daren/apps/brands/views.py

from django.shortcuts import render, get_object_or_404
from rest_framework import viewsets, status
from rest_framework.decorators import action
from rest_framework.response import Response
from rest_framework.permissions import IsAuthenticated
from apps.user.authentication import CustomTokenAuthentication
import logging

from .models import Brand, Product, Campaign, BrandChatSession
from .serializers import (
    BrandSerializer, 
    ProductSerializer, 
    CampaignSerializer, 
    BrandChatSessionSerializer,
    BrandDetailSerializer
)
from .services.status_polling_service import polling_service
from .services.offer_status_service import OfferStatusService

logger = logging.getLogger(__name__)

def api_response(code=200, message="成功", data=None):
    """统一API响应格式"""
    return Response({
        'code': code,
        'message': message,
        'data': data
    })

class BrandViewSet(viewsets.ModelViewSet):

    """品牌API视图集"""
    queryset = Brand.objects.all()
    serializer_class = BrandSerializer
    authentication_classes = [CustomTokenAuthentication]
    permission_classes = [IsAuthenticated]
    
    def get_serializer_class(self):
        if self.action == 'retrieve':
            return BrandDetailSerializer
        return BrandSerializer
    
    def list(self, request, *args, **kwargs):
        queryset = self.filter_queryset(self.get_queryset())
        serializer = self.get_serializer(queryset, many=True)
        return api_response(data=serializer.data)
    
    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        serializer = self.get_serializer(instance)
        return api_response(data=serializer.data)
    
    def update(self, request, *args, **kwargs):
        partial = kwargs.pop('partial', False)
        instance = self.get_object()
        serializer = self.get_serializer(instance, data=request.data, partial=partial)
        if serializer.is_valid():
            self.perform_update(serializer)
            return api_response(data=serializer.data)
        return api_response(code=400, message="更新失败", data=serializer.errors)
    
    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        self.perform_destroy(instance)
        return api_response(message="删除成功", data=None)
    
    @action(detail=True, methods=['get'])
    def products(self, request, pk=None):
        """获取品牌下的所有产品"""
        brand = self.get_object()
        products = Product.objects.filter(brand=brand, is_active=True)
        serializer = ProductSerializer(products, many=True)
        return api_response(data=serializer.data)
    
    @action(detail=True, methods=['get'])
    def campaigns(self, request, pk=None):
        """获取品牌下的所有活动"""
        brand = self.get_object()
        campaigns = Campaign.objects.filter(brand=brand, is_active=True)
        serializer = CampaignSerializer(campaigns, many=True)
        return api_response(data=serializer.data)
    
    @action(detail=True, methods=['get'])
    def dataset_ids(self, request, pk=None):
        """获取品牌的所有知识库ID"""
        brand = self.get_object()
        return api_response(data={'dataset_id_list': brand.dataset_id_list})


class ProductViewSet(viewsets.ModelViewSet):
    """产品API视图集"""
    queryset = Product.objects.filter(is_active=True)
    serializer_class = ProductSerializer
    authentication_classes = [CustomTokenAuthentication]
    permission_classes = [IsAuthenticated]
    
    def list(self, request, *args, **kwargs):
        queryset = self.filter_queryset(self.get_queryset())
        serializer = self.get_serializer(queryset, many=True)
        return api_response(data=serializer.data)
    
    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        serializer = self.get_serializer(instance)
        return api_response(data=serializer.data)
    
    def update(self, request, *args, **kwargs):
        partial = kwargs.pop('partial', False)
        instance = self.get_object()
        serializer = self.get_serializer(instance, data=request.data, partial=partial)
        if serializer.is_valid():
            self.perform_update(serializer)
            return api_response(data=serializer.data)
        return api_response(code=400, message="更新失败", data=serializer.errors)
    
    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        self.perform_destroy(instance)
        return api_response(message="删除成功", data=None)
    
    def perform_create(self, serializer):
        # 创建产品时自动更新品牌的dataset_id_list
        product = serializer.save()
        brand = product.brand
        
        # 确保dataset_id添加到品牌的dataset_id_list中
        if product.dataset_id and product.dataset_id not in brand.dataset_id_list:
            brand.dataset_id_list.append(product.dataset_id)
            brand.save(update_fields=['dataset_id_list', 'updated_at'])
    
    def perform_update(self, serializer):
        # 获取原始产品信息
        old_product = self.get_object()
        old_dataset_id = old_product.dataset_id
        
