from dataclasses import dataclass
from typing import List


@dataclass
class AgentResponse:
    text: str
    history: List[str]


class SimpleAgent:
    def __init__(self, name: str = "StarterAgent") -> None:
        self.name = name
        self._history: List[str] = []

    def respond(self, message: str) -> AgentResponse:
        cleaned = message.strip()
        if not cleaned:
            reply = "How can I help?"
        else:
            reply = f"{self.name} received: {cleaned}"

        self._history.append(f"user: {cleaned}")
        self._history.append(f"{self.name}: {reply}")
        return AgentResponse(text=reply, history=list(self._history))

    def history(self) -> List[str]:
        return list(self._history)