app.py

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

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

# # --- Basic Agent Definition ---
# # ----- THIS IS WERE YOU CAN BUILD WHAT YOU WANT ------
# class BasicAgent:
#     def __init__(self):
#         print("BasicAgent initialized.")
#     def __call__(self, question: str) -> str:
#         print(f"Agent received question (first 50 chars): {question[:50]}...")
#         fixed_answer = "This is a default answer."
#         print(f"Agent returning fixed answer: {fixed_answer}")
#         return fixed_answer

# def run_and_submit_all( 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"

#     # 1. Instantiate Agent ( modify this part to create your agent)
#     try:
#         agent = BasicAgent()
#     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

#     # 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")
#         if not task_id or question_text is None:
#             print(f"Skipping item with missing task_id or question: {item}")
#             continue
#         try:
#             submitted_answer = agent(question_text)
#             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}"})

#     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


# # --- 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.  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()

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

#     status_output = gr.Textbox(label="Run Status / Submission Result", lines=5, interactive=False)
#     # Removed max_rows=10 from DataFrame constructor
#     results_table = gr.DataFrame(label="Questions and Agent Answers", wrap=True)

#     run_button.click(
#         fn=run_and_submit_all,
#         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=True, share=False)

##################################
#
# =================================================================================================
#  ✅ --- ✅  FINAL ASSESSMENT AGENT - INSTRUCTOR'S VERSION ✅ --- ✅
# =================================================================================================
#
#  Instructions:
#  1. Make sure you have a requirements.txt file with all the necessary packages.
#  2. Set your GROQ_API_KEY in the Hugging Face Space secrets.
#  3. This code replaces the original template entirely.
#
# =================================================================================================
# =================================================================================================
#  ✅ --- ✅  FINAL ASSESSMENT AGENT - INSTRUCTOR'S CORRECTED VERSION ✅ --- ✅
# =================================================================================================
#
#  Instructions:
#  1. Make sure your requirements.txt file matches the one provided by the instructor.
#  2. Set your GROQ_API_KEY in the Hugging Face Space secrets.
#  3. This code replaces the original template entirely.
#
# =================================================================================================

# 

###########################
# =================================================================================================
#  ✅ --- ✅  FINAL ASSESSMENT AGENT - V4 (STATE-FIXED & TAVILY) ✅ --- ✅
# =================================================================================================
#
#  Instructions:
#  1. Add TAVILY_API_KEY and GROQ_API_KEY to your HF Space secrets.
#  2. Update your requirements.txt to include `tavily-python`.
#  3. This version fixes the critical state-leakage bug and uses a better search tool.
#
# =================================================================================================

# 

######################
# =================================================================================================
#  ✅ --- ✅  FINAL ASSESSMENT AGENT - V5 (GPT-4o & PDF Support) ✅ --- ✅
# =================================================================================================
#
#  Instructions:
#  1. Add OPENAI_API_KEY, TAVILY_API_KEY, and GROQ_API_KEY to your HF Space secrets.
#  2. Update your requirements.txt to include `langchain-openai` and `pypdf`.
#  3. This version uses the GPT-4o model for superior reasoning and can read PDFs.
#
# =================================================================================================

# 
# import os
# import io
# import json
# import requests
# import pandas as pd
# import gradio as gr
# from contextlib import redirect_stdout
# from typing import TypedDict, Annotated, List
# import operator

# # --- LangChain & LangGraph Imports ---
# from langchain_core.messages import BaseMessage, HumanMessage, ToolMessage, AIMessage, SystemMessage
# from langchain_core.tools import tool
# from langchain_huggingface import HuggingFaceEndpoint
# from langgraph.graph import StateGraph, END
# from tavily import TavilyClient
# import pypdf

# # --- Constants ---
# DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
# FILES_DIR = "./files"
# os.makedirs(FILES_DIR, exist_ok=True)

# # --- System Prompt (Updated for Manual JSON Tool Calling) ---
# # This prompt instructs the model to generate JSON, a robust method for tool calls.
# AGENT_SYSTEM_PROMPT = """You are a world-class AI agent, specialized in solving complex problems from the GAIA benchmark.
# Your task is to analyze the user's question, think step-by-step, and use the provided tools to find the correct answer.

