const MOBILE_UA_RE = /android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini|mobile/i
const IOS_UA_RE = /iphone|ipad|ipod|ios/i
const WECHAT_UA_RE = /micromessenger/i

export function resolveClientDevice(input = {}) {
  const host = String(input.host || '').split(':')[0].toLowerCase()
  const userAgent = String(input.userAgent || '')
  const isMobileHost = host === 'm.aionline.cc' || host.startsWith('m.')
  const isMobile = isMobileHost || MOBILE_UA_RE.test(userAgent)

  return {
    client: isMobile ? 2 : 1,
    isMobile,
    isIos: IOS_UA_RE.test(userAgent),
    isWechat: WECHAT_UA_RE.test(userAgent),
    host,
    userAgent,
  }
}

export function useClientDevice() {
  function getHost() {
    if (import.meta.client) return window.location.hostname || ''
    const headers = useRequestHeaders(['host'])
    return headers.host || ''
  }

  function getUserAgent() {
    if (import.meta.client) return navigator.userAgent || ''
    const headers = useRequestHeaders(['user-agent'])
    return headers['user-agent'] || ''
  }

  function getMeta() {
    return resolveClientDevice({
      host: getHost(),
      userAgent: getUserAgent(),
    })
  }

  const device = computed(() => getMeta())
  const clientId = computed(() => device.value.client)
  const isMobileClient = computed(() => device.value.isMobile)
  const isIosClient = computed(() => device.value.isIos)
  const isWechatClient = computed(() => device.value.isWechat)

  return {
    device,
    clientId,
    isMobileClient,
    isIosClient,
    isWechatClient,
    getClientId: () => getMeta().client,
    getClientIos: () => (getMeta().isIos ? 1 : 0),
    getClientMeta: getMeta,
  }
}