import Cookies from 'js-cookie'
const appConfig = require('@/app.config')
const { cookieExpires } = appConfig

export const TOKEN_KEY = 'token'
export const ACCOUNT_KEY = 'account'
export const setToken = (token) => {
  Cookies.set(TOKEN_KEY, token, { expires: cookieExpires || 1 })
}

export const getToken = () => {
  const token = Cookies.get(TOKEN_KEY)
  if (token !== 'undefined') return token
  else return false
}

export const setAccount = (account) => {
  Cookies.set(ACCOUNT_KEY, account, { expires: cookieExpires || 1 })
}

export const getAccount = () => {
  const account = Cookies.get(ACCOUNT_KEY)
  if (account) return account
  else return false
}

export const hasChild = (item) => {
  return item.children && item.children.length !== 0
}

/**
 * @description 本地存储和获取标签导航列表
 */
export const setTagNavListToLocalstorage = list => {
  localStorage.tagNaveList = JSON.stringify(list)
}

/**
 * @returns {Array} 其中的每个元素只包含路由原信息中的name, path, meta三项
 */
export const getTagNavListFromLocalstorage = () => {
  const list = localStorage.tagNaveList
  return list ? JSON.parse(list) : []
}

/**
 * @param {Array} routers 路由列表数组
 * @description 用于找到路由列表中name为home的对象
 */
export const getHomeRouter = (routers, homeName = 'Home') => {
  let i = -1
  const len = routers.length
  let homeRoute = {}
  while (++i < len) {
    const item = routers[i]
    if (item.children && item.children.length) {
      const res = getHomeRouter(item.children, homeName)
      if (res.name) return res
    } else {
      if (item.name === homeName) homeRoute = item
    }
  }
  return homeRoute
}

/**
 * @param {*} list 现有标签导航列表
 * @param {*} newRoute 新添加的路由原信息对象
 * @description 如果该newRoute已经存在则不再添加
 */
export const getNewTagList = (list, newRoute) => {
  const { name, path, meta } = newRoute
  const newList = [...list]
  if (newList.findIndex(item => item.name === name) >= 0) return newList
  else newList.push({ name, path, meta })
  return newList
}

/**
 * @param {Number} times 回调函数需要执行的次数
 * @param {Function} callback 回调函数
 */
export const doCustomTimes = (times, callback) => {
  let i = -1
  while (++i < times) {
    callback(i)
  }
}

export const findNodeUpper = (ele, tag) => {
  if (ele.parentNode) {
    if (ele.parentNode.tagName === tag.toUpperCase()) {
      return ele.parentNode
    } else {
      return findNodeUpper(ele.parentNode, tag)
    }
  }
}

export const findNodeUpperByClasses = (ele, classes) => {
  const parentNode = ele.parentNode
  if (parentNode) {
    const classList = parentNode.classList
    if (classList && classes.every(className => classList.contains(className))) {
      return parentNode
    } else {
      return findNodeUpperByClasses(parentNode, classes)
    }
  }
}

export const findNodeDownward = (ele, tag) => {
  const tagName = tag.toUpperCase()
  if (ele.childNodes.length) {
    let i = -1
    const len = ele.childNodes.length
    while (++i < len) {
      const child = ele.childNodes[i]
      if (child.tagName === tagName) return child
      else return findNodeDownward(child, tag)
    }
  }
}

export const localSave = (key, value) => {
  localStorage.setItem(key, value)
}

export const localRead = (key) => {
  return localStorage.getItem(key) || ''
}

// scrollTop animation
export const scrollTop = (el, from = 0, to, duration = 500, endCallback) => {
  if (!window.requestAnimationFrame) {
    window.requestAnimationFrame = (
      window.webkitRequestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
      function (callback) {
        return window.setTimeout(callback, 1000 / 60)
      }
    )
  }
  const difference = Math.abs(from - to)
  const step = Math.ceil(difference / duration * 50)

  const scroll = (start, end, step) => {
    if (start === end) {
      endCallback && endCallback()
      return
    }

    let d = (start + step > end) ? end : start + step
    if (start > end) {
      d = (start - step < end) ? end : start - step
    }

    if (el === window) {
      window.scrollTo(d, d)
    } else {
      el.scrollTop = d
    }
    window.requestAnimationFrame(() => scroll(d, end, step))
  }
  scroll(from, to, step)
}