import { getCalendarRange } from '@/utils/dateUtils'

describe('getCalendarRange', () => {
  it('Nov 2025 (5 weeks): 2025-10-27 to 2025-11-30', () => {
    const { start, end } = getCalendarRange(
      new Date('2025-11-01T00:00:00.000Z')
    )
    expect(start.toISOString().slice(0, 10)).toBe('2025-10-27')
    expect(end.toISOString().slice(0, 10)).toBe('2025-11-30')
  })

  it('Dec 2025 (6 weeks): end Sunday 2026-01-04', () => {
    const { start, end } = getCalendarRange(
      new Date('2025-12-01T00:00:00.000Z')
    )
    expect(start.toISOString().slice(0, 10)).toBe('2025-12-01')
    expect(end.toISOString().slice(0, 10)).toBe('2026-01-04')
  })

  it('Feb 2025 (short month): end Sunday 2025-03-02', () => {
    const { start, end } = getCalendarRange(
      new Date('2025-02-01T00:00:00.000Z')
    )
    expect(start.toISOString().slice(0, 10)).toBe('2025-01-27')
    expect(end.toISOString().slice(0, 10)).toBe('2025-03-02')
  })

  it('sets boundary times correctly (start 00:00, end 23:59)', () => {
    const { start, end } = getCalendarRange(
      new Date('2025-11-01T00:00:00.000Z')
    )
    expect(start.getHours()).toBe(0)
    expect(start.getMinutes()).toBe(0)
    expect(start.getSeconds()).toBe(0)
    expect(end.getHours()).toBe(23)
    expect(end.getMinutes()).toBe(59)
  })
})