fs = require('fs')
const util = require('util')
const path = require('path')

const projectRoot = path.join(__dirname, '..')
const cacheDir = path.join(projectRoot, 'cache')
const dataDir = path.join(projectRoot, 'data')

const readFile = util.promisify(fs.readFile)
const writeFile = util.promisify(fs.writeFile)
const mkdir = util.promisify(fs.mkdir)

async function mkdirAndWriteFile(filepath, data) {
  try {
    // create directory
    await mkdir(path.dirname(filepath))
  } catch (err) {
    // ignore "directory exists errors"
    if (err.code !== 'EEXIST') throw err
  }
  return writeFile(filepath, data)
}

module.exports = {
  projectRoot,
  cacheDir,
  dataDir,
  readFile,
  writeFile,
  mkdirAndWriteFile
}