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
}

//年级显示方法
let gradeArr = ["学前班", "一年级", "二年级", "三年级"]
const gradeUpper = grade => {
  return gradeArr[grade];
} 

//时间转换秒转天或小时或分
const day = msd => {
  let time = Math.floor(msd) + "秒";  
  if( Math.floor(msd )> 60){  
      let min = Math.floor(msd / 60);  
      time = min + "分";   
      if( min > 60 ){  
          min = Math.floor(msd / 60) % 60;  
          let hour = Math.floor( msd / 3600 );  
          // time = hour + "小时" + min + "分";
          time = hour + "时";  
          if( hour > 24 ){  
              hour = Math.floor( msd / 3600 ) % 24;  
              let day = Math.floor(msd / 3600 / 24);
              // time = day + "天" + hour + "小时";
              time = day + "天";  
          }  
      }    
  }   
  return time;          
}

//计算首页学过了多长时间
function studyTime (arr) {
  const studyLog = [];
  const time = new Date();
  for(let item of arr) {
    if(!item.lessonTitle) {
      break;
    }
    let msd = (time - item.gmtCreated*1) / 1000;
    studyLog.push(
      {
      lessonTitle: item.lessonTitle, 
      lessonId: item.lessonId,
      gmtCreated:day(msd) + '之前'
      }
    )
  }
  return studyLog
}

//计算各个页面学了多长时间
function studyPageTime (arr) {
  const studyLog = [];
  const time = new Date();
  for(let item of arr) {
    if(!item.title) {
      break;
    }
    let msd = (time - item.studyDate*1) / 1000;
    studyLog.push(
      {
      title: item.title, 
      lessonId: item.lessonId,
      isStudy: item.isStudy,
      studyDate: day(msd) + '之前'
      }
    )
  }
  return studyLog;
}

//本周推荐勋章攻略 取消<br>
function strategy (str) {
  return str.split('<br/>');
}

//判断能不能预览
function preview (arr) {
  const studyLog = [];
  for(let item of arr) {
    if(item.warePath){
      studyLog.push(
        {
          title: item.title, 
          lessonId: item.lessonId,
          warePath: item.warePath
        }
      )
    }
    
  }
  return studyLog;
}

//获取当前页面传的的值
function getUrl() {
  var pages = getCurrentPages()    //获取加载的页面
  
  var currentPage = pages[pages.length-1]    //获取当前页面的对象
  
  var url = currentPage.route    //当前页面url
  
  var options = currentPage.options    //如果要获取url中所带的参数可以查看options

  return options
}

//判断科目唯一值columnId

function column(columnNum) {
  let column = {};
  switch(columnNum) {
    case '1':
      column.columnId = '3564feb8-05ba-11e8-9771-080027fcfc4b'
      column.columnName = '语文'
    break;
    case '2':
      column.columnId = '2b52f52e-05ba-11e8-9771-080027fcfc4b'
      column.columnName = '数学'
    break;
    case '3':
      column.columnId = '3561f024-05ba-11e8-9771-080027fcfc4b'
      column.columnName = '中文'
    break;   
    case '4':
      column.columnId = '2b5a24ca-05ba-11e8-9771-080027fcfc4b'
      column.columnName = '英语'
    break;
    case '5':
      column.columnId = '23598e64-05ba-11e8-9771-080027fcfc4b'
      column.columnName = '科学'
    break;
    case '6':
      column.columnId = '41209f14-05ba-11e8-9771-080027fcfc4b'
      column.columnName = '艺术'
    break; 
  }
  return column;
}

//输入跳转URL链接
function url(columnNum) {
  let url = '';
  switch(columnNum) {
    case '1':
      url = '../language/language?ind=2'
    break;
    case '2':
      url = '../mathematics/mathematics?ind=3'
    break;
    case '3':
      url = '../chinese/chinese?ind=4'
    break;   
    case '4':
      url = '../english/english?ind=5'
    break;
    case '5':
      url = '../science/science?ind=6'
    break;
    case '6':
      url = '../art/art?ind=7'
    break; 
  }
  return url;
}

//过滤返回回来的数组找出前三名重新排序
function topThree (arr) {
  var arr1 = [];
  for(var item of arr.slice(0,3)){
      if(item.rank == 2){
          arr1.unshift(item)
      }
      if(item.rank == 1) {
          arr1.push(item)
      }
      if(item.rank == 3) {
          arr1.push(item)
      }
   }
   return arr1;
}

//获取回复条数
function replyNo (arr) {
  let num = 0;
  for( let item of arr) {
    num += item.currentReplyCount
  }
  return num
}

module.exports = {
  formatTime: formatTime,
  studyTime,
  studyPageTime,
  strategy,
  gradeUpper,
  day,
  preview,
  getUrl,
  column,
  url,
  topThree,
  replyNo
}