sam-react-prod/src/hooks/useDateRange.ts

'use client';

import { useState } from 'react';
import { getLocalDateString } from '@/lib/utils/date';

// ===== 프리셋 타입 =====
export type DateRangePreset = 'currentYear' | 'currentMonth' | 'today' | 'none';

// ===== 반환 타입 =====
export interface UseDateRangeReturn {
  startDate: string;
  endDate: string;
  setStartDate: React.Dispatch<React.SetStateAction<string>>;
  setEndDate: React.Dispatch<React.SetStateAction<string>>;
}

// ===== 프리셋별 초기값 계산 =====
function getInitialDates(preset: DateRangePreset): { start: string; end: string } {
  const now = new Date();
  switch (preset) {
    case 'currentYear': {
      const year = now.getFullYear();
      return { start: `${year}-01-01`, end: `${year}-12-31` };
    }
    case 'currentMonth': {
      const year = now.getFullYear();
      const month = String(now.getMonth() + 1).padStart(2, '0');
      const lastDay = new Date(year, now.getMonth() + 1, 0).getDate();
      return {
        start: `${year}-${month}-01`,
        end: `${year}-${month}-${String(lastDay).padStart(2, '0')}`,
      };
    }
    case 'today': {
      const today = getLocalDateString(now);
      return { start: today, end: today };
    }
    case 'none':
      return { start: '', end: '' };
  }
}

/**
 * 날짜 범위 상태 관리 훅
 *
 * @param preset - 초기 날짜 범위 프리셋
 *   - 'currentYear': 올해 1/1 ~ 12/31 (회계 관리 기본값)
 *   - 'currentMonth': 이번 달 1일 ~ 말일
 *   - 'today': 오늘 ~ 오늘 (로컬 시간대 기준)
 *   - 'none': 빈 문자열
 *
 * @example
 * const { startDate, endDate, setStartDate, setEndDate } = useDateRange('currentYear');
 */
export function useDateRange(preset: DateRangePreset = 'currentYear'): UseDateRangeReturn {
  const [startDate, setStartDate] = useState(() => getInitialDates(preset).start);
  const [endDate, setEndDate] = useState(() => getInitialDates(preset).end);

  return { startDate, endDate, setStartDate, setEndDate };
}