from __future__ import annotations

from types import SimpleNamespace

import httpx

from ariadne.services import metis as metis_module


class DummyResponse:
    def __init__(self, status_code: int = 200, payload: object | None = None) -> None:
        self.status_code = status_code
        self._payload = payload

    def raise_for_status(self) -> None:
        if self.status_code >= 400:
            request = httpx.Request("POST", "http://example.test")
            raise httpx.HTTPStatusError("boom", request=request, response=self)

    def json(self):
        if isinstance(self._payload, Exception):
            raise self._payload
        return self._payload


class DummyClient:
    def __init__(self, response: DummyResponse) -> None:
        self.response = response
        self.calls: list[str] = []
        self.kwargs = None

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc, tb):
        return False

    def post(self, url: str):
        self.calls.append(url)
        return self.response


def test_watch_sentinel_posts_to_derived_url(monkeypatch) -> None:
    dummy = SimpleNamespace(
        metis_base_url="http://metis.maintenance.svc.cluster.local",
        metis_watch_url="",
        metis_timeout_sec=12.5,
    )
    monkeypatch.setattr("ariadne.services.metis.settings", dummy)
    client = DummyClient(DummyResponse(payload={"status": "ok", "detail": "watched", "nodes": 21}))
    captured: dict[str, object] = {}

    def factory(**kwargs):
        captured.update(kwargs)
        return client

    monkeypatch.setattr(metis_module.httpx, "Client", factory)

    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "ok"
    assert summary.watch_url == "http://metis.maintenance.svc.cluster.local/internal/sentinel/watch"
    assert summary.detail == "watched"
    assert summary.result["nodes"] == 21
    assert client.calls == [summary.watch_url]
    assert captured["timeout"] == 12.5


def test_watch_sentinel_uses_explicit_url(monkeypatch) -> None:
    dummy = SimpleNamespace(
        metis_base_url="http://metis.maintenance.svc.cluster.local",
        metis_watch_url="http://metis.example/internal/sentinel/watch",
        metis_timeout_sec=10.0,
    )
    monkeypatch.setattr("ariadne.services.metis.settings", dummy)
    client = DummyClient(DummyResponse(payload={"status": "ok"}))
    monkeypatch.setattr(metis_module.httpx, "Client", lambda **kwargs: client)

    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "ok"
    assert summary.watch_url == "http://metis.example/internal/sentinel/watch"
    assert client.calls == [summary.watch_url]


def test_watch_sentinel_skips_when_unconfigured(monkeypatch) -> None:
    monkeypatch.setattr(
        "ariadne.services.metis.settings",
        SimpleNamespace(metis_base_url="", metis_watch_url="", metis_timeout_sec=10.0),
    )

    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "skipped"
    assert summary.watch_url == ""
    assert summary.detail == "metis watch url not configured"


def test_watch_sentinel_handles_http_error(monkeypatch) -> None:
    dummy = SimpleNamespace(
        metis_base_url="http://metis.maintenance.svc.cluster.local",
        metis_watch_url="",
        metis_timeout_sec=10.0,
    )
    monkeypatch.setattr("ariadne.services.metis.settings", dummy)
    client = DummyClient(DummyResponse(status_code=502, payload={"detail": "upstream fail"}))
    monkeypatch.setattr(metis_module.httpx, "Client", lambda **kwargs: client)

    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "error"
    assert summary.detail == "upstream fail"
    assert summary.result["detail"] == "upstream fail"


def test_normalize_payload_and_ready(monkeypatch) -> None:
    monkeypatch.setattr(
        "ariadne.services.metis.settings",
        SimpleNamespace(metis_base_url="http://metis", metis_watch_url="", metis_timeout_sec=10.0),
    )
    service = metis_module.MetisService()

    assert service.ready() is True
    assert metis_module._normalize_payload(None) == {}
    assert metis_module._normalize_payload(["watched"]) == {"result": ["watched"]}

    monkeypatch.setattr(
        "ariadne.services.metis.settings",
        SimpleNamespace(metis_base_url="", metis_watch_url="", metis_timeout_sec=10.0),
    )
    assert service.ready() is False


def test_watch_sentinel_handles_non_json_success(monkeypatch) -> None:
    monkeypatch.setattr(
        "ariadne.services.metis.settings",
        SimpleNamespace(metis_base_url="http://metis", metis_watch_url="", metis_timeout_sec=10.0),
    )
    client = DummyClient(DummyResponse(payload=ValueError("not json")))
    monkeypatch.setattr(metis_module.httpx, "Client", lambda **kwargs: client)

    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "ok"
    assert summary.result == {}


def test_watch_sentinel_handles_http_error_without_json(monkeypatch) -> None:
    monkeypatch.setattr(
        "ariadne.services.metis.settings",
        SimpleNamespace(metis_base_url="http://metis", metis_watch_url="", metis_timeout_sec=10.0),
    )
    client = DummyClient(DummyResponse(status_code=503, payload=ValueError("not json")))
    monkeypatch.setattr(metis_module.httpx, "Client", lambda **kwargs: client)

    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "error"
    assert summary.detail == "metis watch failed with HTTP 503"


def test_watch_sentinel_handles_client_exception(monkeypatch) -> None:
    monkeypatch.setattr(
        "ariadne.services.metis.settings",
        SimpleNamespace(metis_base_url="http://metis", metis_watch_url="", metis_timeout_sec=10.0),
    )

    class FailingClient:
        def __enter__(self):
            raise RuntimeError("network down")

        def __exit__(self, exc_type, exc, tb):
            return False

    monkeypatch.setattr(metis_module.httpx, "Client", lambda **kwargs: FailingClient())

    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "error"
    assert summary.detail == "network down"


def test_watch_sentinel_normalizes_message_and_unknown_status(monkeypatch) -> None:
    monkeypatch.setattr(
        "ariadne.services.metis.settings",
        SimpleNamespace(metis_base_url="http://metis", metis_watch_url="", metis_timeout_sec=10.0),
    )
    client = DummyClient(DummyResponse(payload={"status": "warning", "message": " watched with warnings "}))
    monkeypatch.setattr(metis_module.httpx, "Client", lambda **kwargs: client)

    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "ok"
    assert summary.detail == "watched with warnings"

    client.response = DummyResponse(payload={"status": "paused"})
    summary = metis_module.MetisService().watch_sentinel()

    assert summary.status == "ok"
    assert summary.detail == "metis watch returned paused"