package cn.com.lzt.common.util;

import org.apache.commons.lang3.StringUtils;

import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.Date;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class DateTimeUtil {

    // 各种时间格式
    public static final DateTimeFormatter dtf_yyyy_MM_dd = DateTimeFormatter.ofPattern(
            "yyyy-MM-dd");
    // 各种时间格式
    public static final DateTimeFormatter dtf_yyyyMMdd = DateTimeFormatter.ofPattern("yyyyMMdd");
    // 各种时间格式
    public static final DateTimeFormatter dtf_dateChinese = DateTimeFormatter.ofPattern(
            "yyyy年MM月dd日");
    public static final DateTimeFormatter dtf_yyyy_MM_dd_HH_mm = DateTimeFormatter.ofPattern(
            "yyyy-MM-dd HH:mm");
    public static final DateTimeFormatter dtf_yyyymmddhhmmss = DateTimeFormatter.ofPattern(
            "yyyyMMddHHmmss");
    public static final DateTimeFormatter dtf_HH_mm = DateTimeFormatter.ofPattern(
            "HH:mm");
    public static final  DateTimeFormatter dtf_yyyy_MM_dd_HH_mm_SS = DateTimeFormatter.ofPattern(
            "yyyy-MM-dd HH:mm:ss");

    /**
     * 日期转换为时间戳秒
     * @param localDateTime
     * @return
     */
    public static long toSeconds(LocalDateTime localDateTime) {
        return localDateTime.toEpochSecond(ZoneOffset.of("+8"));
    }

    public static String formatDateTime(LocalDateTime lastDateTime) {
        return lastDateTime.format(dtf_yyyy_MM_dd_HH_mm_SS);
    }

    public static String formatDateTime(Date date) {
        if(date == null) return "";
        SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyy-MM-dd HH:mm:ss ms");
        return simpleDateFormat.format(date);
    }

    public static String formatDateTime(Object dateTime, String pattern) {
        if(StringUtils.isEmpty(pattern)) pattern = "yyy-MM-dd HH:mm:ss";
        if(dateTime instanceof Date) return formatDateTime((Date)dateTime, pattern);
        else if(dateTime instanceof LocalDateTime) return formatDateTime((LocalDateTime)dateTime, pattern);
        return "";
    }

    public static String formatDateTime(Date date, String pattern) {
        if(date == null) return "";
        SimpleDateFormat simpleDateFormat=new SimpleDateFormat(pattern);
        return simpleDateFormat.format(date);
    }

    public static String formatDateTime(LocalDateTime dateTime, String pattern) {
        if(dateTime == null) return "";
        return dateTime.format(DateTimeFormatter.ofPattern(pattern));
    }

    public static String formatDateTime(LocalDateTime dateTime, DateTimeFormatter dateTimeFormatter) {
        if(dateTime == null) return "";
        return dateTime.format(dateTimeFormatter);
    }

    /**
     * 时间戳秒转换为日期
     * @param seconds
     * @return
     */
    public static LocalDateTime fromSeconds(long seconds) {
        return LocalDateTime.ofEpochSecond(seconds, 0, ZoneOffset.ofHours(8));
    }

    public static LocalDateTime fromMillis(long milliSeconds) {
        return fromSeconds(milliSeconds * 1000);
    }

    public static LocalDate parseLocalDate(String date) {
        return LocalDate.parse(date, dtf_yyyy_MM_dd);
    }

    public static String formatLocalDate(LocalDate localDate) {
        return DateTimeUtil.dtf_yyyy_MM_dd.format(localDate);
    }

    /**
     * 两日期之间的天数
     * @param startDate
     * @param endDate
     * @return
     */
    public static long getDiffDaysCount(LocalDate startDate, LocalDate endDate, boolean includeEndDate) {
        long num = ChronoUnit.DAYS.between(startDate, endDate);
        if(includeEndDate) return num + 1;
        else return num;
    }

    public static List<LocalDate> getDateList(LocalDate startDate, LocalDate endDate, boolean includeEndDate) {
        long numOfDays = DateTimeUtil.getDiffDaysCount(startDate, endDate, includeEndDate);
        List<LocalDate> listOfDates1 = Stream.iterate(startDate, date -> date.plusDays(1))
                .limit(numOfDays)
                .collect(Collectors.toList());
        return listOfDates1;
    }

}