import os
import requests


DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"


def download_file(task_id: str, filename: str) -> str:
    """
    Downloads a file associated with the given task_id and saves it to the specified filename.
    Args:
        task_id (str): The task identifier used to fetch the file.
        filename (str): The desired filename to save the file as.
    Returns:
        str: The absolute path to the saved file.
    """
    api_url = DEFAULT_API_URL
    file_url = f"{api_url}/files/{task_id}"
    folder = 'data'
    print(f"📡 Fetching file from: {file_url}")
    try:
        response = requests.get(file_url, timeout=15)
        response.raise_for_status()

        # Save binary content to the given filename
        fpath = os.path.join(folder, filename)
        with open(fpath, "wb") as f:
            f.write(response.content)

        abs_path = os.path.abspath(fpath)
        print(f"✅ File saved as: {abs_path}")
        return abs_path

    except requests.exceptions.RequestException as e:
        error_msg = f"❌ Failed to download file for task {task_id}: {e}"
        print(error_msg)
        raise RuntimeError(error_msg)