// Main analytics integration module
import AgentDetector from '@superline-ai/agent-detection';
// Assuming providers are imported/created:
// import { BrowserMetadataProvider, BrowserEventProvider } from '...' 

let detector = null; // Hold detector instance

export function initializeAnalytics() {
  // Assuming providers are available in this scope
  const metadataProvider = new BrowserMetadataProvider(); // Example
  const eventsProvider = new BrowserEventProvider(); // Example
  detector = new AgentDetector(metadataProvider, eventsProvider);

  // Early initialization of agent detection
  AgentDetector.init({ autoStart: true });
  
  // Set up detection after sufficient interaction
  const detectionTimeout = setTimeout(async () => {
    try {
      await detectAndSendToGA();
    } catch (error) {
      console.error('Error during agent detection:', error);
      // Send fallback event in case of error
      gtag('event', 'agent_detection_error');
    }
  }, 5000);
  
  // Ensure detection happens before page unload if possible
  window.addEventListener('beforeunload', async () => {
    clearTimeout(detectionTimeout);
    await detectAndSendToGA();
  });
}

async function detectAndSendToGA() {
  // Check if GA is available
  if (typeof gtag !== 'function') {
    console.warn('Google Analytics not available');
    return;
  }
  
  // Ensure detector is initialized
  if (!detector) {
    console.warn('AgentDetector not initialized');
    return;
  }

  // Get detection result
  const result = await AgentDetector.finalizeDetection();
  
  // Set user properties
  gtag('set', 'user_properties', {
    is_agent: result.isAgent,
    agent_confidence: result.confidence
  });
  
  // Log detection event
  gtag('event', 'agent_detection_complete', {
    is_agent: result.isAgent,
    agent_confidence: result.confidence
  });
  
  // Optionally mark certain events differently for agents
  if (result.isAgent) {
    // Override the original gtag function to mark subsequent events
    const originalGtag = window.gtag;
    window.gtag = function(command, ...args) {
      if (command === 'event') {
        // Add agent information to all events
        const eventName = args[0];
        const params = args[1] || {};
        params.from_agent = true;
        originalGtag(command, eventName, params);
      } else {
        // Pass through other commands unchanged
        originalGtag(command, ...args);
      }
    };
  }
}