# apps/chat/serializers.py
from rest_framework import serializers
from apps.chat.models import ChatHistory
from apps.knowledge_base.models import KnowledgeBase

class ChatHistorySerializer(serializers.ModelSerializer):
    knowledge_base_id = serializers.UUIDField(source='knowledge_base.id', read_only=True)
    dataset_name = serializers.CharField(source='knowledge_base.name', read_only=True)
    user_id = serializers.UUIDField(source='user.id', read_only=True)

    class Meta:
        model = ChatHistory
        fields = [
            'id', 'user_id', 'knowledge_base_id', 'dataset_name', 'conversation_id',
            'title', 'role', 'content', 'parent_id', 'metadata', 'created_at', 'is_deleted'
        ]
        read_only_fields = ['id', 'user_id', 'knowledge_base_id', 'dataset_name', 'created_at', 'is_deleted']