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

function isObject(obj) {
  return obj !== null && typeof obj === 'object'
}

function checkInstalled(target) {
  let ret = true
  try {
    const resolveModule = require(path.resolve(target))
    if (!resolveModule) {
      ret = false
    }
  } catch (e) {
    ret = false
  }
  return ret
}

function exists(path) {
  let ret = true
  try {
    fs.accessSync(path, fs.constants.F_OK)
  } catch (e) {
    ret = false
  }
  return ret
}

function mkdir(path) {
  let ret = true
  try {
    fs.mkdirSync(path)
  } catch (e) {
    ret = false
  }
  return ret
}

function writeFile(path, content) {
  let ret = true
  try {
    fs.writeFileSync(path, content, { encoding: 'utf8' })
  } catch (e) {
    ret = false
  }
  return ret
}

function readFile(path) {
  let ret = ''
  try {
    ret = fs.readFileSync(path, { encoding: 'utf8' })
  } catch (e) {
    ret = ''
  }
  return ret
}

function readEnv(path) {
  let ret = {}
  try {
    ret = dotenv.parse(Buffer.from(readFile(path)))
  } catch (e) {
    console.warn('readEnv error:', e.message)
    ret = {}
  }
  return ret
}

function buildEnvContent(values) {
  let content = ''
  Object.keys(values).forEach(key => {
    content += `${key}=${values[key]}\n`
  })
  return content
}

function sortObject(obj, order = 'asc') {
  const keys = Object.keys(obj)
  const sortedKeys = order === 'asc' ? keys.sort() : keys.reverse()
  return sortedKeys.reduce((val, key) => {
    const v = obj[key]
    if (isObject(v)) {
      val[key] = sortObject(v, order)
    } else if (Array.isArray(v)) {
      val[key] = order === 'asc' ? v.sort() : v.reverse()
    } else {
      val[key] = v
    }
    return val
  }, {})
}

module.exports = {
  isObject,
  checkInstalled,
  exists,
  mkdir,
  writeFile,
  readFile,
  readEnv,
  buildEnvContent,
  sortObject
}