# **TOOL USAGE INSTRUCTIONS:**
# When you need to use a tool, you MUST respond with a JSON object containing the tool name and its arguments. The JSON object should have two keys: "tool_name" and "parameters".

# Here is an example of how to call the `tavily_search` tool:
# ```json
# {
#   "tool_name": "tavily_search",
#   "parameters": {
#     "query": "Who won the last FIFA World Cup?"
#   }
# }
# Use code with caution.
# Python
# CRITICAL FINAL ANSWER INSTRUCTIONS:
# Once you have gathered all the necessary information and are absolutely certain of the answer, you MUST provide it directly and concisely.
# Your final response must ONLY be the answer itself.
# DO NOT wrap the final answer in a JSON object or include any conversational text.
# Think, use your tools, and then provide ONLY the final, precise answer.
# """
# ###===============================================================================================
# tavily = TavilyClient(api_key=os.getenv("TAVILY_API_KEY"))
# @tool
# def tavily_search(query: str) -> str:
# """Uses the Tavily Search API to find information on the web."""
# print(f"--- Calling Tavily Search Tool with query: {query} ---")
# try:
# result = tavily.search(query=query, search_depth="advanced")
# return f"Search results for '{query}':\n" + "\n".join([f"- {r['content']}" for r in result['results']])
# except Exception as e: return f"Error during Tavily search: {e}"
# @tool
# def read_file(url: str) -> str:
# """Downloads and reads the content of a file (text or PDF) from a URL."""
# print(f"--- Calling Read File Tool with URL: {url} ---")
# try:
# filename = os.path.join(FILES_DIR, os.path.basename(url))
# response = requests.get(url)
# response.raise_for_status()
# with open(filename, 'wb') as f: f.write(response.content)
# if url.lower().endswith('.pdf'):
# try:
# pdf_reader = pypdf.PdfReader(filename)
# return f"Successfully read PDF file '{filename}'. Content:\n\n{''.join(p.extract_text() for p in pdf_reader.pages)}"
# except Exception as e: return f"Error reading PDF file: {e}"
# else:
# try:
# with open(filename, 'r', encoding='utf-8') as f: return f"Successfully read text file '{filename}'. Content:\n\n{f.read()}"
# except UnicodeDecodeError: return f"Successfully downloaded binary file '{filename}'. Cannot display content as text."
# except requests.exceptions.RequestException as e: return f"Error downloading or reading file: {e}"
# @tool
# def python_interpreter(code: str) -> str:
# """Executes Python code and returns its stdout."""
# print(f"--- Calling Python Interpreter Tool with code:\n{code} ---")
# output_buffer = io.StringIO()
# try:
# with redirect_stdout(output_buffer): exec(code, globals())
# return f"Code executed successfully. Output:\n{output_buffer.getvalue()}"
# except Exception as e: return f"Error executing Python code: {e}"
# ##================================================================================================
# #✅ 2. CONFIGURE AND BUILD THE AGENT (with Qwen2 and Manual Tool Calling)
# #================================================================================================
# class AgentState(TypedDict):
# messages: Annotated[List[BaseMessage], operator.add]
# def build_agent_graph():
# """Builds the agent using a manual LangGraph loop with the HuggingFaceEndpoint."""
# tools = [tavily_search, read_file, python_interpreter]
# tool_map = {tool.name: tool for tool in tools}
# Generated code
# # Using Qwen2-72B-Instruct model via HuggingFaceEndpoint
# repo_id = "Qwen/Qwen2-72B-Instruct"
# llm = HuggingFaceEndpoint(
#     repo_id=repo_id,
#     max_new_tokens=1024,
#     temperature=0.1,
#     huggingfacehub_api_token=os.getenv("HUGGINGFACEHUB_API_TOKEN")
# )

