package com.kingdee.eas.custom.perfweb.util;

import java.util.Calendar;

/**
 * 类名称: ReportDateUtil
 * 功能描述: 报表日期工具
 * 创建日期: 2026-06-23
 * 作    者: 青梧
 * 版    本: 1.0
 */
public final class ReportDateUtil {

    private ReportDateUtil() {
    }

    public static String getMonthStart(String year, int month) {
        return year + "-" + String.format("%02d", month) + "-01";
    }

    public static String getMonthEnd(String year, int month) {
        return year + "-" + String.format("%02d", month) + "-" + getLastDayOfMonth(Integer.parseInt(year), month);
    }

    public static String formatMonthLabel(String year, int month) {
        return year + "年" + month + "月";
    }

    public static String getLastDayOfMonth(int year, int month) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(year, month - 1, 1);
        int lastDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        return String.format("%02d", lastDay);
    }

    public static String getNextMonthStart(String year, int month) {
        if (month == 12) {
            return (Integer.parseInt(year) + 1) + "-01-01";
        }
        return year + "-" + String.format("%02d", month + 1) + "-01";
    }

    public static String formatMonthLabelFromDayKey(String dayKey) {
        if (dayKey == null || dayKey.length() < 7) {
            return dayKey;
        }
        String year = dayKey.substring(0, 4);
        int month = Integer.parseInt(dayKey.substring(5, 7));
        return formatMonthLabel(year, month);
    }
}