from smolagents import CodeAgent, DuckDuckGoSearchTool, VisitWebpageTool, HfApiModel, load_tool, tool

import os
import arxiv
import datetime
import requests
import pytz
import yaml
from tools.final_answer import FinalAnswerTool

from Gradio_UI import GradioUI
from pypdf import PdfReader


@tool
def download_paper_by_id(paper_id: str) -> None: 
    """A tool that gets the ID of a paper and then downloads the pdf from arxiv. It saves the paper locally 
    in the "pdf" directory as f"pdf/{paper_id}.pdf".
    Args:
        paper_id: a string representing the id of the paper to download from arxiv.
    """
    os.makedirs("pdf", exist_ok=True)
    
    paper = next(arxiv.Client().results(arxiv.Search(id_list=[paper_id])))
    paper.download_pdf(filename=f"pdf/{paper_id}.pdf")
    
    return None

@tool
def read_pdf_file(filepath: str) -> str:
    """A tool that reads the pdf content of the file located in f"{filepath}".
    Args:
        filepath: a string representing the filepath of the pdf file to read.
    Returns:
        A string containing the content of the pdf file.
    """
    content = ""
    reader = PdfReader(f"{filepath}")
    
    print(len(reader.pages))
    
    pages = reader.pages[:3]
    for page in pages:
        content += page.extract_text()
        
    return content

@tool
def get_current_time_in_timezone(timezone: str) -> str:
    """A tool that fetches the current local time in a specified timezone.
    Args:
        timezone: A string representing a valid timezone (e.g., 'America/New_York').
    """
    try:
        # Create timezone object
        tz = pytz.timezone(timezone)
        # Get current time in that 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)}"


final_answer = FinalAnswerTool()

# If the agent does not answer, the model is overloaded, please use another model or the following Hugging Face Endpoint that also contains qwen2.5 coder:
# model_id='https://pflgm2locj2t89co.us-east-1.aws.endpoints.huggingface.cloud' 

model = HfApiModel(
max_tokens=2096,
temperature=0.5,
model_id='Qwen/Qwen2.5-Coder-32B-Instruct',# it is possible that this model may be overloaded
custom_role_conversions=None,
)


# Import tool from Hub
image_generation_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)

with open("prompts.yaml", 'r') as stream:
    prompt_templates = yaml.safe_load(stream)
    
agent = CodeAgent(
    model=model,
    tools=[final_answer, 
           DuckDuckGoSearchTool(), 
           VisitWebpageTool(), 
           download_paper_by_id, 
           read_pdf_file,
           image_generation_tool], 
    max_steps=6,
    verbosity_level=1,
    grammar=None,
    planning_interval=None,
    name=None,
    description=None,
    prompt_templates=prompt_templates
)


GradioUI(agent).launch()