Write a daily email digest into a Google Doc

from datetime import date
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from clickruntime import on_trigger, credentials, ai

DOC_ID = "your-doc-id"

@on_trigger
def run(event):
    creds = Credentials(credentials.connection("google", "work"))
    gmail = build("gmail", "v1", credentials=creds, cache_discovery=False)
    ids = gmail.users().messages().list(userId="me", q="in:inbox newer_than:1d -category:promotions", maxResults=100).execute().get("messages", [])
    lines = []
    for m in ids:
        msg = gmail.users().messages().get(userId="me", id=m["id"], format="metadata", metadataHeaders=["From", "Subject"]).execute()
        h = {x["name"]: x["value"] for x in msg["payload"]["headers"]}
        lines.append(f"{h.get('From', '')} | {h.get('Subject', '')} | {msg.get('snippet', '')[:200]}")
    if not lines:
        return {"emails": 0}
    digest = ai.generate("Write a short digest of today's emails grouped by topic; flag ones needing a reply:\n" + "\n".join(lines),
                         max_output_tokens=800).text
    text = f"{date.today():%A %d %B %Y}\n{digest}\n\n"
    build("docs", "v1", credentials=creds, cache_discovery=False).documents().batchUpdate(
        documentId=DOC_ID, body={"requests": [{"insertText": {"location": {"index": 1}, "text": text}}]}).execute()
    return {"emails": len(lines)}