//获取年月日
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: year,
    month: [year, month].map(formatNumber).join('-'),
    day: [year, month, day].map(formatNumber).join('-'),
    month_tow: month,
    allDate: [year, month, day].map(formatNumber).join('-') + " " + hour + ":" + minute
  }
}
const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : '0' + n
}
//删除数组的某一项
const arrRemoveObj = (array, obj) => {
  let length = array.length;
  for (let i = 0; i < length; i++) {
    if (array[i] === obj) {
      if (i === 0) {
        array.shift();
        return array;
      } else if (i === length - 1) {
        array.pop();
        return array;
      } else {
        array.splice(i, 1);
        return array;
      }
    }
  }
}

//获取对应积分类型
const getTypeItem = (arr, id) => {
  var item = arr.filter(element => {
    return typeof (id) == 'string' ? element.code == id : element.id == id
  });
  return item[0]
}
// 获取唯一标识（uid）
const generateUUID = () => {
  var d = new Date().getTime();
  var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
    var r = (d + Math.random() * 16) % 16 | 0;
    d = Math.floor(d / 16);
    return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
  });
  return uuid;
};
// 设置缓存
const setCache = (key, val) => {
  dd.setStorageSync({
    key: key,
    data: val
  });
}
// 获取缓存
const getCache = (key) => {
  return dd.getStorageSync({ key: key }).data;
}
// 防抖
const _debounce = (fn, delay = 500) => {
  let timeout = null; // 创建一个标记用来存放定时器的返回值
  return function () {
    // 每当用户输入的时候把前一个setTimeout clear掉
    clearTimeout(timeout);
    // 然后又创建一个新的setTimeout，
    // 这样就能保证输入字符后的 interval 间隔内如果还有字符输入的话,就不会执行fn函数
    timeout = setTimeout(() => {
      // 关键在第一个参数，为了确保上下文环境为当前的this，所以不能直接用fn
      fn.apply(this, arguments);
    }, delay);
  }
}
// 节流
const _throttle = (fn, interval = 500) => {
  var last;
  var timer;
  return function () {
    var th = this;
    var args = arguments;
    var now = +new Date();
    if (last && now - last < interval) {
      clearTimeout(timer);
      timer = setTimeout(function () { //用户最后一次点击时间间隔小于设置时间执行
        last = now;
        fn.apply(th, args);
      }, interval);
    } else {
      last = now;
      fn.apply(th, args);
    }
  }
}

module.exports = {
  formatTime,
  arrRemoveObj,
  getTypeItem,
  generateUUID,
  setCache,
  getCache,
  _debounce,
  _throttle,
}