"""判断需求涉及的范围、规划和资源需求"""

import json

from langchain_core.messages import HumanMessage, SystemMessage

from app.clients.llm import get_llm
from app.processor.base import BaseNode
from app.processor.state import QueryState
from app.prompt.scope import SCOPE_SYSTEM_PROMPT
from app.schemas.change_scope import ChangeScope


class ScopeNode(BaseNode):
    name = "scope_node"

    async def process(self, state: QueryState) -> QueryState:
        requirement = state["requirement"]
        if requirement.needs_clarification or requirement.intent not in (
            "create_screen",
            "modify_screen",
        ):
            raise ValueError("ScopeNode 只处理信息完整的新建或修改需求")
        context = state["input_context"]
        llm_client = get_llm(ChangeScope)
        scope = await llm_client.ainvoke(
            [
                SystemMessage(content=SCOPE_SYSTEM_PROMPT),
                HumanMessage(
                    content=json.dumps(
                        {
                            "requirement": requirement.model_dump(mode="json"),
                            "input_context": context.model_dump(
                                mode="json", exclude_unset=True
                            ),
                        },
                        ensure_ascii=False,
                    )
                ),
            ]
        )
        existing_ids = {node.id for node in context.screen.nodes}
        if unknown_ids := set(scope.target_ids) - existing_ids:
            raise ValueError(f"范围引用了不存在的节点: {sorted(unknown_ids)}")
        required_ids = {
            node_id for change in requirement.changes for node_id in change.target_ids
        }
        if missing_ids := required_ids - set(scope.target_ids):
            raise ValueError(f"范围遗漏了需求中的节点: {sorted(missing_ids)}")
        return {**state, "change_scope": scope}


if __name__ == "__main__":
    import asyncio

    from pydantic import BaseModel

    from app.processor.nodes.input_node import InputNode
    from app.schemas.requirement import Requirement

    async def main():
        # 直接提供已理解的需求，单独测试范围判断，仅需 LLM 配置
        state: QueryState = {
            "request": {
                "prompt": "把销售额统计向右移动 50px，其他不变",
                "screen": {
                    "canvas": {"width": 1920, "height": 1080},
                    "nodes": [
                        {
                            "id": "sales-chart",
                            "type": "bar-chart",
                            "name": "销售额统计",
                            "layout": {"x": 26, "y": 34.8, "width": 400, "height": 260},
                        }
                    ],
                },
            }
        }
        state = InputNode().process(state)
        state["requirement"] = Requirement(
            intent="modify_screen",
            goal="销售额统计向右移动 50px",
            changes=[
                {
                    "target_scope": "nodes",
                    "target_ids": ["sales-chart"],
                    "operation": "move",
                    "parameters": {"delta_x": 50},
                }
            ],
            needs_clarification=False,
            constraints=["其他不变"],
        )
        node = ScopeNode()
        final_state = await node.process(state)
        print(
            json.dumps(
                {
                    key: value.model_dump(mode="json")
                    if isinstance(value, BaseModel)
                    else value
                    for key, value in final_state.items()
                },
                ensure_ascii=False,
                indent=2,
            )
        )

    asyncio.run(main())