import re
import tempfile
from pathlib import Path

import pandas as pd
import requests


class HsEvaluatorClient:

    def __init__(self, username, space_id):
        self.space_id = space_id
        self.username = username
        self.base_url = "https://agents-course-unit4-scoring.hf.space"

    def fetch_questions(self):
        try:
            response = requests.get(f"{self.base_url}/questions", timeout=15)
            response.raise_for_status()
            return response.json()
        except Exception as e:
            print(f"Error fetching questions: {e}")
            return None

    def download_file_if_any(self, task_id: str) -> str | None:
        url = f"{self.base_url}/files/{task_id}"
        try:
            resp = requests.get(url, timeout=30)
            if resp.status_code == 404:
                return None
            resp.raise_for_status()
        except requests.exceptions.HTTPError as e:
            raise e

        # ▸ Save bytes to a named file inside the system temp dir
        #    Try to keep original extension from Content-Disposition if present.
        cdisp = resp.headers.get("content-disposition", "")
        filename = task_id  # default base name
        if "filename=" in cdisp:
            m = re.search(r'filename="([^"]+)"', cdisp)
            if m:
                filename = m.group(1)  # keep provided name

        tmp_dir = Path(tempfile.gettempdir()) / "gaia_files"
        tmp_dir.mkdir(exist_ok=True)
        file_path = tmp_dir / filename
        with open(file_path, "wb") as f:
            f.write(resp.content)
        return str(file_path)

    def submit_answers(self, answers_payload, results_log):
        agent_code = f"https://huggingface.co/spaces/{self.space_id}/tree/main"
        submission_data = {
            "username": self.username.strip(),
            "agent_code": agent_code,
            "answers": answers_payload
        }
        try:
            response = requests.post(f"{self.base_url}/submit", json=submission_data, timeout=60)
            response.raise_for_status()
            result_data = response.json()
            final_status = (
                f"Submission Successful!\n"
                f"User: {result_data.get('username')}\n"
                f"Overall Score: {result_data.get('score', 'N/A')}% "
                f"({result_data.get('correct_count', '?')}/{result_data.get('total_attempted', '?')} correct)\n"
                f"Message: {result_data.get('message', 'No message received.')}"
            )
            return final_status, pd.DataFrame(results_log)
        except Exception as e:
            return f"Submission Failed: {e}", pd.DataFrame(results_log)