"""Tests for vehicle CRUD endpoints and mobile.de integration."""

import uuid
from datetime import date
from decimal import Decimal
from unittest.mock import AsyncMock, MagicMock, patch

import pytest
import pytest_asyncio
from httpx import ASGITransport, AsyncClient

from app.database import Base, get_db
from app.main import app
from app.models.vehicle import MobileDeListing, Vehicle


@pytest_asyncio.fixture
async def sample_vehicle_data():
    """Valid vehicle data for creation."""
    return {
        "make": "Mercedes-Benz",
        "model": "Actros",
        "fin": "WDB9066351L123456",
        "year": 2020,
        "first_registration": "2020-03-15",
        "power_kw": 300,
        "fuel_type": "Diesel",
        "transmission": "Manual",
        "color": "White",
        "condition": "used",
        "location": "Berlin",
        "availability": "available",
        "price": 45000.00,
        "vehicle_type": "lkw",
        "lkw_type": "sattelzugmaschine",
        "mileage_km": 120000,
        "description": "Well maintained truck",
    }


@pytest_asyncio.fixture
async def created_vehicle(admin_client, sample_vehicle_data):
    """Create a vehicle via API and return the response."""
    response = await admin_client.post("/api/v1/vehicles/", json=sample_vehicle_data)
    assert response.status_code == 201, response.text
    return response.json()


class TestVehicleList:
    """GET /api/v1/vehicles tests."""

    @pytest.mark.asyncio
    async def test_list_vehicles_returns_200_with_pagination(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles returns 200 with paginated list."""
        response = await admin_client.get("/api/v1/vehicles/?page=1&page_size=20")
        assert response.status_code == 200
        data = response.json()
        assert "items" in data
        assert "total" in data
        assert "page" in data
        assert "page_size" in data
        assert data["page"] == 1
        assert data["page_size"] == 20
        assert data["total"] >= 1
        assert len(data["items"]) >= 1

    @pytest.mark.asyncio
    async def test_list_vehicles_filter_by_type(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles?type=lkw returns filtered results."""
        response = await admin_client.get("/api/v1/vehicles/?type=lkw")
        assert response.status_code == 200
        data = response.json()
        for item in data["items"]:
            assert item["vehicle_type"] == "lkw"

    @pytest.mark.asyncio
    async def test_list_vehicles_filter_by_availability(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles?availability=available returns filtered results."""
        response = await admin_client.get("/api/v1/vehicles/?availability=available")
        assert response.status_code == 200
        data = response.json()
        for item in data["items"]:
            assert item["availability"] == "available"

    @pytest.mark.asyncio
    async def test_list_vehicles_sort_descending(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles?sort=-created_at returns sorted results."""
        response = await admin_client.get("/api/v1/vehicles/?sort=-created_at")
        assert response.status_code == 200
        data = response.json()
        if len(data["items"]) >= 2:
            assert data["items"][0]["created_at"] >= data["items"][1]["created_at"]

    @pytest.mark.asyncio
    async def test_list_vehicles_filter_by_price_range(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles?min_price=40000&max_price=50000 returns filtered results."""
        response = await admin_client.get("/api/v1/vehicles/?min_price=40000&max_price=50000")
        assert response.status_code == 200
        data = response.json()
        for item in data["items"]:
            assert float(item["price"]) >= 40000
            assert float(item["price"]) <= 50000

    @pytest.mark.asyncio
    async def test_list_vehicles_search(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles?search=Mercedes returns matching results."""
        response = await admin_client.get("/api/v1/vehicles/?search=Mercedes")
        assert response.status_code == 200
        data = response.json()
        for item in data["items"]:
            assert "Mercedes" in item["make"] or "Mercedes" in item["model"]

    @pytest.mark.asyncio
    async def test_list_vehicles_requires_auth(self, client):
        """GET /api/v1/vehicles without auth returns 401."""
        response = await client.get("/api/v1/vehicles/")
        assert response.status_code == 401


class TestVehicleCreate:
    """POST /api/v1/vehicles tests."""

    @pytest.mark.asyncio
    async def test_create_vehicle_returns_201(self, admin_client, sample_vehicle_data):
        """POST /api/v1/vehicles with valid data returns 201."""
        response = await admin_client.post("/api/v1/vehicles/", json=sample_vehicle_data)
        assert response.status_code == 201
        data = response.json()
        assert data["make"] == sample_vehicle_data["make"]
        assert data["model"] == sample_vehicle_data["model"]
        assert data["fin"] == sample_vehicle_data["fin"]
        assert data["vehicle_type"] == "lkw"
        assert data["id"] is not None

    @pytest.mark.asyncio
    async def test_create_vehicle_missing_make_returns_422(self, admin_client, sample_vehicle_data):
        """POST /api/v1/vehicles without make returns 422."""
        del sample_vehicle_data["make"]
        response = await admin_client.post("/api/v1/vehicles/", json=sample_vehicle_data)
        assert response.status_code == 422

