// components/calendarWeek/index.js
var utils = require('../../utils/getperiod')
Component({
 /**
 * 组件的属性列表
 */
 properties: {

 },

 /**
 * 组件的初始数据
 */
 data: {
 valtime: 8,
 dateList: [], // 日历数据数组
 swiperCurrent: 0, // 日历轮播正处在哪个索引位置
 dateCurrent: new Date(), // 正选择的当前日期
 dateCurrentStr: '', // 正选择日期的 id
 dateMonth: '1月', // 正显示的月份
 dateListArray: ['日', '一', '二', '三', '四', '五', '六'],
 },
 ready: function () {
 var that = this;
 var today = utils.formatTime2(new Date());
 this.setData({
 today,
 });
 var d = new Date();
 this.initDate(-5, 2, d); // 日历组件程序 -4左表示过去4周 右1表示过去一周

 },
 /**
 * 组件的方法列表
 */
 methods: {
 tiaotime(e) {
 let data = e.detail.value.split("-")
 var d = new Date(Number(data[0]), Number(data[1]) - 1, Number(data[2]));
 this.setData({
 dateList: []
 })
 this.initDate(-5, 2, d); // 日历组件程序 -4左表示过去4周 右1表示过去一周
 },
 onShow: function (e) {
 wx.getSystemInfo({
 success: (res) => {
 this.setData({
 windowHeight: res.windowHeight,
 windowWidth: res.windowWidth,
 });
 }
 });
 },

 // 日历组件部分
 // ----------------------------
 initDate(left, right, d) {
 var month = utils.addZero(d.getMonth() + 1),
 year = utils.addZero(d.getFullYear()),
 day = utils.addZero(d.getDate());
 for (var i = left; i <= right; i++) {
 this.updateDate(utils.DateAddDay(d, i * 7));//多少天之后的
 }
 
 this.setData({
 swiperCurrent: 5,
 dateCurrent: d,
 dateCurrentStr: d.getFullYear() + '-' + month + '-' + day,
 dateMonth: month + '月',
 dateYear: year + '年',
 dateCurrentStr: year + "-" + month + "-" + day,
 });
 },
 // 获取这周从周日到周六的日期
 calculateDate(_date) {
 var first = utils.FirstDayInThisWeek(_date);
 var d = {
 'month': first.getMonth() + 1,
 'days': [],

 };
 for (var i = 0; i < 7; i++) {
 var dd = utils.DateAddDay(first, i);
 var day = utils.addZero(dd.getDate()),
 year = utils.addZero(dd.getFullYear()),
 month = utils.addZero(dd.getMonth() + 1);

 d.days.push({
 'day': day,
 'id': dd.getFullYear() + '-' + month + '-' + day,
 'ids': dd.getFullYear() + ',' + month + ',' + day,
 });
 }
 return d;
 },
 // 更新日期数组数据
 updateDate(_date, atBefore) {
 var week = this.calculateDate(_date);
 if (atBefore) {
 this.setData({
 dateList: [week].concat(this.data.dateList),
 });
 } else {
 this.setData({
 dateList: this.data.dateList.concat(week),
 });
 }

 },
 // 日历组件轮播切换
 dateSwiperChange(e) {
 const lastIndex = this.data.swiperCurrent
 , currentIndex = e.detail.current
 , dateList = this.data.dateList
 , dateListlen = this.data.dateList.length
 let flag = false
 , key = 'lastMonth' //判断是左划还是右
 // console.log(lastIndex , currentIndex)
 if (lastIndex > currentIndex) {
 lastIndex === 7 && currentIndex === 0
 ? flag = true
 : null

 } else {
 lastIndex === 0 && currentIndex === 7
 ? null
 : flag = true
 }
 if (flag) {
 key = 'nextMonth'
 }
 if (key == 'lastMonth') {
 let nowindex = currentIndex - 3;
 let uptime = currentIndex - 4;
 let a = 0;
 if (nowindex < 0) { nowindex = nowindex + 8; a = 0 }
 if (uptime < 0) { uptime = uptime + 8 }

 let seltime = dateList[nowindex].days[a].ids
 var week = this.calculateDate(utils.formatTime(utils.DateAddDay(seltime, -1)));

 dateList[uptime] = week
 this.setData({
 dateList: dateList
 })

 }
 if (key == 'nextMonth') {
 let indexne = 0
 let aa = 0
 if (currentIndex == 7) { //要更新的下标
 indexne = 0
 aa = 1
 } else {
 indexne = currentIndex + 1
 aa = currentIndex + 2
 }
 if (aa == 8) {
 aa = 0
 }
 //aa 要更新的数组下标 datanex要往后查询一周的日期
 let datanex = dateList[indexne].days[6].ids
 //获取下一周的
 var week = this.calculateDate(utils.formatTime(utils.DateAddDay(datanex, 1)));
 dateList[aa] = week
 
 this.setData({
 dateList: dateList
 })
 }

 var d = this.data.dateList[currentIndex];
 let da = new Date(d.days[0].ids)
 this.setData({
 swiperCurrent: currentIndex,
 dateMonth: d.month + '月',
 dateYear: da.getFullYear()+"年"
 })

 },
 // 获得日期字符串
 getDateStr: function (arg) {
 if (utils.type(arg) == 'array') {
 return arr[0] + '-' + arr[1] + '-' + arr[2] + ' 00:00:00';
 } else if (utils.type(arg) == 'date') {
 return arg.getFullYear() + '-' + (arg.getMonth() + 1) + '-' + arg.getDate() + ' 00:00:00';
 } else if (utils.type(arg) == 'object') {
 return arg.year + '-' + arg.month + '-' + arg.day + ' 00:00:00';
 }
 },

 // 点击日历某日
 chooseDate(e) {
 var str = e.currentTarget.id;
 // console.log(str);
 this.setData({ dateCurrentStr: str });
 this.triggerEvent('mydata', { data: str })
 },
 }
})