import moment from 'moment'

//默认赋值 当前一周的时间
export function getThisWeekRange(){
  const today = new Date();
  const startOfWeek = new Date(today);
  startOfWeek.setDate(startOfWeek.getDate() - startOfWeek.getDay()); // 减去今天是一周的第几天，得到周一的日期
  const endOfWeek = new Date(startOfWeek);
  endOfWeek.setDate(endOfWeek.getDate() + 6); // 加上6天，得到周日的日期

  //return [moment(startOfWeek,"YYYY-MM-DD HH:mm"), moment(endOfWeek,"YYYY-MM-DD HH:mm")];
  return [moment(startOfWeek), moment(endOfWeek)];
}

export function dateFormat(dateString, fmt) {
    const date = new Date(dateString)
		let ret
		const opt = {
			'Y+': date.getFullYear().toString(), // 年
			'm+': (date.getMonth() + 1).toString(), // 月
			'd+': date.getDate().toString(), // 日
			'H+': date.getHours().toString(), // 时
			'M+': date.getMinutes().toString(), // 分
			'S+': date.getSeconds().toString() // 秒
			// 有其他格式化字符需求可以继续添加，必须转化成字符串
		}
		for (const k in opt) {
			ret = new RegExp('(' + k + ')').exec(fmt)
			if (ret) {
				fmt = fmt.replace(ret[1], (ret[1].length == 1) ? (opt[k]) : (opt[k].padStart(ret[1].length, '0')))
			};
		};
		return fmt
}

export function timeFix () {
  const time = new Date()
  const hour = time.getHours()
  return hour < 9 ? '早上好' : hour <= 11 ? '上午好' : hour <= 13 ? '中午好' : hour < 20 ? '下午好' : '晚上好'
}

export function welcome () {
  const arr = ['休息一会儿吧', '准备吃什么呢?', '要不要打一把 LOL', '我猜你可能累了']
  const index = Math.floor(Math.random() * arr.length)
  return arr[index]
}

/**
 * 触发 window.resize
 */
export function triggerWindowResizeEvent () {
  const event = document.createEvent('HTMLEvents')
  event.initEvent('resize', true, true)
  event.eventType = 'message'
  window.dispatchEvent(event)
}

export function handleScrollHeader (callback) {
  let timer = 0

  let beforeScrollTop = window.pageYOffset
  callback = callback || function () {}
  window.addEventListener(
    'scroll',
    event => {
      clearTimeout(timer)
      timer = setTimeout(() => {
        let direction = 'up'
        const afterScrollTop = window.pageYOffset
        const delta = afterScrollTop - beforeScrollTop
        if (delta === 0) {
          return false
        }
        direction = delta > 0 ? 'down' : 'up'
        callback(direction)
        beforeScrollTop = afterScrollTop
      }, 50)
    },
    false
  )
}

export function isIE () {
  const bw = window.navigator.userAgent
  const compare = (s) => bw.indexOf(s) >= 0
  const ie11 = (() => 'ActiveXObject' in window)()
  return compare('MSIE') || ie11
}

/**
 * Remove loading animate
 * @param id parent element id or class
 * @param timeout
 */
export function removeLoadingAnimate (id = '', timeout = 1500) {
  if (id === '') {
    return
  }
  setTimeout(() => {
    document.body.removeChild(document.getElementById(id))
  }, timeout)
}

/**
 * download File
 * @param res
 */
export function downloadFile(res) {
  console.info('filename...........')
  const blob = new Blob([res.data], { type: 'application/octet-stream;charset=UTF-8' })
  const contentDisposition = res.headers['content-disposition']
  const pattern = new RegExp('filename=([^;]+\\.[^\.;]+);*')
  const result = pattern.exec(contentDisposition)
  const filename = result[1]

  console.info('filename', filename)
  const downloadElement = document.createElement('a')
  const href = window.URL.createObjectURL(blob) // 创建下载的链接
  const reg = /^["](.*)["]$/g
  downloadElement.style.display = 'none'
  downloadElement.href = href
  downloadElement.download = decodeURI(filename.replace(reg, '$1')) // 下载后文件名
  document.body.appendChild(downloadElement)
  downloadElement.click() // 点击下载
  document.body.removeChild(downloadElement) // 下载完成移除元素
  window.URL.revokeObjectURL(href)
}