{
  "name": "Stuart_Co_Telephony_Retell_Make_Wappi",
  "modules": [
    { "id": 1, "module": "gateway:CustomWebhook", "name": "Retell Webhook" },
    { "id": 2, "module": "util:RegexReplace", "name": "UK E.164 Sanitizer" },
    { "id": 3, "module": "router:BasicRouter", "name": "Intent Branch Router" },
    { "id": 4, "module": "google-sheets:AddRow", "name": "CRM Lead Sync" },
    { "id": 5, "module": "http:MakeRequest", "name": "Wappi WhatsApp API" },
    { "id": 6, "module": "twilio:SendSms", "name": "SMS Fallback", "isErrorHandler": true }
  ]
}

{
  "agent_name": "Stuart & Co Scottish Trade Receptionist",
  "voice_id": "eleven_turbo_v2_scottish_natural",
  "responsiveness": 0.8,
  "interruption_sensitivity": 0.75,
  "system_prompt": "You are the primary telephone receptionist for Stuart & Co in Glasgow...",
  "variables_schema": {
    "caller_name": "string",
    "postcode": "string",
    "trade_service": "string",
    "urgency": "string"
  }
}

import { Twilio } from 'twilio';

export async function handler(context: any, event: any, callback: any) {
  const twiml = new Twilio.twiml.VoiceResponse();
  // Forward caller media stream directly to Retell AI SIP URI
  const dial = twiml.dial({ answerOnBridge: true });
  dial.sip('sip:stuart-co-agent@sip.retellai.com');
  return callback(null, twiml);
}

export async function dispatchPostCallSummary(payload: CallSummaryPayload) {
  try {
    const wappiRes = await fetch('https://wappi.pro/api/sync/message/send', {
      method: 'POST',
      headers: { 'Authorization': process.env.WAPPI_API_KEY! },
      body: JSON.stringify({ recipient: payload.e164Phone, body: payload.whatsappText })
    });
    if (!wappiRes.ok) throw new Error('Wappi HTTP ' + wappiRes.status);
  } catch (err) {
    // Immediate fallback to Twilio SMS
    await twilioClient.messages.create({ to: payload.e164Phone, from: '+441419468821', body: payload.smsText });
  }
}