import express from 'express';
import { getPublicKey, getPushSubscriptions, savePushSubscriptions } from '../services/webPush.js';

const router = express.Router();

// Obtener clave pública VAPID
router.get('/public-key', (req, res) => {
  try {
    const publicKey = getPublicKey();
    res.json({ publicKey });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

// Suscribirse a notificaciones push
router.post('/subscribe', async (req, res) => {
  try {
    const subscription = req.body;
    
    if (!subscription || !subscription.endpoint) {
      return res.status(400).json({ error: 'Suscripción inválida' });
    }
    
    const subscriptions = getPushSubscriptions();
    
    // Verificar si ya existe esta suscripción
    const existingIndex = subscriptions.findIndex(
      sub => sub.endpoint === subscription.endpoint
    );
    
    if (existingIndex >= 0) {
      subscriptions[existingIndex] = subscription;
    } else {
      subscriptions.push(subscription);
    }
    
    savePushSubscriptions(subscriptions);
    console.log(`✅ Nueva suscripción push guardada. Total: ${subscriptions.length}`);
    
    res.json({ success: true, totalSubscriptions: subscriptions.length });
  } catch (error) {
    console.error('Error guardando suscripción push:', error);
    res.status(500).json({ error: error.message });
  }
});

// Cancelar suscripción push
router.post('/unsubscribe', async (req, res) => {
  try {
    const subscription = req.body;
    
    if (!subscription || !subscription.endpoint) {
      return res.status(400).json({ error: 'Suscripción inválida' });
    }
    
    const subscriptions = getPushSubscriptions();
    const filtered = subscriptions.filter(
      sub => sub.endpoint !== subscription.endpoint
    );
    
    savePushSubscriptions(filtered);
    console.log(`✅ Suscripción push cancelada. Total: ${filtered.length}`);
    
    res.json({ success: true, totalSubscriptions: filtered.length });
  } catch (error) {
    console.error('Error cancelando suscripción push:', error);
    res.status(500).json({ error: error.message });
  }
});

export default router;