const DEFAULT_EFFECTIVE_TIME = 90 * 24 * 60 * 60 * 1000
/**
 * @description: 缓存到localStorage下，有效期默认3个月，可自定义
 * @param {String} 缓存数据对应的Key
 * @param {data} 缓存数据对应的Value
 * @param {milliseconds} 数据获取有效期，毫秒级
 * @return: undefined
 */
export function save (key, val, time) {
  if (Object.prototype.toString.call(val) !== '[object Undefined]') {
    let curTime = new Date().getTime()
    let effectiveTime = curTime + (time || DEFAULT_EFFECTIVE_TIME)
    window.localStorage.setItem(key, JSON.stringify({ data: val, time: effectiveTime }))
  }
}

/**
 * @description: 获取缓存到localStorage下的数据
 * @param {String} 缓存数据对应的Key
 * @return: 对应的Key的Value数据
 */
export function get (key) {
  try {
    let data = window.localStorage.getItem(key)
    if (data) {
      let dataObj = JSON.parse(data)
      if (dataObj.time - new Date().getTime() < 0) {
        remove(key)
        return ''
      } else {
        return dataObj.data
      }
    } else {
      return ''
    }
  } catch (e) {
    return ''
  }
}

/**
 * @description: 删除缓存到localStorage下的数据
 * @param {String} 缓存数据对应的Key
 * @return: undefined
 */
export function remove (key) {
  window.localStorage.removeItem(key)
}

/**
 * @description: 缓存到sessionStorage下
 * @param {String} 缓存数据对应的Key
 * @param {data} 缓存数据对应的Value
 * @return: undefined
 */
export function sessionSave (key, val) {
  if (Object.prototype.toString.call(val) !== '[object Undefined]') {
    window.sessionStorage.setItem(key, JSON.stringify(val))
  }
}

/**
 * @description: 获取缓存到sessionStorage下的数据
 * @param {String} 缓存数据对应的Key
 * @return: 对应的Key的Value数据
 */
export function sessionGet (key) {
  try {
    let data = window.sessionStorage.getItem(key)
    if (data) {
      return JSON.parse(data)
    } else {
      return ''
    }
  } catch (e) {
    return ''
  }
}

/**
 * @description: 删除缓存到sessionStorage下的数据
 * @param {String} 缓存数据对应的Key
 * @return: undefined
 */
export function sessionRemove (key) {
  window.sessionStorage.removeItem(key)
}