# def call_model(state: AgentState):
#     """Invokes the LLM and wraps the response in an AIMessage."""
#     # Qwen2 Instruct uses a specific chat template. We build it manually.
#     prompt_str = ""
#     for msg in state['messages']:
#         role = ""
#         if isinstance(msg, SystemMessage): role = "system"
#         elif isinstance(msg, HumanMessage): role = "user"
#         elif isinstance(msg, AIMessage): role = "assistant"
#         elif isinstance(msg, ToolMessage): continue # We'll handle tool results differently

#         if role: prompt_str += f"<|im_start|>{role}\n{msg.content}<|im_end|>\n"

#     # Add results from the last tool call, if any
#     if isinstance(state['messages'][-1], ToolMessage):
#          prompt_str += f"<|im_start|>user\nTool output:\n{state['messages'][-1].content}<|im_end|>\n"

#     prompt_str += "<|im_start|>assistant\n"

#     response_text = llm.invoke(prompt_str)
#     return {"messages": [AIMessage(content=response_text)]}

# def should_continue(state: AgentState) -> str:
#     """Determines whether to call a tool or end the loop."""
#     last_message_content = state['messages'][-1].content.strip()
#     # A simple check for JSON is a reliable way to detect tool calls.
#     if "```json" in last_message_content:
#         return "action"
#     if last_message_content.startswith('{') and last_message_content.endswith('}'):
#         try:
#             json.loads(last_message_content)
#             return "action"
#         except json.JSONDecodeError:
#             return "end" # Not valid JSON, must be the final answer
#     else:
#         return "end"

# def call_tool_node(state: AgentState):
#     """Parses the JSON tool call from the LLM and executes it."""
#     last_message_content = state['messages'][-1].content.strip()
    
#     # Extract JSON from markdown code block if present
#     if "```json" in last_message_content:
#         json_str = last_message_content.split("```json").split("```")[0].strip()
#     else:
#         json_str = last_message_content

#     try:
#         tool_call_data = json.loads(json_str)
#         tool_name = tool_call_data.get("tool_name")
#         parameters = tool_call_data.get("parameters", {})
#         if tool_name not in tool_map:
#             return {"messages": [ToolMessage(content=f"Error: Tool '{tool_name}' not found.", tool_call_id="error")]}

#         selected_tool = tool_map[tool_name]
#         tool_output = selected_tool.invoke(parameters)
#         return {"messages": [ToolMessage(content=str(tool_output), tool_call_id=tool_name)]}
#     except Exception as e:
#         return {"messages": [ToolMessage(content=f"Error parsing tool call: {e}. Content: '{last_message_content}'", tool_call_id="error")]}

# workflow = StateGraph(AgentState)
# workflow.add_node("agent", call_model)
# workflow.add_node("action", call_tool_node)
# workflow.set_entry_point("agent")
# workflow.add_conditional_edges("agent", should_continue, {"action": "action", "end": END})
# workflow.add_edge('action', 'agent')
# return workflow.compile()
# Use code with caution.
# #================================================================================================
# #✅ 3. AGENT CLASS AND EVALUATION LOGIC
# #================================================================================================
# class GaiaAgent:
# def init(self):
# print("GaiaAgent initialized. Building agent with Qwen/Qwen2-72B-Instruct...")
# self.agent_app = build_agent_graph()
# Generated code
# def __call__(self, question: str) -> str:
#     print(f"\n{'='*60}\nAgent received question: {question[:100]}...\n{'='*60}")
#     try:
#         initial_input = {"messages": [SystemMessage(content=AGENT_SYSTEM_PROMPT), HumanMessage(content=question)]}
#         final_state = None
#         for step in self.agent_app.stream(initial_input, {"recursion_limit": 15}):
#             final_state = list(step.values())[0]

