#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-3.0-or-later
"""Compare the first Go detector port with the Python reference oracle."""
from __future__ import annotations

import json
import os
import subprocess
import sys
from pathlib import Path
from types import SimpleNamespace

ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(ROOT))

from enodia_sentinel import __version__, event  # noqa: E402
from enodia_sentinel.config import Config  # noqa: E402
from enodia_sentinel.detectors import deleted_exe  # noqa: E402
from enodia_sentinel.system import SystemState  # noqa: E402

HOST = "parity-host"
TIMESTAMP = "2026-07-10T00:00:00-07:00"


def main() -> int:
    fixture = ROOT / "tests/fixtures/go/deleted-exe.json"
    fixture_data = json.loads(fixture.read_text())
    env = os.environ.copy()
    env.pop("ENODIA_CONFIG", None)
    env["GOCACHE"] = "/tmp/enodia-go-cache"
    command = [
        "go", "run", "./cmd/enodia-sentinel-go",
        "--once", "--fixture", str(fixture),
        "--host", HOST, "--timestamp", TIMESTAMP,
    ]
    result = subprocess.run(
        command, cwd=ROOT / "go-agent", env=env,
        capture_output=True, text=True, timeout=60,
    )
    if result.returncode:
        print(result.stderr, file=sys.stderr, end="")
        return result.returncode
    go_events = [json.loads(line) for line in result.stdout.splitlines() if line]
    go_alerts = [record for record in go_events if record["event_type"] == "alert"]

    processes = [SimpleNamespace(**item) for item in fixture_data["processes"]]
    cfg = Config()
    cfg.detectors = frozenset({"deleted_exe"})
    state = SystemState(processes=processes, sockets=[])
    python_alerts = [
        event.from_alert(alert, host=HOST, timestamp=TIMESTAMP)
        for alert in deleted_exe.detect(state, cfg)
    ]
    if go_alerts != python_alerts:
        print("Go/Python alert parity mismatch", file=sys.stderr)
        print(json.dumps({"go": go_alerts, "python": python_alerts}, indent=2), file=sys.stderr)
        return 1

    status_events = [record for record in go_events if record["event_type"] == "status"]
    if len(status_events) != 1 or status_events[0].get("schema") != "enodia.event.v1":
        print("Go sidecar did not emit one enodia.event.v1 status record", file=sys.stderr)
        return 1
    status = status_events[0].get("status", {})
    if status.get("schema") != "enodia.status.v1" or status.get("version") != __version__:
        print("Go status schema/version drifted from Python", file=sys.stderr)
        return 1
    print(f"parity ok: {len(go_alerts)} deleted_exe alert events")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())