"""admin 运营配置:列出所有可配项 + 改某项(带审计 + 改值校验)。

配置项定义见 app.core.config_schema.CONFIG_DEFS;业务读配置 fallback 默认(见 app_config repo)。
权限:operator / finance 都可改(运营调奖励、财务调额度),super 恒可。
"""
from __future__ import annotations

from typing import Annotated, Any

from fastapi import APIRouter, Depends, HTTPException, Request

from app.admin.audit import write_audit
from app.admin.deps import AdminDb, get_client_ip, get_current_admin, require_role
from app.admin.schemas.config import ConfigItemOut, ConfigUpdateRequest
from app.core.config_schema import CONFIG_DEFS
from app.models.admin import AdminUser
from app.repositories import app_config

router = APIRouter(
    prefix="/admin/api/config",
    tags=["admin-config"],
    dependencies=[Depends(get_current_admin)],
)


def _validate(key: str, value: Any) -> None:
    """按配置项 type 校验新值,不合法抛 ValueError(router 转 400)。"""
    t = CONFIG_DEFS[key]["type"]
    if t == "int":
        if not isinstance(value, int) or isinstance(value, bool) or value < 0:
            raise ValueError("需为非负整数")
    elif t == "int_list":
        if not isinstance(value, list) or not value:
            raise ValueError("需为非空整数列表")
        if not all(isinstance(x, int) and not isinstance(x, bool) and x >= 0 for x in value):
            raise ValueError("列表元素需为非负整数")
        if key == "signin_rewards" and len(value) != 14:
            raise ValueError("签到档位必须正好 14 个(对应 14 天循环)")
    elif t == "dict_str_int":
        if not isinstance(value, dict) or not all(
            isinstance(k, str) and isinstance(v, int) and not isinstance(v, bool)
            for k, v in value.items()
        ):
            raise ValueError("需为 {字符串: 整数} 映射")


def _item(db, key: str) -> ConfigItemOut:
    for item in app_config.list_all(db):
        if item["key"] == key:
            return ConfigItemOut(**item)
    raise HTTPException(status_code=404, detail="未知配置项")


@router.get("", response_model=list[ConfigItemOut], summary="所有可配项 + 当前值")
def list_config(db: AdminDb) -> list[ConfigItemOut]:
    return [ConfigItemOut(**item) for item in app_config.list_all(db)]


@router.patch("/{key}", response_model=ConfigItemOut, summary="改某项配置(带审计)")
def update_config(
    key: str,
    body: ConfigUpdateRequest,
    request: Request,
    admin: Annotated[AdminUser, Depends(require_role("operator", "finance"))],
    db: AdminDb,
) -> ConfigItemOut:
    if key not in CONFIG_DEFS:
        raise HTTPException(status_code=404, detail="未知配置项")
    try:
        _validate(key, body.value)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e)) from e

    before = app_config.get_value(db, key)
    app_config.set_value(db, key, body.value, admin_id=admin.id, commit=False)
    write_audit(
        db, admin, action="config.set", target_type="config", target_id=key,
        detail={"before": before, "after": body.value}, ip=get_client_ip(request), commit=False,
    )
    db.commit()
    return _item(db, key)