/**
 * Copyright (c) 2015-2016, Chill Zhuang 庄骞 (smallchill@163.com).
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.dsh.course.util;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateFormatUtils;
import org.apache.commons.lang3.time.DateUtils;

import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Objects;
import java.util.TimeZone;

public class DateUtil {

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

    /**
     * 获取YYYY格式
     */
    public static String getYear() {
        return formatDate(new Date(), "yyyy");
    }

    /**
     * 获取YYYY格式
     */
    public static String getYear(Date date) {
        return formatDate(date, "yyyy");
    }

    /**
     * 获取YYYY-MM-DD格式
     */
    public static String getDay() {
        return formatDate(new Date(), "yyyy-MM-dd");
    }

    /**
     * 获取YYYY-MM-DD格式
     */
    public static String getDay(Date date) {
        return formatDate(date, "yyyy-MM-dd");
    }

    /**
     * 获取YYYYMMDD格式
     */
    public static String getDays() {
        return formatDate(new Date(), "yyyyMMdd");
    }

    /**
     * 获取YYYYMMDD格式
     */
    public static String getDays(Date date) {
        return formatDate(date, "yyyyMMdd");
    }

    /**
     * 获取YYYY-MM-DD HH:mm:ss格式
     */
    public static String getTime() {
        return formatDate(new Date(), "yyyy-MM-dd HH:mm:ss");
    }

    /**
     * 获取YYYY-MM-DD HH:mm:ss.SSS格式
     */
    public static String getMsTime() {
        return formatDate(new Date(), "yyyy-MM-dd HH:mm:ss.SSS");
    }

    /**
     * 获取YYYYMMDDHHmmss格式
     */
    public static String getAllTime() {
        return formatDate(new Date(), "yyyyMMddHHmmss");
    }

    /**
     * 获取YYYY-MM-DD HH:mm:ss格式
     */
    public static String getTime(Date date) {
        return formatDate(date, "yyyy-MM-dd HH:mm:ss");
    }

    public static String formatDate(Date date, String pattern) {
        String formatDate = null;
        if (StringUtils.isNotBlank(pattern)) {
            formatDate = DateFormatUtils.format(date, pattern);
        } else {
            formatDate = DateFormatUtils.format(date, "yyyy-MM-dd");
        }
        return formatDate;
    }

    /**
     * 日期比较，如果s>=e 返回true 否则返回false)
     *
     * @author luguosui
     */
    public static boolean compareDate(String s, String e) {
        if (parseDate(s) == null || parseDate(e) == null) {
            return false;
        }
        return parseDate(s).getTime() >= parseDate(e).getTime();
    }

    /**
     * 格式化日期
     */
    public static Date parseDate(String date) {
        return parse(date, "yyyy-MM-dd");
    }

    /**
     * 格式化日期
     */
    public static Date parseTimeMinutes(String date) {
        return parse(date, "yyyy-MM-dd HH:mm");
    }

    /**
     * 格式化日期
     */
    public static Date parseTime(String date) {
        return parse(date, "yyyy-MM-dd HH:mm:ss");
    }

    /**
     * 格式化日期
     */
    public static Date parse(String date, String pattern) {
        try {
            if (Objects.nonNull(date)) {
                return DateUtils.parseDate(date, pattern);
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 格式化日期
     */
    public static String format(Date date, String pattern) {
        return DateFormatUtils.format(date, pattern);
    }

    /**
     * 把日期转换为Timestamp
     */
    public static Timestamp format(Date date) {
        return new Timestamp(date.getTime());
    }

    /**
     * 校验日期是否合法
     */
    public static boolean isValidDate(String s) {
        return parse(s, "yyyy-MM-dd HH:mm:ss") != null;
    }

    /**
     * 校验日期是否合法
     */
    public static boolean isValidDate(String s, String pattern) {
        return parse(s, pattern) != null;
    }

    public static int getDiffYear(String startTime, String endTime) {
        DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
        try {
            int years = (int) (((fmt.parse(endTime).getTime() - fmt.parse(
                    startTime).getTime()) / (1000 * 60 * 60 * 24)) / 365);
            return years;
        } catch (Exception e) {
            // 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
            return 0;
        }
    }