        # 保存更新后的产品
        product = serializer.save()
        brand = product.brand
        
        # 从品牌的dataset_id_list中移除旧的dataset_id，添加新的dataset_id
        if old_dataset_id in brand.dataset_id_list:
            brand.dataset_id_list.remove(old_dataset_id)
        
        if product.dataset_id and product.dataset_id not in brand.dataset_id_list:
            brand.dataset_id_list.append(product.dataset_id)
            
        brand.save(update_fields=['dataset_id_list', 'updated_at'])
    
    def perform_destroy(self, instance):
        # 软删除产品，并从品牌的dataset_id_list中移除对应的ID
        instance.is_active = False
        instance.save()
        
        brand = instance.brand
        if instance.dataset_id in brand.dataset_id_list:
            brand.dataset_id_list.remove(instance.dataset_id)
            brand.save(update_fields=['dataset_id_list', 'updated_at'])


class CampaignViewSet(viewsets.ModelViewSet):
    """活动API视图集"""
    queryset = Campaign.objects.filter(is_active=True)
    serializer_class = CampaignSerializer
    authentication_classes = [CustomTokenAuthentication]
    permission_classes = [IsAuthenticated]
    
    def get_permissions(self):
        """根据不同的操作设置不同的权限"""
        if self.action in ['stop_polling', 'active_pollings', 'token_info']:
            # 这些操作不需要身份验证
            return []
        return super().get_permissions()
    
    @action(detail=False, methods=['get'], url_path='token-info')
    def token_info(self, request):
        """获取当前用户的token信息和WebSocket URL示例"""
        # 检查用户是否已认证
        if not request.user.is_authenticated:
            return api_response(code=401, message="未授权，请先登录", data=None)
        
        # 获取当前用户的token
        from apps.user.models import UserToken
        token = None
        user_token = UserToken.objects.filter(user=request.user).first()
        if user_token:
            token = user_token.token
        
        # 如果没有token，返回错误
        if not token:
            return api_response(code=404, message="未找到有效的token，请重新登录", data=None)
        
        # 构建示例WebSocket URL
        base_url = request.get_host()
        ws_protocol = 'wss' if request.is_secure() else 'ws'
        
        # 构建示例URL
        ws_examples = {
            "活动状态WebSocket": f"{ws_protocol}://{base_url}/ws/campaigns/1/status/?token={token}",
            "活动产品状态WebSocket": f"{ws_protocol}://{base_url}/ws/campaigns/1/products/123/status/?token={token}",
        }
        
        # 构建响应
        data = {
            "user_id": request.user.id,
            "email": request.user.email,
            "token": token,
            "token_expired_at": user_token.expired_at.strftime('%Y-%m-%d %H:%M:%S') if hasattr(user_token, 'expired_at') else None,
            "websocket_examples": ws_examples
        }
        
        return api_response(data=data)
    
    def list(self, request, *args, **kwargs):
        queryset = self.filter_queryset(self.get_queryset())
        serializer = self.get_serializer(queryset, many=True)
        return api_response(data=serializer.data)
    
    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        serializer = self.get_serializer(instance)
        return api_response(data=serializer.data)
    
    def update(self, request, *args, **kwargs):
        partial = kwargs.pop('partial', False)
        instance = self.get_object()
        serializer = self.get_serializer(instance, data=request.data, partial=partial)
        if serializer.is_valid():
            self.perform_update(serializer)
            return api_response(data=serializer.data)
        return api_response(code=400, message="更新失败", data=serializer.errors)
    
    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        self.perform_destroy(instance)
        return api_response(message="删除成功", data=None)
    
    def perform_create(self, serializer):
        # 创建活动时自动更新品牌的dataset_id_list
        campaign = serializer.save()
        brand = campaign.brand
        
        # 确保dataset_id添加到品牌的dataset_id_list中
        if campaign.dataset_id and campaign.dataset_id not in brand.dataset_id_list:
            brand.dataset_id_list.append(campaign.dataset_id)
            brand.save(update_fields=['dataset_id_list', 'updated_at'])
    
    def perform_update(self, serializer):
        # 获取原始活动信息
        old_campaign = self.get_object()
        old_dataset_id = old_campaign.dataset_id
        
