import json
from unittest.mock import patch

from django.contrib.auth import get_user_model
from django.test import TestCase
from rest_framework.test import APIRequestFactory, force_authenticate

from external_api_adapter.adapter import AdapterResponse
from farm_hub.models import FarmHub, FarmType

from .views import (
    CurrentFarmChartView,
    GrowthSimulationStatusView,
    GrowthSimulationView,
    HarvestPredictionView,
    YieldPredictionView,
)


class CropSimulationViewTests(TestCase):
    def setUp(self):
        self.factory = APIRequestFactory()
        self.user = get_user_model().objects.create_user(
            username="farmer",
            password="secret123",
            email="farmer@example.com",
            phone_number="09120000000",
        )
        self.other_user = get_user_model().objects.create_user(
            username="other-farmer",
            password="secret123",
            email="other@example.com",
            phone_number="09120000001",
        )
        self.farm_type = FarmType.objects.create(name="زراعی")
        self.farm = FarmHub.objects.create(owner=self.user, farm_type=self.farm_type, name="Farm 1")
        self.other_farm = FarmHub.objects.create(owner=self.other_user, farm_type=self.farm_type, name="Farm 2")

    @patch("yield_harvest.views.external_api_request")
    def test_growth_queues_simulation_task(self, mock_external_api_request):
        mock_external_api_request.return_value = AdapterResponse(
            status_code=202,
            data={
                "data": {
                    "task_id": "growth-task-123",
                    "status_url": "/api/crop-simulation/growth/growth-task-123/status/",
                    "plant_name": "گوجه‌فرنگی",
                }
            },
        )

        request = self.factory.post(
            "/api/yield-harvest/crop-simulation/growth/",
            {"plant_name": "گوجه‌فرنگی", "dynamic_parameters": ["DVS", "LAI"], "farm_uuid": str(self.farm.farm_uuid)},
            format="json",
        )

        response = GrowthSimulationView.as_view()(request)

        self.assertEqual(response.status_code, 202)
        self.assertEqual(response.data["code"], 202)
        self.assertEqual(response.data["data"]["task_id"], "growth-task-123")
        mock_external_api_request.assert_called_once_with(
            "ai",
            "/api/crop-simulation/growth/",
            method="POST",
            payload={
                "plant_name": "گوجه‌فرنگی",
                "dynamic_parameters": ["DVS", "LAI"],
                "farm_uuid": str(self.farm.farm_uuid),
            },
        )

    @patch("yield_harvest.views.external_api_request")
    def test_growth_top_level_route_queues_simulation_task(self, mock_external_api_request):
        mock_external_api_request.return_value = AdapterResponse(
            status_code=202,
            data={
                "data": {
                    "task_id": "growth-task-123",
                    "status_url": "/api/crop-simulation/growth/growth-task-123/status/",
                    "plant_name": "گوجه‌فرنگی",
                }
            },
        )

        response = self.client.post(
            "/api/crop-simulation/growth/",
            data=json.dumps(
                {
                    "plant_name": "گوجه‌فرنگی",
                    "dynamic_parameters": ["DVS", "LAI"],
                    "farm_uuid": str(self.farm.farm_uuid),
                }
            ),
            content_type="application/json",
        )

        self.assertEqual(response.status_code, 202)
        self.assertEqual(response.json()["data"]["task_id"], "growth-task-123")

    def test_growth_requires_farm_uuid_or_weather(self):
        request = self.factory.post(
            "/api/yield-harvest/crop-simulation/growth/",
            {"plant_name": "گوجه‌فرنگی", "dynamic_parameters": ["DVS"]},
            format="json",
        )

        response = GrowthSimulationView.as_view()(request)

        self.assertEqual(response.status_code, 400)

    @patch("yield_harvest.views.external_api_request")
    def test_growth_status_proxies_to_ai_service(self, mock_external_api_request):
        mock_external_api_request.return_value = AdapterResponse(
            status_code=200,
            data={
                "data": {
                    "task_id": "growth-task-123",
                    "status": "SUCCESS",
                    "message": "done",
                    "progress": {},
                    "result": {
                        "plant_name": "گوجه‌فرنگی",
                        "dynamic_parameters": ["DVS", "LAI"],
                        "scenario_id": 1,
                    },
                    "error": "",
                }
            },
        )

        request = self.factory.get("/api/yield-harvest/crop-simulation/growth/growth-task-123/status/?page=1&page_size=10")
        response = GrowthSimulationStatusView.as_view()(request, task_id="growth-task-123")

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.data["code"], 200)
        self.assertEqual(response.data["data"]["status"], "SUCCESS")
        mock_external_api_request.assert_called_once_with(
            "ai",
            "/api/crop-simulation/growth/growth-task-123/status/",
            method="GET",
            query={"page": "1", "page_size": "10"},
        )

