import json
import subprocess

from scripts import failover_monitor as monitor


def test_check_health_reports_online(monkeypatch):
    def fake_check_call(cmd, stdout=None):
        assert cmd[:4] == ["ping", "-c", "1", "-W"]
        return 0

    monkeypatch.setattr(monitor.subprocess, "check_call", fake_check_call)
    assert monitor.check_health("1.2.3.4") == "ONLINE"


def test_check_health_reports_offline(monkeypatch):
    def fake_check_call(cmd, stdout=None):
        raise subprocess.CalledProcessError(returncode=1, cmd=cmd)

    monkeypatch.setattr(monitor.subprocess, "check_call", fake_check_call)
    assert monitor.check_health("1.2.3.4") == "OFFLINE"


def test_main_writes_status_file_and_prints(tmp_path, monkeypatch, capsys):
    monkeypatch.setattr(monitor, "STATUS_FILE", tmp_path / "failover_status.json")
    monkeypatch.setattr(monitor, "FLEET", {"ezra": "1.1.1.1", "bezalel": "2.2.2.2"})
    monkeypatch.setattr(monitor.time, "time", lambda: 1713148800.0)
    monkeypatch.setattr(
        monitor,
        "check_health",
        lambda host: "ONLINE" if host == "1.1.1.1" else "OFFLINE",
    )

    monitor.main()

    payload = json.loads(monitor.STATUS_FILE.read_text())
    assert payload == {
        "timestamp": 1713148800.0,
        "fleet": {"ezra": "ONLINE", "bezalel": "OFFLINE"},
    }

    captured = capsys.readouterr()
    assert "ALLEGRO FAILOVER MONITOR" in captured.out.upper()
    assert "EZRA: ONLINE" in captured.out
    assert "BEZALEL: OFFLINE" in captured.out