import uuid
from rest_framework.response import Response
from rest_framework import status


def convert_to_uuid(pk_str):
    """
    将字符串转换为UUID格式
    
    Args:
        pk_str: 字符串形式的UUID
        
    Returns:
        转换后的UUID对象或None
        
    Raises:
        ValueError: 如果字符串不是有效的UUID格式
    """
    if isinstance(pk_str, uuid.UUID):
        return pk_str
        
    pk_str = pk_str.strip()
    
    # 处理没有连字符的UUID
    if '-' not in pk_str and len(pk_str) == 32:
        pk_with_hyphens = f"{pk_str[0:8]}-{pk_str[8:12]}-{pk_str[12:16]}-{pk_str[16:20]}-{pk_str[20:]}"
        return uuid.UUID(pk_with_hyphens)
    else:
        return uuid.UUID(pk_str)


def format_user_response(user, include_is_active=False):
    """
    格式化用户信息响应
    
    Args:
        user: 用户对象
        include_is_active: 是否包含is_active字段
        
    Returns:
        格式化后的用户信息字典
    """
    response = {
        "id": str(user.id),
        "name": user.name,
        "email": user.email,
        "name": user.name,
        "role": user.role,
        "department": user.department,
        "group": user.group
    }
    
    if include_is_active:
        response["is_active"] = user.is_active
        
    return response


def validate_uuid_param(pk_str):
    """
    验证并转换UUID参数，返回标准的错误响应或UUID对象
    
    Args:
        pk_str: 字符串形式的UUID
        
    Returns:
        元组 (uuid_obj, None) 或 (None, error_response)
    """
    try:
        uuid_obj = convert_to_uuid(pk_str)
        return uuid_obj, None
    except ValueError:
        error_response = Response({
            "code": 400,
            "message": f"无效的用户ID格式: {pk_str}。用户ID应为有效的UUID格式。",
            "data": None
        }, status=status.HTTP_400_BAD_REQUEST)
        return None, error_response