Answer WhatsApp support questions and escalate to Slack

from clickruntime import on_event, credentials, http, notify, ai

FAQ = "Plans start at £9/month. Cancel any time in Settings. Support hours 8-6 UK."
SCHEMA = {"type": "object", "properties": {"reply": {"type": "string"}, "confident": {"type": "boolean"}}, "required": ["reply", "confident"]}
WA = "https://graph.facebook.com/v20.0/your-phone-number-id/messages"

def wa(to, text):
    http.post(WA, headers={"Authorization": f"Bearer {credentials.secret('WHATSAPP_TOKEN')}"},
              json={"messaging_product": "whatsapp", "to": to, "type": "text", "text": {"body": text}}).raise_for_status()
def incoming(event):
    changes = [c for e in (event.json or {}).get("entry", []) for c in e.get("changes", [])]
    return [(m["from"], m["text"]["body"]) for c in changes for m in c["value"].get("messages", []) if m.get("type") == "text"]

@on_event
def handle(event):
    for phone, text in incoming(event):
        r = ai.generate(text[:1500], json_schema=SCHEMA, max_output_tokens=200,
                        system=f"Answer from these facts only: {FAQ}. confident=false if unsure, a complaint, or they want a person.").json
        if r["confident"]:
            wa(phone, r["reply"])
        else:
            wa(phone, "Thanks for your message. A member of our team will reply here shortly.")
            notify.slack(f":speech_balloon: WhatsApp +{phone}: {text[:800]}", channel="#support")
    return {"ok": True}