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import os
import io
import pandas as pd
import requests
from openai import OpenAI

SKIPPED_TASKS = {
    # Tasks requiring video, image, or audio
    "a1e91b78-d3d8-4675-bb8d-62741b4b68a6",  # YouTube birds
    "cca530fc-4052-43b2-b130-b30968d8aa44",  # Chess image
    "9d191bce-651d-4746-be2d-7ef8ecadb9c2",  # Teal'c audio
    "99c9cc74-fdc8-46c6-8f8d-3ce2d3bfeea3",  # Strawberry pie.mp3
    "1f975693-876d-457b-a649-393859e79bf3"   # Homework.mp3
}

class GaiaAgent:
    def __init__(self):
        self.client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
        self.instructions = (
            "You are a precise and logical assistant solving GAIA benchmark questions. "
            "Use any context or data provided. Respond with only the final answer."
        )
        self.api_url = "https://agents-course-unit4-scoring.hf.space"

    def analyze_csv(self, csv_text: str, question: str) -> str:
        try:
            df = pd.read_csv(io.StringIO(csv_text))
            q = question.lower()
            if "total" in q and "food" in q and "not including drinks" in q:
                food_items = df[df["category"].str.lower() == "food"]
                return f"Total food sales: ${food_items["sales"].sum():.2f}"
            return f"Sample row: {df.iloc[0].to_dict()}"
        except Exception as e:
            return f"[CSV parse failed: {e}]"

    def fetch_file_context(self, task_id: str, question: str) -> str:
        try:
            url = f"{self.api_url}/files/{task_id}"
            response = requests.get(url, timeout=10)
            response.raise_for_status()
            content_type = response.headers.get("Content-Type", "")

            if "csv" in content_type or url.endswith(".csv"):
                return self.analyze_csv(response.text, question)
            elif "json" in content_type:
                return f"JSON Preview: {response.text[:1000]}"
            elif "text/plain" in content_type:
                return f"Text Preview: {response.text[:1000]}"
            elif "pdf" in content_type:
                return "[PDF detected. OCR not supported.]"
            else:
                return f"[Unsupported file type: {content_type}]"

        except Exception as e:
            return f"[File error: {e}]"

    def __call__(self, question: str, task_id: str = None) -> str:
        if task_id in SKIPPED_TASKS:
            return "SKIPPED"

        file_fact = ""
        if task_id:
            file_fact = self.fetch_file_context(task_id, question)
            file_fact = f"FILE CONTEXT:\n{file_fact}\n"

        prompt = f"{self.instructions}\n\n{file_fact}QUESTION: {question}\nANSWER:"

        try:
            response = self.client.chat.completions.create(
                model="gpt-4-turbo",
                messages=[
                    {"role": "system", "content": self.instructions},
                    {"role": "user", "content": prompt}
                ],
                temperature=0.0,
            )
            return response.choices[0].message.content.strip()
        except Exception as e:
            return f"[Agent error: {e}]"