agent.py

import re
from langgraph.prebuilt import create_react_agent
from agent_util import Agent_Util
from prompts import *
from tools import *
from langgraph_supervisor import create_supervisor
from langchain.chat_models import init_chat_model
from langchain_core.messages import AIMessage

import glob

class Agent:
    def __init__(self):
        
        print("Initializing Agent....")
        print("**************************************************************************************")
        print('........ Versão: Ajuste prompt para tentar resolver as receitas   .....')
        print("**************************************************************************************")
        
        print("--> Audio Agent")
        self.audio_agent = create_react_agent(
            model=init_chat_model("openai:gpt-4o-mini"),
            tools=[extract_text_from_url_tool, extract_text_from_file_tool, clean_ingredient_measure_tool],
            prompt= AUDIO_AGENT_PROMPT,
            name="audio_agent",
        )
        
        print("--> Web Search Agent")
        self.web_search_agent = create_react_agent(
            model=init_chat_model("openai:gpt-4o-mini"),
            tools=[search_web_tool],
            prompt= WEB_SEARCH_AGENT_PROMPT,
            name="web_research_agent",
        )
        
        print("--> Supervisor")
        self.supervisor = create_supervisor(
            model=init_chat_model("openai:gpt-4o-mini", temperature=0),
            agents=[self.web_search_agent, self.audio_agent],
            tools=[bird_video_count_tool,chess_image_to_fen_tool,chess_fen_get_best_next_move_tool,
                get_excel_columns_tool, calculate_excel_sum_by_columns_tool,execute_python_code_tool,
                text_inverter_tool, check_table_commutativity_tool, filter_vegetables_from_list_tool],
            prompt= SUPERVISOR_PROMPT,
            add_handoff_back_messages=True,
            output_mode="last_message",
        ).compile()
        
        print("Agent initialized.")     
        
    
    def __call__(self, question: str, task_id: str, task_file_name: str) -> str:
        print(f"Agent received question({task_id}) (first 50 chars): {question[:50]}...")
    
        file_prefix = ""
        if task_file_name:
            print(f"Task com arquivo {task_file_name}")
            File_Util.baixa_arquivo_task(task_file_name)
            file_prefix = f"File: {task_file_name}  . "

        # Chamando sem stream
        response = self.supervisor.invoke(
            {
                "messages": [
                    {
                        "role": "user",
                        "content": f"{file_prefix}{question}",
                    }
                ]
            }
        )
        print(f"Resposta LLM: {response}")
        # Extrair o conteúdo das mensagens do tipo AIMessage
        final_content = ""
        for m in reversed(response['messages']):
            print(f"buscando resposta em {m.content}")
            if isinstance(m, AIMessage):
                print('AI Message')
                if "FINAL ANSWER:" in m.content.upper():
                    print("Tem Final Answer")
                    final_content = m.content
                    break

        # Extrair o valor final
        print(f"Final Content: {final_content}")
        match = re.search(r"(?i)FINAL ANSWER:\s*(.*)", final_content)
        final_answer = match.group(1).strip() if match else ""
        print("Final Answer:", final_answer)
            
        return final_answer