import datetime
import os
import pathlib

from django.core.paginator import Paginator
from django.utils import timezone

from funkwhale_api.federation import serializers
from funkwhale_api.federation import tasks


def test_scan_library_does_nothing_if_federation_disabled(mocker, factories):
    library = factories["federation.Library"](federation_enabled=False)
    tasks.scan_library(library_id=library.pk)

    assert library.tracks.count() == 0


def test_scan_library_page_does_nothing_if_federation_disabled(mocker, factories):
    library = factories["federation.Library"](federation_enabled=False)
    tasks.scan_library_page(library_id=library.pk, page_url=None)

    assert library.tracks.count() == 0


def test_scan_library_fetches_page_and_calls_scan_page(mocker, factories, r_mock):
    now = timezone.now()
    library = factories["federation.Library"](federation_enabled=True)
    collection_conf = {
        "actor": library.actor,
        "id": library.url,
        "page_size": 10,
        "items": range(10),
    }
    collection = serializers.PaginatedCollectionSerializer(collection_conf)
    scan_page = mocker.patch("funkwhale_api.federation.tasks.scan_library_page.delay")
    r_mock.get(collection_conf["id"], json=collection.data)
    tasks.scan_library(library_id=library.pk)

    scan_page.assert_called_once_with(
        library_id=library.id, page_url=collection.data["first"], until=None
    )
    library.refresh_from_db()
    assert library.fetched_date > now


def test_scan_page_fetches_page_and_creates_tracks(mocker, factories, r_mock):
    library = factories["federation.Library"](federation_enabled=True)
    tfs = factories["music.TrackFile"].create_batch(size=5)
    page_conf = {
        "actor": library.actor,
        "id": library.url,
        "page": Paginator(tfs, 5).page(1),
        "item_serializer": serializers.AudioSerializer,
    }
    page = serializers.CollectionPageSerializer(page_conf)
    r_mock.get(page.data["id"], json=page.data)

    tasks.scan_library_page(library_id=library.pk, page_url=page.data["id"])

    lts = list(library.tracks.all().order_by("-published_date"))
    assert len(lts) == 5


def test_scan_page_trigger_next_page_scan_skip_if_same(mocker, factories, r_mock):
    patched_scan = mocker.patch(
        "funkwhale_api.federation.tasks.scan_library_page.delay"
    )
    library = factories["federation.Library"](federation_enabled=True)
    tfs = factories["music.TrackFile"].create_batch(size=1)
    page_conf = {
        "actor": library.actor,
        "id": library.url,
        "page": Paginator(tfs, 3).page(1),
        "item_serializer": serializers.AudioSerializer,
    }
    page = serializers.CollectionPageSerializer(page_conf)
    data = page.data
    data["next"] = data["id"]
    r_mock.get(page.data["id"], json=data)

    tasks.scan_library_page(library_id=library.pk, page_url=data["id"])
    patched_scan.assert_not_called()


def test_scan_page_stops_once_until_is_reached(mocker, factories, r_mock):
    library = factories["federation.Library"](federation_enabled=True)
    tfs = list(reversed(factories["music.TrackFile"].create_batch(size=5)))
    page_conf = {
        "actor": library.actor,
        "id": library.url,
        "page": Paginator(tfs, 3).page(1),
        "item_serializer": serializers.AudioSerializer,
    }
    page = serializers.CollectionPageSerializer(page_conf)
    r_mock.get(page.data["id"], json=page.data)

    tasks.scan_library_page(
        library_id=library.pk, page_url=page.data["id"], until=tfs[1].creation_date
    )

    lts = list(library.tracks.all().order_by("-published_date"))
    assert len(lts) == 2
    for i, tf in enumerate(tfs[:1]):
        assert tf.creation_date == lts[i].published_date


def test_clean_federation_music_cache_if_no_listen(preferences, factories):
    preferences["federation__music_cache_duration"] = 60
    lt1 = factories["federation.LibraryTrack"](with_audio_file=True)
    lt2 = factories["federation.LibraryTrack"](with_audio_file=True)
    lt3 = factories["federation.LibraryTrack"](with_audio_file=True)
    tf1 = factories["music.TrackFile"](accessed_date=timezone.now(), library_track=lt1)
    tf2 = factories["music.TrackFile"](
        accessed_date=timezone.now() - datetime.timedelta(minutes=61), library_track=lt2
    )
    tf3 = factories["music.TrackFile"](accessed_date=None, library_track=lt3)
    path1 = lt1.audio_file.path
    path2 = lt2.audio_file.path
    path3 = lt3.audio_file.path

    tasks.clean_music_cache()

    lt1.refresh_from_db()
    lt2.refresh_from_db()
    lt3.refresh_from_db()

    assert bool(lt1.audio_file) is True
    assert bool(lt2.audio_file) is False
    assert bool(lt3.audio_file) is False
    assert os.path.exists(path1) is True
    assert os.path.exists(path2) is False
    assert os.path.exists(path3) is False


def test_clean_federation_music_cache_orphaned(settings, preferences, factories):
    preferences["federation__music_cache_duration"] = 60
    path = os.path.join(settings.MEDIA_ROOT, "federation_cache")
    keep_path = os.path.join(os.path.join(path, "1a", "b2"), "keep.ogg")
    remove_path = os.path.join(os.path.join(path, "c3", "d4"), "remove.ogg")
    os.makedirs(os.path.dirname(keep_path), exist_ok=True)
    os.makedirs(os.path.dirname(remove_path), exist_ok=True)
    pathlib.Path(keep_path).touch()
    pathlib.Path(remove_path).touch()
    lt = factories["federation.LibraryTrack"](
        with_audio_file=True, audio_file__path=keep_path
    )
    tf = factories["music.TrackFile"](library_track=lt, accessed_date=timezone.now())

    tasks.clean_music_cache()

    lt.refresh_from_db()

    assert bool(lt.audio_file) is True
    assert os.path.exists(lt.audio_file.path) is True
    assert os.path.exists(remove_path) is False