Webhooks

import ImageKit from '@imagekit/nodejs';
import express from 'express';

const client = new ImageKit({
  privateKey: "your_private_key",
  webhookSecret: "whsec_..." // Copy from ImageKit dashboard
});

const app = express();

// For mixed APIs: Use JSON parser for all non-webhook routes
app.use((req, res, next) => {
  if (req.originalUrl === '/webhook') {
    next(); // Skip JSON parsing for webhook
  } else {
    express.json()(req, res, next);
  }
});

app.post(
  '/webhook',
  // ImageKit requires the raw body to construct the event
  express.raw({ type: 'application/json' }),
  (req, res) => {
    try {
      // Verify signature and parse webhook payload securely
      const event = client.webhooks.unwrap(req.body, {
        headers: req.headers
        // Optional: Use a different webhook secret for this request
        // key: 'whsec_different_secret'
      });
      
      // Alternative: For development/testing only (NEVER use in production)
      // const event = client.webhooks.unsafeUnwrap(req.body);

      console.log('Verified webhook event:', event.type);

      // Handle different event types with full type safety
      switch (event.type) {
        case 'video.transformation.accepted':
          console.log('Video transformation accepted:', event.data.asset.url);
          // Debugging: Track transformation requests
          break;
          
        case 'video.transformation.ready':
          console.log('Video transformation ready:', event.data.transformation.output?.url);
          // Update your database/CMS to show the transformed video
          // Example: updateVideoStatus(event.data.transformation.output.url, 'ready')
          break;
          
        case 'video.transformation.error':
          console.error('Video transformation error:', event.data.transformation.error?.reason);
          // Log error and check your origin/URL endpoint settings
          break;
          
        case 'upload.pre-transform.success':
          console.log('Pre-transform success:', event.data.fileId);
          // File uploaded and pre-transformation completed
          break;
          
        case 'upload.pre-transform.error':
          console.error('Pre-transform error:', event.data.transformation.error?.reason);
          break;
          
        case 'upload.post-transform.success':
          console.log('Post-transform success:', event.data.url);
          // Additional transformation completed
          break;
          
        case 'upload.post-transform.error':
          console.error('Post-transform error:', event.data.transformation.error?.reason);
          break;
          
        default:
          console.log(`Unhandled event type: ${event.type}`);
      }

      // Return a response to acknowledge receipt of the event
      res.json({ received: true });
      
    } catch (error) {
      // On error, log and return the error message
      console.log(`Error message: ${error.message}`);
      res.status(400).send(`Webhook Error: ${error.message}`);
    }
  }
);

const server = app.listen(3000);
console.log(
  `🚀 Webhook endpoint available at http://localhost:3000/webhook`
);