Webhooks

// pages/api/webhook.ts
import type { NextApiRequest, NextApiResponse } from 'next';
import { verifySimplexWebhook, WebhookVerificationError, WebhookPayload } from 'simplex-ts';

// Disable Next.js body parsing
export const config = {
  api: {
    bodyParser: false,
  },
};

// Helper to read raw body
async function getRawBody(req: NextApiRequest): Promise<string> {
  const chunks: Buffer[] = [];
  return new Promise((resolve, reject) => {
    req.on('data', (chunk: Buffer) => chunks.push(chunk));
    req.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')));
    req.on('error', reject);
  });
}

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  if (req.method !== 'POST') {
    return res.status(405).json({ error: 'Method not allowed' });
  }

  const webhookSecret = process.env.SIMPLEX_WEBHOOK_SECRET!;

  try {
    const body = await getRawBody(req);

    verifySimplexWebhook(body, req.headers, webhookSecret);

    const payload: WebhookPayload = JSON.parse(body);
    console.log('Session completed:', payload.session_id);

    // Access structured output if present
    if (payload.structured_output) {
      console.log('Structured data:', payload.structured_output);
      // Process custom fields from workflow
    }

    res.json({ received: true });
  } catch (error) {
    if (error instanceof WebhookVerificationError) {
      return res.status(401).json({ error: 'Invalid signature' });
    }
    res.status(500).json({ error: 'Internal server error' });
  }
}