import { describe, it, expect } from 'vitest';
import {
  formatDateForDb,
  getAdjustedDateRange,
  getEffectiveCycleDay,
  getEffectiveDate,
} from '../utils/dateFilter.ts';

describe('dateFilter', () => {
  it('uses the previous day before 17:00 WIB', () => {
    const referenceDate = new Date('2026-06-09T08:30:00.000Z'); // 15:30 WIB

    const effectiveDate = getEffectiveDate(referenceDate);

    expect(formatDateForDb(effectiveDate)).toBe('2026-06-08');
    expect(getEffectiveCycleDay('2026-06-01', referenceDate)).toBe(7);
    expect(getAdjustedDateRange('2026-06-09', '2026-06-09', referenceDate)).toEqual({
      start: '2026-06-08',
      end: '2026-06-08',
    });
  });

  it('uses the current day at or after 17:00 WIB', () => {
    const referenceDate = new Date('2026-06-09T10:30:00.000Z'); // 17:30 WIB

    const effectiveDate = getEffectiveDate(referenceDate);

    expect(formatDateForDb(effectiveDate)).toBe('2026-06-09');
    expect(getEffectiveCycleDay('2026-06-01', referenceDate)).toBe(8);
    expect(getAdjustedDateRange('2026-06-09', '2026-06-09', referenceDate)).toEqual({
      start: '2026-06-09',
      end: '2026-06-09',
    });
  });
});