"""EV presence — čisté helpery (haversine, přechody)."""

from __future__ import annotations

import unittest

from services.telemetry_collector import ev_presence_transition
from services.tesla_client import haversine_m


class HaversineTests(unittest.TestCase):
    def test_zero_distance(self) -> None:
        self.assertAlmostEqual(haversine_m(49.2445, 17.4070, 49.2445, 17.4070), 0.0, places=2)

    def test_known_distance(self) -> None:
        # ~111 km na 1° zeměpisné šířky
        d = haversine_m(49.0, 17.0, 50.0, 17.0)
        self.assertAlmostEqual(d, 111_195, delta=300)

    def test_geofence_scale(self) -> None:
        # ~100 m posun (0.0009° lat)
        d = haversine_m(49.24457, 17.407054, 49.24547, 17.407054)
        self.assertTrue(80 < d < 120, d)


class TransitionTests(unittest.TestCase):
    def test_arrived(self) -> None:
        self.assertEqual(ev_presence_transition(False, True), "arrived")

    def test_left(self) -> None:
        self.assertEqual(ev_presence_transition(True, False), "left")

    def test_none_cases(self) -> None:
        self.assertIsNone(ev_presence_transition(None, True))
        self.assertIsNone(ev_presence_transition(True, None))
        self.assertIsNone(ev_presence_transition(True, True))
        self.assertIsNone(ev_presence_transition(False, False))


if __name__ == "__main__":
    unittest.main()