    /**
     * <li>功能描述：时间相减得到天数
     */
    public static long getDaySub(String beginDateStr, String endDateStr) {
        long day = 0;
        SimpleDateFormat format = new SimpleDateFormat(
                "yyyy-MM-dd");
        Date beginDate = null;
        Date endDate = null;

        try {
            beginDate = format.parse(beginDateStr);
            endDate = format.parse(endDateStr);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        day = (endDate.getTime() - beginDate.getTime()) / (24 * 60 * 60 * 1000);
        // System.out.println("相隔的天数="+day);

        return day;
    }

    /**
     * 得到n天之后的日期
     */
    public static String getAfterDayDate(String days) {
        int daysInt = Integer.parseInt(days);

        Calendar canlendar = Calendar.getInstance(); // java.util包
        canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
        Date date = canlendar.getTime();

        SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String dateStr = sdfd.format(date);

        return dateStr;
    }


    /**
     * 得到n天之后的日期
     */
    public static String getAfterDayDate2(Date date, String days) {
        int daysInt = Integer.parseInt(days);

        Calendar canlendar = Calendar.getInstance(); // java.util包
        canlendar.setTime(date);
        canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
        Date afterDate = canlendar.getTime();

        SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd");
        String dateStr = sdfd.format(afterDate);

        return dateStr;
    }

    /**
     * 得到n天之后是周几
     */
    public static String getAfterDayWeek(String days) {
        int daysInt = Integer.parseInt(days);

        Calendar canlendar = Calendar.getInstance(); // java.util包
        canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
        Date date = canlendar.getTime();

        SimpleDateFormat sdf = new SimpleDateFormat("E");
        String dateStr = sdf.format(date);

        return dateStr;
    }


    /**
     * 得到系统日期
     *
     * @return
     */
    public static Date getDate() {
        TimeZone.setDefault(tz);
        return new Date();
    }

    /**
     * 获取当前毫秒数
     *
     * @return long
     */
    public static long getCurMilli() {
        long millisecond = 0;
        Calendar cal = Calendar.getInstance();
        millisecond = cal.getTimeInMillis();
        return millisecond;
    }

    /**
     * 得到系统Calendar日期
     *
     * @return
     */
    public static Calendar getCalendar() {
        TimeZone.setDefault(tz);
        Calendar cal = Calendar.getInstance();
        return cal;
    }

    /**
     * 毫秒转日期时间
     *
     * @param millisecond
     * @return
     */
    public static String getDateTime(long millisecond) {
        if (millisecond == 0) {
            millisecond = getCurMilli();
        }
        SimpleDateFormat dateformat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Calendar calendar = getCalendar();
        calendar.setTimeInMillis(millisecond);
        return dateformat.format(calendar.getTime());
    }

    /**
     * 日期转毫秒（加分钟）
     *
     * @param date
     * @return
     */
    public static long getMillisecond_fz(String date, Integer day) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String newDate = "";
        if ("".equals(date)) {
            newDate = sdf.format(DateUtil.getDate());
        } else {
            newDate = getDateTime(Long.parseLong(date));
        }
        Date dt = null;
        try {
            dt = sdf.parse(newDate);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        Calendar rightNow = Calendar.getInstance();
        rightNow.setTime(dt);
        rightNow.add(Calendar.MINUTE, day);
        Date dt1 = rightNow.getTime();
        return dt1.getTime();
    }


    /**
     * 计算年龄
     *
     * @param birthDate
     * @return
     */
    public static int age(Date birthDate) {
        // 当前日历
        Calendar nowCalendar = Calendar.getInstance();
        // 生日大于当前日期
        if (nowCalendar.before(birthDate)) {
            throw new IllegalArgumentException("The birth date is before current time, it's unbelievable");
        }
        // 当前年月日
        int yearNow = nowCalendar.get(Calendar.YEAR);
        int monthNow = nowCalendar.get(Calendar.MONTH);
        int dayNow = nowCalendar.get(Calendar.DAY_OF_MONTH);
        // 出生日期年月日
        Calendar birthCalendar = Calendar.getInstance();
        birthCalendar.setTime(birthDate);
        int yearBirth = birthCalendar.get(Calendar.YEAR);
        int monthBirth = birthCalendar.get(Calendar.MONTH);
        int dayBirth = birthCalendar.get(Calendar.DAY_OF_MONTH);
        // 粗计算年龄
        int age = yearNow - yearBirth;
        // 当前月份小于出生月份年龄减一
        if (monthNow < monthBirth) {
            age--;
        }
        // 当前月份等于出生月份，日小于生日年龄减一
        else if (monthNow == monthBirth && dayNow < dayBirth) {
            age--;
        }
        // 返回年龄值
        return age;
    }


}