import numpy as np

from galileo_rx.acquisition.detector import parabolic_offset
from galileo_rx.acquisition.metrics import calculate_metrics, circular_guard_mask


def test_circular_peak_exclusion_wraparound() -> None:
    mask = circular_guard_mask(10, 0, 2)
    assert not mask[0] and not mask[1] and not mask[2]
    assert not mask[8] and not mask[9]
    assert mask[3]


def test_second_peak_ignores_guard() -> None:
    power = np.ones(20)
    power[0] = 100
    power[19] = 80
    power[8] = 10
    metrics = calculate_metrics(power, 0, 1)
    assert metrics["second_peak"] == 10
    assert metrics["peak_to_second"] == 10


def test_parabolic_peak_interpolation() -> None:
    assert parabolic_offset(3.0, 4.0, 3.0) == 0.0
    assert parabolic_offset(2.0, 4.0, 3.0) > 0