Answer Messenger questions and hand off to you

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

G = "https://graph.facebook.com/v21.0"
PAGE_ID = "104857600000000"

def page_token():
    user = credentials.connection("facebook", "work")
    return http.get(f"{G}/{PAGE_ID}", params={"fields": "access_token", "access_token": user}).json()["access_token"]

FAQ = "Open Mon-Sat 9am-6pm. Delivery 2-4 days, free over $50. Returns within 30 days with receipt."
SCHEMA = {"type": "object", "properties": {"handoff": {"type": "boolean"}, "reply": {"type": "string"}},
          "required": ["handoff", "reply"]}

@on_event
def handle(event):
    for entry in event.json.get("entry", []):
        for m in entry.get("messaging", []):
            if "message" not in m or m["message"].get("is_echo"):
                continue
            user, text = m["sender"]["id"], m["message"].get("text", "")
            if state.get(f"paused:{user}"):
                continue
            history = (state.get(f"history:{user}") or [])[-6:] + [f"Customer: {text}"]
            r = ai.generate(f"FAQ: {FAQ}\nConversation:\n" + "\n".join(history) +
                            "\nAnswer from the FAQ only. Set handoff=true if they ask for a person or sound upset.",
                            json_schema=SCHEMA, max_output_tokens=200).json
            if r["handoff"]:
                state.set(f"paused:{user}", True)
                notify.email_me("Messenger customer needs you", "\n".join(history))
                continue
            http.post(f"{G}/{PAGE_ID}/messages", json={"recipient": {"id": user}, "messaging_type": "RESPONSE",
                      "message": {"text": r["reply"]}}, params={"access_token": page_token()}).raise_for_status()
            state.set(f"history:{user}", history + [f"Us: {r['reply']}"])
    return {"ok": True}