"""在大屏 JSON 副本上删除组件，用于后端校验，不删除共享数据源"""

from app.actions.base import BaseActionHandler
from app.schemas.actions import DeleteAction
from app.schemas.screen import Screen


class DeleteHandler(BaseActionHandler[DeleteAction]):
    def apply(self, screen: Screen, action: DeleteAction) -> Screen:
        # 确认删除目标存在，并取得与原始输入隔离的大屏副本及目标节点
        result, target = self.copy_target(screen, action.target_id)
        # 从副本中移除目标组件，保留其余组件及共享数据源
        result.nodes = [node for node in result.nodes if node.id != target.id]
        # 返回删除后的完整大屏，原始输入保持不变
        return result