package com.walker.infrastructure.utils;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import com.walker.infrastructure.utils.StringUtils;

/**
 * 日期对象自定义。</p>
 * 该对象用来区分：年、月、日响应的值，在很多情况下我们需要知道其中单独的值。<br>
 * 通过构造函数输入时间字符串，如：2015-11-30 18:50:44，来解析。</p>
 * 已废弃，移动到waler-infrastructure.jar中。
 * @author shikeying
 * @date 2016年5月3日
 *
 */
public class DateObject {

	private static final DateFormat whippletreeTimeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	
	private static final String MIDDLE_LINE = "-";
	
	private int year = 0;
	private int month = 0;
	private int day = 0;
	
	private int dateValue = 0; // 日期值，如：20160503
	private int yearDate = 0;  // 年日期，如：201605
	
	/**
	 * 返回年月，如：201605
	 * @return
	 */
	public int getYearDate() {
		return yearDate;
	}

	public int getYear() {
		return year;
	}

	public int getMonth() {
		return month;
	}

	public int getDay() {
		return day;
	}

	/**
	 * 返回日期6位数值，如：20181225
	 * @return
	 */
	public int getDateValue() {
		return dateValue;
	}

	/**
	 * 创建日期对象
	 * @param timestamp 输入日期字符串，如：2015-11-30 18:50:44
	 */
	public DateObject(String timestamp){
		if(StringUtils.isEmpty(timestamp)){
			throw new IllegalArgumentException("接收到时间数据不存在(timestamp is null)");
		}
		this.dateValue = Integer.parseInt(timestamp.substring(0, 10)
				.replaceAll(MIDDLE_LINE, StringUtils.EMPTY_STRING));
		this.year = dateValue / 10000;
		this.month = dateValue / 100 - this.year * 100;
		this.yearDate = dateValue / 100;
		this.day = dateValue % yearDate;
	}
	
	/**
	 * 使用当前时间作为输入日期
	 */
	public DateObject(){
		this(whippletreeTimeFormat.format(new Date(System.currentTimeMillis())));
	}
	
	/**
	 * 构造函数输入日期数值，转换为日期对象
	 * @param dateValue 日期数值，如：20181225
	 */
	public DateObject(int dateValue){
		if(dateValue <= 0){
			throw new IllegalArgumentException("dateValue must >= 0, eg. 20181225");
		}
		this.dateValue = dateValue;
		this.year = dateValue / 10000;
		this.month = dateValue / 100 - this.year * 100;
		this.yearDate = dateValue / 100;
		this.day = dateValue % yearDate;
	}
	
	@Override
	public String toString(){
		return new StringBuilder().append("[ year=").append(year)
				.append(", month=").append(month)
				.append(", day=").append(day)
				.append(", dateValue=").append(this.dateValue)
				.append(", yearDate=").append(this.yearDate)
				.append("]").toString();
	}
	
	public static void main(String[] args){
//		int dateValue = 20160503;
//		System.out.println(dateValue / 100);
//		int dateValue = 20160430;
//		System.out.println("year  = " + dateValue / 10000);
//		System.out.println("month = " + dateValue / 100);
//		System.out.println("day   = " + dateValue % (dateValue / 100));
		/**
		DateObject obj = new DateObject();
		System.out.println(obj);
		
		
		String[] datas = new String[]{"2015-11-30 18:50:44"
				, "2016-04-30 18:50:44"
				, "2016-05-03 01:23:01"
				, "2016-05-04 01:23:01"
				, "2016-12-31 12:59:00"
		};
		
		for(int i=0; i<datas.length; i++){
			long startTime = System.nanoTime();
			DateObject dateObj = new DateObject(datas[i]);
			long endTime = System.nanoTime();
			System.out.println(dateObj + ", totalTime = " + (endTime - startTime));
		}
		
		String d = DateUtils.getDateTimeForHuman(1463708066124L);
		DateObject dateObj = new DateObject(d);
		System.out.println(dateObj);
		*/
	}
}