Check booking requests against your calendar and book the good fits

import base64
from datetime import datetime, timedelta
from email.message import EmailMessage
from clickruntime import on_event, credentials, http, ai, notify

IDEAL = "Owners of service businesses with at least 5 staff, based in the UK."
CAL = "https://www.googleapis.com/calendar/v3"

def send(h, to, subject, text):
    m = EmailMessage(); m["To"] = to; m["Subject"] = subject; m.set_content(text)
    http.post("https://gmail.googleapis.com/gmail/v1/users/me/messages/send", headers=h, json={"raw": base64.urlsafe_b64encode(m.as_bytes()).decode()})

@on_event
def handle(event):
    p = event.json or {}
    h = {"Authorization": f"Bearer {credentials.connection('google', 'work')}"}
    fit = ai.generate(f"Ideal client: {IDEAL}\nRequest: {p.get('message', '')[:2000]}\nAnswer yes or no.", max_output_tokens=5).text.lower().startswith("yes")
    start = datetime.fromisoformat(p["start"])
    end = start + timedelta(minutes=30)
    busy = http.post(f"{CAL}/freeBusy", headers=h, json={"timeMin": start.isoformat(), "timeMax": end.isoformat(),
                     "items": [{"id": "primary"}]}).json()["calendars"]["primary"]["busy"]
    if fit and not busy:
        http.post(f"{CAL}/calendars/primary/events", headers=h, params={"sendUpdates": "all"}, json={"summary": f"Intro call: {p['name']}",
                  "start": {"dateTime": start.isoformat()}, "end": {"dateTime": end.isoformat()}, "attendees": [{"email": p["email"]}]})
        send(h, p["email"], "Your call is booked", f"Hi {p['name']}, you're booked for {start:%A %d %B at %H:%M}. A calendar invite is on its way.")
    else:
        send(h, p["email"], "About your call request", f"Hi {p['name']}, thank you for getting in touch. I'm not able to take this call, but I wish you the best.")
    notify.email_me(f"Booking request from {p['name']}", f"Fit: {fit}. Slot free: {not busy}.")
    return {"booked": fit and not busy}