"""
Web scraping tools for fetching content from URLs.
"""

import logging
import requests
from bs4 import BeautifulSoup
from .base import register_tool

logger = logging.getLogger(__name__)

@register_tool(
    name="read_link",
    description="Truy cập và bóc tách nội dung chính từ một đường dẫn (URL). Giúp Agent hiểu nội dung bài báo, tài liệu online.",
    parameters=[
        {"name": "url", "type": "string", "description": "Đường dẫn (URL) cần đọc nội dung.", "required": True}
    ]
)
def tool_read_link(url: str) -> dict:
    """
    Fetches and parses a URL to extract the main content.
    """
    try:
        # 1. Fetch content with timeout
        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'
        }
        response = requests.get(url, headers=headers, timeout=10)
        response.raise_for_status()
        
        # 2. Parse with BeautifulSoup
        soup = BeautifulSoup(response.text, 'html.parser')
        
        # Remove script and style elements
        for script_or_style in soup(["script", "style", "nav", "footer", "header"]):
            script_or_style.decompose()
            
        # 3. Extract title and main text
        title = soup.title.string if soup.title else "No Title"
        
        # Simple extraction: get all paragraphs
        paragraphs = soup.find_all('p')
        text_content = "\n".join([p.get_text().strip() for p in paragraphs if p.get_text().strip()])
        
        # Truncate content for LLM context (approx 3000 chars)
        if len(text_content) > 3000:
            text_content = text_content[:3000] + "..."
            
        return {
            "status": "success",
            "data": {
                "url": url,
                "title": title.strip(),
                "content": text_content
            }
        }
        
    except requests.exceptions.Timeout:
        return {"status": "error", "message": "Yêu cầu quá hạn (timeout) khi truy cập URL."}
    except Exception as e:
        logger.error(f"Error in read_link: {e}")
        return {"status": "error", "message": f"Không thể đọc nội dung từ link: {str(e)}"}