from unittest.mock import patch

from django.test import TestCase

from basic_info.models import Merchant, MerchantTypeEnum
from mission.models import MissionCategory
from notifier.models import NotificationEventKeyEnum, Notifier, NotifierChannelEnum, NotifierRoute
from notifier.services import (
    dispatch_notification_event,
    enqueue_notification_event,
    render_notification_content,
    send_notification_with_notifier,
)


class NotifierServiceTestCase(TestCase):
    def setUp(self):
        self.merchant = Merchant.objects.create(name="通知商户", type=MerchantTypeEnum.STORE)
        self.general_category = MissionCategory.objects.create(merchant=self.merchant, name="通用")
        self.after_sale_category = MissionCategory.objects.create(merchant=self.merchant, name="售后")
        self.notifier = Notifier.objects.create(
            merchant=self.merchant,
            name="任务创建通知",
            channel=NotifierChannelEnum.WECOM_WEBHOOK,
            template_key="mission_created",
            config={"key": "abc123", "msgtype": "markdown"},
        )
        self.global_route = NotifierRoute.objects.create(
            merchant=self.merchant,
            notifier=self.notifier,
            event_key=NotificationEventKeyEnum.MISSION_CREATED,
        )

    def test_render_notification_content(self):
        content = render_notification_content(
            notifier=self.notifier,
            payload={
                "mission_id": 12,
                "created_by_name": "张三",
                "creator_name": "张三",
                "category_name": "通用",
                "is_urgent": False,
                "participant_names_display": "李四、王五",
                "description": "检查打印质量",
            },
        )

        self.assertIn("任务已创建", content)
        self.assertIn("任务ID：12", content)
        self.assertIn("创建人：张三", content)

    @patch("notifier.backends.send_wecom_webhook_message")
    def test_send_notification_with_notifier_uses_wecom_backend(self, mock_send):
        mock_send.return_value.ok = True
        mock_send.return_value.errcode = 0
        mock_send.return_value.errmsg = "ok"

        result = send_notification_with_notifier(
            notifier=self.notifier,
            payload={
                "mission_id": 12,
                "created_by_name": "张三",
                "creator_name": "张三",
                "category_name": "通用",
                "is_urgent": True,
                "participant_names_display": "无",
                "description": "检查打印质量",
            },
        )

        self.assertEqual(result["status"], "sent")
        self.assertEqual(result["channel"], NotifierChannelEnum.WECOM_WEBHOOK)
        mock_send.assert_called_once()

    @patch("notifier.services.send_notification_with_notifier")
    def test_dispatch_notification_event_filters_by_route_event_and_enabled(self, mock_send):
        mock_send.side_effect = lambda *, notifier, payload: {
            "notifier_id": notifier.id,
            "status": "sent",
        }
        replied_notifier = Notifier.objects.create(
            merchant=self.merchant,
            name="任务回应通知",
            channel=NotifierChannelEnum.WECOM_WEBHOOK,
            template_key="mission_replied",
            config={"key": "def456"},
        )
        NotifierRoute.objects.create(
            merchant=self.merchant,
            notifier=replied_notifier,
            event_key=NotificationEventKeyEnum.MISSION_REPLIED,
        )
        disabled_notifier = Notifier.objects.create(
            merchant=self.merchant,
            name="停用通知器",
            channel=NotifierChannelEnum.WECOM_WEBHOOK,
            template_key="mission_created",
            is_enabled=False,
            config={"key": "ghi789"},
        )
        NotifierRoute.objects.create(
            merchant=self.merchant,
            notifier=disabled_notifier,
            event_key=NotificationEventKeyEnum.MISSION_CREATED,
        )

        results = dispatch_notification_event(
            event_key=NotificationEventKeyEnum.MISSION_CREATED,
            merchant_id=self.merchant.id,
            payload={"mission_id": 99},
        )

        self.assertEqual(
            results,
            [
                {
                    "notifier_id": self.notifier.id,
                    "status": "sent",
                    "event_key": NotificationEventKeyEnum.MISSION_CREATED,
                    "route_id": self.global_route.id,
                    "route_event_key": NotificationEventKeyEnum.MISSION_CREATED,
                    "route_mission_category_id": None,
                }
            ],
        )
        self.assertEqual(mock_send.call_count, 1)
        self.assertEqual(mock_send.call_args.kwargs["notifier"].id, self.notifier.id)

    @patch("notifier.services.send_notification_with_notifier")
    def test_dispatch_notification_event_prefers_category_specific_route(self, mock_send):
        mock_send.side_effect = lambda *, notifier, payload: {
            "notifier_id": notifier.id,
            "status": "sent",
        }
        specific_route = NotifierRoute.objects.create(
            merchant=self.merchant,
            notifier=self.notifier,
            event_key=NotificationEventKeyEnum.MISSION_CREATED,
            mission_category=self.after_sale_category,
        )

        results = dispatch_notification_event(
            event_key=NotificationEventKeyEnum.MISSION_CREATED,
            merchant_id=self.merchant.id,
            payload={"mission_id": 99, "category_id": self.after_sale_category.id},
        )

        self.assertEqual(mock_send.call_count, 1)
        self.assertEqual(results[0]["route_id"], specific_route.id)
        self.assertEqual(results[0]["route_mission_category_id"], self.after_sale_category.id)

    @patch("notifier.services.send_notification_with_notifier")
    def test_dispatch_notification_event_falls_back_to_global_route(self, mock_send):
        mock_send.side_effect = lambda *, notifier, payload: {
            "notifier_id": notifier.id,
            "status": "sent",
        }

        results = dispatch_notification_event(
            event_key=NotificationEventKeyEnum.MISSION_CREATED,
            merchant_id=self.merchant.id,
            payload={"mission_id": 99, "category_id": self.general_category.id},
        )

        self.assertEqual(mock_send.call_count, 1)
        self.assertEqual(results[0]["route_id"], self.global_route.id)
        self.assertIsNone(results[0]["route_mission_category_id"])

    @patch("notifier.tasks.dispatch_notification_event_task.delay")
    def test_enqueue_notification_event_returns_task_id(self, mock_delay):
        mock_delay.return_value.id = "task-123"

        task_id = enqueue_notification_event(
            event_key=NotificationEventKeyEnum.MISSION_CREATED,
            merchant_id=self.merchant.id,
            payload={"mission_id": 1},
        )

        self.assertEqual(task_id, "task-123")
        mock_delay.assert_called_once()

    @patch("notifier.tasks.dispatch_notification_event_task.delay", side_effect=RuntimeError("broker down"))
    def test_enqueue_notification_event_fails_open(self, mock_delay):
        task_id = enqueue_notification_event(
            event_key=NotificationEventKeyEnum.MISSION_CREATED,
            merchant_id=self.merchant.id,
            payload={"mission_id": 1},
        )

        self.assertIsNone(task_id)
        mock_delay.assert_called_once()