function formatePrice(price) {
  return Number(parseFloat(price) / 100).toFixed(2)
}

function formateWeight(weight) {
  return Number(parseFloat(weight) / 1000).toFixed(3)
}

function isEmpty(val) {
  return typeof val === 'undefined' || val === '' || val === null
}

function formateDate(datetime) {
  if (isEmpty(datetime)) {
    return ''
  }
  var date = getDate(datetime.trim())
  var today = getDate()
  var dayCode = 24 * 60 * 60 * 1000
  console.log((date.getTime() - today.getTime()) / dayCode)
  var week = ''
  if (date.getTime() === today.getTime()) {
    week = '(今天)'
  } else if (date.getTime() === today.getTime() + dayCode) {
    week = '(明天)'
  } else if (date.getTime() === today.getTime() - dayCode) {
    week = '(昨天)'
  } else if (date.getTime() === today.getTime() + dayCode * 2) {
    week = '(后天)'
  } else {
    week = ['(周日)', '(周一)', '(周二)', '(周三)', '(周四)', '(周五)', '(周六)'][date.getDay()]
  }
  if (isEmpty(week)) {
    week = ''
  }
  return datetime + week
}

function formateText(text, length) {
  if (!text) {
    return ''
  }
  if (text.length <= length) {
    return text
  }
  return text.substring(0, length) + '...'
}

function isVideoUrl(url){
  if(url && url.indexOf('.mp4') >= 0){
    return true
  }
  return false
}

module.exports = {
  formatePrice: formatePrice,
  formateWeight: formateWeight,
  formateDate: formateDate,
  formateText: formateText,
  isVideoUrl: isVideoUrl
}