import os
import sys
import tempfile
import requests
from dotenv import load_dotenv

# Load environment variables
load_dotenv()

# Add the current directory to Python path
sys.path.append(os.path.dirname(os.path.abspath(__file__)))

# Import the new agent system
from new_langraph_agent import run_agent, cleanup
from src.tracing import get_langfuse_callback_handler

# Default API URL - Using the same URL as the original basic_agent.py
DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"

# Initialize Langfuse CallbackHandler for LangGraph/Langchain (tracing)
try:
    langfuse_handler = get_langfuse_callback_handler()
    print("✅ Langfuse handler initialized successfully")
except Exception as e:
    print(f"Warning: Could not initialize Langfuse handler: {e}")
    langfuse_handler = None

def fetch_random_question(api_base: str = DEFAULT_API_URL):
    """Return JSON of /random-question."""
    resp = requests.get(f"{api_base}/random-question", timeout=30)
    resp.raise_for_status()
    return resp.json()


def maybe_download_file(task_id: str, api_base: str = DEFAULT_API_URL) -> str | None:
    """Try to download the file associated with a given task id. Returns local path or None."""
    url = f"{api_base}/files/{task_id}"
    try:
        resp = requests.get(url, timeout=60)
        if resp.status_code != 200:
            print(f"No file associated with task {task_id} (status {resp.status_code}).")
            return None
        # Create temp file with same name from headers if available
        filename = resp.headers.get("content-disposition", "").split("filename=")[-1].strip("\"") or f"{task_id}_attachment"
        tmp_path = os.path.join(tempfile.gettempdir(), filename)
        with open(tmp_path, "wb") as f:
            f.write(resp.content)
        print(f"Downloaded attachment to {tmp_path}")
        return tmp_path
    except requests.HTTPError as e:
        print(f"Could not download file for task {task_id}: {e}")
    except Exception as e:
        print(f"Error downloading file: {e}")
    return None


def main():
    print("Random Agent Test - New LangGraph Architecture")
    print("=" * 60)
    
    try:
        # Fetch random question
        q = fetch_random_question()
        task_id = str(q["task_id"])
        question_text = q["question"]
        print("\n=== Random Question ===")
        print(f"Task ID : {task_id}")
        print(f"Question: {question_text}")

        # Attempt to get attachment if any
        attachment_path = maybe_download_file(task_id)
        if attachment_path:
            question_text += f"\n\nAttachment available at: {attachment_path}"

        # Run the new agent system
        print("\n=== Running LangGraph Agent System ===")
        result = run_agent(question_text)
        
        print("\n=== Agent Answer ===")
        print(result)
        
    except Exception as e:
        print(f"Error in main execution: {e}")
        import traceback
        traceback.print_exc()
    
    finally:
        # Cleanup
        try:
            cleanup()
            print("\n✅ Agent cleanup completed")
        except Exception as e:
            print(f"⚠️ Cleanup warning: {e}")


if __name__ == "__main__":
    main()