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

import pytest

from funkwhale_api.federation import actors
from funkwhale_api.federation import activity
from funkwhale_api.federation import models
from funkwhale_api.federation import serializers
from funkwhale_api.federation import utils
from funkwhale_api.federation import webfinger


@pytest.mark.parametrize('system_actor', actors.SYSTEM_ACTORS.keys())
def test_instance_actors(system_actor, db, api_client):
    actor = actors.SYSTEM_ACTORS[system_actor].get_actor_instance()
    url = reverse(
        'federation:instance-actors-detail',
        kwargs={'actor': system_actor})
    response = api_client.get(url)
    serializer = serializers.ActorSerializer(actor)

    if system_actor == 'library':
        response.data.pop('url')
    assert response.status_code == 200
    assert response.data == serializer.data


@pytest.mark.parametrize('route,kwargs', [
    ('instance-actors-outbox', {'actor': 'library'}),
    ('instance-actors-inbox', {'actor': 'library'}),
    ('instance-actors-detail', {'actor': 'library'}),
    ('well-known-webfinger', {}),
])
def test_instance_endpoints_405_if_federation_disabled(
        authenticated_actor, db, preferences, api_client, route, kwargs):
    preferences['federation__enabled'] = False
    url = reverse('federation:{}'.format(route), kwargs=kwargs)
    response = api_client.get(url)

    assert response.status_code == 405


def test_wellknown_webfinger_validates_resource(
        db, api_client, settings, mocker):
    clean = mocker.spy(webfinger, 'clean_resource')
    url = reverse('federation:well-known-webfinger')
    response = api_client.get(url, data={'resource': 'something'})

    clean.assert_called_once_with('something')
    assert url == '/.well-known/webfinger'
    assert response.status_code == 400
    assert response.data['errors']['resource'] == (
        'Missing webfinger resource type'
    )


@pytest.mark.parametrize('system_actor', actors.SYSTEM_ACTORS.keys())
def test_wellknown_webfinger_system(
        system_actor, db, api_client, settings, mocker):
    actor = actors.SYSTEM_ACTORS[system_actor].get_actor_instance()
    url = reverse('federation:well-known-webfinger')
    response = api_client.get(
        url, data={'resource': 'acct:{}'.format(actor.webfinger_subject)})
    serializer = serializers.ActorWebfingerSerializer(actor)

    assert response.status_code == 200
    assert response['Content-Type'] == 'application/jrd+json'
    assert response.data == serializer.data


def test_wellknown_nodeinfo(db, preferences, api_client, settings):
    expected = {
        'links': [
            {
                'rel': 'http://nodeinfo.diaspora.software/ns/schema/2.0',
                'href': '{}{}'.format(
                    settings.FUNKWHALE_URL,
                    reverse('api:v1:instance:nodeinfo-2.0')
                )
            }
        ]
    }
    url = reverse('federation:well-known-nodeinfo')
    response = api_client.get(url)
    assert response.status_code == 200
    assert response['Content-Type'] == 'application/jrd+json'
    assert response.data == expected


def test_wellknown_nodeinfo_disabled(db, preferences, api_client):
    preferences['instance__nodeinfo_enabled'] = False
    url = reverse('federation:well-known-nodeinfo')
    response = api_client.get(url)
    assert response.status_code == 404


def test_audio_file_list_requires_authenticated_actor(
        db, preferences, api_client):
    preferences['federation__music_needs_approval'] = True
    url = reverse('federation:music:files-list')
    response = api_client.get(url)

    assert response.status_code == 403


def test_audio_file_list_actor_no_page(
        db, preferences, api_client, factories):
    preferences['federation__music_needs_approval'] = False
    preferences['federation__collection_page_size'] = 2
    library = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    tfs = factories['music.TrackFile'].create_batch(size=5)
    conf = {
        'id': utils.full_url(reverse('federation:music:files-list')),
        'page_size': 2,
        'items': list(reversed(tfs)),  # we order by -creation_date
        'item_serializer': serializers.AudioSerializer,
        'actor': library
    }
    expected = serializers.PaginatedCollectionSerializer(conf).data
    url = reverse('federation:music:files-list')
    response = api_client.get(url)

