import { supabase } from '@/integrations/supabase/client';

// Generate anonymous session hash (no PII)
function getSessionHash(): string {
  // Check if we have a session hash in sessionStorage
  let sessionHash = sessionStorage.getItem('session_hash');
  
  if (!sessionHash) {
    // Create a random hash for this session (no user data)
    sessionHash = `session_${Math.random().toString(36).substring(2, 15)}`;
    sessionStorage.setItem('session_hash', sessionHash);
  }
  
  return sessionHash;
}

// Debounce tracking to avoid rapid-fire views
const trackedViews = new Set<string>();

export async function trackPageView(
  entityType: 'park' | 'ride' | 'company',
  entityId: string
) {
  // Create unique key for this view
  const viewKey = `${entityType}:${entityId}`;
  
  // Don't track the same entity twice in the same session
  if (trackedViews.has(viewKey)) {
    return;
  }
  
  trackedViews.add(viewKey);
  
  try {
    // Track view asynchronously (fire and forget)
    await supabase.from('entity_page_views').insert({
      entity_type: entityType,
      entity_id: entityId,
      session_hash: getSessionHash()
    });
    
    console.log(`✅ Tracked view: ${entityType} ${entityId}`);
  } catch (error) {
    // Fail silently - don't break the page if tracking fails
    console.error('Failed to track page view:', error);
  }
}