"""会话状态 Schema。"""

from __future__ import annotations

from datetime import datetime
from typing import Optional

from pydantic import BaseModel, ConfigDict, Field


class ConversationSessionBase(BaseModel):
    tenant_id: int
    sender: str = Field(min_length=1, max_length=128)
    current_project_id: Optional[int] = None
    last_intent: Optional[str] = Field(default=None, max_length=64)
    last_message_text: Optional[str] = Field(default=None, max_length=200)
    last_active_at: datetime
    created_at: datetime


class ConversationSessionRead(ConversationSessionBase):
    id: int

    model_config = ConfigDict(from_attributes=True)