//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];
} 

//将秒转化为 X/XX 比如四小时三十六分 为4/36
const day = msd => {
  //不到一分钟的情况；
  let time = Math.floor(msd) + '秒';//整数秒  
  //time = "0/00";
  //超过一分钟的情况
  if (Math.floor(msd) > 60) {
    let min = Math.floor(msd / 60);
    time = min + "分";
    // let hour = Math.floor(min / 60);
    // let minShow = min % 60;
    // time = hour + "/" + minShow ;  
    if (min > 60) {
      min = Math.floor(msd / 60) % 60;
      let hour = Math.floor(msd / 3600);
      time = hour + "小时";
      // time = hour + "时";  
      if (hour > 24) {
        hour = Math.floor(msd / 3600) % 24;
        let day = Math.floor(msd / 3600 / 24);
        time = day + "天";
        // 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 = '1'
      column.columnName = '语文'
    break;
    case '2':
      column.columnId = '2'
      column.columnName = '数学'
    break;
    case '3':
      column.columnId = '3'
      column.columnName = '中文'
    break;   
    case '4':
      column.columnId = '4'
      column.columnName = '英语'
    break;
    case '5':
      column.columnId = '5'
      column.columnName = '科学'
    break;
    case '6':
      column.columnId = '6'
      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
}

//url地址转成对象
function convertObject (str) {
  const arr = str.split('&');
  let obj = {};
  for (let item of arr) {
  let key = item.split('=')[0];
  let val = item.split('=')[1];
    obj[key] = val;
  }
  return obj;
}

/*另一个小程序用到的方法 */
//时间转换
function formatTime(time) {
	let currentTime = (new Date()).getTime();
	let durationTime = (currentTime - Number(time)) / 1000;

	let date = new Date(time)
	let year = date.getFullYear()
	let month = date.getMonth() + 1
	let day = date.getDate()

	let hour = date.getHours()
	let minute = date.getMinutes()
	let second = date.getSeconds()
	let interval = '';
	switch (true) {
		case durationTime < 60:
			interval = '刚刚';
			break;
		case durationTime < 3600:
			interval = `${parseInt(durationTime / 60)}分钟前`;
			break;
		case durationTime < 3600 * 24:
			interval = `${parseInt(durationTime / 3600)}小时前`;
			break;
		default:
			interval = [month, day].map(formatNumber).join('/') + ' ' + [hour, minute].map(formatNumber).join(':');
	}
	return interval
}

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

// 弹出Toast
function showToast(str, mask, icon, time) {
	wx.showToast({
		title: str.toString(),
		mask: mask,
		icon: icon,
		duration: +time
	})
}
//隐藏Toast
function hideToast() {
	wx.hideToast();
}
// 保存文件
function saveFile(tempFile, success) {
	wx.saveFile({
		tempFilePath: tempFile,
		success: function(res) {
			let svaedFile = res.savedFilePath
			if (success) {
				success(svaeFile)
			}
		}
	})
}

module.exports = {
  studyTime,
  studyPageTime,
  strategy,
  gradeUpper,
  day,
  preview,
  getUrl,
  column,
  url,
  topThree,
  replyNo,
  convertObject,
  formatTime,
  showToast,
  hideToast,
  saveFile
}