from room_cal.service_api._utils import month_bounds, months_in_range


# ── month_bounds ──────────────────────────────────────────────────────────────

def test_month_bounds_june():
  assert month_bounds(6, 2025) == ('2025-06-01', '2025-06-30')


def test_month_bounds_january():
  assert month_bounds(1, 2025) == ('2025-01-01', '2025-01-31')


def test_month_bounds_december_wraps_year():
  assert month_bounds(12, 2025) == ('2025-12-01', '2025-12-31')


def test_month_bounds_february_non_leap():
  assert month_bounds(2, 2025) == ('2025-02-01', '2025-02-28')


def test_month_bounds_february_leap():
  assert month_bounds(2, 2024) == ('2024-02-01', '2024-02-29')


# ── months_in_range ───────────────────────────────────────────────────────────

def test_months_in_range_single_month():
  assert months_in_range('2025-06-01', '2025-06-30') == [(6, 2025)]


def test_months_in_range_single_day():
  assert months_in_range('2025-06-15', '2025-06-15') == [(6, 2025)]


def test_months_in_range_two_consecutive():
  assert months_in_range('2025-06-01', '2025-07-31') == [(6, 2025), (7, 2025)]


def test_months_in_range_mid_month_boundaries():
  assert months_in_range('2025-06-15', '2025-08-05') == [(6, 2025), (7, 2025), (8, 2025)]


def test_months_in_range_cross_year():
  assert months_in_range('2025-11-01', '2026-02-28') == [
    (11, 2025), (12, 2025), (1, 2026), (2, 2026),
  ]


def test_months_in_range_full_year():
  result = months_in_range('2025-01-01', '2025-12-31')
  assert result == [(m, 2025) for m in range(1, 13)]