Find out why customers cancel

from datetime import date
from clickruntime import on_event, on_trigger, ai, state, notify, verify, credentials

REASONS = ["price", "missing feature", "switched tool", "not using it", "support", "other"]

@on_event
def handle(event):
    if not verify.stripe(event.body, event.header("Stripe-Signature"), credentials.secret("STRIPE_WEBHOOK_SECRET")):
        return {"ignored": "bad signature"}
    if event.json["type"] != "customer.subscription.deleted":
        return {"ignored": event.json["type"]}
    details = event.json["data"]["object"].get("cancellation_details") or {}
    text = f"feedback: {details.get('feedback')}; comment: {(details.get('comment') or '')[:1000]}"
    label = ai.generate(text, max_output_tokens=10,
                        system=f"Pick one cancellation reason from: {', '.join(REASONS)}. Answer with the reason only.").text.strip().lower()
    label = label if label in REASONS else "other"
    counts = state.get("counts") or {}
    counts[label] = counts.get(label, 0) + 1
    state.set("counts", counts)
    return {"reason": label}

@on_trigger
def monthly(event):
    counts = state.get("counts") or {}
    lines = [f"{n:>3}  {r}" for r, n in sorted(counts.items(), key=lambda x: -x[1])]
    notify.email_me(f"Cancellation reasons up to {date.today():%b %d}", "\n".join(lines) or "No cancellations.")
    state.set("counts", {})
    return counts