package com.stylefeng.guns.modular.system.util;

import com.stylefeng.guns.core.util.DateUtil;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

//日期转换年龄
public class DataUtil {

	private static TimeZone tz = TimeZone.getTimeZone("GMT+8");

	public static int getAge(Date dateOfBirth) {

		int age = 0;

		Calendar born = Calendar.getInstance();

		Calendar now = Calendar.getInstance();

		if (dateOfBirth != null) {

			now.setTime(new Date());

			born.setTime(dateOfBirth);

			if (born.after(now)) {
				return age;
//				throw new IllegalArgumentException("年龄不能超过当前日期");
			}
			age = now.get(Calendar.YEAR) - born.get(Calendar.YEAR);

			int nowDayOfYear = now.get(Calendar.DAY_OF_YEAR);

			int bornDayOfYear = born.get(Calendar.DAY_OF_YEAR);

//			logger.debug("nowDayOfYear:" + nowDayOfYear + " bornDayOfYear:" + bornDayOfYear);

			if (nowDayOfYear < bornDayOfYear) {

				age -= 1;
			}

		}

		return age;

	}
	/**
	 * 字符串日期转Date yyyy-MM-dd HH:mm:ss
	 *
	 * @param
	 * @return
	 */
	public static Date getDate_str3(String dateStr) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		sdf.setTimeZone(tz);
		if ("".equals(dateStr)) {
			dateStr = sdf.format(DateUtil.getDate());
		}
		Date date = null;
		try {
			date = sdf.parse(dateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return date;
	}


	/**
	 * 日期转毫秒
	 *
	 * @param date
	 * @return
	 */
	public static long getMillisecond(Date date) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String newDate = "";
		if (!"".equals(date)) {
			newDate = sdf.format(date);
		} else {
			newDate = sdf.format(DateUtil.getDate());
		}
		long millisecond = 0;
		try {
			millisecond = sdf.parse(newDate).getTime();
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return millisecond;
	}

	/**
	 * 两日期相差天数
	 *
	 * @param startDate
	 * @param endDate
	 * @return
	 */
	public static long getMinusDay(Date startDate, Date endDate) {
		long startMillisecond = getMillisecond(startDate);
		long endMillisecond = getMillisecond(endDate);
		long minusMillisecond = endMillisecond - startMillisecond;
		long day = 0;
		if (minusMillisecond < 0) {
			day = 0;
		} else {
			day = minusMillisecond / (24 * 3600 * 1000);
		}
		return day;
	}




}