        # 保存更新后的活动
        campaign = serializer.save()
        brand = campaign.brand
        
        # 从品牌的dataset_id_list中移除旧的dataset_id，添加新的dataset_id
        if old_dataset_id in brand.dataset_id_list:
            brand.dataset_id_list.remove(old_dataset_id)
        
        if campaign.dataset_id and campaign.dataset_id not in brand.dataset_id_list:
            brand.dataset_id_list.append(campaign.dataset_id)
            
        brand.save(update_fields=['dataset_id_list', 'updated_at'])
    
    def perform_destroy(self, instance):
        # 软删除活动，并从品牌的dataset_id_list中移除对应的ID
        instance.is_active = False
        instance.save()
        
        brand = instance.brand
        if instance.dataset_id in brand.dataset_id_list:
            brand.dataset_id_list.remove(instance.dataset_id)
            brand.save(update_fields=['dataset_id_list', 'updated_at'])

    @action(detail=True, methods=['post'])
    def add_product(self, request, pk=None):
        """将产品添加到活动中"""
        campaign = self.get_object()
        product_id = request.data.get('product_id')
        
        if not product_id:
            return api_response(code=400, message="缺少产品ID", data=None)
        
        try:
            product = Product.objects.get(id=product_id, is_active=True)
            campaign.link_product.add(product)
            return api_response(message="产品添加成功", data=None)
        except Product.DoesNotExist:
            return api_response(code=404, message="产品不存在", data=None)
        except Exception as e:
            return api_response(code=500, message=f"添加产品失败: {str(e)}", data=None)
    
    @action(detail=True, methods=['post'])
    def remove_product(self, request, pk=None):
        """从活动中移除产品"""
        campaign = self.get_object()
        product_id = request.data.get('product_id')
        
        if not product_id:
            return api_response(code=400, message="缺少产品ID", data=None)
        
        try:
            product = Product.objects.get(id=product_id)
            campaign.link_product.remove(product)
            return api_response(message="产品移除成功", data=None)
        except Product.DoesNotExist:
            return api_response(code=404, message="产品不存在", data=None)
        except Exception as e:
            return api_response(code=500, message=f"移除产品失败: {str(e)}", data=None)

    @action(detail=True, methods=['get'])
    def creator_list(self, request, pk=None):
        """获取活动关联的达人列表"""
        campaign = self.get_object()
        from apps.daren_detail.models import CreatorCampaign, CreatorProfile
        
        try:
            # 获取活动关联的所有产品
            products = campaign.link_product.all()
            
            # 如果没有关联产品，使用活动本身作为产品
            if not products.exists():
                products = [campaign]
            
            all_creator_list = []
            
            # 遍历每个产品，获取相关达人
            for product in products:
                # 查询与活动关联的所有达人关联记录
                creator_campaigns = CreatorCampaign.objects.filter(
                    campaign_id=campaign.id
                ).select_related('creator')
                
                for cc in creator_campaigns:
                    creator = cc.creator
                    
                    # 构建响应数据
                    creator_data = {
                        "name": creator.name,
                        "category": creator.category,
                        "followers": f"{int(creator.followers / 1000)}k" if creator.followers else "0",
                        "GMV Generated": f"${creator.gmv}k" if creator.gmv else "$0",
                        "Views Generated": f"{int(creator.avg_video_views / 1000)}k" if creator.avg_video_views else "0",
                        "Pricing": f"${creator.pricing_min}" if creator.pricing_min else "$0",
                        "Status": cc.status
                    }
                    all_creator_list.append(creator_data)
            
            # 启动状态轮询
            try:
                # 构建达人-产品对
                creator_product_pairs = []
                for product in products:
                    product_id = product.id
                    for cc in creator_campaigns:
                        creator_id = cc.creator_id
                        creator_product_pairs.append((creator_id, product_id))
                
                # 启动轮询
                if creator_product_pairs:
                    polling_service.start_polling(
                        campaign_id=campaign.id, 
                        creator_product_pairs=creator_product_pairs,
                        interval=30  # 每30秒轮询一次
                    )
            except Exception as e:
                logger.error(f"启动状态轮询时出错: {str(e)}")
            
