const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : '0' + n
}

//  获取当前页url
const getCurrentPageUrl = () => {
  let pages = getCurrentPages();
  let currentPage = pages[pages.length - 1];
  let url = '/' + currentPage.route;
  let options = currentPage.options;
  for (let key in options) {
    url += (url.indexOf('?') >= 0 ? '&' : '?') + `${key}=${options[key]}`;
  }
  return url;
}

const setTimeOutStorage = (key,value,timeout) => {
  let timestamp = Date.parse(new Date());
  wx.setStorageSync(key,
      {
        'value': value,
        'timeout': timestamp + timeout
      })
}

const getTimeoutStorage = (key) => {
  // 当前时间
  let timestamp = Date.parse(new Date());
  // 缓存中的过期时间
  let data = wx.getStorageSync(key);
  let data_expiration = data.timeout;
  let value = data.value;
  if (data_expiration) {
    // 如果超时了，清除缓存，重新登录
    if (timestamp > data_expiration) {
      wx.removeStorageSync(key);
      return null;
    }
  }
  return value;
}

module.exports = {
  formatTime: formatTime,
  getCurrentPageUrl: getCurrentPageUrl,
  setTimeOutStorage: setTimeOutStorage,
  getTimeoutStorage: getTimeoutStorage
}