    @pytest.mark.asyncio
    async def test_create_vehicle_missing_fin_returns_422(self, admin_client, sample_vehicle_data):
        """POST /api/v1/vehicles without fin returns 422."""
        del sample_vehicle_data["fin"]
        response = await admin_client.post("/api/v1/vehicles/", json=sample_vehicle_data)
        assert response.status_code == 422

    @pytest.mark.asyncio
    async def test_create_vehicle_short_fin_returns_422(self, admin_client, sample_vehicle_data):
        """POST /api/v1/vehicles with short FIN returns 422."""
        sample_vehicle_data["fin"] = "SHORT"
        response = await admin_client.post("/api/v1/vehicles/", json=sample_vehicle_data)
        assert response.status_code == 422

    @pytest.mark.asyncio
    async def test_create_vehicle_duplicate_fin_returns_409(self, admin_client, sample_vehicle_data, created_vehicle):
        """POST /api/v1/vehicles with duplicate FIN returns 409."""
        response = await admin_client.post("/api/v1/vehicles/", json=sample_vehicle_data)
        assert response.status_code == 409

    @pytest.mark.asyncio
    async def test_create_vehicle_auto_computes_power_hp(self, admin_client, sample_vehicle_data):
        """POST /api/v1/vehicles auto-computes power_hp from power_kw."""
        sample_vehicle_data["power_kw"] = 100
        sample_vehicle_data.pop("power_hp", None)
        response = await admin_client.post("/api/v1/vehicles/", json=sample_vehicle_data)
        assert response.status_code == 201
        data = response.json()
        assert data["power_hp"] == 136  # 100 * 1.35962 ≈ 136


class TestVehicleDetail:
    """GET /api/v1/vehicles/:id tests."""

    @pytest.mark.asyncio
    async def test_get_vehicle_returns_200(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles/:id returns 200 with detail."""
        vehicle_id = created_vehicle["id"]
        response = await admin_client.get(f"/api/v1/vehicles/{vehicle_id}")
        assert response.status_code == 200
        data = response.json()
        assert data["id"] == vehicle_id
        assert data["make"] == created_vehicle["make"]

    @pytest.mark.asyncio
    async def test_get_vehicle_nonexistent_returns_404(self, admin_client):
        """GET /api/v1/vehicles/:id with nonexistent ID returns 404."""
        fake_id = str(uuid.uuid4())
        response = await admin_client.get(f"/api/v1/vehicles/{fake_id}")
        assert response.status_code == 404


class TestVehicleUpdate:
    """PUT /api/v1/vehicles/:id tests."""

    @pytest.mark.asyncio
    async def test_update_vehicle_returns_200(self, admin_client, created_vehicle):
        """PUT /api/v1/vehicles/:id returns 200 with updated data."""
        vehicle_id = created_vehicle["id"]
        response = await admin_client.put(
            f"/api/v1/vehicles/{vehicle_id}",
            json={"price": "42000.00", "availability": "reserved"},
        )
        assert response.status_code == 200
        data = response.json()
        assert float(data["price"]) == 42000.00
        assert data["availability"] == "reserved"

    @pytest.mark.asyncio
    async def test_update_vehicle_nonexistent_returns_404(self, admin_client):
        """PUT /api/v1/vehicles/:id with nonexistent ID returns 404."""
        fake_id = str(uuid.uuid4())
        response = await admin_client.put(
            f"/api/v1/vehicles/{fake_id}",
            json={"price": "42000.00"},
        )
        assert response.status_code == 404

    @pytest.mark.asyncio
    async def test_update_vehicle_no_fields_returns_400(self, admin_client, created_vehicle):
        """PUT /api/v1/vehicles/:id with no fields returns 400."""
        vehicle_id = created_vehicle["id"]
        response = await admin_client.put(
            f"/api/v1/vehicles/{vehicle_id}",
            json={},
        )
        assert response.status_code == 400


class TestVehicleDelete:
    """DELETE /api/v1/vehicles/:id tests."""

