agent.py

import os
from openai import OpenAI
from tools.file_loader import load_file_if_any

client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))

SYSTEM_PROMPT = """You are an advanced AI agent participating in the GAIA benchmark. 
For each question, read the text and any attached file, then provide a concise and accurate final answer.
Only return the answer itself — no explanations or formatting."""

def answer_question(question_obj):
    try:
        file_content = ""
        if question_obj.get("file_path"):
            file_content = load_file_if_any(question_obj["file_path"])

        user_prompt = f"""Question:
{question_obj['question']}

Attached file content (if any):
{file_content}

Final answer:"""

        # ✅ Use GPT-3.5-turbo (free-tier)
        response = client.chat.completions.create(
            model="gpt-3.5-turbo",
            messages=[
                {"role": "system", "content": SYSTEM_PROMPT},
                {"role": "user", "content": user_prompt}
            ]
        )

        return response.choices[0].message.content.strip()

    except Exception as e:
        return f"[ERROR] Failed to answer: {str(e)}"