"""会话及对话轮次，用于多轮上下文和后续持久化"""

from datetime import datetime
from typing import Literal

from pydantic import BaseModel


class Turn(BaseModel):
    """一次任务对应一轮对话，同一个 thread_id 多次写入时覆盖同一轮"""

    conversation_id: str
    thread_id: str
    message_id: str
    prompt: str  # 用户原始输入
    outcome: Literal["completed", "waiting_for_input", "failed", "cancelled"]
    summary: str  # 助手侧摘要，只描述后端生成了什么，不代表前端已执行
    created_at: datetime


class ConversationCreated(BaseModel):
    conversation_id: str


class ConversationDetail(BaseModel):
    conversation_id: str
    turns: list[Turn]