from app.services.geo import GeoService


def _geo():
    import os

    return GeoService(os.environ["ZIP_CENTROID_FILE"])


def test_distance_close_zips_small():
    g = _geo()
    # Two Manhattan ZIPs should be only a few miles apart.
    d = g.distance_miles("10001", "10002")
    assert d is not None and d < 5


def test_distance_coast_to_coast_large():
    g = _geo()
    d = g.distance_miles("20001", "94103")  # DC -> SF
    assert d is not None and d > 2000


def test_within_radius_levels():
    g = _geo()
    assert g.within_radius("20001", "20002", 10) is True
    assert g.within_radius("20001", "98101", 25) is False
    assert g.within_radius("20001", "98101", -1) is True  # nationwide


def test_unknown_zip_fails_open():
    g = _geo()
    assert g.within_radius("20001", "00000", 10) is True