package com.example.server.utils;

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

public class TimeUtils {

    public static String getTime(Date currentTime, Date firstTime) {
        Calendar currentTimes = dataToCalendar(currentTime);//当前系统时间转Calendar类型
        Calendar firstTimes = dataToCalendar(firstTime);//查询的数据时间转Calendar类型
        int year = currentTimes.get(Calendar.YEAR) - firstTimes.get(Calendar.YEAR);//获取年
        int month = currentTimes.get(Calendar.MONTH) - firstTimes.get(Calendar.MONTH);
        int day = currentTimes.get(Calendar.DAY_OF_MONTH) - firstTimes.get(Calendar.DAY_OF_MONTH);
        if (currentTime.after(firstTime)) {
            String CountTime;
            if (day < 0) {
                month -= 1;
                currentTimes.add(Calendar.MONTH, -1);
                day = day + currentTimes.getActualMaximum(Calendar.DAY_OF_MONTH);//获取日
            }
            if (month < 0) {
                month = (month + 12) % 12;//获取月
                year--;
            }
            if (year == 0 && month != 0) {
                if (day == 0) {
                    CountTime = "" + month + "月";
                } else {
                    CountTime = "" + month + "月" + day + "天";
                }

            } else if (month == 0 && year != 0) {
                if (day == 0) {
                    CountTime = "" + year + "年";
                } else {
                    CountTime = "" + year + "年" + day + "天";
                }
            } else if (year == 0 && month == 0) {
                CountTime = "" + day + "天";
            } else {
                CountTime = "" + year + "年" + month + "月" + day + "天";
            }
            return CountTime;
        } else {
            return "-1天";
        }

    }
    //Date类型转Calendar类型


    public static Calendar dataToCalendar(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        return calendar;
    }
    public static int daysBetween(Date date1, Date date2) throws ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar cal = Calendar.getInstance();
        cal.setTime(date1);
        long time1 = cal.getTimeInMillis();
        cal.setTime(date2);
        long time2 = cal.getTimeInMillis();
        long between_days = (time2 - time1) / (1000 * 3600 * 24);
        String s = String.valueOf(between_days);
        return Integer.parseInt(s);
    }
    public static long daysBetween(Date date1, Date date2, String type)  {
        long timeDiff = date2.getTime() - date1.getTime();
        long seconds = timeDiff / 1000;
        long minutes = seconds / 60;
        long hours = minutes / 60;
        long days = hours / 24;
        long result = days;
        return result;
    }

    public static Date dateAdd(Date date1, Integer diff, String type) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date1);//设置起时间

        //cal.add(Calendar.YEAR, 1);//增加一年
        //cal.add(Calendar.MONTH, 1);//增加一个月
        cal.add(Calendar.DATE, diff);//增加一天

        System.out.println("输出::" + cal.getTime());
        return cal.getTime();
    }
}