"""接口级权限管理API"""

from __future__ import annotations

import uuid
from typing import Annotated

from fastapi import APIRouter, Depends, status
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.deps import get_db_session, require_study_roles
from app.core.project_permissions import (
    get_api_endpoint_permissions,
    replace_api_endpoint_permissions,
)
from app.models.api_endpoint_registry import ApiEndpointRegistry
from app.core.api_permissions import API_ENDPOINT_PERMISSIONS, PROJECT_PERMISSION_ROLES

router = APIRouter(prefix="/api-permissions", tags=["api-permissions"])


@router.get(
    "/endpoints",
    summary="获取系统中所有已注册的API端点",
    description="返回系统中所有已注册的API端点及其元数据",
)
async def list_api_endpoints(
    db: Annotated[AsyncSession, Depends(get_db_session)],
) -> dict[str, list[dict]]:
    """获取所有已注册的API端点"""
    result = await db.execute(select(ApiEndpointRegistry))
    endpoints = result.scalars().all()

    endpoints_list = [
        {
            "endpoint_key": ep.endpoint_key,
            "method": ep.method,
            "path": ep.path,
            "module": ep.module,
            "action": ep.action,
            "description": ep.description,
            "default_roles": ep.default_roles.split(",") if ep.default_roles else [],
        }
        for ep in endpoints
    ]

    return {"endpoints": endpoints_list}


@router.get(
    "",
    summary="获取项目的接口级权限矩阵",
    description="返回项目中各角色对API端点的权限配置",
    response_model=None,
)
async def get_study_api_permissions(
    study_id: uuid.UUID,
    _=Depends(require_study_roles(["PM"])),
    db: Annotated[AsyncSession, Depends(get_db_session)] = None,
):
    """获取项目的接口级权限矩阵

    返回格式:
    {
        "role": {
            "endpoint_key": {
                "allowed": true/false
            }
        }
    }
    """
    permissions = await get_api_endpoint_permissions(db, study_id)

    # 构建返回格式
    result: dict[str, dict[str, dict[str, bool]]] = {}
    for role in PROJECT_PERMISSION_ROLES:
        if role == "ADMIN":
            continue
        result[role] = {}
        for endpoint_key in API_ENDPOINT_PERMISSIONS.keys():
            result[role][endpoint_key] = {
                "allowed": permissions.get(role, {}).get(endpoint_key, False)
            }

    return result


@router.put(
    "",
    summary="更新项目的接口级权限矩阵",
    description="批量更新项目中各角色对API端点的权限配置",
    status_code=status.HTTP_200_OK,
    response_model=None,
)
async def update_study_api_permissions(
    study_id: uuid.UUID,
    payload: dict[str, dict[str, bool]],
    _=Depends(require_study_roles(["PM"])),
    db: Annotated[AsyncSession, Depends(get_db_session)] = None,
):
    """更新项目的接口级权限矩阵

    请求体格式:
    {
        "role": {
            "endpoint_key": true/false
        }
    }
    """
    # 验证输入
    for role in payload.keys():
        if role == "ADMIN":
            continue
        if role not in PROJECT_PERMISSION_ROLES:
            raise ValueError(f"无效的角色: {role}")

    # 替换权限配置
    await replace_api_endpoint_permissions(db, study_id, payload)

    # 返回更新后的权限矩阵
    permissions = await get_api_endpoint_permissions(db, study_id)

    result: dict[str, dict[str, dict[str, bool]]] = {}
    for role in PROJECT_PERMISSION_ROLES:
        if role == "ADMIN":
            continue
        result[role] = {}
        for endpoint_key in API_ENDPOINT_PERMISSIONS.keys():
            result[role][endpoint_key] = {
                "allowed": permissions.get(role, {}).get(endpoint_key, False)
            }

    return result