            # 构建活动基本信息
            campaign_info = {
                "name": campaign.name,
                "description": campaign.description,
                "image_url": campaign.image_url,
                "service": campaign.service,
                "creator_type": campaign.creator_type,
                "creator_level": campaign.creator_level,
                "creator_category": campaign.creator_category,
                "creators_count": len(all_creator_list),
                "gmv": campaign.gmv,
                "followers": campaign.followers,
                "views": campaign.views,
                "budget": campaign.budget,
                "start_date": campaign.start_date.strftime('%Y-%m-%d') if campaign.start_date else None,
                "end_date": campaign.end_date.strftime('%Y-%m-%d') if campaign.end_date else None,
                "status": campaign.status
            }
            
            return api_response(data={
                "campaign": campaign_info,
                "creators": all_creator_list
            })
            
        except Exception as e:
            logger.error(f"获取活动达人列表失败: {str(e)}")
            return api_response(code=500, message=f"获取活动达人列表失败: {str(e)}", data=None)

    @action(detail=True, methods=['post'])
    def update_creator_status(self, request, pk=None):
        """手动更新达人状态"""
        campaign = self.get_object()
        from apps.daren_detail.models import CreatorCampaign
        from .services.offer_status_service import OfferStatusService
        
        # 获取传入的达人ID和产品ID
        creator_id = request.data.get('creator_id')
        product_id = request.data.get('product_id')
        
        if not creator_id:
            return api_response(code=400, message="缺少必要参数: creator_id", data=None)
        
        try:
            # 查询达人与活动的关联
            creator_campaign = CreatorCampaign.objects.get(
                campaign_id=campaign.id,
                creator_id=creator_id
            )
            
            # 如果没有提供产品ID，则获取活动的第一个关联产品或使用活动ID
            if not product_id:
                if campaign.link_product.exists():
                    product = campaign.link_product.first()
                    product_id = str(product.id)
                else:
                    product_id = str(campaign.id)
            
            # 获取最新状态
            status = OfferStatusService.fetch_status(creator_id, product_id)
            
            if status:
                # 更新状态
                creator_campaign.status = status
                creator_campaign.save()
                
                # 获取所有达人的最新数据
                creator_list = OfferStatusService.get_campaign_creator_data(campaign.id)
                
                # 发送WebSocket更新，传递产品ID
                OfferStatusService.send_status_update(campaign.id, creator_id, status, product_id)
                
                return api_response(message="状态已更新", data=creator_list)
            else:
                return api_response(code=500, message="获取状态失败", data=None)
            
        except CreatorCampaign.DoesNotExist:
            return api_response(code=404, message="找不到达人与活动的关联", data=None)
        except Exception as e:
            logger.error(f"更新达人状态时出错: {str(e)}")
            return api_response(code=500, message=f"更新状态失败: {str(e)}", data=None)

    @action(detail=True, methods=['get'])
    def product_creators(self, request, pk=None):
        """根据活动ID和产品ID获取达人列表"""
        campaign = self.get_object()
        product_id = request.query_params.get('product_id')
        
        try:
            # 获取与活动关联的所有达人
            from apps.daren_detail.models import CreatorCampaign, CreatorProfile
            
            # 查询与活动关联的所有达人关联记录
            creator_campaigns = CreatorCampaign.objects.filter(
                campaign_id=campaign.id
            ).select_related('creator')
            
            # 如果指定了产品ID，返回单产品的达人数据
            if product_id:
                # 获取产品信息
                product = get_object_or_404(Product, id=product_id)
                
                creator_list = []
                
                # 构建达人-产品对，用于获取状态
                creator_product_pairs = []
                
                for cc in creator_campaigns:
                    creator = cc.creator
                    creator_id = creator.id
                    
                    # 添加到达人-产品对列表
                    creator_product_pairs.append((creator_id, product_id))
                    
                    # 获取状态
                    status = OfferStatusService.fetch_status(creator_id, product_id)
                    
                    # 如果无法获取状态，则使用数据库中的状态
                    if not status:
                        status = cc.status
                    else:
                        # 更新数据库中的状态
                        cc.status = status
                        cc.save(update_fields=['status', 'update_time'])
                    
                    # 构建响应数据
                    creator_data = {
                        "creator_name": creator.name,
                        "category": creator.category,
                        "followers": f"{int(creator.followers / 1000)}k" if creator.followers else "0",
                        "gmv_generated": f"${creator.gmv}k" if creator.gmv else "$0",
                        "views_generated": f"{int(creator.avg_video_views / 1000)}k" if creator.avg_video_views else "0",
                        "pricing": f"${creator.pricing_min}" if creator.pricing_min else "$0",
                        "status": status
                    }
                    creator_list.append(creator_data)
                
