import sys
import unittest
from pathlib import Path
from unittest import mock

sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))

from cthulhu import settings
from cthulhu import sound_helper


class _FakePlaybin:
    def __init__(self):
        self.properties = {}

    def set_property(self, name, value):
        self.properties[name] = value


class SoundHelperBackendTests(unittest.TestCase):
    def test_create_file_player_uses_playbin_default_sink_for_auto(self):
        fakePlaybin = _FakePlaybin()

        with (
            mock.patch.object(
                sound_helper.Gst.ElementFactory,
                "make",
                return_value=fakePlaybin,
            ) as makeElement,
            mock.patch.object(
                sound_helper.sound_sink,
                "create_audio_sink",
            ) as createAudioSink,
        ):
            player, sinkName, error = sound_helper._create_file_player("worker-file", settings.SOUND_SINK_AUTO)

        self.assertIs(player, fakePlaybin)
        self.assertEqual(sinkName, "playbin-default")
        self.assertIsNone(error)
        createAudioSink.assert_not_called()
        makeElement.assert_called_once_with("playbin", "worker-file")
        self.assertNotIn("audio-sink", fakePlaybin.properties)

    def test_create_file_player_sets_explicit_sink_when_requested(self):
        fakePlaybin = _FakePlaybin()
        fakeSink = object()

        with (
            mock.patch.object(
                sound_helper.Gst.ElementFactory,
                "make",
                return_value=fakePlaybin,
            ) as makeElement,
            mock.patch.object(
                sound_helper.sound_sink,
                "create_audio_sink",
                return_value=(fakeSink, "pulsesink", None),
            ) as createAudioSink,
        ):
            player, sinkName, error = sound_helper._create_file_player("worker-file", settings.SOUND_SINK_PULSE)

        self.assertIs(player, fakePlaybin)
        self.assertEqual(sinkName, "pulsesink")
        self.assertIsNone(error)
        makeElement.assert_called_once_with("playbin", "worker-file")
        createAudioSink.assert_called_once()
        self.assertIs(fakePlaybin.properties["audio-sink"], fakeSink)


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