from funkwhale_api.playlists import models
from funkwhale_api.playlists import serializers


def test_cannot_max_500_tracks_per_playlist(factories, settings):
    settings.PLAYLISTS_MAX_TRACKS = 2
    playlist = factories['playlists.Playlist']()
    plts = factories['playlists.PlaylistTrack'].create_batch(
        size=2, playlist=playlist)
    track = factories['music.Track']()
    serializer = serializers.PlaylistTrackWriteSerializer(data={
        'playlist': playlist.pk,
        'track': track.pk,
    })

    assert serializer.is_valid() is False
    assert 'playlist' in serializer.errors


def test_create_insert_is_called_when_index_is_None(factories, mocker):
    insert = mocker.spy(models.Playlist, 'insert')
    playlist = factories['playlists.Playlist']()
    track = factories['music.Track']()
    serializer = serializers.PlaylistTrackWriteSerializer(data={
        'playlist': playlist.pk,
        'track': track.pk,
        'index': None,
    })
    assert serializer.is_valid() is True

    plt = serializer.save()
    insert.assert_called_once_with(playlist, plt, None)
    assert plt.index == 0


def test_create_insert_is_called_when_index_is_provided(factories, mocker):
    playlist = factories['playlists.Playlist']()
    first = factories['playlists.PlaylistTrack'](playlist=playlist, index=0)
    insert = mocker.spy(models.Playlist, 'insert')
    factories['playlists.Playlist']()
    track = factories['music.Track']()
    serializer = serializers.PlaylistTrackWriteSerializer(data={
        'playlist': playlist.pk,
        'track': track.pk,
        'index': 0,
    })
    assert serializer.is_valid() is True

    plt = serializer.save()
    first.refresh_from_db()
    insert.assert_called_once_with(playlist, plt, 0)
    assert plt.index == 0
    assert first.index == 1


def test_update_insert_is_called_when_index_is_provided(factories, mocker):
    playlist = factories['playlists.Playlist']()
    first = factories['playlists.PlaylistTrack'](playlist=playlist, index=0)
    second = factories['playlists.PlaylistTrack'](playlist=playlist, index=1)
    insert = mocker.spy(models.Playlist, 'insert')
    factories['playlists.Playlist']()
    track = factories['music.Track']()
    serializer = serializers.PlaylistTrackWriteSerializer(second, data={
        'playlist': playlist.pk,
        'track': second.track.pk,
        'index': 0,
    })
    assert serializer.is_valid() is True

    plt = serializer.save()
    first.refresh_from_db()
    insert.assert_called_once_with(playlist, plt, 0)
    assert plt.index == 0
    assert first.index == 1