"""Tests for registers admin configuration."""

import io
from unittest.mock import patch

from apps.registers.admin import RegisterUploadAdmin
from apps.registers.models import Organization, RegisterUpload, RegistryMembershipPeriod
from django.contrib.admin.sites import AdminSite
from django.contrib.messages.storage.fallback import FallbackStorage
from django.core.files.uploadedfile import SimpleUploadedFile
from django.test import RequestFactory, TestCase
from django.urls import reverse
from openpyxl import Workbook

from tests.apps.registers.factories import RegisterFactory
from tests.apps.user.factories import UserFactory


def _build_register_excel_upload(filename: str = "registry.xlsx") -> SimpleUploadedFile:
    workbook = Workbook()
    worksheet = workbook.active
    worksheet.append(["pn_name", "mn_ogrn", "mn_inn", "in_kpp", "mn_okpo"])
    worksheet.append(
        [
            'АО "Тестовая организация"',
            1027600980990,
            7601000086,
            760401001,
            "07506197",
        ]
    )

    buffer = io.BytesIO()
    workbook.save(buffer)
    workbook.close()

    return SimpleUploadedFile(
        filename,
        buffer.getvalue(),
        content_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    )


class RegistersAdminTest(TestCase):
    def setUp(self):
        self.site = AdminSite()
        self.factory = RequestFactory()
        self.user = UserFactory.create_superuser()
        self.client.force_login(self.user)

    def _request(self, path="/admin/registers/registerupload/upload-excel/"):
        request = self.factory.get(path)
        request.user = self.user
        request.session = {}
        request._messages = FallbackStorage(request)
        return request

    def _post_request(self, data):
        request = self.factory.post(
            "/admin/registers/registerupload/upload-excel/",
            data=data,
        )
        request.user = self.user
        request.session = {}
        request._messages = FallbackStorage(request)
        return request

    def test_register_upload_admin_has_custom_upload_route(self):
        admin = RegisterUploadAdmin(RegisterUpload, self.site)
        route_names = [route.name for route in admin.get_urls()]

        self.assertIn("registers_registerupload_upload_excel", route_names)

    def test_register_upload_admin_get_renders_custom_file_picker(self):
        admin = RegisterUploadAdmin(RegisterUpload, self.site)
        response = admin.upload_excel_view(self._request())
        response.render()
        content = response.content.decode("utf-8")

        self.assertEqual(response.status_code, 200)
        self.assertIn('type="file"', content)
        self.assertIn("mx-upload-file", content)
        self.assertIn("multiple", content)

    def test_register_upload_changelist_renders_toolbar_buttons(self):
        response = self.client.get(reverse("admin:index"))

        self.assertEqual(response.status_code, 200)
        self.assertIn("Загрузить реестр", response.content.decode("utf-8"))
        self.assertIn("Добавить загрузку реестра", response.content.decode("utf-8"))
        self.assertIn(
            reverse("admin:registers_registerupload_upload_excel"),
            response.content.decode("utf-8"),
        )
        self.assertIn(
            reverse("admin:registers_registerupload_add"),
            response.content.decode("utf-8"),
        )

    def test_register_upload_admin_upload_excel_success(self):
        admin = RegisterUploadAdmin(RegisterUpload, self.site)
        registry = RegisterFactory()
        uploaded_file = _build_register_excel_upload()
        request = self._post_request(
            {
                "registry": str(registry.id),
                "actual_date": "2026-03-20",
                "file": uploaded_file,
            }
        )

        response = admin.upload_excel_view(request)

        self.assertEqual(response.status_code, 302)
        self.assertEqual(RegisterUpload.objects.count(), 1)
        self.assertEqual(Organization.objects.count(), 1)
        self.assertEqual(RegistryMembershipPeriod.objects.count(), 1)

        upload = RegisterUpload.objects.first()
        self.assertEqual(upload.registry, registry)
        self.assertEqual(upload.actual_date.isoformat(), "2026-03-20")

    def test_register_upload_admin_upload_excel_invalid_extension(self):
        admin = RegisterUploadAdmin(RegisterUpload, self.site)
        registry = RegisterFactory()
        invalid_file = SimpleUploadedFile("registry.txt", b"text/plain")
        request = self._post_request(
            {
                "registry": str(registry.id),
                "actual_date": "2026-03-20",
                "file": invalid_file,
            }
        )

        response = admin.upload_excel_view(request)

        self.assertEqual(response.status_code, 302)
        self.assertEqual(RegisterUpload.objects.count(), 0)

    def test_register_upload_admin_uses_sync_import_service(self):
        admin = RegisterUploadAdmin(RegisterUpload, self.site)
        registry = RegisterFactory()
        uploaded_file = _build_register_excel_upload()
        request = self._post_request(
            {
                "registry": str(registry.id),
                "actual_date": "2026-03-20",
                "file": uploaded_file,
            }
        )

        with patch(
            "apps.registers.admin.RegisterImportService.sync_registry_memberships",
            return_value={
                "registry_name": registry.name,
                "rows_in_file": 1,
                "organizations_created": 1,
                "organizations_updated": 0,
            },
        ) as sync_mock:
            response = admin.upload_excel_view(request)

        self.assertEqual(response.status_code, 302)
        sync_mock.assert_called_once()

    def test_register_upload_admin_processes_multiple_files(self):
        admin = RegisterUploadAdmin(RegisterUpload, self.site)
        registry = RegisterFactory()
        first_upload = _build_register_excel_upload("registry_1.xlsx")
        second_upload = _build_register_excel_upload("registry_2.xlsx")
        request = self._post_request(
            {
                "registry": str(registry.id),
                "actual_date": "2026-03-20",
                "files": [first_upload, second_upload],
            }
        )

        with patch(
            "apps.registers.admin.RegisterImportService.sync_registry_memberships",
            side_effect=[
                {
                    "registry_name": registry.name,
                    "rows_in_file": 1,
                    "organizations_created": 1,
                    "organizations_updated": 0,
                },
                {
                    "registry_name": registry.name,
                    "rows_in_file": 1,
                    "organizations_created": 0,
                    "organizations_updated": 1,
                },
            ],
        ) as sync_mock:
            response = admin.upload_excel_view(request)

        self.assertEqual(response.status_code, 302)
        self.assertEqual(sync_mock.call_count, 2)