Post yesterday's store sales to Slack every morning

from datetime import date, timedelta
from collections import Counter
from clickruntime import on_trigger, credentials, http, state, notify

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

@on_trigger
def run(event):
    auth = (credentials.secret("WOO_KEY"), credentials.secret("WOO_SECRET"))
    day = date.today() - timedelta(days=1)
    orders = http.get(f"{STORE}/orders", auth=auth, params={"after": f"{day}T00:00:00", "before": f"{day}T23:59:59",
                      "status": "processing,completed", "per_page": 100}).json()
    revenue = sum(float(o["total"]) for o in orders)
    top = Counter()
    for o in orders:
        for item in o["line_items"]:
            top[item["name"]] += item["quantity"]
    history = state.get("history") or []
    avg = sum(history) / len(history) if history else None
    text = f"Yesterday: {len(orders)} orders, ${revenue:,.2f}. Top: " + ", ".join(f"{n} ({q})" for n, q in top.most_common(3))
    if avg and abs(revenue - avg) > 0.5 * avg:
        text += f"\n:warning: Revenue is {revenue / avg - 1:+.0%} vs the 7-day average (${avg:,.2f})"
    notify.slack(text, channel="#sales")
    state.set("history", (history + [revenue])[-7:])
    return {"orders": len(orders), "revenue": revenue}