Get a Teams briefing before important meetings

from datetime import datetime, timedelta, timezone
from clickruntime import on_trigger, credentials, http, state, ai

DOMAIN = "contoso.com"
CHAT_ID = "your-teams-chat-id"
GRAPH = "https://graph.microsoft.com/v1.0"

@on_trigger
def run(event):
    h = {"Authorization": f"Bearer {credentials.connection('microsoft', 'work')}"}
    now = datetime.now(timezone.utc)
    meetings = http.get(f"{GRAPH}/me/calendarView", headers=h, params={"startDateTime": now.isoformat(), "endDateTime": (now + timedelta(hours=1)).isoformat()}).json()["value"]
    done, sent = set(state.get("briefed") or []), 0
    for m in meetings:
        emails = [a["emailAddress"]["address"] for a in m.get("attendees", []) if not a["emailAddress"]["address"].endswith("@" + DOMAIN)]
        if m["id"] in done or not emails:
            continue
        msgs = http.get(f"{GRAPH}/me/messages", headers=h, params={"$search": f'"participants:{emails[0]}"', "$top": 15, "$select": "subject,bodyPreview,from"}).json()["value"]
        history = "\n".join(f"{x['from']['emailAddress']['address']}: {x['subject']} - {x['bodyPreview'][:300]}" for x in msgs)
        try:
            brief = ai.generate(f"Meeting: {m['subject']}\nRecent emails:\n{history}", system="Brief me in 5 bullets: open items, promises, tone.", max_output_tokens=300).text
        except ai.AIError:
            brief = "Recent subjects:\n" + "\n".join(x["subject"] for x in msgs[:5])
        http.post(f"{GRAPH}/chats/{CHAT_ID}/messages", headers=h, json={"body": {"content": f"Briefing: {m['subject']}\n{brief}"}})
        done.add(m["id"])
        sent += 1
    state.set("briefed", list(done)[-200:])
    return {"briefings": sent}