    assert response.status_code == 200
    assert response.data == expected


def test_audio_file_list_actor_page(
        db, preferences, api_client, factories):
    preferences['federation__music_needs_approval'] = False
    preferences['federation__collection_page_size'] = 2
    library = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    tfs = factories['music.TrackFile'].create_batch(size=5)
    conf = {
        'id': utils.full_url(reverse('federation:music:files-list')),
        'page': Paginator(list(reversed(tfs)), 2).page(2),
        'item_serializer': serializers.AudioSerializer,
        'actor': library
    }
    expected = serializers.CollectionPageSerializer(conf).data
    url = reverse('federation:music:files-list')
    response = api_client.get(url, data={'page': 2})

    assert response.status_code == 200
    assert response.data == expected


def test_audio_file_list_actor_page_exclude_federated_files(
        db, preferences, api_client, factories):
    preferences['federation__music_needs_approval'] = False
    library = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    tfs = factories['music.TrackFile'].create_batch(size=5, federation=True)

    url = reverse('federation:music:files-list')
    response = api_client.get(url)

    assert response.status_code == 200
    assert response.data['totalItems'] == 0


def test_audio_file_list_actor_page_error(
        db, preferences, api_client, factories):
    preferences['federation__music_needs_approval'] = False
    url = reverse('federation:music:files-list')
    response = api_client.get(url, data={'page': 'nope'})

    assert response.status_code == 400


def test_audio_file_list_actor_page_error_too_far(
        db, preferences, api_client, factories):
    preferences['federation__music_needs_approval'] = False
    url = reverse('federation:music:files-list')
    response = api_client.get(url, data={'page': 5000})

    assert response.status_code == 404


def test_library_actor_includes_library_link(db, preferences, api_client):
    actor = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    url = reverse(
        'federation:instance-actors-detail',
        kwargs={'actor': 'library'})
    response = api_client.get(url)
    expected_links = [
        {
            'type': 'Link',
            'name': 'library',
            'mediaType': 'application/activity+json',
            'href': utils.full_url(reverse('federation:music:files-list'))
        }
    ]
    assert response.status_code == 200
    assert response.data['url'] == expected_links


def test_can_fetch_library(superuser_api_client, mocker):
    result = {'test': 'test'}
    scan = mocker.patch(
        'funkwhale_api.federation.library.scan_from_account_name',
        return_value=result)

    url = reverse('api:v1:federation:libraries-fetch')
    response = superuser_api_client.get(
        url, data={'account': 'test@test.library'})

    assert response.status_code == 200
    assert response.data == result
    scan.assert_called_once_with('test@test.library')


def test_follow_library(superuser_api_client, mocker, factories, r_mock):
    library_actor = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    actor = factories['federation.Actor']()
    follow = {'test': 'follow'}
    on_commit = mocker.patch(
        'funkwhale_api.common.utils.on_commit')
    actor_data = serializers.ActorSerializer(actor).data
    actor_data['url'] = [{
        'href': 'https://test.library',
        'name': 'library',
        'type': 'Link',
    }]
    library_conf = {
        'id': 'https://test.library',
        'items': range(10),
        'actor': actor,
        'page_size': 5,
    }
    library_data = serializers.PaginatedCollectionSerializer(library_conf).data
    r_mock.get(actor.url, json=actor_data)
    r_mock.get('https://test.library', json=library_data)
    data = {
        'actor': actor.url,
        'autoimport': False,
        'federation_enabled': True,
        'download_files': False,
    }

    url = reverse('api:v1:federation:libraries-list')
    response = superuser_api_client.post(
        url, data)

    assert response.status_code == 201

    follow = models.Follow.objects.get(
        actor=library_actor,
        target=actor,
        approved=None,
    )
    library = follow.library

    assert response.data == serializers.APILibraryCreateSerializer(
        library).data

    on_commit.assert_called_once_with(
        activity.deliver,
        serializers.FollowSerializer(follow).data,
        on_behalf_of=library_actor,
        to=[actor.url]
    )


def test_can_list_system_actor_following(factories, superuser_api_client):
    library_actor = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    follow1 = factories['federation.Follow'](actor=library_actor)
    follow2 = factories['federation.Follow']()