                # 启动轮询服务
                if creator_product_pairs:
                    try:
                        polling_service.start_polling(
                            campaign_id=campaign.id, 
                            creator_product_pairs=creator_product_pairs,
                            interval=30  # 每30秒轮询一次
                        )
                    except Exception as e:
                        logger.error(f"启动状态轮询时出错: {str(e)}")
                
                # 构建单产品响应
                response_data = {
                    "campaign_id": str(campaign.id),
                    "product_id": str(product.id),
                    "product_name": product.name,
                    "creators": creator_list
                }
                
                return api_response(data=response_data)
            
            # 如果没有指定产品ID，返回所有产品的达人数据
            else:
                # 获取活动关联的所有产品
                products = campaign.link_product.all()
                
                # 如果没有关联产品，使用活动本身作为产品
                if not products.exists():
                    products = []
                    
                    # 构建达人-产品对，使用活动ID作为产品ID
                    creator_product_pairs = []
                    fallback_product_id = str(campaign.id)
                    
                    for cc in creator_campaigns:
                        creator_id = cc.creator_id
                        creator_product_pairs.append((creator_id, fallback_product_id))
                    
                    # 获取所有达人数据
                    creator_list = []
                    
                    for cc in creator_campaigns:
                        creator = cc.creator
                        creator_id = creator.id
                        
                        # 获取状态
                        status = OfferStatusService.fetch_status(creator_id, fallback_product_id)
                        
                        # 如果无法获取状态，则使用数据库中的状态
                        if not status:
                            status = cc.status
                        else:
                            # 更新数据库中的状态
                            cc.status = status
                            cc.save(update_fields=['status', 'update_time'])
                        
                        # 构建响应数据
                        creator_data = {
                            "creator_name": creator.name,
                            "category": creator.category,
                            "followers": f"{int(creator.followers / 1000)}k" if creator.followers else "0",
                            "gmv_generated": f"${creator.gmv}k" if creator.gmv else "$0",
                            "views_generated": f"{int(creator.avg_video_views / 1000)}k" if creator.avg_video_views else "0",
                            "pricing": f"${creator.pricing_min}" if creator.pricing_min else "$0",
                            "status": status
                        }
                        creator_list.append(creator_data)
                    
                    # 启动轮询服务
                    if creator_product_pairs:
                        try:
                            polling_service.start_polling(
                                campaign_id=campaign.id, 
                                creator_product_pairs=creator_product_pairs,
                                interval=30  # 每30秒轮询一次
                            )
                        except Exception as e:
                            logger.error(f"启动状态轮询时出错: {str(e)}")
                    
                    # 构建单产品响应（使用活动作为产品）
                    response_data = {
                        "campaign_id": str(campaign.id),
                        "product_id": fallback_product_id,
                        "product_name": campaign.name,
                        "creators": creator_list
                    }
                    
                    return api_response(data=response_data)
                
                # 如果有关联产品，返回所有产品的达人数据
                products_data = []
                all_creator_product_pairs = []
                
                for product in products:
                    product_id = str(product.id)
                    creator_list = []
                    
                    for cc in creator_campaigns:
                        creator = cc.creator
                        creator_id = creator.id
                        
                        # 添加到达人-产品对列表
                        all_creator_product_pairs.append((creator_id, product_id))
                        
                        # 获取状态
                        status = OfferStatusService.fetch_status(creator_id, product_id)
                        
                        # 如果无法获取状态，则使用数据库中的状态
                        if not status:
                            status = cc.status
                        else:
                            # 更新数据库中的状态
                            cc.status = status
                            cc.save(update_fields=['status', 'update_time'])
                        
                        # 构建响应数据
                        creator_data = {
                            "creator_name": creator.name,
                            "category": creator.category,
                            "followers": f"{int(creator.followers / 1000)}k" if creator.followers else "0",
                            "gmv_generated": f"${creator.gmv}k" if creator.gmv else "$0",
                            "views_generated": f"{int(creator.avg_video_views / 1000)}k" if creator.avg_video_views else "0",
                            "pricing": f"${creator.pricing_min}" if creator.pricing_min else "$0",
                            "status": status
                        }
                        creator_list.append(creator_data)
                    
                    # 构建产品数据
                    product_data = {
                        "product_id": product_id,
                        "product_name": product.name,
                        "creators": creator_list
                    }
                    products_data.append(product_data)
                
