"""白板接口 DTO（文本记事本）。"""

from __future__ import annotations

from datetime import datetime

from pydantic import BaseModel, Field


class WhiteboardOut(BaseModel):
    """白板完整内容（GET /api/wb/{id} 与 WS init 帧）。"""

    board_id: str
    content: str = Field("", description="白板文本内容")
    version: int = Field(0, description="乐观锁版本号，每次编辑 +1")
    edit_count: int = Field(0, description="累计编辑次数")
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class WhiteboardListItem(BaseModel):
    """管理页列表项。"""

    board_id: str
    edit_count: int
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class WhiteboardListResponse(BaseModel):
    """管理页列表响应。"""

    total: int
    items: list[WhiteboardListItem]