import operator
from typing import Annotated, TypedDict, List, Optional

from langchain_core.messages import BaseMessage


class AgentState(TypedDict):
    """
     state passed between every node in the graph.
     Fields
     -----
     messages: Includes conversation history without replacing.
     task_id: Unique task Identifier of GAIA
     question: random ques from GAIA API
     level: The difficulty level of the task
     file_name: Optional filename attached to the question
     answer: The extracted answer

    """

    messages: Annotated[List[BaseMessage], operator.add]
    task_id: str
    question: str
    level: str
    file_name: str
    answer: str
    file_name: Optional[str]
    answer: Optional[str]