#!/usr/bin/env python3

import json
import os
from datetime import datetime, timezone


def record_event(
    evidence_log,
    *,
    service,
    service_token,
    source,
    port,
    result="ok",
    **extra,
):
    entry = {
        "timestamp": datetime.now(timezone.utc).isoformat(),
        "service": service,
        "service_token": service_token,
        "source": source,
        "port": port,
        "result": result,
    }

    entry.update(extra)

    line = (
        json.dumps(
            entry,
            sort_keys=True,
            separators=(",", ":"),
        )
        + "\n"
    )

    fd = os.open(
        evidence_log,
        os.O_WRONLY | os.O_CREAT | os.O_APPEND,
        0o600,
    )

    try:
        os.write(fd, line.encode("utf-8"))
    finally:
        os.close(fd)