import asyncio

import httpx

from app.controllers.v1.delivery import get_aggregator_service
from app.main import create_app
from app.schemas.order import OrderCreateRequest, OrderCreateResponse
from app.services.aggregator import (
    AggregatorServiceError,
    InvalidOrderCreateRequestError,
)


class StubAggregatorService:
    def __init__(self, *, response: object, error: Exception | None = None) -> None:
        self._response = response
        self._error = error
        self.calls: list[OrderCreateRequest] = []

    async def create_order(self, request: OrderCreateRequest) -> object:
        self.calls.append(request)
        if self._error is not None:
            raise self._error
        return self._response


def _install_service_override(app, service: StubAggregatorService) -> None:
    async def override_service() -> StubAggregatorService:
        return service

    app.dependency_overrides[get_aggregator_service] = override_service


def _valid_payload() -> dict[str, object]:
    return {
        "type": 2,
        "tariff_code": 535,
        "comment": "Test order",
        "sender": {
            "company": "Romashka LLC",
            "name": "Petr Petrov",
            "email": "sender@example.com",
            "phones": [{"number": "+79009876543"}],
        },
        "recipient": {
            "name": "Ivan Ivanov",
            "email": "ivan@example.com",
            "phones": [{"number": "+79001234567"}],
        },
        "from_location": {
            "address": "Lenina 1",
            "city": "Moscow",
            "country_code": "RU",
        },
        "to_location": {
            "address": "Pushkina 10",
            "city": "Novosibirsk",
            "country_code": "RU",
        },
        "services": [{"code": "INSURANCE", "parameter": "1000"}],
        "packages": [
            {
                "number": "1",
                "weight": 1000,
                "length": 20,
                "width": 15,
                "height": 10,
                "comment": "Package 1",
            }
        ],
    }


def test_post_delivery_order_returns_response_and_delegates_to_service() -> None:
    expected_response = OrderCreateResponse(provider="cdek", order_uuid="order-uuid-1")
    service = StubAggregatorService(response=expected_response)
    app = create_app()
    _install_service_override(app, service)

    async def run_request() -> httpx.Response:
        transport = httpx.ASGITransport(app=app)
        async with httpx.AsyncClient(
            transport=transport,
            base_url="http://testserver",
        ) as client:
            return await client.post("/api/v1/delivery/order", json=_valid_payload())

    response = asyncio.run(run_request())

    assert response.status_code == 200
    assert response.json() == expected_response.model_dump(mode="json")
    assert service.calls == [OrderCreateRequest(**_valid_payload())]


def test_post_delivery_order_rejects_invalid_payload() -> None:
    service = StubAggregatorService(response=None)
    app = create_app()
    _install_service_override(app, service)
    invalid_payload = _valid_payload()
    invalid_payload["tariff_code"] = 136

    async def run_request() -> httpx.Response:
        transport = httpx.ASGITransport(app=app)
        async with httpx.AsyncClient(
            transport=transport,
            base_url="http://testserver",
        ) as client:
            return await client.post("/api/v1/delivery/order", json=invalid_payload)

    response = asyncio.run(run_request())

    assert response.status_code == 422
    assert service.calls == []


def test_post_delivery_order_maps_invalid_request_to_400() -> None:
    service = StubAggregatorService(
        response=None,
        error=InvalidOrderCreateRequestError("invalid payload"),
    )
    app = create_app()
    _install_service_override(app, service)

    async def run_request() -> httpx.Response:
        transport = httpx.ASGITransport(app=app, raise_app_exceptions=False)
        async with httpx.AsyncClient(
            transport=transport,
            base_url="http://testserver",
        ) as client:
            return await client.post("/api/v1/delivery/order", json=_valid_payload())

    response = asyncio.run(run_request())

    assert response.status_code == 400
    assert response.json() == {
        "detail": {
            "code": "invalid_order_create_request",
            "message": "Order request contains invalid or unsupported CDEK data.",
        }
    }


def test_post_delivery_order_maps_service_exception_to_503() -> None:
    service = StubAggregatorService(
        response=None,
        error=AggregatorServiceError("service unavailable"),
    )
    app = create_app()
    _install_service_override(app, service)

    async def run_request() -> httpx.Response:
        transport = httpx.ASGITransport(app=app, raise_app_exceptions=False)
        async with httpx.AsyncClient(
            transport=transport,
            base_url="http://testserver",
        ) as client:
            return await client.post("/api/v1/delivery/order", json=_valid_payload())

    response = asyncio.run(run_request())

    assert response.status_code == 503
    assert response.json() == {
        "detail": {
            "code": "order_creation_unavailable",
            "message": "CDEK order creation is temporarily unavailable.",
        }
    }