export const ensureArray = (input: any) => (input ? (Array.isArray(input) ? input : [input]) : [])

export const delay = (t: number) => {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve()
    }, t)
  })
}

export const joinPaths = (...paths: string[]) => {
  return paths.reduce((finalPath, path, idx) => {
    if (idx === 0) {
      return path
    }
    if (path.startsWith('/')) {
      return path
    }
    if (finalPath.endsWith('/')) {
      return finalPath + path
    }
    return finalPath + '/' + path
  }, '')
}

export const reverse = <T>(arr: T[]) => {
  const copy = [...arr]
  return copy.reverse()
}

// http://flyingsky.github.io/2018/01/26/javascript-detect-chinese-japanese/
const REGEX_CHINESE = /[\u4e00-\u9fff]|[\u3400-\u4dbf]|[\u{20000}-\u{2a6df}]|[\u{2a700}-\u{2b73f}]|[\u{2b740}-\u{2b81f}]|[\u{2b820}-\u{2ceaf}]|[\uf900-\ufaff]|[\u3300-\u33ff]|[\ufe30-\ufe4f]|[\uf900-\ufaff]|[\u{2f800}-\u{2fa1f}]/u
export const hasChineseChar = (str) => REGEX_CHINESE.test(str)

export function isValidIP(str: string) {
  const octet = '(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]?|0)'
  const regex = new RegExp(`^${octet}\\.${octet}\\.${octet}\\.${octet}$`)
  return regex.test(str)
}

// TODO .com.cn 这类域名会有问题
export const getRootDomain = (hostname: string) =>
  isValidIP(hostname)
    ? hostname
    : hostname
        .split('.')
        .slice(-2)
        .join('.')

// https://stackoverflow.com/questions/46155/how-to-validate-an-email-address-in-javascript
export function isEmail(email: string) {
  const re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
  return re.test(email)
}

export const isThenable = (obj: any) => {
  try {
    return typeof obj.then === 'function'
  } catch (error) {
    return false
  }
}

export * from './color'
export * from './diff'
export * from './object-id'
export * from './paginate'