# tools/wikipedia_tools.py
"""
Wikipedia search tools using LlamaIndex's ready-made Wikipedia integration
Based on search results showing WikipediaToolSpec usage
"""

from typing import Optional, List
import logging
from .utils import logger

try:
    from llama_index.tools.wikipedia import WikipediaToolSpec
    WIKIPEDIA_AVAILABLE = True
except ImportError:
    logger.warning("LlamaIndex Wikipedia tools not available. Install with: pip install llama-index-tools-wikipedia")
    WIKIPEDIA_AVAILABLE = False

class WikipediaTools:
    """Wikipedia search and page retrieval tools using LlamaIndex"""
    
    def __init__(self):
        if not WIKIPEDIA_AVAILABLE:
            raise ImportError("LlamaIndex Wikipedia tools not installed")
        
        # Initialize the LlamaIndex Wikipedia tool spec
        self.tool_spec = WikipediaToolSpec()
        logger.info("Wikipedia tools initialized successfully")
    
    def search_wikipedia(self, query: str, language: str = 'en') -> str:
        """
        Search Wikipedia for pages related to a query
        Based on search results showing search_data method
        
        Args:
            query: Search term
            language: Wikipedia language (default: 'en')
            
        Returns:
            Search results from Wikipedia
        """
        try:
            logger.info(f"Searching Wikipedia for: {query}")
            
            # Use LlamaIndex's search_data method (from search results)
            results = self.tool_spec.search_data(query=query, lang=language)
            
            if results:
                logger.info(f"Found Wikipedia results for: {query}")
                return results
            else:
                return f"No Wikipedia results found for: {query}"
                
        except Exception as e:
            error_msg = f"Error searching Wikipedia: {str(e)}"
            logger.error(error_msg)
            return error_msg
    
    def get_wikipedia_page(self, page_title: str, language: str = 'en') -> str:
        """
        Retrieve a specific Wikipedia page
        Based on search results showing load_data method
        
        Args:
            page_title: Title of the Wikipedia page
            language: Wikipedia language (default: 'en')
            
        Returns:
            Content of the Wikipedia page
        """
        try:
            logger.info(f"Retrieving Wikipedia page: {page_title}")
            
            # Use LlamaIndex's load_data method (from search results)
            content = self.tool_spec.load_data(page=page_title, lang=language)
            
            if content:
                logger.info(f"Successfully retrieved Wikipedia page: {page_title}")
                return content
            else:
                return f"Wikipedia page not found: {page_title}"
                
        except Exception as e:
            error_msg = f"Error retrieving Wikipedia page '{page_title}': {str(e)}"
            logger.error(error_msg)
            return error_msg
    
    def search_and_summarize(self, query: str, language: str = 'en') -> str:
        """
        Search Wikipedia and get a focused summary
        Combines search and page retrieval for better results
        """
        try:
            # First search for relevant pages
            search_results = self.search_wikipedia(query, language)
            
            if "No Wikipedia results found" in search_results:
                return search_results
            
            # Extract the first few sentences for a summary
            # This gives us the most relevant information without overwhelming the LLM
            lines = search_results.split('\n')
            summary_lines = [line for line in lines[:10] if line.strip()]
            summary = '\n'.join(summary_lines)
            
            # Truncate if too long (to stay within token limits)
            if len(summary) > 2000:
                summary = summary[:2000] + "..."
            
            return summary
            
        except Exception as e:
            error_msg = f"Error in Wikipedia search and summarize: {str(e)}"
            logger.error(error_msg)
            return error_msg

# Convenience functions for direct use
def search_wikipedia(query: str, language: str = 'en') -> str:
    """Standalone function to search Wikipedia"""
    if not WIKIPEDIA_AVAILABLE:
        return "Wikipedia tools not available. Please install llama-index-tools-wikipedia"
    
    tools = WikipediaTools()
    return tools.search_wikipedia(query, language)

def get_wikipedia_page(page_title: str, language: str = 'en') -> str:
    """Standalone function to get a Wikipedia page"""
    if not WIKIPEDIA_AVAILABLE:
        return "Wikipedia tools not available. Please install llama-index-tools-wikipedia"
    
    tools = WikipediaTools()
    return tools.get_wikipedia_page(page_title, language)

def wikipedia_summary(query: str, language: str = 'en') -> str:
    """Standalone function to get a Wikipedia summary"""
    if not WIKIPEDIA_AVAILABLE:
        return "Wikipedia tools not available. Please install llama-index-tools-wikipedia"
    
    tools = WikipediaTools()
    return tools.search_and_summarize(query, language)