import os
import gradio as gr
import requests
import pandas as pd

from smolagents import CodeAgent, HfApiModel, DuckDuckGoSearchTool, tool

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

# --- Tool Definitions ---

@tool
def summarize_query(query: str) -> str:
    """
    Provides a structured summary to reframe a query if search results are unclear or poor.

    Args:
        query (str): The search query that needs summarization.

    Returns:
        str: A concise summary of key facts about the given query.
    """
    return f"Summarize and reframe: {query}"

search_tool = DuckDuckGoSearchTool()

# --- System Message for ReACT + Scratchpad + Auto-Retry ---

system_message = """
You are a ReACT agent with scratchpad memory and a retry mechanism.

For every question:
1. Thought: Think what is needed.
2. Action: (Optional) Use a tool with a clear query.
3. Observation: Record what tool returned.

If the first Observation is empty or irrelevant:
4. Thought: The result was unclear. I should reframe and retry.
5. Action: summarize_query with the original query.
6. Action: DuckDuckGoSearchTool with the reframed query.
7. Observation: Record new result.

Then:
8. Thought: Reflect on all observations.
9. FINAL ANSWER: Provide the answer.

Formatting Rules:
- Begin with FINAL ANSWER: [your answer]
- Numbers: plain (no commas unless list)
- Strings: no articles unless inside proper names
- Lists: comma-separated without extra punctuation
"""

# --- Build the Smart Agent ---

smart_agent = CodeAgent(
    tools=[search_tool, summarize_query],
    model=HfApiModel(),                 # no prompt here
    system_message=system_message       # moved into CodeAgent
)

# --- Integrate into Gradio App ---

class BasicAgent:
    def __init__(self):
        print("SmolAgent with ReACT, Scratchpad & Retry initialized.")

    def __call__(self, question: str) -> str:
        print(f"Agent received question (first 50 chars): {question[:50]}...")
        return smart_agent.run(question)

def run_and_submit_all(profile: gr.OAuthProfile | None):
    space_id = os.getenv("SPACE_ID")
    if profile:
        username = profile.username
    else:
        return "Please log in to Hugging Face using the button above.", None

    agent = BasicAgent()
    agent_code = f"https://huggingface.co/spaces/{space_id}/tree/main"

    # Fetch questions
    try:
        resp = requests.get(f"{DEFAULT_API_URL}/questions", timeout=15)
        resp.raise_for_status()
        questions = resp.json()
        if not questions:
            return "No questions fetched.", None
    except Exception as e:
        return f"Error fetching questions: {e}", None

    # Run agent
    logs, payload = [], []
    for item in questions:
        tid = item.get("task_id")
        q = item.get("question")
        if not tid or q is None:
            continue
        try:
            ans = agent(q)
        except Exception as e:
            ans = f"AGENT ERROR: {e}"
        logs.append({"Task ID": tid, "Question": q, "Submitted Answer": ans})
        payload.append({"task_id": tid, "submitted_answer": ans})

    if not payload:
        return "Agent did not produce any answers to submit.", pd.DataFrame(logs)

    # Submit
    sub = {"username": username, "agent_code": agent_code, "answers": payload}
    try:
        r = requests.post(f"{DEFAULT_API_URL}/submit", json=sub, timeout=60)
        r.raise_for_status()
        res = r.json()
        status = (
            f"Submission Successful!\n"
            f"User: {res.get('username')}\n"
            f"Score: {res.get('score', 'N/A')}% "
            f"({res.get('correct_count', '?')}/{res.get('total_attempted', '?')})"
        )
        return status, pd.DataFrame(logs)
    except Exception as e:
        return f"Submission Failed: {e}", pd.DataFrame(logs)

# --- Gradio UI ---

with gr.Blocks() as demo:
    gr.Markdown("# SmolAgent GAIA Evaluation Runner 🚀")
    gr.Markdown("1. Clone this space  2. Log in  3. Click **Run Evaluation & Submit All Answers**")
    gr.LoginButton()
    btn = gr.Button("Run Evaluation & Submit All Answers")
    out_status = gr.Textbox(label="Status", lines=5, interactive=False)
    out_table  = gr.DataFrame(label="Results")
    btn.click(fn=run_and_submit_all, outputs=[out_status, out_table])

if __name__ == "__main__":
    demo.launch(debug=True, share=False)