"""前端设计请求：原始需求、当前大屏及可选补充上下文"""

from pydantic import Field

from .base import ExtensibleModel, JsonObject, NonBlankString
from .screen import Screen


class RequestContext(ExtensibleModel):
    selected_node_ids: list[NonBlankString] = Field(default_factory=list)
    screen_id: NonBlankString | None = None
    screen_revision: int | None = Field(default=None, ge=0)
    conversation_id: NonBlankString | None = None


class DesignRequest(ExtensibleModel):
    prompt: NonBlankString
    screen: Screen
    context: RequestContext = Field(default_factory=RequestContext)
    # 只预留 JSON 描述入口，暂不规定材料种类，也不读取文件或远程资源
    attachments: list[JsonObject] = Field(default_factory=list)