"""`AdminService` 权限映射契约测试（不连数据库）。

管理面的权限判定是纯映射逻辑，但它决定"谁能改配置、谁能激活发布"。测试手法：把
`AuthorizationService.require` 换成记录器并**立刻抛错**，流程就在闸门处停下——
既能断言传进去的权限码与 `admin` 标志，又不需要构造 session 与 repository。

覆盖的分支：
- `query`：审计资源用 `audit:read`，其余用 `config:read`，且一律要求 admin 身份；
- `mutate`：模型端点用 `model-endpoint:manage`，其余用 `config:write`；
  `reviews` 提升为 `config:review`；`activations`/`rollbacks` **仅当资源是
  `config-releases` 时**才提升为 `config:activate`；
- 边界：`model-endpoints` 下的 `activations` 不应被提升为 `config:activate`
  （否则模型端点的激活会绕过配置发布的激活语义）。
"""

from typing import Any

import pytest

from app.core.contracts import RequestContext
from app.core.errors import ForbiddenAgentError
from app.service.admin_service import AdminService

CONTEXT = RequestContext(user_id="9003", trace_id="trace-1", roles=("admin",))
KEY = "k" * 16


def recording_auth(captured: list[tuple[str, bool]]) -> type:
    class RecordingAuth:
        @staticmethod
        async def require(
            context: RequestContext, permission: str, *, admin: bool = False
        ) -> None:
            del context
            captured.append((permission, admin))
            raise ForbiddenAgentError("stop at gate")

    return RecordingAuth


def service() -> AdminService:
    """绕过 __init__：本测试只验证权限映射，不涉及依赖装配。"""
    return AdminService.__new__(AdminService)


async def record_query(monkeypatch: pytest.MonkeyPatch, resource: str) -> list[tuple[str, bool]]:
    captured: list[tuple[str, bool]] = []
    monkeypatch.setattr("app.service.admin_service.AuthorizationService", recording_auth(captured))
    with pytest.raises(ForbiddenAgentError):
        await service().query(resource, CONTEXT)
    return captured


async def record_mutate(
    monkeypatch: pytest.MonkeyPatch, resource: str, action: str
) -> list[tuple[str, bool]]:
    captured: list[tuple[str, bool]] = []
    monkeypatch.setattr("app.service.admin_service.AuthorizationService", recording_auth(captured))
    with pytest.raises(ForbiddenAgentError):
        await service().mutate(resource, CONTEXT, {}, KEY, None, action=action)
    return captured


@pytest.mark.parametrize(
    ("resource", "expected"),
    [
        ("audit-records", "audit:read"),
        ("config-releases", "config:read"),
        ("negative-word-rules", "config:read"),
    ],
)
async def test_query_permission_mapping(
    monkeypatch: pytest.MonkeyPatch, resource: str, expected: str
) -> None:
    captured = await record_query(monkeypatch, resource)

    assert captured == [(expected, True)]


@pytest.mark.parametrize(
    ("resource", "action", "expected"),
    [
        ("config-releases", "write", "config:write"),
        ("model-endpoints", "write", "model-endpoint:manage"),
        ("config-releases", "reviews", "config:review"),
        ("model-endpoints", "reviews", "config:review"),
        ("config-releases", "activations", "config:activate"),
        ("config-releases", "rollbacks", "config:activate"),
        # 边界：模型端点的激活不提升为 config:activate，仍走端点管理权限。
        ("model-endpoints", "activations", "model-endpoint:manage"),
        ("negative-word-rules", "activations", "config:write"),
    ],
)
async def test_mutate_permission_mapping(
    monkeypatch: pytest.MonkeyPatch, resource: str, action: str, expected: str
) -> None:
    captured = await record_mutate(monkeypatch, resource, action)

    assert captured == [(expected, True)]


async def test_gate_is_called_before_any_database_work(monkeypatch: pytest.MonkeyPatch) -> None:
    """闸门必须早于任何数据库访问：这里用"创建会话即报错"的替身证明。"""
    captured: list[tuple[str, bool]] = []
    monkeypatch.setattr("app.service.admin_service.AuthorizationService", recording_auth(captured))

    def exploding_factory() -> Any:
        raise AssertionError("权限校验未通过时不应创建数据库会话")

    monkeypatch.setattr("app.service.admin_service.SessionFactory", exploding_factory)

    with pytest.raises(ForbiddenAgentError):
        await service().query("config-releases", CONTEXT)

    assert captured == [("config:read", True)]