import pytest

from django.http import Http404

from rest_framework.exceptions import ValidationError
from aircox_streamer.viewsets import (
    ControllerViewSet,
    SourceViewSet,
    StreamerViewSet,
    QueueSourceViewSet,
)


class FakeSerializer:
    def __init__(self, instance, *args, **kwargs):
        self.instance = instance
        self.data = {"instance": self.instance}
        self.args = args
        self.kwargs = kwargs


class FakeRequest:
    def __init__(self, **kwargs):
        self.__dict__.update(**kwargs)


@pytest.fixture
def controller_viewset(streamers, station):
    return ControllerViewSet(
        streamers=streamers,
        streamer=streamers[station.pk],
        serializer_class=FakeSerializer,
    )


@pytest.fixture
def streamer_viewset(streamers, station):
    return StreamerViewSet(
        streamers=streamers,
        streamer=streamers[station.pk],
        serializer_class=FakeSerializer,
    )


@pytest.fixture
def source_viewset(streamers, station):
    return SourceViewSet(
        streamers=streamers,
        streamer=streamers[station.pk],
        serializer_class=FakeSerializer,
    )


@pytest.fixture
def queue_source_viewset(streamers, station):
    return QueueSourceViewSet(
        streamers=streamers,
        streamer=streamers[station.pk],
        serializer_class=FakeSerializer,
    )


class TestControllerViewSet:
    @pytest.mark.django_db
    def test_get_streamer(self, controller_viewset, stations):
        station = stations[0]
        streamer = controller_viewset.get_streamer(station.pk)
        assert streamer.station.pk == station.pk
        assert streamer.calls.get("fetch")

    @pytest.mark.django_db
    def test_get_streamer_station_not_found(self, controller_viewset):
        controller_viewset.streamers.streamers = {}
        with pytest.raises(Http404):
            controller_viewset.get_streamer(1)

    @pytest.mark.django_db
    def test_get_serializer(self, controller_viewset):
        controller_viewset.object = {"object": "value"}
        serializer = controller_viewset.get_serializer(test=True)
        assert serializer.kwargs["test"]
        assert serializer.instance == controller_viewset.object

    @pytest.mark.django_db
    def test_serialize(self, controller_viewset):
        instance = {}
        data = controller_viewset.serialize(instance, test=True)
        assert data == {"instance": instance}


class TestStreamerViewSet:
    @pytest.mark.django_db
    def test_retrieve(self, streamer_viewset):
        streamer_viewset.streamer = {"streamer": "test"}
        resp = streamer_viewset.retrieve(None, None)
        assert resp.data == {"instance": streamer_viewset.streamer}

    @pytest.mark.django_db
    def test_list(self, streamer_viewset):
        streamers = {"a": 1, "b": 2}
        streamer_viewset.streamers.streamers = streamers
        resp = streamer_viewset.list(None)
        assert set(resp.data["results"]["instance"]) == set(streamers.values())


class TestSourceViewSet:
    @pytest.mark.django_db
    def test_get_sources(self, source_viewset, streamers):
        source_viewset.streamer.sources.append(45)
        sources = source_viewset.get_sources()
        assert 45 not in set(sources)

    @pytest.mark.django_db
    def test_get_source(self, source_viewset):
        source = source_viewset.get_source(1)
        assert source.id == 1

    @pytest.mark.django_db
    def test_get_source_not_found(self, source_viewset):
        with pytest.raises(Http404):
            source_viewset.get_source(1000)

    @pytest.mark.django_db
    def test_retrieve(self, source_viewset, station):
        resp = source_viewset.retrieve(None, 0)
        source = source_viewset.streamers[station.pk].sources[0]
        # this is FakeSerializer being used which provides us the proof
        assert resp.data["instance"] == source

    @pytest.mark.django_db
    def test_list(self, source_viewset, station):
        sources = source_viewset.streamers[station.pk].sources
        resp = source_viewset.list(None)
        assert list(resp.data["results"]["instance"]) == sources

    @pytest.mark.django_db
    def test__run(self, source_viewset):
        calls = {}

        def action(x):
            return calls.setdefault("action", True)

        source_viewset._run(0, action)
        assert calls.get("action")

    @pytest.mark.django_db
    def test_all_api_source_actions(self, source_viewset, station):
        source = source_viewset.streamers[station.pk].sources[0]
        request = FakeRequest(POST={"seek": 1})
        source_viewset.get_source = lambda x: source

        for action in ("sync", "skip", "restart", "seek"):
            func = getattr(source_viewset, action)
            func(request, 1)
            assert source.calls.get(action)


class TestQueueSourceViewSet:
    @pytest.mark.django_db
    def test_get_sound_queryset(self, queue_source_viewset, station, sounds):
        ids = {sound.pk for sound in sounds}
        request = FakeRequest(station=station)
        query = queue_source_viewset.get_sound_queryset(request)
        assert set(query.values_list("pk", flat=True)) == ids

    @pytest.mark.django_db
    def test_push(self, queue_source_viewset, station, sounds):
        calls = {}
        sound = sounds[0]
        request = FakeRequest(station=station, data={"sound_id": sound.pk})
        queue_source_viewset._run = lambda pk, func: calls.setdefault("_run", (pk, func))
        result = queue_source_viewset.push(request, 13)
        assert "_run" in calls
        assert result[0] == 13
        assert callable(result[1])

    @pytest.mark.django_db
    def test_push_missing_sound_in_request_post(self, queue_source_viewset, station):
        request = FakeRequest(station=station, data={})
        with pytest.raises(ValidationError):
            queue_source_viewset.push(request, 0)