export function getDate() {
  const date = new Date()
  const year = date.getFullYear()
  let month = date.getMonth() + 1
  let day = date.getDate()
  if (month < 10) {
    month = '0' + month
  }
  if (day < 10) {
    day = '0' + day
  }
  return year + '-' + month + '-' + day
}

export function formatDate(date) {
  const year = date.getFullYear()
  let month = date.getMonth() + 1
  let day = date.getDate()
  if (month < 10) {
    month = '0' + month
  }
  if (day < 10) {
    day = '0' + day
  }
  return year + '-' + month + '-' + day
}

export function getOneMonthOffset() {
  const myDate = new Date()
  let year = myDate.getFullYear()
  let month = myDate.getMonth()
  let date = myDate.getDate()
  let end = year + '-' + ('0' + (month + 1)).slice(-2) + '-' + ('0' + date).slice(-2)
  if (month === 0) {
    year -= 1
    month = 12
  } else if (month === 2) {
    date = date > 28 ? 28 : date
  } else {
    date = date > 30 ? 30 : date
  }
  let start = year + '-' + ('0' + month).slice(-2) + '-' + ('0' + date).slice(-2)
  return { start, end }
}

export function getOneWeekOffset(start) {
  const weekAgo = new Date(start).getTime() + 7 * 24 * 3600 * 1000
  const endDate = new Date(weekAgo)
  const year = endDate.getFullYear()
  const month = endDate.getMonth() + 1
  const date = endDate.getDate()
  const end = year + '-' + ('0' + month).slice(-2) + '-' + ('0' + date).slice(-2)
  return { start, end }
}

export function getHourMinute() {
  const date = new Date()
  const hour = date.getHours()
  const min = date.getMinutes()
  return Number(hour + '' + ('0' + min).slice(-2))
}

export function getTomorrow() {
  const tomorrow = new Date().getTime() + 24 * 3600 * 1000
  return new Date(tomorrow)
}

export function getAWeekFromNow() {
  const weekAfter = new Date().getTime() + 7 * 24 * 3600 * 1000
  return new Date(weekAfter)
}

export function getOneWeekText() {
  const day = new Date().getDay()
  const weeks = ['日', '一', '二', '三', '四', '五', '六']
  const arr = new Array(7)
  for (let index = 0; index < 7; index++) {
    let tempDay = (day + index) % 7
    arr[index] = weeks[tempDay]
  }
  return arr
}

export function getNextSevenDate() {
  const dates = new Array(7)
  for (let index = 0; index < dates.length; index++) {
    dates[index] = getDateByOffeset(index)
  }
  return dates
}

function getDateByOffeset(offset) {
  const date = new Date()
  date.setDate(date.getDate() + offset) //获取offset天后的日期
  const year = date.getFullYear()
  let month = date.getMonth() + 1 //获取当前月份
  month = month < 10 ? '0' + month : month
  let day = date.getDate() //获取当前月份的日期
  day = day < 10 ? '0' + day : day
  return {
    fullDate: year + '-' + month + '-' + day,
    date: day,
  }
}

export function formatDatetime(date) {
  const year = date.getFullYear()
  let month = date.getMonth() + 1
  let day = date.getDate()
  let hour = date.getHours()
  let minute = date.getMinutes()
  if (month < 10) {
    month = '0' + month
  }
  if (day < 10) {
    day = '0' + day
  }
  return year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':00'
}

export function getDateTime() {
  const date = new Date()
  const year = date.getFullYear()
  let month = date.getMonth() + 1
  let day = date.getDate()
  let hour = date.getHours()
  let minute = date.getMinutes()
  let second = date.getSeconds()
  return year + '-' + ('0' + month).slice(-2) + '-' + ('0' + day).slice(-2) +
      ' ' + ('0' + hour).slice(-2) + ':' + ('0' + minute).slice(-2) + ':' + ('0' + second).slice(-2)
}