package com.core.common;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Objects;
import java.util.concurrent.TimeUnit;

public class DateUtils {

    public static final String yyyyMMdd_C = "yyyy年MM月dd日";
    public static final String yyyyMM_F = "yyyy-MM";
    public static final String yyyyMMdd_F = "yyyy-MM-dd";
    public static final String yyyyMMddHHmmss_F = "yyyy-MM-dd HH:mm:ss";
    public static final String yyyyMMddHHmmsssss_F = "yyyy-MM-dd HH:mm:ss:SSS";
    public static final String yyyy = "yyyy";
    public static final String yyyyMM = "yyyyMM";
    public static final String yyyyMMdd = "yyyyMMdd";
    public static final String yyyyMMddHH = "yyyyMMddHH";
    public static final String yyyyMMddHHmmss = "yyyyMMddHHmmss";
    public static final String YYMMDDHHMMSS = "yyMMddHHmmss";
    public static final String yyyyMMddHHmmsssss = "yyyyMMddHHmmssSSS";

    public static String convert(Date date, String format) {
        return new SimpleDateFormat(format).format(date);
    }

    public static String convert(Date date) {
        return convert(date, yyyyMMddHHmmss_F);
    }

    public static Date convert(String text, String format) {
        if (text.length() < format.length()) {
            throw new RuntimeException("时间解析失败 ==>>" + text);
        }
        if (text.length() > format.length()) {
            text = text.substring(0, format.length());
        }
        try {
            return new SimpleDateFormat(format).parse(text);
        } catch (ParseException e) {
            throw new RuntimeException("时间解析失败 ==>>" + text);
        }
    }

    public static Date convert(String text) {
        return convert(text, yyyyMMddHHmmss_F);
    }

    public static int diff(Date start, Date end) {
        return getDaysByTimestamp(Math.abs(end.getTime() - start.getTime()));
    }

    public static long diffToMinute(Date start, Date end) {
        return Math.abs(end.getTime() - start.getTime()) / 1000L / 60L;
    }

    public static long diffToSeconds(Date start, Date end) {
        return Math.abs(end.getTime() - start.getTime()) / 1000L;
    }

    private static int getDaysByTimestamp(long timestamp) {
        double days = Arith.divides(2, timestamp, 86400000);
        int value = (int) days;
        if (days > value) {
            return value + 1;
        }
        return value;
    }

    public static int diffToNow(Date date) {
        long val = new Date().getTime() - date.getTime();
        return (int) (Math.abs(val) / 1000L);
    }

    public static String createTimeStamp() {
        return Long.toString(System.currentTimeMillis() / 1000L);
    }

    public static Date calculate(Date date, Long amount, TimeUnit unit, boolean before) {
        if (Objects.isNull(date) || Objects.isNull(amount) || Objects.isNull(unit)) {
            return null;
        }
        return new Date(before ? date.getTime() - unit.toMillis(amount) : date.getTime() + unit.toMillis(amount));
    }

    public static Date calculate(Date date, Long amount, TimeUnit unit) {
        return calculate(date, amount, unit, false);
    }

    public static DateEntity getDateEntity(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        DateEntity entity = new DateEntity();
        entity.setYear(calendar.get(Calendar.YEAR));
        entity.setMonth(calendar.get(Calendar.MONTH));
        entity.setDay(calendar.get(Calendar.DAY_OF_MONTH));
        entity.setHour(calendar.get(Calendar.HOUR_OF_DAY));
        entity.setMinute(calendar.get(Calendar.MINUTE));
        entity.setSecond(calendar.get(Calendar.SECOND));
        return entity;
    }

    public static class DateEntity {
        private int year;
        private int month;
        private int day;
        private int hour;
        private int minute;
        private int second;

        public int getYear() {
            return year;
        }

        public void setYear(int year) {
            this.year = year;
        }

        public int getMonth() {
            return month;
        }

        public void setMonth(int month) {
            this.month = month;
        }

        public int getDay() {
            return day;
        }

        public void setDay(int day) {
            this.day = day;
        }

        public int getHour() {
            return hour;
        }

        public void setHour(int hour) {
            this.hour = hour;
        }

        public int getMinute() {
            return minute;
        }

        public void setMinute(int minute) {
            this.minute = minute;
        }

        public int getSecond() {
            return second;
        }

        public void setSecond(int second) {
            this.second = second;
        }
    }
}