from django.test import SimpleTestCase
from django.urls import reverse

from apps.system.models import File
from apps.wpm.models import Mlogbw
from apps.wpm.serializers import MlogbwFilesSerializer, MlogbwListSerializer
from apps.wpm.views import MlogbwViewSet


class MlogbwFilesDefinitionTests(SimpleTestCase):
    def test_files_field_links_system_file(self):
        field = Mlogbw._meta.get_field("files")

        self.assertTrue(field.blank)
        self.assertIs(field.remote_field.model, File)
        self.assertEqual(field.remote_field.related_name, "mlogbw_outputs")

    def test_list_serializer_exposes_file_ids_and_details(self):
        fields = MlogbwListSerializer().fields

        self.assertTrue(fields["files"].read_only)
        self.assertTrue(fields["files_"].read_only)

    def test_files_serializer_only_writes_file_relations(self):
        fields = MlogbwFilesSerializer().fields

        self.assertEqual(set(fields), {"id", "files", "files_"})
        self.assertFalse(fields["files"].read_only)

    def test_files_action_supports_read_and_update(self):
        self.assertEqual(MlogbwViewSet.files.mapping["get"], "files")
        self.assertEqual(MlogbwViewSet.files.mapping["put"], "files")
        self.assertEqual(
            reverse("mlogbw-files", kwargs={"pk": "single-id"}),
            "/api/wpm/mlogbw/single-id/files/",
        )