app.py

import asyncio
import os
import gradio as gr
import requests
import inspect
import pandas as pd
from langfuse import observe
from langchain_agent import LangChainAgent
from dotenv import load_dotenv
import json

load_dotenv()

# (Keep Constants as is)
# --- Constants ---
DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"

# --- Model Definitions ---
def load_model_config():
    with open('configurations/app-config.json', 'r') as f:
        config = json.load(f)
    return config.get('model_config', {})

AVAILABLE_MODELS = load_model_config()

@observe()
async def run_and_submit_all(model_provider: str, model_name: str, selected_questions: list, profile: gr.OAuthProfile | None):
    """
    Fetches all questions, runs the BasicAgent on them, submits all answers,
    and displays the results.
    """
    # --- Determine HF Space Runtime URL and Repo URL ---
    space_id = os.getenv("SPACE_ID") # Get the SPACE_ID for sending link to the code

    if profile:
        username= f"{profile.username}"
        print(f"User logged in: {username}")
    else:
        print("User not logged in.")
        return "Please Login to Hugging Face with the button.", None

    api_url = DEFAULT_API_URL
    questions_url = f"{api_url}/questions"
    submit_url = f"{api_url}/submit"
    file_url = f"{api_url}/files"

    # 1. Instantiate Agent ( modify this part to create your agent)
    try:
        agent = LangChainAgent()
    except Exception as e:
        print(f"Error instantiating agent: {e}")
        return f"Error initializing agent: {e}", None
    # In the case of an app running as a hugging Face space, this link points toward your codebase ( usefull for others so please keep it public)
    agent_code = f"https://huggingface.co/spaces/{space_id}/tree/main"
    print(agent_code)

    # 2. Fetch Questions
    print(f"Fetching questions from: {questions_url}")
    try:
        response = requests.get(questions_url, timeout=15)
        response.raise_for_status()
        questions_data = response.json()
        if not questions_data:
             print("Fetched questions list is empty.")
             return "Fetched questions list is empty or invalid format.", None
        print(f"Fetched {len(questions_data)} questions.")
    except requests.exceptions.RequestException as e:
        print(f"Error fetching questions: {e}")
        return f"Error fetching questions: {e}", None
    except requests.exceptions.JSONDecodeError as e:
         print(f"Error decoding JSON response from questions endpoint: {e}")
         print(f"Response text: {response.text[:500]}")
         return f"Error decoding server response for questions: {e}", None
    except Exception as e:
        print(f"An unexpected error occurred fetching questions: {e}")
        return f"An unexpected error occurred fetching questions: {e}", None

    # Filter questions
    if "All" not in selected_questions:
        questions_data = [q for q in questions_data if q['task_id'] in selected_questions]

    # 3. Run your Agent
    results_log = []
    answers_payload = []
    print(f"Running agent on {len(questions_data)} questions...")
    for item in questions_data:
        task_id = item.get("task_id")
        question_text = item.get("question")
        file_name = item.get("file_name")
        
        if not task_id or question_text is None:
            print(f"Skipping item with missing task_id or question: {item}")
            continue
        if file_name:
            if not os.path.exists("resource"):
                os.makedirs("resource")
            try:
                download_url = f"{file_url}/{task_id}"
                response = requests.get(download_url)
                response.raise_for_status()
                file_path = os.path.join("resource", file_name)
                with open(file_path, "wb") as f:
                    f.write(response.content)
                print(f"Successfully downloaded {file_name} to {file_path}")
                # Read the file content and pass it to the agent
                with open(file_path, "r", encoding="utf-8") as f:
                    file_content = f.read()
                question_text = f"{question_text}\n\nFile content:\n{file_content}"
            except requests.exceptions.RequestException as e:
                print(f"Error downloading file {file_name}: {e}")
            except IOError as e:
                print(f"Error reading file {file_name}: {e}")

        try:
            submitted_answer = await agent(question_text, model_name, model_provider)
            answers_payload.append({"task_id": task_id, "submitted_answer": submitted_answer})
            results_log.append({"Task ID": task_id, "Question": question_text, "Submitted Answer": submitted_answer})
        except Exception as e:
             print(f"Error running agent on task {task_id}: {e}")
             results_log.append({"Task ID": task_id, "Question": question_text, "Submitted Answer": f"AGENT ERROR: {e}"})

        # Wait for a short moment to avoid overwhelming the server (optional)
        await asyncio.sleep(1 * 60)

    if not answers_payload:
        print("Agent did not produce any answers to submit.")
        return "Agent did not produce any answers to submit.", pd.DataFrame(results_log)

    # 4. Prepare Submission 
    submission_data = {"username": username.strip(), "agent_code": agent_code, "answers": answers_payload}
    status_update = f"Agent finished. Submitting {len(answers_payload)} answers for user '{username}'..."
    print(status_update)

