from smolagents import CodeAgent, HfApiModel, load_tool, tool
import datetime
import pytz
import yaml
from tools.final_answer import FinalAnswerTool
from tools.book_tool import BookSearchTool, BookDetailsTool
from tools.arxiv_tool import ArxivSearchTool, LatestPapersTool
from tools.web_search import DuckDuckGoSearchTool
from Gradio_UI import GradioUI

@tool
def calculator(operation: str) -> str:
    """A simple calculator tool that safely evaluates basic math expressions.
    
    Args:
        operation: The mathematical expression to evaluate (e.g., "2 + 2", "5 * 3"). 
                  Supports basic operations (+, -, *, /) and parentheses.
    
    Returns:
        str: The result of the calculation or an error message
    """
    try:
        allowed_chars = set("0123456789+-*/ .()")
        if not all(c in allowed_chars for c in operation):
            return "Error: Only basic math operations allowed"
        result = eval(operation, {"__builtins__": {}})
        return f"Result: {result}"
    except Exception as e:
        return f"Error calculating {operation}: {str(e)}"

@tool
def get_current_time_in_timezone(timezone: str) -> str:
    """Get the current time in a specified timezone.
    
    Args:
        timezone: The name of the timezone to get time for (e.g., 'America/New_York', 
                 'Asia/Tokyo', 'UTC'). Must be a valid timezone string.
    
    Returns:
        str: The current time in the specified timezone or an error message
    """
    try:
        tz = pytz.timezone(timezone)
        local_time = datetime.datetime.now(tz).strftime("%Y-%m-%d %H:%M:%S")
        return f"The current local time in {timezone} is: {local_time}"
    except Exception as e:
        return f"Error fetching time for timezone '{timezone}': {str(e)}"

def initialize_agent():
    """Initialize and return the CodeAgent with all tools."""
    
    # Initialize tools
    final_answer = FinalAnswerTool()
    book_search = BookSearchTool()
    book_details = BookDetailsTool()
    arxiv_search = ArxivSearchTool()
    latest_papers = LatestPapersTool()
    web_search = DuckDuckGoSearchTool(max_results=5)  # Initialize DDG search with 5 results
    
    # Initialize the model
    model = HfApiModel(
        max_tokens=2096,
        temperature=0.5,
        model_id='Qwen/Qwen2.5-Coder-32B-Instruct',
        custom_role_conversions=None,
    )

    # Load prompt templates
    with open("prompts.yaml", 'r') as stream:
        prompt_templates = yaml.safe_load(stream)

    # Initialize agent with all tools
    agent = CodeAgent(
        model=model,
        tools=[
            final_answer,
            calculator,
            get_current_time_in_timezone,
            book_search,
            book_details,
            arxiv_search,
            latest_papers,
            web_search
        ],
        max_steps=8,
        verbosity_level=1,
        grammar=None,
        planning_interval=None,
        name="ResearchAssistant",
        description="An AI assistant specialized in helping users discover and research books, papers, and web content on AI and machine learning.",
        prompt_templates=prompt_templates
    )

    return agent

# Launch Gradio UI
if __name__ == "__main__":
    # Initialize and launch the agent
    agent = initialize_agent()
    GradioUI(agent).launch()