package com.boying.common.util;

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

public class DateUtil {

    public static String DateToString(Date date,String format){
        if(!StringUtil.isNullOrEmpty(format)){
            SimpleDateFormat f = new SimpleDateFormat(format);
            String sDate = f.format(date);
            return sDate;
        }
        SimpleDateFormat f = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss");
        String sDate = f.format(date);
        return sDate;
    }

    public static Date stringToDate(String date,String format) throws ParseException {
        if(!StringUtil.isNullOrEmpty(format)){
            SimpleDateFormat f = new SimpleDateFormat(format);
            return f.parse(date);
        }
        SimpleDateFormat f = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss");
        return f.parse(date);
    }


    public static Date getYearFirst(int year){
        Calendar calendar = Calendar.getInstance();
        calendar.clear();
        calendar.set(Calendar.YEAR, year);
        Date currYearFirst = calendar.getTime();
        return currYearFirst;
    }

    /**
     * 获取某年最后一天日期
     * @param year 年份
     * @return Date
     */
    public static Date getYearLast(int year){
        Calendar calendar = Calendar.getInstance();
        calendar.clear();
        calendar.set(Calendar.YEAR, year);
        calendar.roll(Calendar.DAY_OF_YEAR, -1);
        Date currYearLast = calendar.getTime();

        return currYearLast;
    }

    /**
     * 获取指定年月的第一天
     * @param year
     * @param month
     * @return
     */
    public static Date getFirstDayOfMonth(int year, int month) {
        Calendar cal = Calendar.getInstance();
        //设置年份
        cal.set(Calendar.YEAR, year);
        //设置月份
        cal.set(Calendar.MONTH, month-1);
        //获取某月最小天数
        int firstDay = cal.getMinimum(Calendar.DATE);
        //设置日历中月份的最小天数
        cal.set(Calendar.DAY_OF_MONTH,firstDay);
        return cal.getTime();
    }

    /**
     * 获取指定年月的最后一天
     * @param year
     * @param month
     * @return
     */
    public static Date getLastDayOfMonth(int year, int month) {
        Calendar cal = Calendar.getInstance();
        //设置年份
        cal.set(Calendar.YEAR, year);
        //设置月份
        cal.set(Calendar.MONTH, month-1);
        //获取某月最大天数
        int lastDay = cal.getActualMaximum(Calendar.DATE);
        //设置日历中月份的最大天数
        cal.set(Calendar.DAY_OF_MONTH, lastDay);
        return cal.getTime();
    }

    public static String getFirstTimeByDate() {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Calendar cal = Calendar.getInstance();
        String start_update = format.format(cal.getTime());
        cal.set(Calendar.HOUR_OF_DAY, cal.get(Calendar.HOUR_OF_DAY)-1);
        String end_update = format.format(cal.getTime());
        return end_update;
    }

    public static Date getMinute(Date date,int x){
        Calendar beforeTime = Calendar.getInstance();
        beforeTime.setTime(date);
        beforeTime.add(Calendar.MINUTE, x);
        return beforeTime.getTime();
    }

    //当天的开始
    public static Date getStartTime() {
        Calendar todayStart = Calendar.getInstance();
        todayStart.set(Calendar.HOUR_OF_DAY, 0);
        todayStart.set(Calendar.MINUTE, 0);
        todayStart.set(Calendar.SECOND, 0);
        todayStart.set(Calendar.MILLISECOND, 0);
        return todayStart.getTime();
    }

    //当天的结束
    public static Date getEndTime() {
        Calendar todayEnd = Calendar.getInstance();
        todayEnd.set(Calendar.HOUR_OF_DAY, 23);
        todayEnd.set(Calendar.MINUTE, 59);
        todayEnd.set(Calendar.SECOND, 59);
        todayEnd.set(Calendar.MILLISECOND, 999);
        return todayEnd.getTime();
    }

    /**
     * 获取当月开始时间
     */
    public static Date getMonthStartTime() {
        Calendar calendar = Calendar.getInstance();// 获取当前日期
        calendar.add(Calendar.YEAR, 0);
        calendar.add(Calendar.MONTH, 0);
        calendar.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return calendar.getTime();
    }

    /**
     * 获取当月的结束时间戳
     */
    public static Date getMonthEndTime() {
        Calendar calendar = Calendar.getInstance();// 获取当前日期
        calendar.add(Calendar.YEAR, 0);
        calendar.add(Calendar.MONTH, 0);
        calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));// 获取当前月最后一天
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        calendar.set(Calendar.MILLISECOND, 999);
        return calendar.getTime();
    }

    public static void main(String[] args) throws ParseException {
        //SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        //System.out.println(sdf.format(getDateLessMonth(15)));
        //System.out.println(getYearMoneyDay4("2021-09-02","08:00:00"));
        System.out.println(getFirstTimeByDate());
    }

    //获取参考日期的上n个月的数据
    public static Date getDateLessMonth(int i) {
        Calendar calendar = Calendar.getInstance();// 获取当前日期
        calendar.add(Calendar.DAY_OF_MONTH, -i);// 设置为1号,当前日期既为本月第一天
        return calendar.getTime();
    }

    public static String getYearMoneyDay(){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        return sdf.format(new Date());
    }

    public static String getYearMoneyDay2(){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar    rightNow    =    Calendar.getInstance();
        rightNow.add(Calendar.DATE,1);
        return sdf.format(rightNow.getTime());
    }

    public static String getYearMoneyDay3(String format) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Date parse = sdf.parse(format);

        Calendar    rightNow    =    Calendar.getInstance();
        rightNow.setTime(parse);
        rightNow.add(Calendar.DATE,1);
        return sdf.format(rightNow.getTime());
    }

    public static Date getYearMoneyDay4(String a,String b) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date parse = sdf.parse(getYearMoneyDay3(a)+" "+b);
        return parse;
    }

}