import random


def list_to_tree(
    menus, parent_flag: str = "pid", children_key: str = "children"
) -> list:
    """
    list 结构转 树结构
    :param menus: [{id:1, pid: 3}]
    :param parent_flag: 节点关系字段
    :param children_key: 生成树结构的子节点字段
    :return: list 类型的 树嵌套数据
    """ ""
    # 先转成字典 id作为key, 数据作为value
    menu_map = {menu["id"]: menu for menu in menus}
    arr = []
    for menu in menus:

        # 有父级
        if mid := menu.get(parent_flag):
            # 有 子项的情况
            if result := menu_map[mid].get(children_key):
                result.append(menu)
            else:
                # 无子项的情况
                menu_map[mid][children_key] = [menu]
        else:
            arr.append(menu)
    return arr


def get_system_info():
    """获取系统信息"""
    return {
        "usage": {
            "cpu": f"{random.random() * 100: .2}",
            "memory": f"{random.random() * 100: .2}",
            "disk": f"{random.random() * 100: .2}",
        },
        "performance": {
            "rps": f"{random.random() * random.randint(1, 50): .2}",
            "time": f"{random.random() * random.randint(1, 50): .2}",
            "user": f"{random.randint(1, 50)}",
        },
    }