import os
import requests
from typing import Optional
import tempfile

# --- File Download Helper Function ---
def download_file(task_id: str, api_url: str) -> Optional[str]:
    """Download file associated with a task_id from the evaluation API"""
    try:
        file_url = f"{api_url}/files/{task_id}"
        print(f"📁 Downloading file for task {task_id}")
        
        response = requests.get(file_url, timeout=30)
        response.raise_for_status()
        
        # Get filename from headers or create one
        content_disposition = response.headers.get('Content-Disposition', '')
        if 'filename=' in content_disposition:
            filename = content_disposition.split('filename=')[1].strip('"')
        else:
            content_type = response.headers.get('Content-Type', '')
            if 'image' in content_type:
                extension = '.jpg'
            elif 'audio' in content_type:
                extension = '.mp3'
            elif 'video' in content_type:
                extension = '.mp4'
            else:
                extension = '.txt'
            filename = f"task_{task_id}_file{extension}"
        
        # Save to temporary file
        temp_dir = tempfile.gettempdir()
        file_path = os.path.join(temp_dir, filename)
        
        with open(file_path, 'wb') as f:
            f.write(response.content)
        
        print(f"✅ File downloaded: {file_path}")
        return file_path
        
    except Exception as e:
        print(f"❌ Error downloading file for task {task_id}: {e}")
        return None
    
def clean_answer_for_eval(answer: str) -> str:
    """Clean the answer string for evaluation purposes."""
    #
    if isinstance(answer, str):
        answer = answer.strip()
        
        prefixes_to_remove = [
            "The answer is: ",
            "Answer: ",
            "The result is: ",
            "Result: ",
            "The final answer is: ",
        ]
        
        for prefix in prefixes_to_remove:
            if answer.startswith(prefix):
                answer = answer[len(prefix):].strip()
                break
    return answer