Draft chargeback evidence from the order and customer emails

from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from clickruntime import on_event, credentials, http, notify, ai

STORE = "https://shop.example.com/wp-json/wc/v3"

@on_event
def handle(event):
    dispute = (event.json or {})["data"]["object"]
    email = dispute.get("evidence", {}).get("customer_email_address") or dispute.get("billing_details", {}).get("email", "")
    auth = (credentials.secret("WOO_KEY"), credentials.secret("WOO_SECRET"))
    orders = http.get(f"{STORE}/orders", auth=auth, params={"search": email, "per_page": 3}).json()
    gmail = build("gmail", "v1", credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False)
    ids = gmail.users().messages().list(userId="me", q=f"from:{email} OR to:{email}", maxResults=5).execute().get("messages", [])
    snippets = [gmail.users().messages().get(userId="me", id=m["id"], format="metadata").execute()["snippet"] for m in ids]
    facts = [f"Order #{o['number']} {o['date_created'][:10]} ${o['total']} status {o['status']}: "
             + ", ".join(li["name"] for li in o["line_items"]) for o in orders]
    draft = ai.generate("Draft concise chargeback evidence for reason '" + dispute.get("reason", "") + "' using only these facts.\n"
                        "Orders:\n" + "\n".join(facts) + "\nEmails:\n" + "\n".join(snippets), max_output_tokens=700).text
    notify.email_me(f"Dispute evidence draft: {email} (${dispute['amount'] / 100:.2f})", draft)
    return {"orders": len(orders), "emails": len(snippets)}