"""Hub decision write-back behind INFD_HUB_WRITEBACK (INFD-WP-0005-T03). Offline."""
import pytest

from informed_decision.hub_writeback import Answer, build_resolution, write_back

D1 = "62aa95e4-3ccc-4867-8806-5e3db005b483"
BASE = "http://hub.test"
ON = {"INFD_HUB_WRITEBACK": "1"}


def answer(**kw):
    data = dict(memo_id="infd-20261003-p01", memo_version=1, verb="accept", disposition_id="disp-1",
                decided_at="2026-10-03T12:00:00Z", reviewer_display="Bernd Worsch",
                approval_id="ba5ce2d8-8b6d-40be-af89-2e8c147029a3",
                approval_binding_digest="sha256:" + "a" * 64, view_hash="sha256:" + "b" * 64)
    data.update(kw)
    return Answer(**data)


class Hub:
    def __init__(self, *responses):
        self.responses = list(responses)
        self.calls = []

    def __call__(self, method, url, body):
        self.calls.append((method, url, body))
        return self.responses.pop(0)


def test_rationale_carries_memo_id_and_pins():
    payload = build_resolution(answer())
    assert "memo infd-20261003-p01 v1" in payload["rationale"]
    assert "approval ba5ce2d8" in payload["rationale"]
    assert payload["decided_by"] == "Bernd Worsch via informed-decision"


def test_agents_cannot_resolve():
    with pytest.raises(ValueError):
        build_resolution(answer(actor_kind="agent"))


def test_flag_off_builds_but_does_not_send():
    hub = Hub()
    out = write_back(answer(), {"hub_decision_id": D1, "resolves": "on-answer"}, base_url=BASE,
                     transport=hub, env={})
    assert out.status == "skipped" and out.payload and hub.calls == []


@pytest.mark.parametrize("verb,serves", [
    ("return", {"hub_decision_id": D1, "resolves": "on-answer"}),
    ("discuss", {"hub_decision_id": D1, "resolves": "on-answer"}),
    ("accept", {"hub_decision_id": D1, "resolves": "never"}),
    ("accept", None),
])
def test_not_applicable(verb, serves):
    hub = Hub()
    out = write_back(answer(verb=verb), serves, base_url=BASE, transport=hub, env=ON)
    assert out.status == "not_applicable" and hub.calls == []


def test_resolves_when_on():
    hub = Hub((200, {"id": D1, "status": "resolved"}))
    out = write_back(answer(verb="decline"), {"hub_decision_id": D1, "resolves": "on-answer"},
                     base_url=BASE, transport=hub, env=ON)
    assert out.status == "resolved"
    assert hub.calls[0][:2] == ("POST", f"{BASE}/decisions/{D1}/resolve")


def test_409_is_idempotent_only_for_our_memo():
    ours = Hub((409, {}), (200, {"rationale": "accept in informed-decision memo infd-20261003-p01 v1; ..."}))
    assert write_back(answer(), {"hub_decision_id": D1, "resolves": "on-answer"}, base_url=BASE,
                      transport=ours, env=ON).status == "already_resolved"
    theirs = Hub((409, {}), (200, {"rationale": "resolved by hand"}))
    assert write_back(answer(), {"hub_decision_id": D1, "resolves": "on-answer"}, base_url=BASE,
                      transport=theirs, env=ON).status == "conflict"


def test_transport_error_is_failed_not_raised():
    def broken(*_):
        raise ConnectionRefusedError()
    out = write_back(answer(), {"hub_decision_id": D1, "resolves": "on-answer"}, base_url=BASE,
                     transport=broken, env=ON)
    assert out.status == "failed"


def test_bad_decision_id_refused():
    with pytest.raises(ValueError):
        write_back(answer(), {"hub_decision_id": "D1", "resolves": "on-answer"}, base_url=BASE,
                   transport=Hub(), env=ON)


@pytest.mark.parametrize('read_status,body', [(503, {}), (404, {}), (200, {}), (200, None)])
def test_unreadable_conflict_remains_retryable(read_status, body):
    hub = Hub((409, {}), (read_status, body))
    assert write_back(answer(), {'hub_decision_id': D1, 'resolves': 'on-answer'},
                      base_url=BASE, transport=hub, env=ON).status == 'failed'