#!/usr/bin/env python3
"""Tests fuer LX200-Protokoll, Mock und Client (Phase 2).

    python3 -m unittest -v test_lx200
"""

import os
import unittest

import config
import coords
import lx200
import mount_mock
import settings
from mount_client import MountClient, MountError, resolve_host


class TestLX200(unittest.TestCase):

    def test_command_rahmen(self):
        self.assertEqual(lx200.command("GR"), ":GR#")
        self.assertEqual(lx200.command(":GR#"), ":GR#")
        self.assertEqual(lx200.command("GR#"), ":GR#")
        self.assertEqual(lx200.command(":GR"), ":GR#")

    def test_command_leer(self):
        with self.assertRaises(lx200.LX200Error):
            lx200.command(":#")

    def test_strip_terminator(self):
        self.assertEqual(lx200.strip_terminator("18:36:56#"), "18:36:56")
        with self.assertRaises(lx200.LX200Error):
            lx200.strip_terminator("18:36:56")


class TestAntwortParsen(unittest.TestCase):
    """Die LX200-Rohantworten muessen direkt in den coords-Parser passen."""

    def test_ra_antwort(self):
        self.assertEqual(coords.parse_ra("18:36:56"), (18, 36, 56))

    def test_dec_antwort_mit_stern(self):
        self.assertEqual(coords.parse_dec("+38*47:01"), ("+", 38, 47, 1))

    def test_dec_antwort_mit_gradzeichen_0xDF(self):
        # Meade-Stil: 0xDF als Gradzeichen
        self.assertEqual(coords.parse_dec("-07\xdf15:30"), ("-", 7, 15, 30))


class TestMockFormat(unittest.TestCase):

    def test_ra_roundtrip(self):
        self.assertEqual(mount_mock._fmt_ra(mount_mock._parse_ra("18:36:56")), "18:36:56")

    def test_dec_roundtrip(self):
        s = mount_mock._parse_dec("-07*15:30")
        self.assertEqual(mount_mock._fmt_dec(s), "-07*15:30")

    def test_ra_wrap(self):
        # 23:59:59 + 2s -> 00:00:01
        self.assertEqual(mount_mock._fmt_ra(mount_mock._parse_ra("23:59:59") + 2), "00:00:01")


class TestClientGegenMock(unittest.TestCase):
    """Vollstaendiger Weg: Client <-> Mock ueber echtes TCP."""

    def setUp(self):
        self.mock = mount_mock.MountMock(host="127.0.0.1", port=0,
                                         ra="18:36:56", dec="+38:47:01")
        self.mock.start()
        self.client = MountClient("127.0.0.1", self.mock.port, timeout=2.0)
        self.client.connect()

    def tearDown(self):
        self.client.close()
        self.mock.stop()

    def test_get_ra(self):
        self.assertEqual(self.client.get_ra(), "18:36:56")

    def test_get_dec(self):
        self.assertEqual(self.client.get_dec(), "+38*47:01")

    def test_get_coordinates_und_formatierung(self):
        ra_raw, dec_raw = self.client.get_coordinates()
        self.assertEqual(coords.format_ra(ra_raw, high_precision=True), "18h36m56s")
        # Seit CHARS_PER_LINE = 10 passt die volle Form mit abschliessendem ".
        self.assertEqual(coords.format_dec(dec_raw, high_precision=True), "+38°47'01\"")

    def test_produktname(self):
        self.assertEqual(self.client.query(lx200.GET_PRODUCT), mount_mock.PRODUCT)

    def test_unbekanntes_kommando_haengt_nicht(self):
        # Muss eine (leere) abgeschlossene Antwort liefern, nicht blockieren.
        self.assertEqual(self.client.query(":GXYZ#"), "")


class TestClientFehler(unittest.TestCase):

    def test_verbindung_verweigert(self):
        # Port, auf dem nichts lauscht
        c = MountClient("127.0.0.1", 1, timeout=0.5)
        with self.assertRaises(MountError):
            c.connect()

    def test_query_ohne_verbindung(self):
        c = MountClient("127.0.0.1", 3490)
        with self.assertRaises(MountError):
            c.get_ra()


class TestAdresswahl(unittest.TestCase):
    """resolve_host: welche Adresse gilt -- Vorgabe, settings.json, config.py.

    Die Adresse ist per MQTT umstellbar (Mock <-> Montierung) und liegt dann in
    settings.json, ueberlebt also einen Stromausfall. Diese Reihenfolge ist der
    Kern davon.
    """

    def setUp(self):
        self.pfad = "test_lx200_settings_tmp.json"
        self._alt = settings.PFAD
        settings.PFAD = self.pfad
        self._weg()

    def tearDown(self):
        settings.PFAD = self._alt
        self._weg()

    def _weg(self):
        try:
            os.remove(self.pfad)
        except OSError:
            pass

    def test_ohne_settings_gilt_config(self):
        self.assertEqual(resolve_host(), config.MOUNT_HOST)

    def test_gespeicherte_adresse_schlaegt_config(self):
        settings.update({"mount_host": "192.168.1.115"})
        self.assertEqual(resolve_host(), "192.168.1.115")

    def test_leere_adresse_faellt_auf_config_zurueck(self):
        settings.update({"mount_host": "192.168.1.115"})
        settings.update({"mount_host": ""})
        self.assertEqual(resolve_host(), config.MOUNT_HOST)

    def test_ausdrueckliche_vorgabe_schlaegt_alles(self):
        """Wer beim Aufruf eine Adresse nennt, meint sie auch (REPL, Tests)."""
        settings.update({"mount_host": "192.168.1.115"})
        self.assertEqual(resolve_host("10.0.0.9"), "10.0.0.9")


if __name__ == "__main__":
    unittest.main(verbosity=2)