    @patch("yield_harvest.views.external_api_request")
    def test_growth_status_top_level_route_proxies_to_ai_service(self, mock_external_api_request):
        mock_external_api_request.return_value = AdapterResponse(
            status_code=200,
            data={
                "data": {
                    "task_id": "growth-task-123",
                    "status": "SUCCESS",
                    "message": "done",
                    "progress": {},
                    "result": {
                        "plant_name": "گوجه‌فرنگی",
                        "dynamic_parameters": ["DVS", "LAI"],
                        "scenario_id": 1,
                    },
                    "error": "",
                }
            },
        )

        response = self.client.get("/api/crop-simulation/growth/growth-task-123/status/?page=1&page_size=10")

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json()["data"]["status"], "SUCCESS")

    def test_legacy_plant_simulator_routes_are_unavailable(self):
        legacy_paths = [
            "/api/yield-harvest/plant-simulator/config/",
            "/api/yield-harvest/plant-simulator/environment/",
            "/api/yield-harvest/plant-simulator/reset/",
            "/api/yield-harvest/plant-simulator/start/",
            "/api/yield-harvest/plant-simulator/state/",
            "/api/yield-harvest/plant-simulator/stop/",
        ]

        for path in legacy_paths:
            response = self.client.get(path)
            self.assertEqual(response.status_code, 404, path)

    @patch("yield_harvest.views.external_api_request")
    def test_current_farm_chart_proxies_to_ai_service(self, mock_external_api_request):
        mock_external_api_request.return_value = AdapterResponse(
            status_code=200,
            data={
                "data": {
                    "result": {
                        "farm_uuid": str(self.farm.farm_uuid),
                        "plant_name": "wheat",
                        "scenario_id": 1,
                        "categories": ["day1"],
                        "series": {"biomass": [1.2]},
                    }
                }
            },
        )

        request = self.factory.post(
            "/api/yield-harvest/crop-simulation/current-farm-chart/",
            {"farm_uuid": str(self.farm.farm_uuid), "plant_name": "wheat"},
            format="json",
        )
        force_authenticate(request, user=self.user)

        response = CurrentFarmChartView.as_view()(request)

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.data["code"], 200)
        self.assertEqual(response.data["data"]["scenario_id"], 1)
        mock_external_api_request.assert_called_once_with(
            "ai",
            "/api/crop-simulation/current-farm-chart/",
            method="POST",
            payload={"farm_uuid": str(self.farm.farm_uuid), "plant_name": "wheat"},
        )

    @patch("yield_harvest.views.external_api_request")
    def test_harvest_prediction_proxies_to_ai_service(self, mock_external_api_request):
        mock_external_api_request.return_value = AdapterResponse(
            status_code=200,
            data={
                "data": {
                    "result": {
                        "date": "2026-07-15",
                        "dateFormatted": "15 Jul 2026",
                        "daysUntil": 96,
                        "gddDetails": {"current": 800},
                    }
                }
            },
        )

        request = self.factory.post(
            "/api/yield-harvest/crop-simulation/harvest-prediction/",
            {"farm_uuid": str(self.farm.farm_uuid)},
            format="json",
        )
        force_authenticate(request, user=self.user)

        response = HarvestPredictionView.as_view()(request)

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.data["data"]["daysUntil"], 96)
        mock_external_api_request.assert_called_once_with(
            "ai",
            "/api/crop-simulation/harvest-prediction/",
            method="POST",
            payload={"farm_uuid": str(self.farm.farm_uuid), "plant_name": ""},
        )

    @patch("yield_harvest.views.external_api_request")
    def test_yield_prediction_proxies_to_ai_service(self, mock_external_api_request):
        mock_external_api_request.return_value = AdapterResponse(
            status_code=200,
            data={
                "data": {
                    "result": {
                        "farm_uuid": str(self.farm.farm_uuid),
                        "predictedYieldTons": 8.4,
                        "scenarioId": 1,
                    }
                }
            },
        )

        request = self.factory.post(
            "/api/yield-harvest/crop-simulation/yield-prediction/",
            {"farm_uuid": str(self.farm.farm_uuid)},
            format="json",
        )
        force_authenticate(request, user=self.user)

        response = YieldPredictionView.as_view()(request)

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.data["data"]["predictedYieldTons"], 8.4)

    def test_crop_simulation_rejects_foreign_farm_uuid(self):
        request = self.factory.post(
            "/api/yield-harvest/crop-simulation/yield-prediction/",
            {"farm_uuid": str(self.other_farm.farm_uuid)},
            format="json",
        )
        force_authenticate(request, user=self.user)

        response = YieldPredictionView.as_view()(request)

        self.assertEqual(response.status_code, 404)
        self.assertEqual(response.data["code"], 404)
        self.assertEqual(response.data["data"]["farm_uuid"][0], "Farm not found.")