export function resetContainerHeight(dom) {
  const originalHeight = document.body.clientHeight || document.documentElement.clientHeight

  window.onresize = function () {
    const resizeHeight = document.documentElement.clientHeight || document.body.clientHeight
    if (resizeHeight < originalHeight) {
      // 恢复内容区域高度
      const container = document.querySelector(dom)
      container.style.height = originalHeight
    }
  }
}

export function resetInputBlur() {
  const isWechat = window.navigator.userAgent.match(/MicroMessenger\/([\d.]+)/i)
  if (!isWechat)
    return
  const wechatVersion = isWechat[1]
  const version = navigator.appVersion.match(/OS (\d+)_(\d+)_?(\d+)?/)

  // 如果设备类型为iOS 12+ 和wechat 6.7.4+，恢复成原来的视口
  if (+wechatVersion.replace(/\./g, '') >= 674 && +version[1] >= 12) {
    window.scrollTo(0, Math.max(document.body.clientHeight, document.documentElement.clientHeight))
  }
}

export function getQueryString(name) {
  const reg = new RegExp(`(^|&)${name}=([^&]*)(&|$)`, 'i')
  const r = window.location.search.substr(1).match(reg)
  if (r != null) {
    return decodeURIComponent(r[2])
  }
  return null
}

export function simpleRequest(options) {
  const xhr = new XMLHttpRequest()
  xhr.timeout = 3000
  if (options.type === 'GET') {
    xhr.open(options.type, options.url, options.async || true)
    xhr.send(null)
  }
  else if (options.type === 'POST') {
    xhr.open(options.type, options.url, options.async || true)
    xhr.setRequestHeader('Content-Type', 'application/json')
    xhr.send(JSON.stringify(options.data || {}))
  }
  xhr.onreadystatechange = function () {
    if (xhr.readyState === 4) {
      if (xhr.status >= 200 && xhr.status < 300) {
        options.successed(xhr.responseText)
      }
      else {
        options.failed && options.failed(xhr)
      }
    }
  }
  xhr.ontimeout = function () {
    options.failed && options.failed(xhr)
  }
}