package com.tcm.training.admin.common;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

public class DateTimes {
    public static final String LOCAL_DATE_TIME_PATTERN = "yyyy-MM-dd HH:mm:ss";
    public static final String LOCAL_DATE_PATTERN = "yyyy-MM-dd";
    public static final String LOCAL_TIME_PATTERN = "HH:mm:ss";
    public static final String PATTERN = LOCAL_DATE_TIME_PATTERN;

    private static final DateTimeFormatter LOCAL_DATE_TIME_FORMATTER =
            DateTimeFormatter.ofPattern(LOCAL_DATE_TIME_PATTERN);
    private static final DateTimeFormatter LOCAL_DATE_FORMATTER =
            DateTimeFormatter.ofPattern(LOCAL_DATE_PATTERN);
    private static final DateTimeFormatter LOCAL_TIME_FORMATTER =
            DateTimeFormatter.ofPattern(LOCAL_TIME_PATTERN);

    private DateTimes() {
    }

    public static LocalDateTime parse(String text) {
        if (text == null || text.trim().isEmpty()) {
            return null;
        }
        try {
            return LocalDateTime.parse(text, LOCAL_DATE_TIME_FORMATTER);
        } catch (Exception e) {
            throw new IllegalArgumentException("时间格式错误，需 " + LOCAL_DATE_TIME_PATTERN);
        }
    }

    public static String format(LocalDateTime dt) {
        if (dt == null) {
            return null;
        }
        return LOCAL_DATE_TIME_FORMATTER.format(dt);
    }

    public static String format(LocalDate date) {
        if (date == null) {
            return null;
        }
        return LOCAL_DATE_FORMATTER.format(date);
    }

    public static String format(LocalTime time) {
        if (time == null) {
            return null;
        }
        return LOCAL_TIME_FORMATTER.format(time);
    }

    public static DateTimeFormatter localDateTimeFormatter() {
        return LOCAL_DATE_TIME_FORMATTER;
    }

    public static DateTimeFormatter localDateFormatter() {
        return LOCAL_DATE_FORMATTER;
    }

    public static DateTimeFormatter localTimeFormatter() {
        return LOCAL_TIME_FORMATTER;
    }
}