import re
from typing import Any, Optional
from smolagents.tools import Tool
import requests
import markdownify
import smolagents


class VisitWebpageTool(Tool):
    name = "visit_webpage"
    description = "Visits a webpage at the given url and reads its content as a markdown string. Use this to browse webpages."
    inputs = {'url': {'type': 'string',
                      'description': 'The url of the webpage to visit.'}}
    output_type = "string"

    def forward(self, url: str) -> str:
        try:
            # Add headers to mimic a browser
            headers = {
                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
            }

            # Send a GET request to the URL with a 20-second timeout
            response = requests.get(url, timeout=20, headers=headers)
            response.raise_for_status()

            # Convert the HTML content to Markdown
            markdown_content = markdownify.markdownify(response.text).strip()

            # Remove multiple line breaks
            markdown_content = re.sub(r"\n{3,}", "\n\n", markdown_content)

            return markdown_content[:10000]  # Limit content length

        except requests.exceptions.Timeout:
            return "The request timed out. Please try again later or check the URL."
        except requests.exceptions.RequestException as e:
            return f"Error fetching the webpage: {str(e)}"
        except Exception as e:
            return f"An unexpected error occurred: {str(e)}"

    def __init__(self, *args, **kwargs):
        self.is_initialized = False