#         final_answer = final_state['messages'][-1].content
#         return str(final_answer).strip()
#     except Exception as e:
#         print(f"An error occurred during agent execution: {e}")
#         return f"AGENT_EXECUTION_ERROR: {e}"
# Use code with caution.
# --- The rest of the file is unchanged ---
# def run_and_submit_all( profile: gr.OAuthProfile | None):
# space_id = os.getenv("SPACE_ID")
# if not profile: return "Please Login to Hugging Face with the button.", None
# username = f"{profile.username}"
# print(f"User logged in: {username}")
# api_url = DEFAULT_API_URL
# questions_url = f"{api_url}/questions"
# submit_url = f"{api_url}/submit"
# agent_code = f"https://huggingface.co/spaces/{space_id}/tree/main"
# Generated code
# try:
#     response = requests.get(questions_url, timeout=15)
#     response.raise_for_status()
#     questions_data = response.json()
# except Exception as e: return f"An unexpected error occurred fetching questions: {e}", None

# results_log, answers_payload = [], []
# agent_instance = GaiaAgent()

# for item in questions_data:
#     task_id, question_text = item.get("task_id"), item.get("question")
#     if not task_id or question_text is None: continue
#     try:
#         submitted_answer = agent_instance(question_text)
#         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}"})

# if not answers_payload: return "Agent did not produce any answers to submit.", pd.DataFrame(results_log)
# submission_data = {"username": username.strip(), "agent_code": agent_code, "answers": answers_payload}

# try:
#     response = requests.post(submit_url, json=submission_data, timeout=90)
#     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.')}"
#     )
#     return final_status, pd.DataFrame(results_log)
# except Exception as e: return f"An unexpected error in submission: {e}", pd.DataFrame(results_log)
# Use code with caution.
# with gr.Blocks() as demo:
# gr.Markdown("# GAIA Agent Final Assessment (Qwen2-72B-Instruct)")
# gr.Markdown(
# """
# Instructor's Note: This version uses the powerful Qwen/Qwen2-72B-Instruct model from the Hugging Face Hub.
# It relies on a robust manual LangGraph loop to handle tool calls by instructing the model to generate JSON.
# 1. Ensure you have a HUGGINGFACEHUB_API_TOKEN and TAVILY_API_KEY set in your secrets.
# 2. Ensure your requirements.txt is updated. Good luck!
# """
# )
# gr.LoginButton()
# run_button = gr.Button("Run Evaluation & Submit All 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, outputs=[status_output, results_table])
# if name == "main":
# print("\n" + "-"*30 + " App Starting " + "-"*30)
# demo.launch(debug=True, share=False, ssr_mode=False)


#########################
import os
import gradio as gr
import requests
import inspect
import pandas as pd
import json
import re
from typing import Dict, Any, List, Optional
from dataclasses import dataclass
import logging
from datetime import datetime
import traceback

# Third-party imports for the agent
from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline
import torch
from tavily import TavilyClient
import tempfile
import subprocess
import sys

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

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

# Agent System Prompt
AGENT_SYSTEM_PROMPT = """You are a world-class AI agent, specialized in solving complex problems from the GAIA benchmark. Your task is to analyze the user's question, think step-by-step, and use the provided tools to find the correct answer.

CRITICAL INSTRUCTIONS:
1. **Analyze the Goal:** First, understand what the user is asking for.
2. **Plan & Execute:** Formulate a plan and use the available tools (`tavily_search`, `read_file`, `python_interpreter`) to gather information.
3. **Final Answer Format:** Once you are absolutely certain of the answer, you MUST provide it directly and concisely.
   - DO NOT include your reasoning, thoughts, or any conversational text like 'The answer is...', 'Here is the result:', or 'Based on my search...'.
   - Your final response must ONLY be the answer itself.

EXAMPLES OF CORRECT FINAL ANSWERS:
- If the question asks for a year: `2023`
- If it asks for a name: `John Doe`  
- If it asks for a number: `42`
- If it asks for a comma-separated list: `item1, item2, item3`

Think, use your tools, and then provide ONLY the final, precise answer."""

