package com.engine.common.util;

import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.Period;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;

public class DateUtil {
    public static DateTimeFormatter yyyyMMdd = DateTimeFormatter.ofPattern("yyyy-MM-dd");
    public static DateTimeFormatter yyyyMMddHHmmss = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    public static DateTimeFormatter yyyyMMddHHmm = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
    public static DateTimeFormatter yyyyMM = DateTimeFormatter.ofPattern("yyyy-MM");

    public static String beforeMonth(String time){
        LocalDateTime localDateTime = LocalDate.parse(time, yyyyMMdd).atStartOfDay();
        return localDateTime.minusMonths(1).format(yyyyMM);
    }
    public static String lastMonth(String time){
        LocalDateTime localDateTime = LocalDate.parse(time, yyyyMMdd).atStartOfDay();

        return localDateTime.plusMonths(1).format(yyyyMM);
    }


    public static String beforeDay(String time,long day){
        LocalDateTime localDateTime = LocalDate.parse(time, yyyyMMdd).atStartOfDay();
        return localDateTime.minusDays(day).format(yyyyMMdd);
    }
    public static String AfterDay(String time,long day){
        LocalDateTime localDateTime = LocalDate.parse(time, yyyyMMdd).atStartOfDay();

        return localDateTime.plusDays(day).format(yyyyMMdd);
    }

    public static String beforeMinutes(String time,long minutes){
        LocalDateTime localDateTime = DateUtil.getTime(time);
        return localDateTime.minusDays(minutes).format(yyyyMMddHHmm);
    }

    public static String AfterMinutes(String time,long minutes){
        LocalDateTime localDateTime = DateUtil.getTime(time);
        return localDateTime.plusMinutes(minutes).format(yyyyMMddHHmm);
    }

    public static String nowMonth(String time){
        LocalDateTime localDateTime = LocalDate.parse(time, yyyyMMdd).atStartOfDay();
        return localDateTime.format(yyyyMM);
    }

    public static String getCurrentDate(){
        return LocalDateTime.now().format(yyyyMMdd);
    }
    public static String getCurrentTime(){
        return LocalDateTime.now().format(yyyyMMddHHmmss);
    }
    public static String getCurrentTime(String timeType){
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(timeType);
        return LocalDateTime.now().format(formatter);
    }

    //获得往后日期
    public static String getCurrentDatePlusDay(int day){
        return LocalDateTime.now().plusDays(day).format(yyyyMMdd);
    }
    //获得往前日期
    public static String getCurrentDateMinusDay(int day){
        return LocalDateTime.now().minusDays(day).format(yyyyMMdd);
    }


    public static LocalDateTime getTime(String time){
        int length = time.length();
        switch (length){
            case 7:
                return LocalDateTime.parse(time, yyyyMM);
            case 10:
                return LocalDateTime.parse(time, yyyyMMdd);
            case 19:
                return LocalDateTime.parse(time, yyyyMMddHHmmss);
            case 16:
                return LocalDateTime.parse(time, yyyyMMddHHmm);
        }
        return null;
    }


    /**
     * 获得时间与当前相差的小时
     * @param startTime 开始时间 yyyy-MM-dd HH:mm:ss
     * @return
     */
    public static long getBetWeenHours(String startTime){

        Duration duration = Duration.between(LocalDateTime.parse(startTime,yyyyMMddHHmmss),LocalDateTime.now());
        return duration.toHours();
    }
    /**
     * 获得两个时间相差的年份
     * @param startTime 开始时间 yyyy-MM-dd
     * @return
     */
    public static int getBetWeenYears(String startTime){
        Period duration = Period.between(LocalDate.parse(startTime,yyyyMMdd),LocalDateTime.now().toLocalDate());
        return duration.getYears();
    }

    /**
     * 获得两个时间相差的年份
     * @param startTime 开始时间 yyyy-MM-dd
     * @return
     */
    public static int getBetWeenYears(String startTime,String endTime){
        Period duration = Period.between(LocalDate.parse(startTime,yyyyMMdd),LocalDate.parse(endTime,yyyyMMdd));

        return duration.getYears();
    }

    /**
     * 获得当前时间相差的天数
     * @param startTime 开始时间 yyyy-MM-dd
     * @return
     */
    public static int getBetWeenDays(String startTime){
        LocalDate startDate = LocalDate.parse(startTime);
        LocalDate endDate = LocalDateTime.now().toLocalDate();

        long daysBetween = ChronoUnit.DAYS.between(startDate, endDate);
        return Math.toIntExact(daysBetween);
    }
    /**
     * 获得当前时间相差的天数
     * @param startTime 开始时间 yyyy-MM-dd
     * @return
     */
    public static int getBetWeenDays(String startTime,String endTime){
        LocalDate startDate = LocalDate.parse(startTime);
        LocalDate endDate = LocalDate.parse(endTime);

        long daysBetween = ChronoUnit.DAYS.between(startDate, endDate);
        return Math.toIntExact(daysBetween);
    }
    /**
     * 获得当前时间相差的分钟数
     * @param startTime 开始时间 yyyy-MM-dd
     * @return
     */
    public static int getBetWeenMinutes(String startTime,String endTime,DateTimeFormatter formatter){
        LocalDateTime startDate = LocalDateTime.parse(startTime,formatter);
        LocalDateTime endDate = LocalDateTime.parse(endTime,formatter);

        long daysBetween = ChronoUnit.MINUTES.between(startDate, endDate);
        return Math.toIntExact(daysBetween);
    }
    /**
     * 获得当前时间相差的分钟数
     * @param startTime 开始时间 yyyy-MM-dd
     * @return
     */
    public static int getBetWeenMinutes(String startTime,String endTime){
        LocalDateTime startDate = DateUtil.getTime(startTime);
        LocalDateTime endDate = DateUtil.getTime(endTime);

        long daysBetween = ChronoUnit.MINUTES.between(startDate, endDate);
        return Math.toIntExact(daysBetween);
    }

    /**
     * 获得两个时间相差的小时
     * @param startTime 开始时间 yyyy-MM-dd HH:mm:ss
     * @param endTime 结束时间 yyyy-MM-dd HH:mm:ss
     * @return
     */
    public static long getBetWeenHours(String startTime,String endTime){
        Duration duration = Duration.between(LocalDateTime.parse(startTime,yyyyMMddHHmmss),LocalDateTime.parse(endTime,yyyyMMddHHmmss));

        return duration.toHours();
    }


}