#  Copyright 2026 zhaoxi826
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

from fastapi import APIRouter
from fastapi import Depends
from pydantic import BaseModel
from pretor.utils.access import Accessor, TokenData
from fastapi.concurrency import run_in_threadpool
from pretor.utils.ray_hook import ray_actor_hook
from pretor.utils.check_user.role_check import RoleChecker
from pretor.core.database.table.user import UserAuthority
from pretor.utils.error import UserNotExistError

auth_router = APIRouter(prefix="/api/v1/auth", tags=["auth"])


class UserRegister(BaseModel):
    """UserRegister 核心组件类。
    这是一个领域数据模型或功能封装类，承载了 UserRegister 相关的内聚属性定义与状态维护。它的存在隔离了局部的业务复杂性，并对外提供了类型安全的访问接口。"""

    user_name: str
    password: str


@auth_router.post("/register")
async def create_user(user_register: UserRegister):
    """处理针对 create user 相关的 HTTP API 请求。
    该接口负责解析前端传入的载荷数据，调用底层核心业务逻辑进行处理，并组装标准化的 JSON 响应。
    Args:        user_register (UserRegister): 参与 create user 逻辑运算或数据构建的上下文依赖对象。
    Returns:        : 序列化后的标准网络响应模型（如包含业务状态码、成功标志及对应的数据载荷 Data）。"""
    postgres_database = ray_actor_hook("postgres_database").postgres_database
    hashed_password = await run_in_threadpool(
        Accessor.hash_password, user_register.password
    )
    user = await postgres_database.add_user.remote(
        user_register.user_name, hashed_password
    )
    return {"message": "success", "user_id": user.user_id}


class UserLogin(BaseModel):
    """UserLogin 核心组件类。
    这是一个领域数据模型或功能封装类，承载了 UserLogin 相关的内聚属性定义与状态维护。它的存在隔离了局部的业务复杂性，并对外提供了类型安全的访问接口。"""

    user_name: str
    password: str


@auth_router.post("/login")
async def login_user(user_login: UserLogin):
    """处理针对 login user 相关的 HTTP API 请求。
    该接口负责解析前端传入的载荷数据，调用底层核心业务逻辑进行处理，并组装标准化的 JSON 响应。
    Args:        user_login (UserLogin): 参与 login user 逻辑运算或数据构建的上下文依赖对象。
    Returns:        : 序列化后的标准网络响应模型（如包含业务状态码、成功标志及对应的数据载荷 Data）。"""
    postgres_database = ray_actor_hook("postgres_database").postgres_database
    user = await postgres_database.login_user.remote(user_login.user_name)
    if not user:
        raise UserNotExistError()
    token = await run_in_threadpool(
        Accessor.login_hashed_password, user, user_login.password
    )
    return {"message": "success", "token": token}


class ChangeAuthorityRequest(BaseModel):
    """ChangeAuthorityRequest 核心组件类。
    这是一个领域数据模型或功能封装类，承载了 ChangeAuthorityRequest 相关的内聚属性定义与状态维护。它的存在隔离了局部的业务复杂性，并对外提供了类型安全的访问接口。"""

    user_id: str
    new_authority: UserAuthority


@auth_router.put("/authority")
async def change_authority(
    request: ChangeAuthorityRequest,
    _: TokenData = Depends(
        RoleChecker(allowed_roles=UserAuthority.SUPER_ADMINISTRATOR)
    ),
):
    """
    Update a user's authority level. Only accessible by SUPER_ADMINISTRATOR.
    """
    postgres_database = ray_actor_hook("postgres_database").postgres_database
    user = await postgres_database.change_user_authority.remote(
        user_id=request.user_id, new_authority=request.new_authority
    )
    return {
        "message": "success",
        "user_id": user.user_id,
        "new_authority": user.user_authority,
    }


@auth_router.get("/list")
async def get_user_list(
    _: TokenData = Depends(
        RoleChecker(allowed_roles=UserAuthority.SUPER_ADMINISTRATOR)
    ),
):
    """
    Get a list of all users. Only accessible by SUPER_ADMINISTRATOR.
    """
    postgres_database = ray_actor_hook("postgres_database").postgres_database
    users = await postgres_database.get_all_users.remote()
    return {
        "users": [
            {"user_id": u.user_id, "user_name": u.user_name, "role": u.user_authority}
            for u in users
        ]
    }


@auth_router.delete("/{user_id}")
async def delete_user(
    user_id: str,
    _: TokenData = Depends(
        RoleChecker(allowed_roles=UserAuthority.SUPER_ADMINISTRATOR)
    ),
):
    """
    Delete a user. Only accessible by SUPER_ADMINISTRATOR.
    """
    postgres_database = ray_actor_hook("postgres_database").postgres_database
    await postgres_database.delete_user_by_id.remote(user_id=user_id)
    return {"message": "success"}