"""校验 RBAC 权限号段的一致性（只读，不连数据库）。

## 为什么需要它

权限码的**定义源**是 `tools/seed_test_rbac.py` 的 `PERMISSIONS` 常量 —— 因为那个脚本是
**DELETE 重建**语义：

```
DELETE FROM sys_permission WHERE id BETWEEN 9001 AND 9099
```

任何没并进 `PERMISSIONS` 的权限码，重建一次就没了，表现是"接口突然 403"，
而且**没有任何报错线索**。

2026-09-12 出过一次真实事故：库里有一批 `9020-9035` 是 `grant_advisor_role.py` 用**旧号段**
建的，而投顾线把 `9020-9034` 写进了种子 —— 两套 **id→code 映射不同**。种子的清理只清
`role_id 9001-9003` 的角色绑定，`advisor`(9004) 的绑定**不在清理范围内**，于是重建后
advisor 会静默拿到**语义完全错误**的权限组合（例如 id 9020 从 `asset-allocation:generate:self`
变成 `investment-goal:write:self`），全程不报错。

本脚本把这条约束变成可自动检查的四条：

1. 种子内 id 不重复；
2. 每个 `grant_*.py` 声明的 `(id, code)` 都能在种子里找到**完全一致**的一条；
3. `CUSTOMER_PERMISSIONS` 引用的 id 都存在；
4. 各 `grant_*.py` 之间不抢同一个 id。

`tests/unit/tools/test_rbac_seed_consistency.py` 会调用它，所以这四条是纳入门禁的。

用法：python tools/check_rbac_seed_consistency.py
"""

from __future__ import annotations

import importlib.util
import sys
from pathlib import Path
from types import ModuleType

PROJECT_ROOT = Path(__file__).resolve().parents[1]
if str(PROJECT_ROOT) not in sys.path:
    sys.path.insert(0, str(PROJECT_ROOT))

#: 参与校验的 grant 脚本（都只做「按 code 判重」的幂等补齐）。
GRANT_SCRIPTS: tuple[tuple[str, str, str], ...] = (
    ("tools/grant_advisor_role.py", "ADVISOR_PERMISSIONS", "投顾"),
    ("tools/grant_customer_service_phase2_permissions.py", "PHASE2_PERMISSIONS", "客服二期"),
    ("tools/grant_risk_permissions.py", "PERMISSIONS", "风控"),
)


def _load(name: str, relative: str) -> ModuleType:
    spec = importlib.util.spec_from_file_location(name, PROJECT_ROOT / relative)
    if spec is None or spec.loader is None:
        raise RuntimeError(f"无法加载 {relative}")
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module


def collect_findings() -> list[str]:
    """返回问题列表；空列表表示一致。"""
    problems: list[str] = []

    seed = _load("_rbac_seed", "tools/seed_test_rbac.py")
    seed_map: dict[int, str] = {}
    for row in seed.PERMISSIONS:
        permission_id, code = int(row[0]), str(row[1])
        if permission_id in seed_map:
            problems.append(
                f"种子里 id {permission_id} 重复：{seed_map[permission_id]} 与 {code}"
            )
        seed_map[permission_id] = code

    claimed: dict[int, str] = {}
    for relative, attribute, label in GRANT_SCRIPTS:
        module = _load(f"_rbac_{attribute.lower()}", relative)
        for row in getattr(module, attribute):
            permission_id, code = int(row[0]), str(row[1])
            seeded = seed_map.get(permission_id)
            if seeded is None:
                problems.append(f"{label}（{relative}）：id {permission_id}（{code}）不在种子里")
            elif seeded != code:
                problems.append(
                    f"{label}（{relative}）：id {permission_id} 与种子冲突 —— "
                    f"种子={seeded}，脚本={code}"
                )
            if permission_id in claimed and claimed[permission_id] != code:
                problems.append(
                    f"id {permission_id} 被两个脚本抢用：{claimed[permission_id]} 与 {code}"
                )
            claimed[permission_id] = code

    for permission_id in seed.CUSTOMER_PERMISSIONS:
        if int(permission_id) not in seed_map:
            problems.append(f"CUSTOMER_PERMISSIONS 引用了不存在的 id {permission_id}")

    for permission_id in seed.RISK_PERMISSIONS:
        if int(permission_id) not in seed_map:
            problems.append(f"RISK_PERMISSIONS 引用了不存在的 id {permission_id}")

    required_risk_codes = {
        "risk:alert:read",
        "risk:alert:write",
        "risk:alert:scan",
        "risk:report:mail",
    }
    risk_codes = {
        seed_map[int(permission_id)]
        for permission_id in seed.RISK_PERMISSIONS
        if int(permission_id) in seed_map
    }
    missing_risk_codes = required_risk_codes - risk_codes
    if missing_risk_codes:
        problems.append(
            "RISK_PERMISSIONS 缺少风控权限码："
            + ", ".join(sorted(missing_risk_codes))
        )

    return problems


def main() -> int:
    if hasattr(sys.stdout, "reconfigure"):
        sys.stdout.reconfigure(errors="replace")  # type: ignore[union-attr]

    seed = _load("_rbac_seed_report", "tools/seed_test_rbac.py")
    print(f"种子权限 {len(seed.PERMISSIONS)} 条；grant 脚本 {len(GRANT_SCRIPTS)} 个")

    problems = collect_findings()
    if problems:
        print("\n[失败] 号段不一致：")
        for item in problems:
            print(f"  - {item}")
        print(
            "\n处置：权限码的定义以 tools/seed_test_rbac.py 的 PERMISSIONS 为准；"
            "grant 脚本只补种子里缺的，且 id 必须与种子一致。"
        )
        return 1

    print("一致性检查通过：种子内 id 唯一，各 grant 脚本与种子逐条一致。")
    return 0


if __name__ == "__main__":
    sys.exit(main())