import unittest
from unittest.mock import patch

from lib._zyxel import normalize_mac
from lib._arrival_detection import ArrivalDetector, _notify


class ArrivalDetectorTests(unittest.TestCase):
    def test_starting_present_does_not_emit_arrival(self):
        detector = ArrivalDetector(absent_after=2, present_after=2)
        self.assertFalse(detector.sample(True))
        self.assertFalse(detector.sample(True))

    def test_emits_only_after_absence_and_debounced_presence(self):
        detector = ArrivalDetector(absent_after=2, present_after=2)
        for value in (False, False, True):
            self.assertFalse(detector.sample(value))
        self.assertTrue(detector.sample(True))
        self.assertFalse(detector.sample(True))

    def test_single_missed_poll_does_not_mark_absent(self):
        detector = ArrivalDetector(absent_after=2, present_after=1)
        detector.sample(True)
        self.assertFalse(detector.sample(False))
        self.assertFalse(detector.sample(True))


class MacTests(unittest.TestCase):
    def test_normalizes_common_formats(self):
        self.assertEqual(normalize_mac("AA-BB-CC-DD-EE-FF"), "aa:bb:cc:dd:ee:ff")

    def test_rejects_invalid_mac(self):
        with self.assertRaises(ValueError):
            normalize_mac("not-a-mac")


class NotificationTests(unittest.TestCase):
    @patch("lib._arrival_detection.send_notification")
    def test_uses_notify_module(self, send_notification):
        config = {
            "notification": {
                "enabled": True,
                "message": "Welcome home, {name} ({mac})",
                "topic_url": "https://ntfy.example/home",
                "timeout": 4,
            }
        }
        _notify(config, {"name": "Ignace", "mac": "aa:bb:cc:dd:ee:ff"})
        send_notification.assert_called_once_with(
            "Welcome home, Ignace (aa:bb:cc:dd:ee:ff)",
            topic_url="https://ntfy.example/home",
            timeout=4.0,
        )


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