"""按需求变更推导修改范围和是否需要规划，不调用模型"""

from app.processor.base import BaseNode
from app.processor.nodes.action_node import action_block_reason
from app.processor.state import QueryState
from app.schemas.change_scope import ChangeScope


class ScopeNode(BaseNode):
    name = "scope_node"

    def process(self, state: QueryState) -> QueryState:
        # 浅拷贝状态
        updated_state: QueryState = state.copy()
        # 需求节点已校验目标 ID 并落地唯一候选，范围直接由变更推导
        scope = ChangeScope.from_requirement(state["requirement"])

        # 保存范围，下面的动作能力检查也需要读取该结果
        updated_state["change_scope"] = scope
        # 需要规划时先交给后续规划流程，不在此处判断能否直接生成动作
        # 无需规划时检查操作能力，无法执行则记录阻塞原因，通过则返回 None
        reason = None if scope.needs_planning else action_block_reason(updated_state)
        # 写入本次检查结果，没有阻塞原因时同时清空旧的失败说明
        updated_state["failure_reason"] = reason
        # 有阻塞原因时标记失败，否则保持运行状态，继续后续处理
        updated_state["status"] = "failed" if reason else "running"
        return updated_state