    url = reverse('api:v1:federation:libraries-following')
    response = superuser_api_client.get(url)

    assert response.status_code == 200
    assert response.data['results'] == [
        serializers.APIFollowSerializer(follow1).data
    ]


def test_can_list_system_actor_followers(factories, superuser_api_client):
    library_actor = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    follow1 = factories['federation.Follow'](actor=library_actor)
    follow2 = factories['federation.Follow'](target=library_actor)

    url = reverse('api:v1:federation:libraries-followers')
    response = superuser_api_client.get(url)

    assert response.status_code == 200
    assert response.data['results'] == [
        serializers.APIFollowSerializer(follow2).data
    ]


def test_can_list_libraries(factories, superuser_api_client):
    library1 = factories['federation.Library']()
    library2 = factories['federation.Library']()

    url = reverse('api:v1:federation:libraries-list')
    response = superuser_api_client.get(url)

    assert response.status_code == 200
    assert response.data['results'] == [
        serializers.APILibrarySerializer(library1).data,
        serializers.APILibrarySerializer(library2).data,
    ]


def test_can_detail_library(factories, superuser_api_client):
    library = factories['federation.Library']()

    url = reverse(
        'api:v1:federation:libraries-detail',
        kwargs={'uuid': str(library.uuid)})
    response = superuser_api_client.get(url)

    assert response.status_code == 200
    assert response.data == serializers.APILibrarySerializer(library).data


def test_can_patch_library(factories, superuser_api_client):
    library = factories['federation.Library']()
    data = {
        'federation_enabled': not library.federation_enabled,
        'download_files': not library.download_files,
        'autoimport': not library.autoimport,
    }
    url = reverse(
        'api:v1:federation:libraries-detail',
        kwargs={'uuid': str(library.uuid)})
    response = superuser_api_client.patch(url, data)

    assert response.status_code == 200
    library.refresh_from_db()

    for k, v in data.items():
        assert getattr(library, k) == v


def test_scan_library(factories, mocker, superuser_api_client):
    scan = mocker.patch(
        'funkwhale_api.federation.tasks.scan_library.delay',
        return_value=mocker.Mock(id='id'))
    library = factories['federation.Library']()
    now = timezone.now()
    data = {
        'until': now,
    }
    url = reverse(
        'api:v1:federation:libraries-scan',
        kwargs={'uuid': str(library.uuid)})
    response = superuser_api_client.post(url, data)

    assert response.status_code == 200
    assert response.data == {'task': 'id'}
    scan.assert_called_once_with(
        library_id=library.pk,
        until=now
    )


def test_list_library_tracks(factories, superuser_api_client):
    library = factories['federation.Library']()
    lts = list(reversed(factories['federation.LibraryTrack'].create_batch(
        size=5, library=library)))
    factories['federation.LibraryTrack'].create_batch(size=5)
    url = reverse('api:v1:federation:library-tracks-list')
    response = superuser_api_client.get(url, {'library': library.uuid})

    assert response.status_code == 200
    assert response.data == {
        'results': serializers.APILibraryTrackSerializer(lts, many=True).data,
        'count': 5,
        'previous': None,
        'next': None,
    }


def test_can_update_follow_status(factories, superuser_api_client, mocker):
    patched_accept = mocker.patch(
        'funkwhale_api.federation.activity.accept_follow'
    )
    library_actor = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    follow = factories['federation.Follow'](target=library_actor)

    payload = {
        'follow': follow.pk,
        'approved': True
    }
    url = reverse('api:v1:federation:libraries-followers')
    response = superuser_api_client.patch(url, payload)
    follow.refresh_from_db()

    assert response.status_code == 200
    assert follow.approved is True
    patched_accept.assert_called_once_with(follow)


def test_can_filter_pending_follows(factories, superuser_api_client):
    library_actor = actors.SYSTEM_ACTORS['library'].get_actor_instance()
    follow = factories['federation.Follow'](
        target=library_actor,
        approved=True)

    params = {'pending': True}
    url = reverse('api:v1:federation:libraries-followers')
    response = superuser_api_client.get(url, params)

    assert response.status_code == 200
    assert len(response.data['results']) == 0