"""菜单 code 权限守卫（V0.3：通过 sys_user_role → sys_role_menu → sys_menu.perms）"""
from typing import Any, Callable, Dict, Iterable, Set

from fastapi import Depends, HTTPException
from sqlalchemy.orm import Session

from app.core.auth import get_current_user
from app.core.database import get_db
from app.models.models import SysUser
from app.services.web_auth_roles import iter_user_menu_perm_codes

ADMIN_ROLES = {"admin", "super_admin"}
SUPER_ADMIN_ROLE = "super_admin"


def require_admin_or_super_admin(current_user: dict = Depends(get_current_user)):
    """运营端角色守卫：admin / super_admin 可访问。"""
    role = current_user.get("role")
    if role not in ADMIN_ROLES:
        raise HTTPException(status_code=403, detail="需要运营人员权限")
    return current_user


def get_user_menu_codes(db: Session, user_id: str) -> Set[str]:
    """读取用户授权的菜单权限标识集合（与前端 meta.menuCode / perms 对齐）。"""
    return iter_user_menu_perm_codes(db, user_id or "")


def user_has_menu_perm(db: Session, user: dict, perm_code: str) -> bool:
    """判断用户是否拥有指定权限码（不拦截请求，用于字段/按钮级能力控制）。"""
    code = (perm_code or "").strip()
    if not code:
        return False
    if user.get("role") == SUPER_ADMIN_ROLE:
        return True
    user_id = (user.get("user_id") or "").strip()
    if not user_id:
        return False
    return code in get_user_menu_codes(db, user_id)


def strip_row_fields(rows: Iterable[Dict[str, Any]], *field_names: str) -> None:
    """从响应行中移除敏感字段（原地修改）。"""
    keys = [k for k in field_names if k]
    if not keys:
        return
    for row in rows:
        for key in keys:
            row.pop(key, None)


def require_menu_code(menu_code: str) -> Callable:
    """接口菜单权限守卫（已统一放行 menuCode 校验，仅保留运营端登录）。"""
    _ = menu_code  # 保留参数以兼容各路由 Depends(require_menu_code("..."))
    return require_admin_or_super_admin


def require_any_menu_code(*menu_codes: str) -> Callable:
    """接口菜单权限守卫（已统一放行 menuCode 校验，仅保留运营端登录）。"""
    _ = menu_codes
    return require_admin_or_super_admin


def _strict_user_identity(db: Session, user: dict) -> tuple[str, str]:
    """从用户表读取当前租户，拒绝信任 JWT/请求中的租户覆盖。"""
    user_id = str((user or {}).get("user_id") or "").strip()
    if not user_id:
        return "", ""
    row = (
        db.query(SysUser.id, SysUser.tenant_no)
        .filter(
            SysUser.id == user_id,
            SysUser.del_flag == 0,
            SysUser.status == "1",
        )
        .first()
    )
    if not row:
        return "", ""
    return str(row[0] or "").strip(), str(row[1] or "").strip()


def strict_user_has_any_menu_perm(
    db: Session,
    user: dict,
    menu_codes: Iterable[str],
) -> bool:
    """按用户真实租户严格判断任一菜单权限，含直接与职位继承角色。"""
    required = {
        str(code or "").strip() for code in menu_codes if str(code or "").strip()
    }
    if not required:
        return False
    user_id, tenant_no = _strict_user_identity(db, user)
    if not user_id or not tenant_no:
        return False
    granted = iter_user_menu_perm_codes(db, user_id, tenant_no=tenant_no)
    return bool(required.intersection(granted))


def strict_user_has_menu_perm(db: Session, user: dict, menu_code: str) -> bool:
    """按用户真实租户严格判断单个菜单权限。"""
    return strict_user_has_any_menu_perm(db, user, (menu_code,))


def assert_strict_menu_code(
    db: Session,
    user: dict,
    menu_code: str,
) -> None:
    """路由内部字段级权限断言。"""
    if not strict_user_has_menu_perm(db, user, menu_code):
        raise HTTPException(status_code=403, detail="无对应菜单权限")


def require_strict_menu_code(menu_code: str) -> Callable:
    """租户化的精确菜单权限依赖；与历史宽松守卫并存。"""
    required = str(menu_code or "").strip()

    async def dependency(
        user: dict = Depends(get_current_user),
        db: Session = Depends(get_db),
    ) -> dict:
        assert_strict_menu_code(db, user, required)
        return user

    dependency.strict_menu_codes = (required,)
    return dependency


def require_strict_any_menu_code(*menu_codes: str) -> Callable:
    """租户化的任一菜单权限依赖。"""
    required = tuple(
        dict.fromkeys(
            str(code or "").strip()
            for code in menu_codes
            if str(code or "").strip()
        )
    )

    async def dependency(
        user: dict = Depends(get_current_user),
        db: Session = Depends(get_db),
    ) -> dict:
        if not strict_user_has_any_menu_perm(db, user, required):
            raise HTTPException(status_code=403, detail="无对应菜单权限")
        return user

    dependency.strict_menu_codes = required
    return dependency