from types import SimpleNamespace

import pytest
from fastapi import HTTPException

from app.api.sstc_api import charters_ai_alignment as charters_ai_alignment_api
from app.api.sstc_api import releases_status_generate as releases_status_generate_api


@pytest.mark.asyncio
async def test_confirm_alignment_blocks_when_charter_readiness_is_not_ready(monkeypatch) -> None:
    async def _fake_ensure_project(service, project_id):
        _ = (service, project_id)
        return SimpleNamespace(id=6)

    async def _fake_ensure_charter(db, *, tenant_id: int, project_id: int, charter_id: int):
        _ = (db, tenant_id, project_id, charter_id)
        return SimpleNamespace(
            id=55,
            title="内部知识库升级宪章",
            status="aligning",
            content={
                "readiness": {
                    "ready_for_confirm": False,
                    "blocking_fields": ["module_1.kpis", "module_2.alignment_qa"],
                    "blocking_reasons": ["关键 KPI 缺少证据", "固定对齐问答未完成"],
                }
            },
        )

    class _FakeResult:
        def scalar_one_or_none(self):
            return None

        def scalars(self):
            return self

        def all(self):
            return []

    class _FakeDB:
        async def execute(self, stmt):
            _ = stmt
            return _FakeResult()

        def add(self, value):
            _ = value
            return None

        async def commit(self):
            raise AssertionError("readiness blocked charters must not commit confirmation")

    monkeypatch.setattr(charters_ai_alignment_api, "_ensure_project", _fake_ensure_project)
    monkeypatch.setattr(charters_ai_alignment_api, "_ensure_charter", _fake_ensure_charter)

    with pytest.raises(HTTPException) as exc_info:
        await charters_ai_alignment_api.confirm_alignment(
            project_id="6",
            charter_id="55",
            body=SimpleNamespace(score=90, confirmed=True, comments="已确认对齐"),
            db=_FakeDB(),
            current_user=SimpleNamespace(tenant_id=1, id=7),
            permission_user=SimpleNamespace(),
        )

    assert exc_info.value.status_code == 409
    assert "关键 KPI 缺少证据" in str(exc_info.value.detail)
    assert "module_1.kpis" in str(exc_info.value.detail)


@pytest.mark.asyncio
async def test_generate_release_verification_uses_charter_verification_metrics(monkeypatch) -> None:
    async def _fake_ensure_project(service, project_id):
        _ = (service, project_id)
        return SimpleNamespace(id=6)

    async def _fake_ensure_release(db, *, tenant_id: int, project_id: int, release_node_id: int):
        _ = (db, tenant_id, project_id, release_node_id)
        return SimpleNamespace(
            id=88,
            status="pending",
            content={"charter_id": 55},
        )

    async def _fake_ensure_charter(db, *, tenant_id: int, project_id: int, charter_id: int):
        _ = (db, tenant_id, project_id, charter_id)
        return SimpleNamespace(
            id=55,
            content={
                "derived_artifacts": {
                    "verification_metrics": [
                        {"name": "首响低于 3 秒", "expected": "P95 <= 3s"},
                        {"name": "重复提问率下降", "expected": "下降 20%+"},
                    ]
                },
                "success_metrics": ["不应回退到这里"],
            },
        )

    class _FakeDB:
        def __init__(self):
            self.committed = False

        async def commit(self):
            self.committed = True

    monkeypatch.setattr(releases_status_generate_api, "_ensure_project", _fake_ensure_project)
    monkeypatch.setattr(releases_status_generate_api, "_ensure_release", _fake_ensure_release)
    monkeypatch.setattr(releases_status_generate_api, "_ensure_charter", _fake_ensure_charter)

    db = _FakeDB()
    response = await releases_status_generate_api.generate_release_verification(
        project_id="6",
        release_node_id="88",
        db=db,
        current_user=SimpleNamespace(tenant_id=1, id=7, role="REVIEWER"),
        permission_user=SimpleNamespace(),
    )

    payload = response["data"]
    assert db.committed is True
    assert payload["verification_items"][0]["title"] == "首响低于 3 秒"
    assert payload["verification_items"][0]["expected"] == "P95 <= 3s"
    assert payload["verification_items"][0]["source"] == "charter_verification_metric"


@pytest.mark.asyncio
async def test_generate_release_verification_fails_without_charter_metrics(monkeypatch) -> None:
    async def _fake_ensure_project(service, project_id):
        _ = (service, project_id)
        return SimpleNamespace(id=6)

    async def _fake_ensure_release(db, *, tenant_id: int, project_id: int, release_node_id: int):
        _ = (db, tenant_id, project_id, release_node_id)
        return SimpleNamespace(
            id=88,
            status="pending",
            content={"charter_id": 55},
        )

    async def _fake_ensure_charter(db, *, tenant_id: int, project_id: int, charter_id: int):
        _ = (db, tenant_id, project_id, charter_id)
        return SimpleNamespace(
            id=55,
            content={
                "derived_artifacts": {"verification_metrics": []},
                "success_metrics": [],
                "core_metrics": [],
            },
        )

    class _FakeDB:
        async def commit(self):
            raise AssertionError("missing metrics must not commit verification items")

    monkeypatch.setattr(releases_status_generate_api, "_ensure_project", _fake_ensure_project)
    monkeypatch.setattr(releases_status_generate_api, "_ensure_release", _fake_ensure_release)
    monkeypatch.setattr(releases_status_generate_api, "_ensure_charter", _fake_ensure_charter)

    with pytest.raises(HTTPException) as exc_info:
        await releases_status_generate_api.generate_release_verification(
            project_id="6",
            release_node_id="88",
            db=_FakeDB(),
            current_user=SimpleNamespace(tenant_id=1, id=7, role="REVIEWER"),
            permission_user=SimpleNamespace(),
        )

    assert exc_info.value.status_code == 409
    assert "verification metrics" in str(exc_info.value.detail).lower()