from typing import Any, Dict, Optional

from pydantic import BaseModel, Field


class MessagesDTO(BaseModel):
    """messages 表字段契约，对齐 Java Messages 实体。"""

    message_id: str = Field(..., description="消息 ID")
    conversation_id: str = Field(..., description="会话 ID")
    user: Optional[str] = Field(default=None, description="用户")
    query: str = Field(..., description="用户输入 / 提问内容")
    answer: Optional[str] = Field(default=None, description="回答消息内容")
    feedback: Optional[str] = Field(default=None, description="点赞 like / 点踩 dislike")
    feedback_content: Optional[str] = Field(default=None, description="点踩内容")
    created_at: int = Field(..., description="创建时间(毫秒时间戳)")
    updated_at: int = Field(..., description="更新时间(毫秒时间戳)")
    log: Dict[str, Any] = Field(default_factory=dict, description="当前对话日志(JSON)")