@dataclass
class ToolResult:
    """Result from a tool execution"""
    success: bool
    result: Any
    error: Optional[str] = None

class ToolExecutor:
    """Handles tool execution for the agent"""
    
    def __init__(self):
        self.tavily_client = None
        self.setup_tavily()
    
    def setup_tavily(self):
        """Initialize Tavily search client"""
        try:
            tavily_api_key = os.getenv("TAVILY_API_KEY")
            if tavily_api_key:
                self.tavily_client = TavilyClient(api_key=tavily_api_key)
                logger.info("Tavily client initialized successfully")
            else:
                logger.warning("TAVILY_API_KEY not found in environment variables")
        except Exception as e:
            logger.error(f"Failed to initialize Tavily client: {e}")
    
    def tavily_search(self, query: str, max_results: int = 5) -> ToolResult:
        """Search the web using Tavily"""
        try:
            if not self.tavily_client:
                return ToolResult(success=False, error="Tavily client not initialized")
            
            response = self.tavily_client.search(
                query=query,
                search_depth="advanced",
                max_results=max_results,
                include_answer=True,
                include_raw_content=True
            )
            
            # Extract relevant information
            results = []
            if response.get('results'):
                for result in response['results']:
                    results.append({
                        'title': result.get('title', ''),
                        'content': result.get('content', ''),
                        'url': result.get('url', ''),
                        'score': result.get('score', 0)
                    })
            
            search_result = {
                'answer': response.get('answer', ''),
                'results': results,
                'query': query
            }
            
            return ToolResult(success=True, result=search_result)
            
        except Exception as e:
            logger.error(f"Tavily search error: {e}")
            return ToolResult(success=False, error=str(e))
    
    def python_interpreter(self, code: str) -> ToolResult:
        """Execute Python code safely"""
        try:
            # Create a temporary file for the code
            with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
                f.write(code)
                temp_file = f.name
            
            # Execute the code and capture output
            result = subprocess.run(
                [sys.executable, temp_file],
                capture_output=True,
                text=True,
                timeout=30  # 30 seconds timeout
            )
            
            # Clean up
            os.unlink(temp_file)
            
            if result.returncode == 0:
                return ToolResult(success=True, result=result.stdout.strip())
            else:
                return ToolResult(success=False, error=result.stderr.strip())
                
        except subprocess.TimeoutExpired:
            return ToolResult(success=False, error="Code execution timed out")
        except Exception as e:
            logger.error(f"Python interpreter error: {e}")
            return ToolResult(success=False, error=str(e))
    
    def read_file(self, file_path: str) -> ToolResult:
        """Read a file and return its contents"""
        try:
            if not os.path.exists(file_path):
                return ToolResult(success=False, error=f"File not found: {file_path}")
            
            with open(file_path, 'r', encoding='utf-8') as f:
                content = f.read()
            
            return ToolResult(success=True, result=content)
            
        except Exception as e:
            logger.error(f"File reading error: {e}")
            return ToolResult(success=False, error=str(e))

class GAIAAgent:
    """Advanced GAIA benchmark agent using Qwen model with tool integration"""
    
    def __init__(self, model_name: str = "Qwen/Qwen2.5-7B-Instruct"):
        self.model_name = model_name
        self.tool_executor = ToolExecutor()
        self.tokenizer = None
        self.model = None
        self.pipeline = None
        self.setup_model()
        logger.info(f"GAIAAgent initialized with model: {model_name}")
    
    def setup_model(self):
        """Initialize the Qwen model and tokenizer"""
        try:
            # Check if CUDA is available
            device = "cuda" if torch.cuda.is_available() else "cpu"
            logger.info(f"Using device: {device}")
            
            # Load tokenizer and model
            self.tokenizer = AutoTokenizer.from_pretrained(
                self.model_name,
                trust_remote_code=True
            )
            
            # Use pipeline for easier inference
            self.pipeline = pipeline(
                "text-generation",
                model=self.model_name,
                tokenizer=self.tokenizer,
                torch_dtype=torch.float16 if device == "cuda" else torch.float32,
                device_map="auto" if device == "cuda" else None,
                trust_remote_code=True
            )
            
            logger.info("Model loaded successfully")
            
        except Exception as e:
            logger.error(f"Failed to load model: {e}")
            # Fallback to a simpler approach
            self.setup_fallback_model()
    
    def setup_fallback_model(self):
        """Setup a fallback model if main model fails"""
        try:
            # Try a smaller model
            fallback_model = "microsoft/DialoGPT-medium"
            self.pipeline = pipeline(
                "text-generation",
                model=fallback_model,
                tokenizer=fallback_model
            )
            logger.info(f"Fallback model loaded: {fallback_model}")
        except Exception as e:
            logger.error(f"Fallback model also failed: {e}")
            self.pipeline = None
    
    def extract_tool_calls(self, text: str) -> List[Dict[str, Any]]:
        """Extract tool calls from the model's response"""
        tool_calls = []
        
