"""Example HTTP helper; uses an existing Arenza Personal Access Token with write scope."""
import json
import os
import urllib.error
import urllib.request


def send_event(event: dict, delivery_id: str) -> dict:
    install_id = os.environ["ARENZA_INSTALL_ID"]
    api_key = os.environ["ARENZA_API_KEY"]
    body = json.dumps(event, separators=(",", ":"), sort_keys=True).encode("utf-8")
    request = urllib.request.Request(
        f"https://api.arenza.ai/api/v1/billing-events/{install_id}",
        data=body,
        method="POST",
        headers={
            "Content-Type": "application/json",
            "Authorization": f"Bearer {api_key}",
            "webhook-id": delivery_id,
        },
    )
    try:
        with urllib.request.urlopen(request, timeout=10) as response:
            if response.status != 202:
                raise RuntimeError(f"Arenza returned HTTP {response.status}")
            receipt = json.load(response)
    except urllib.error.HTTPError as error:
        raise RuntimeError(f"Arenza returned HTTP {error.code}") from error
    if receipt.get("accepted") is not True or not receipt.get("receipt_id"):
        raise RuntimeError("Invalid Arenza receipt")
    return receipt