"""Tests for gateway runtime status tracking."""

import json
import os

from gateway import status


class TestGatewayPidState:
    def test_write_pid_file_records_gateway_metadata(self, tmp_path, monkeypatch):
        monkeypatch.setenv("HERMES_HOME", str(tmp_path))

        status.write_pid_file()

        payload = json.loads((tmp_path / "gateway.pid").read_text())
        assert payload["pid"] == os.getpid()
        assert payload["kind"] == "hermes-gateway"
        assert isinstance(payload["argv"], list)
        assert payload["argv"]

    def test_get_running_pid_rejects_live_non_gateway_pid(self, tmp_path, monkeypatch):
        monkeypatch.setenv("HERMES_HOME", str(tmp_path))
        pid_path = tmp_path / "gateway.pid"
        pid_path.write_text(str(os.getpid()))

        assert status.get_running_pid() is None
        assert not pid_path.exists()