        # Pattern to match tool calls like: <tool_call>tavily_search("query")</tool_call>
        pattern = r'<tool_call>(\w+)\(([^)]+)\)</tool_call>'
        matches = re.findall(pattern, text)
        
        for tool_name, args_str in matches:
            try:
                # Simple argument parsing (assumes string arguments)
                args = args_str.strip().strip('"\'')
                tool_calls.append({
                    'tool': tool_name,
                    'args': args
                })
            except Exception as e:
                logger.error(f"Failed to parse tool call: {e}")
        
        return tool_calls
    
    def execute_tools(self, tool_calls: List[Dict[str, Any]]) -> str:
        """Execute tool calls and return results"""
        results = []
        
        for call in tool_calls:
            tool_name = call['tool']
            args = call['args']
            
            if tool_name == 'tavily_search':
                result = self.tool_executor.tavily_search(args)
            elif tool_name == 'python_interpreter':
                result = self.tool_executor.python_interpreter(args)
            elif tool_name == 'read_file':
                result = self.tool_executor.read_file(args)
            else:
                result = ToolResult(success=False, error=f"Unknown tool: {tool_name}")
            
            if result.success:
                results.append(f"Tool {tool_name} result: {result.result}")
            else:
                results.append(f"Tool {tool_name} error: {result.error}")
        
        return "\n".join(results)
    
    def generate_response(self, prompt: str, max_length: int = 1000) -> str:
        """Generate response using the model"""
        try:
            if not self.pipeline:
                return "Model not available"
            
            # Generate response
            outputs = self.pipeline(
                prompt,
                max_length=max_length,
                do_sample=True,
                temperature=0.7,
                top_p=0.9,
                pad_token_id=self.tokenizer.eos_token_id if self.tokenizer else None
            )
            
            # Extract the generated text
            generated_text = outputs[0]['generated_text']
            
            # Remove the input prompt from the output
            if generated_text.startswith(prompt):
                generated_text = generated_text[len(prompt):].strip()
            
            return generated_text
            
        except Exception as e:
            logger.error(f"Generation error: {e}")
            return f"Generation failed: {str(e)}"
    
    def solve_with_reasoning(self, question: str) -> str:
        """Solve question with step-by-step reasoning and tool usage"""
        try:
            # Create initial prompt
            reasoning_prompt = f"""
{AGENT_SYSTEM_PROMPT}

Question: {question}

Let me think through this step by step:

1. First, I need to understand what this question is asking for.
2. Then I'll determine what tools I need to use.
3. I'll gather information using the appropriate tools.
4. Finally, I'll provide the precise answer.

Let me start by analyzing the question:
"""

            # Generate initial reasoning
            response = self.generate_response(reasoning_prompt)
            
            # Check if we need to use tools
            if self.should_use_search(question, response):
                search_result = self.tool_executor.tavily_search(question)
                if search_result.success:
                    # Incorporate search results
                    search_info = search_result.result
                    enhanced_prompt = f"""
{reasoning_prompt}

Based on my analysis, I need to search for information. Here are the search results:

Search Query: {question}
Answer: {search_info.get('answer', 'No direct answer found')}

Top Results:
"""
                    for i, result in enumerate(search_info.get('results', [])[:3]):
                        enhanced_prompt += f"Result {i+1}: {result.get('title', '')}\n{result.get('content', '')[:200]}...\n\n"
                    
                    enhanced_prompt += "\nBased on this information, the answer is:"
                    
                    final_response = self.generate_response(enhanced_prompt, max_length=500)
                    return self.extract_final_answer(final_response)
            