                # 启动轮询服务
                if all_creator_product_pairs:
                    try:
                        polling_service.start_polling(
                            campaign_id=campaign.id, 
                            creator_product_pairs=all_creator_product_pairs,
                            interval=30  # 每30秒轮询一次
                        )
                    except Exception as e:
                        logger.error(f"启动状态轮询时出错: {str(e)}")
                
                # 构建多产品响应
                response_data = {
                    "campaign_id": str(campaign.id),
                    "products": products_data
                }
                
                return api_response(data=response_data)
            
        except Exception as e:
            logger.error(f"获取活动产品达人列表时出错: {str(e)}")
            return api_response(code=500, message=f"获取活动产品达人列表失败: {str(e)}", data=None)

    @action(detail=False, methods=['post'], url_path='stop-polling')
    def stop_polling(self, request):
        """停止指定活动或所有活动的状态轮询"""
        campaign_id = request.data.get('campaign_id')
        
        if campaign_id:
            # 停止指定活动的轮询
            result = polling_service.stop_polling(campaign_id)
            if result:
                return api_response(message=f"已停止活动 {campaign_id} 的状态轮询")
            else:
                return api_response(code=404, message=f"未找到活动 {campaign_id} 的轮询任务")
        else:
            # 停止所有轮询
            count = polling_service.stop_all()
            return api_response(message=f"已停止 {count} 个活动的状态轮询")

    @action(detail=False, methods=['get'], url_path='active-pollings')
    def active_pollings(self, request):
        """获取当前正在运行的所有轮询任务信息"""
        active_pollings = polling_service.get_active_pollings()
        return api_response(data=active_pollings)

    @action(detail=True, methods=['get'], url_path='websocket-url')
    def get_websocket_url(self, request, pk=None):
        """获取带认证的WebSocket连接URL"""
        campaign = self.get_object()
        product_id = request.query_params.get('product_id')
        
        # 获取当前用户的token
        from apps.user.models import UserToken
        token = None
        if request.user.is_authenticated:
            user_token = UserToken.objects.filter(user=request.user).first()
            if user_token:
                token = user_token.token
        
        # 如果没有token，返回错误
        if not token:
            return api_response(code=401, message="未授权，请先登录", data=None)
        
        # 构建基础URL
        base_url = request.get_host()
        ws_protocol = 'wss' if request.is_secure() else 'ws'
        
        # 根据是否有产品ID构建不同的WebSocket URL
        if product_id:
            ws_url = f"{ws_protocol}://{base_url}/ws/campaigns/{campaign.id}/products/{product_id}/status/?token={token}"
        else:
            ws_url = f"{ws_protocol}://{base_url}/ws/campaigns/{campaign.id}/status/?token={token}"
        
        return api_response(data={"websocket_url": ws_url})


class BrandChatSessionViewSet(viewsets.ModelViewSet):
    """品牌聊天会话API视图集"""
    queryset = BrandChatSession.objects.filter(is_active=True)
    serializer_class = BrandChatSessionSerializer
    authentication_classes = [CustomTokenAuthentication]
    permission_classes = [IsAuthenticated]
    
    def list(self, request, *args, **kwargs):
        queryset = self.filter_queryset(self.get_queryset())
        serializer = self.get_serializer(queryset, many=True)
        return api_response(data=serializer.data)
    
    def retrieve(self, request, *args, **kwargs):
        instance = self.get_object()
        serializer = self.get_serializer(instance)
        return api_response(data=serializer.data)
    
    def update(self, request, *args, **kwargs):
        partial = kwargs.pop('partial', False)
        instance = self.get_object()
        serializer = self.get_serializer(instance, data=request.data, partial=partial)
        if serializer.is_valid():
            self.perform_update(serializer)
            return api_response(data=serializer.data)
        return api_response(code=400, message="更新失败", data=serializer.errors)
    
    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        self.perform_destroy(instance)
        return api_response(message="删除成功", data=None)
    
    def perform_create(self, serializer):
        # 创建聊天会话时，可以设置使用特定品牌下的所有知识库
        chat_session = serializer.save()
        
        # 如果没有提供dataset_id_list，则使用品牌的dataset_id_list
        if not chat_session.dataset_id_list:
            brand = chat_session.brand
            chat_session.dataset_id_list = brand.dataset_id_list
            chat_session.save(update_fields=['dataset_id_list', 'updated_at'])