from collections.abc import Sequence

from fastapi.testclient import TestClient

from app.ha.exceptions import HaTimeoutError
from app.ha.models import HaEntitySummary
from app.ha.reader import HaReader
from app.main import app


class FakeHaReader(HaReader):
    def __init__(self) -> None:
        pass

    def read_entities(self) -> Sequence[HaEntitySummary]:
        return [HaEntitySummary(entity_id="sensor.temperature", domain="sensor")]


class TimeoutHaReader(HaReader):
    def __init__(self) -> None:
        pass

    def read_entities(self) -> Sequence[HaEntitySummary]:
        raise HaTimeoutError("contains internal details that must not leak")


def test_openapi_docs_are_available() -> None:
    with TestClient(app) as client:
        response = client.get("/docs")
    assert response.status_code == 200
    assert "SillyHome Next API" in response.text


def test_entities_returns_reader_data() -> None:
    with TestClient(app) as client:
        app.state.ha_reader = FakeHaReader()
        response = client.get("/v1/entities")
    assert response.status_code == 200
    assert response.json() == [
        {
            "entity_id": "sensor.temperature",
            "domain": "sensor",
            "state_class": None,
            "device_class": None,
            "unit_of_measurement": None,
        }
    ]


def test_entities_returns_503_without_home_assistant_config() -> None:
    with TestClient(app) as client:
        response = client.get("/v1/entities")
    assert response.status_code == 503


def test_entities_maps_ha_errors_without_leaking_details() -> None:
    with TestClient(app) as client:
        app.state.ha_reader = TimeoutHaReader()
        response = client.get("/v1/entities")
    assert response.status_code == 504
    assert response.json() == {"detail": "Home Assistant request timed out."}