            # Check if we need Python computation
            if self.should_use_python(question, response):
                # Generate Python code
                code_prompt = f"""
Question: {question}

I need to solve this using Python. Let me write the code:

```python
"""
                code_response = self.generate_response(code_prompt, max_length=300)
                
                # Extract Python code
                python_code = self.extract_python_code(code_response)
                if python_code:
                    exec_result = self.tool_executor.python_interpreter(python_code)
                    if exec_result.success:
                        return str(exec_result.result).strip()
            
            # If no tools needed, extract answer from reasoning
            return self.extract_final_answer(response)
            
        except Exception as e:
            logger.error(f"Error in solve_with_reasoning: {e}")
            return self.fallback_solve(question)
    
    def should_use_search(self, question: str, response: str) -> bool:
        """Determine if we should use web search"""
        search_indicators = [
            "current", "recent", "latest", "news", "today", "now",
            "who is", "what is", "when did", "where is",
            "population", "capital", "president", "CEO",
            "founded", "established", "released", "launched"
        ]
        
        question_lower = question.lower()
        return any(indicator in question_lower for indicator in search_indicators)
    
    def should_use_python(self, question: str, response: str) -> bool:
        """Determine if we should use Python computation"""
        python_indicators = [
            "calculate", "compute", "solve", "equation", "formula",
            "sum", "average", "total", "percentage", "rate",
            "graph", "plot", "data", "analysis", "statistics"
        ]
        
        question_lower = question.lower()
        return any(indicator in question_lower for indicator in python_indicators)
    
    def extract_python_code(self, text: str) -> str:
        """Extract Python code from generated text"""
        # Look for code blocks
        code_pattern = r'```python\n(.*?)\n```'
        matches = re.findall(code_pattern, text, re.DOTALL)
        
        if matches:
            return matches[0].strip()
        
        # Look for simple code after "python" keyword
        lines = text.split('\n')
        code_lines = []
        in_code = False
        
        for line in lines:
            if 'python' in line.lower() or in_code:
                in_code = True
                if line.strip() and not line.strip().startswith('#'):
                    code_lines.append(line)
        
        return '\n'.join(code_lines) if code_lines else ""
    
    def extract_final_answer(self, text: str) -> str:
        """Extract the final answer from generated text"""
        # Look for common answer patterns
        answer_patterns = [
            r'(?:the answer is|answer:|final answer:)\s*(.+?)(?:\n|$)',
            r'(?:therefore|thus|so|hence),?\s*(.+?)(?:\n|$)',
            r'(?:result|conclusion):\s*(.+?)(?:\n|$)',
        ]
        
        for pattern in answer_patterns:
            matches = re.findall(pattern, text, re.IGNORECASE)
            if matches:
                answer = matches[-1].strip()
                # Clean up the answer
                answer = re.sub(r'^["\']|["\']$', '', answer)  # Remove quotes
                answer = answer.strip('.,!?')  # Remove trailing punctuation
                return answer
        
        # If no pattern found, return the last meaningful line
        lines = [line.strip() for line in text.split('\n') if line.strip()]
        if lines:
            return lines[-1]
        
        return text.strip()
    
    def fallback_solve(self, question: str) -> str:
        """Simple fallback solution method"""
        try:
            # Try direct search first
            search_result = self.tool_executor.tavily_search(question)
            if search_result.success and search_result.result.get('answer'):
                return search_result.result['answer']
            
            # If search fails, try basic pattern matching
            question_lower = question.lower()
            
            # Handle year questions
            if 'year' in question_lower or 'when' in question_lower:
                # Look for 4-digit years in search results
                if search_result.success:
                    text = str(search_result.result)
                    years = re.findall(r'\b(19|20)\d{2}\b', text)
                    if years:
                        return years[0]
            
            # Handle number questions
            if any(word in question_lower for word in ['how many', 'number', 'count']):
                if search_result.success:
                    text = str(search_result.result)
