/**
 * 
 * @authors yutent (yutent@doui.cc)
 * @date    2017-02-27 22:01:10
 *
 */

"use strict";


//获取当天是本月第几周
if(!Date.isDate){
    Object.defineProperty(Date,
        'isDate',
        {
            value: function(obj){
                return (typeof obj === 'object') && obj.getTime ? true : false
            },
            enumerable: false
        })
}


if(!Date.prototype.getFullWeek){
    //获取当天是本年度第几周
    Object.defineProperty(Date.prototype,
        'getFullWeek',
        {
            value: function(){
                let thisYear = this.getFullYear(),
                    that = new Date(thisYear, 0, 1),
                    firstDay = that.getDay(),
                    numsOfToday = (this - that) / 86400000;
                return Math.ceil((numsOfToday + firstDay) / 7)
            },
            enumerable: false
        })

    //获取当天是本月第几周
    Object.defineProperty(Date.prototype,
        'getWeek',
        {
            value: function(){
                let today = this.getDate(),
                    thisMonth = this.getMonth(),
                    thisYear = this.getFullYear(),
                    firstDay = new Date(thisYear, thisMonth, 1).getDay();
                return Math.ceil((today + firstDay) / 7)
            },
            enumerable: false
        })
}



//时间格式化
if(!Date.prototype.format){
    Object.defineProperty(Date.prototype,
        'format',
        {
            value: function(str){
                str = str || 'Y-m-d H:i:s'
                let week = ['Mon', 'Tues', 'Wed', 'Thur', 'Fri', 'Sat', 'Sun'],
                    dt = {
                        'fullyear': this.getFullYear(),
                        'year': this.getYear(),
                        'fullweek': this.getFullWeek(),
                        'week': this.getWeek(),
                        'month': this.getMonth() + 1,
                        'date': this.getDate(),
                        'day': week[this.getDay()],
                        'hours': this.getHours(),
                        'minutes': this.getMinutes(),
                        'seconds': this.getSeconds()
                    },
                    re;

                dt.g = dt.hours > 12 ? dt.hours - 12 : dt.hours
                
                re = {
                    'Y': dt.fullyear,
                    'y': dt.year,
                    'm': dt.month < 10 ?  '0' + dt.month : dt.month,
                    'n': dt.month,
                    'd': dt.date < 10 ? '0' + dt.date : dt.date,
                    'j': dt.date,
                    'H': dt.hours < 10 ? '0' + dt.hours : dt.hours,
                    'h': dt.g < 10 ? '0' + dt.g : dt.g,
                    'G': dt.hours,
                    'g': dt.g,
                    'i': dt.minutes < 10 ? '0' + dt.minutes : dt.minutes,
                    's': dt.seconds < 10 ? '0' + dt.seconds : dt.seconds,
                    'W': dt.fullweek,
                    'w': dt.week,
                    'D': dt.day
                }

                for(let i in re){
                    str = str.replace(new RegExp(i, 'g'), re[i])
                }
                return str
            },
            enumerable: false
        })
}