from langgraph.graph import StateGraph, START, END
from langgraph.graph.state import CompiledStateGraph
from .asistant import Assistant
from .shared_state import SharedState
from .retrieval import Retrieval


def build_agent() -> "CompiledStateGraph":
    """
    Build the agent using the StateGraph.
    """
    builder = StateGraph(SharedState)
    assistant = Assistant()  # Initialize the assistant component
    retrieval = Retrieval()  # Initialize the retrieval component
    builder.add_node(
        "retrieval",
        retrieval,
    )

    builder.add_node(
        "assistant",
        assistant
    )

    builder.add_edge(
        START,
        "retrieval",
    )
    builder.add_edge(
        "retrieval",
        "assistant",
    )
    builder.add_edge(
        "assistant",
        END,
    )
    return builder.compile()