/**
 * 获取本周的第一天
 * 返回格式: YYYY-mm-dd
 *    例子: 当日为: 2020-11-27
 *      返回日期为: 2020-11-23
 * */
export default {
    /**
     * 获取当前月的第一天
     * 返回格式: YYYY-mm-dd
     *    例子: 当日为: 2020-11-27
     *      返回日期为: 2020-11-01
     * */
    getCurrentMonthFirstDay() {
        let date = new Date();
        date.setDate(1);
        let month = parseInt(date.getMonth() + 1);
        let day = date.getDate();
        if (month < 10) {
            month = '0' + month
        }
        if (day < 10) {
            day = '0' + day
        }
        return date.getFullYear() + '-' + month + '-' + day;
    },

    /**
     * 获取当前月的最后一天
     * 返回格式: YYYY-mm-dd
     *    例子: 当日为: 2020-11-27
     *      返回日期为: 2020-11-30
     * */
    getCurrentMonthLastDay() {
        let date = new Date();
        let currentMonth = date.getMonth();
        let nextMonth = ++currentMonth;
        let nextMonthFirstDay = new Date(date.getFullYear(), nextMonth, 1);
        let oneDay = 1000 * 60 * 60 * 24;
        let lastTime = new Date(nextMonthFirstDay - oneDay);
        let month = parseInt(lastTime.getMonth() + 1);
        let day = lastTime.getDate();
        if (month < 10) {
            month = '0' + month
        }
        if (day < 10) {
            day = '0' + day
        }
        return date.getFullYear() + '-' + month + '-' + day;
    },
    getCurrWeek(date){
        var d = date;
        var year = d.getFullYear();
        var month = parseInt(d.getMonth())+1;

        //获取周一
        var beginWhereTheTime = this.GetMondayAndSunday(d);
        var dd = new Date(beginWhereTheTime);
        //获取周天
        dd.setDate(dd.getDate()+6);
        var monthSunday = parseInt(dd.getMonth())+1;
        var endWhereTheTime = dd.getFullYear() + "-" + this.formatDate(monthSunday) + "-" + this.formatDate(dd.getDate());

        return [beginWhereTheTime,endWhereTheTime]
    },
    //获取指定日期所在周周一
    GetMondayAndSunday(dd) {
        var week = dd.getDay(); //获取时间的星期数
        var minus = week ? week - 1 : 6;
        dd.setDate(dd.getDate() - minus); //获取minus天前的日期
        var y = dd.getFullYear();
        var m = dd.getMonth() + 1; //获取月份
        var d = dd.getDate();
        return y + "-" + this.formatDate(m) + "-" + this.formatDate(d);
    },
    //格式化月和日为MM、dd
     formatDate(value){
        if(value < 10){
            value = "0" + value;
        }
        return value;
    }
}