    # 5. Submit
    print(f"Submitting {len(answers_payload)} answers to: {submit_url}")
    try:
        response = requests.post(submit_url, 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.')}"
        )
        print("Submission successful.")
        results_df = pd.DataFrame(results_log)
        return final_status, results_df
    except requests.exceptions.HTTPError as e:
        error_detail = f"Server responded with status {e.response.status_code}. "
        try:
            error_json = e.response.json()
            error_detail += f" Detail: {error_json.get('detail', e.response.text)}"
        except requests.exceptions.JSONDecodeError:
            error_detail += f" Response: {e.response.text[:500]}"
        status_message = f"Submission Failed: {error_detail}"
        print(status_message)
        results_df = pd.DataFrame(results_log)
        return status_message, results_df
    except requests.exceptions.Timeout:
        status_message = "Submission Failed: The request timed out."
        print(status_message)
        results_df = pd.DataFrame(results_log)
        return status_message, results_df
    except requests.exceptions.RequestException as e:
        status_message = f"Submission Failed: Network error - {e}"
        print(status_message)
        results_df = pd.DataFrame(results_log)
        return status_message, results_df
    except Exception as e:
        status_message = f"An unexpected error occurred during submission: {e}"
        print(status_message)
        results_df = pd.DataFrame(results_log)
        return status_message, results_df

def get_questions():
    api_url = DEFAULT_API_URL
    questions_url = f"{api_url}/questions"
    try:
        response = requests.get(questions_url, timeout=15)
        response.raise_for_status()
        questions_data = response.json()
        
        formatted_questions = [("All", "All")]
        for index, q in enumerate(questions_data):
            task_id = q.get('task_id')
            question_text = q.get('question', '')
            if task_id is not None:
                label = f"{index + 1} - {question_text[:20]}..."
                print(f"Generated label for task_id {task_id}: {label}") # Debug print
                formatted_questions.append((label, task_id))

        return formatted_questions
    except Exception as e:
        print(f"Error fetching questions for UI: {e}")
        return [("All", "All")]

# --- Build Gradio Interface using Blocks ---
with gr.Blocks() as demo:
    gr.Markdown("# Basic Agent Evaluation Runner")
    gr.Markdown(
        '''
        **Instructions:**

        1.  Please clone this space, then modify the code to define your agent's logic, the tools, the necessary packages, etc ...
        2.  Log in to your Hugging Face account using the button below. This uses your HF username for submission.
        3.  Select the model provider and model to use.
        4.  Select the questions to run (or "All").
        5.  Click 'Run Evaluation & Submit All Answers' to fetch questions, run your agent, submit answers, and see the score.

        ---
        **Disclaimers:**
        Once clicking on the "submit button, it can take quite some time ( this is the time for the agent to go through all the questions).
        This space provides a basic setup and is intentionally sub-optimal to encourage you to develop your own, more robust solution. For instance for the delay process of the submit button, a solution could be to cache the answers and submit in a seperate action or even to answer the questions in async.
        '''
    )

    gr.LoginButton()

    with gr.Row():
        providers = list(AVAILABLE_MODELS.keys())
        default_provider = providers[0] if providers else None
        model_provider_dd = gr.Dropdown(label="Model Provider", choices=providers, value=default_provider)
        model_name_dd = gr.Dropdown(label="Model Name", choices=AVAILABLE_MODELS.get(default_provider, []))

    def update_models(provider):
        models = AVAILABLE_MODELS.get(provider, [])
        return gr.Dropdown(choices=models, value=models[0] if models else None)

    model_provider_dd.change(fn=update_models, inputs=model_provider_dd, outputs=model_name_dd)

    question_selection = gr.CheckboxGroup(label="Select Questions to Run", choices=get_questions(), value=["All"])

    run_button = gr.Button("Run Evaluation & Submit Selected Answers")

    status_output = gr.Textbox(label="Run Status / Submission Result", lines=5, interactive=False)
    results_table = gr.DataFrame(label="Questions and Agent Answers", wrap=True)

    run_button.click(
        fn=run_and_submit_all,
        inputs=[model_provider_dd, model_name_dd, question_selection],
        outputs=[status_output, results_table]
    )

if __name__ == "__main__":
    print("\n" + "-"*30 + " App Starting " + "-"*30)
    # Check for SPACE_HOST and SPACE_ID at startup for information
    space_host_startup = os.getenv("SPACE_HOST")
    space_id_startup = os.getenv("SPACE_ID") # Get SPACE_ID at startup

    if space_host_startup:
        print(f"✅ SPACE_HOST found: {space_host_startup}")
        print(f"   Runtime URL should be: https://{space_host_startup}.hf.space")
    else:
        print("ℹ️  SPACE_HOST environment variable not found (running locally?).")

    if space_id_startup: # Print repo URLs if SPACE_ID is found
        print(f"✅ SPACE_ID found: {space_id_startup}")
        print(f"   Repo URL: https://huggingface.co/spaces/{space_id_startup}")
        print(f"   Repo Tree URL: https://huggingface.co/spaces/{space_id_startup}/tree/main")
    else:
        print("ℹ️  SPACE_ID environment variable not found (running locally?). Repo URL cannot be determined.")

    print("-"*(60 + len(" App Starting ")) + "\n")

    print("Launching Gradio Interface for Basic Agent Evaluation...")
    demo.launch(debug=False, share=False, server_name="0.0.0.0")