// API Proxy for SearXNG and Tavily
export default async function handler(req, res) {
  if (req.method !== 'POST') {
    return res.status(405).json({ message: 'Method not allowed' });
  }

  const { query, engine } = req.body;

  try {
    let results = [];

    if (engine === 'tavily') {
      const TAVILY_API_KEY = process.env.TAVILY_API_KEY;
      
      if (TAVILY_API_KEY) {
        const response = await fetch('https://api.tavily.com/search', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({
            api_key: TAVILY_API_KEY,
            query: query,
            search_depth: "basic",
            max_results: 5
          }),
        });
        const data = await response.json();
        results = data.results || [];
      } else {
        // Mock Tavily Results
        results = [
          { 
            title: `Tavily Search Result: ${query}`, 
            url: 'https://tavily.com', 
            content: 'This is a simulated result from Tavily. To see real results, please add the TAVILY_API_KEY to your environment variables.' 
          },
          { 
            title: 'Understanding AI Search', 
            url: '#', 
            content: 'Tavily is a search engine built specifically for AI agents (LLMs), providing real-time, accurate, and factual results at speed.' 
          }
        ];
      }

    } else {
      // SearXNG Integration
      const SEARXNG_URL = process.env.SEARXNG_URL || 'http://localhost:8080';
      
      // Mock SearXNG Results
      results = [
        { 
          title: `SearXNG Result: ${query}`, 
          url: 'https://searxng.org', 
          content: 'SearXNG is a free metasearch engine which aggregates results from more than 70 search services.' 
        },
        { 
          title: 'Privacy Respecting Search', 
          url: '#', 
          content: 'SearXNG does not track or profile its users. Configure your own instance to ensure maximum privacy.' 
        }
      ];
    }

    return res.status(200).json({ results });
  } catch (error) {
    console.error('Search Error:', error);
    return res.status(500).json({ message: 'Internal Server Error' });
  }
}