import json
import os
import tempfile
import pytest
from pathlib import Path

from bpf_logging import core


def test_setup_bpf_logging_creates_environment(monkeypatch):
    # Simuliert das Setup – erwartet keine Exceptions
    test_id = "test123"
    core.setup_bpf_logging(test_id)
    # Kein Rückgabewert, daher nur prüfbar, dass kein Fehler auftritt


def test_log_timekeeping_event_writes_json(monkeypatch):
    tmpdir = tempfile.TemporaryDirectory()
    log_path = Path(tmpdir.name) / "output" / "log_entries.json"

    # Umleitung des globalen Logpfads innerhalb core
    monkeypatch.setattr(core, "LOG_FILE", log_path)

    correlation_id = "cid-42"
    event_type = "first_tkread"

    # Ausführen des Loggings
    core.setup_bpf_logging(correlation_id)
    core.log_timekeeping_event(event_type, correlation_id)

    # Datei sollte existieren
    assert log_path.exists()

    # Inhalt prüfen
    with open(log_path, 'r', encoding='utf-8') as f:
        data = json.load(f)

    assert isinstance(data, list)
    assert len(data) == 1
    entry = data[0]
    assert entry["correlation_id"] == correlation_id
    assert entry["event_type"] == event_type
    assert isinstance(entry["timestamp"], float)

    tmpdir.cleanup()