    @pytest.mark.asyncio
    async def test_delete_vehicle_returns_200_with_deleted_at(self, admin_client, created_vehicle):
        """DELETE /api/v1/vehicles/:id returns 200 and sets deleted_at."""
        vehicle_id = created_vehicle["id"]
        response = await admin_client.delete(f"/api/v1/vehicles/{vehicle_id}")
        assert response.status_code == 200
        data = response.json()
        assert data["deleted_at"] is not None

    @pytest.mark.asyncio
    async def test_delete_vehicle_nonexistent_returns_404(self, admin_client):
        """DELETE /api/v1/vehicles/:id with nonexistent ID returns 404."""
        fake_id = str(uuid.uuid4())
        response = await admin_client.delete(f"/api/v1/vehicles/{fake_id}")
        assert response.status_code == 404

    @pytest.mark.asyncio
    async def test_deleted_vehicle_not_in_list(self, admin_client, created_vehicle):
        """After soft-delete, vehicle does not appear in list."""
        vehicle_id = created_vehicle["id"]
        await admin_client.delete(f"/api/v1/vehicles/{vehicle_id}")
        response = await admin_client.get("/api/v1/vehicles/")
        assert response.status_code == 200
        data = response.json()
        for item in data["items"]:
            assert item["id"] != vehicle_id

    @pytest.mark.asyncio
    async def test_deleted_vehicle_returns_404_on_detail(self, admin_client, created_vehicle):
        """After soft-delete, GET /api/v1/vehicles/:id returns 404."""
        vehicle_id = created_vehicle["id"]
        await admin_client.delete(f"/api/v1/vehicles/{vehicle_id}")
        response = await admin_client.get(f"/api/v1/vehicles/{vehicle_id}")
        assert response.status_code == 404


class TestMobileDePush:
    """POST /api/v1/vehicles/:id/mobile-de/push tests."""

    @pytest.mark.asyncio
    async def test_push_returns_202(self, admin_client, created_vehicle):
        """POST /api/v1/vehicles/:id/mobile-de/push returns 202."""
        vehicle_id = created_vehicle["id"]
        with patch("app.services.mobilede_service.httpx.AsyncClient") as mock_client_cls:
            mock_response = MagicMock()
            mock_response.status_code = 201
            mock_response.json.return_value = {"id": "mobile-de-ad-123"}
            mock_response.raise_for_status = MagicMock()
            mock_client = AsyncMock()
            mock_client.post = AsyncMock(return_value=mock_response)
            mock_client.__aenter__ = AsyncMock(return_value=mock_client)
            mock_client.__aexit__ = AsyncMock(return_value=None)
            mock_client_cls.return_value = mock_client

            response = await admin_client.post(f"/api/v1/vehicles/{vehicle_id}/mobile-de/push")

        assert response.status_code == 202
        data = response.json()
        assert data["message"] == "Push queued"
        assert data["vehicle_id"] == vehicle_id
        assert data["listing_id"] is not None

    @pytest.mark.asyncio
    async def test_push_nonexistent_vehicle_returns_404(self, admin_client):
        """POST /api/v1/vehicles/:id/mobile-de/push with nonexistent ID returns 404."""
        fake_id = str(uuid.uuid4())
        response = await admin_client.post(f"/api/v1/vehicles/{fake_id}/mobile-de/push")
        assert response.status_code == 404


class TestMobileDeStatus:
    """GET /api/v1/vehicles/:id/mobile-de/status tests."""

    @pytest.mark.asyncio
    async def test_status_returns_200_with_no_listing(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles/:id/mobile-de/status returns 200 with pending status when no listing exists."""
        vehicle_id = created_vehicle["id"]
        response = await admin_client.get(f"/api/v1/vehicles/{vehicle_id}/mobile-de/status")
        assert response.status_code == 200
        data = response.json()
        assert data["synced"] is False
        assert data["sync_status"] == "pending"

    @pytest.mark.asyncio
    async def test_status_returns_200_with_synced_listing(self, admin_client, created_vehicle):
        """GET /api/v1/vehicles/:id/mobile-de/status returns 200 with sync info after push."""
        vehicle_id = created_vehicle["id"]
        with patch("app.services.mobilede_service.httpx.AsyncClient") as mock_client_cls:
            mock_response = MagicMock()
            mock_response.status_code = 201
            mock_response.json.return_value = {"id": "mobile-de-ad-456"}
            mock_response.raise_for_status = MagicMock()
            mock_client = AsyncMock()
            mock_client.post = AsyncMock(return_value=mock_response)
            mock_client.__aenter__ = AsyncMock(return_value=mock_client)
            mock_client.__aexit__ = AsyncMock(return_value=None)
            mock_client_cls.return_value = mock_client

            await admin_client.post(f"/api/v1/vehicles/{vehicle_id}/mobile-de/push")

        response = await admin_client.get(f"/api/v1/vehicles/{vehicle_id}/mobile-de/status")
        assert response.status_code == 200
        data = response.json()
        assert data["synced"] is True
        assert data["ad_id"] == "mobile-de-ad-456"
        assert data["synced_at"] is not None

    @pytest.mark.asyncio
    async def test_status_nonexistent_vehicle_returns_404(self, admin_client):
        """GET /api/v1/vehicles/:id/mobile-de/status with nonexistent ID returns 404."""
        fake_id = str(uuid.uuid4())
        response = await admin_client.get(f"/api/v1/vehicles/{fake_id}/mobile-de/status")
        assert response.status_code == 404