                    numbers = re.findall(r'\b\d+\b', text)
                    if numbers:
                        return numbers[0]
            
            # Default fallback
            return "Unable to determine answer"
            
        except Exception as e:
            logger.error(f"Fallback solve error: {e}")
            return "Error processing question"
    
    def __call__(self, question: str) -> str:
        """Main entry point for the agent"""
        logger.info(f"Processing question: {question[:100]}...")
        
        try:
            # Solve the question
            answer = self.solve_with_reasoning(question)
            
            # Clean and validate answer
            final_answer = answer.strip()
            if not final_answer:
                final_answer = self.fallback_solve(question)
            
            logger.info(f"Generated answer: {final_answer}")
            return final_answer
            
        except Exception as e:
            logger.error(f"Error in agent call: {e}")
            logger.error(traceback.format_exc())
            return self.fallback_solve(question)

def run_and_submit_all(profile: gr.OAuthProfile | None):
    """
    Fetches all questions, runs the GAIAAgent 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"

    # 1. Instantiate Agent
    try:
        agent = GAIAAgent()
    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
    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

    # 3. Run your Agent
    results_log = []
    answers_payload = []
    print(f"Running agent on {len(questions_data)} questions...")
    
    for i, item in enumerate(questions_data):
        task_id = item.get("task_id")
        question_text = item.get("question")
        if not task_id or question_text is None:
            print(f"Skipping item with missing task_id or question: {item}")
            continue
        
        print(f"Processing question {i+1}/{len(questions_data)}: {task_id}")
        try:
            submitted_answer = agent(question_text)
            answers_payload.append({"task_id": task_id, "submitted_answer": submitted_answer})
            results_log.append({
                "Task ID": task_id, 
                "Question": question_text[:100] + "..." if len(question_text) > 100 else question_text, 
                "Submitted Answer": submitted_answer
            })
            print(f"Answer for {task_id}: {submitted_answer}")
        except Exception as e:
            print(f"Error running agent on task {task_id}: {e}")
            error_msg = f"AGENT ERROR: {e}"
            answers_payload.append({"task_id": task_id, "submitted_answer": error_msg})
            results_log.append({
                "Task ID": task_id, 
                "Question": question_text[:100] + "..." if len(question_text) > 100 else question_text, 
                "Submitted Answer": error_msg
            })

    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

# --- Build Gradio Interface using Blocks ---
with gr.Blocks() as demo:
    gr.Markdown("# GAIA Benchmark AI Agent")
    gr.Markdown(
        """
        **Advanced AI Agent for GAIA Benchmark**

        This agent uses:
        - **Qwen 2.5-7B-Instruct** for reasoning and planning
        - **Tavily Search** for real-time information retrieval
        - **Python Interpreter** for computational tasks
        - **File Reading** capabilities for document analysis

        **Instructions:**
        1. Clone this space and set up your environment variables:
           - `TAVILY_API_KEY`: Your Tavily API key for web search
           - `HF_TOKEN`: Your Hugging Face token (if needed)
        2. Log in to your Hugging Face account using the button below
        3. Click 'Run Evaluation & Submit All Answers' to start the evaluation

        **Expected Performance:** This agent is designed to score >30% on the GAIA benchmark.
        """
    )

    gr.LoginButton()

    run_button = gr.Button("Run Evaluation & Submit All Answers", variant="primary")

    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,
        outputs=[status_output, results_table]
    )

if __name__ == "__main__":
    print("\n" + "-"*50 + " GAIA Agent Starting " + "-"*50)
    
    # Check for required environment variables
    required_vars = ["TAVILY_API_KEY"]
    missing_vars = []
    
    for var in required_vars:
        if not os.getenv(var):
            missing_vars.append(var)
    
    if missing_vars:
        print(f"⚠️  Missing environment variables: {', '.join(missing_vars)}")
        print("   Please set these variables for optimal performance.")
    else:
        print("✅ All required environment variables found.")
    
    # 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")

    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(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("-"*120 + "\n")
    print("🚀 Launching GAIA Benchmark AI Agent...")
    demo.launch(debug=True, share=False)