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from abc import ABC, abstractmethod
from typing import Optional
from pydantic import Field
from app.agent.base import BaseAgent
from app.llm import LLM
from app.schema import AgentState, Memory
class ReActAgent(BaseAgent, ABC):
name: str
description: Optional[str] = None
system_prompt: Optional[str] = None
next_step_prompt: Optional[str] = None
llm: Optional[LLM] = Field(default_factory=LLM)
memory: Memory = Field(default_factory=Memory)
state: AgentState = AgentState.IDLE
max_steps: int = 10
current_step: int = 0
@abstractmethod
async def think(self) -> bool: # think处理当前状态和决定下一个行为
"""Process current state and decide next action"""
@abstractmethod
async def act(self) -> str: # 指定决定的行为
"""Execute decided actions"""
async def step(self) -> str: # 一个单独的步骤，思考，然后执行
"""Execute a single step: think and act."""
should_act = await self.think()
if not should_act:
return "Thinking complete - no action needed"
return await self.act()
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