# SPDX-License-Identifier: MIT
"""Tests for winpodx.core.checks — health probes feed `winpodx check` + GUI."""

from __future__ import annotations

import pytest

from winpodx.core import checks
from winpodx.core.checks import Probe


def test_probe_dataclass_is_immutable():
    p = Probe(name="x", status="ok", detail="d", duration_ms=1)
    with pytest.raises(Exception):
        p.status = "fail"  # type: ignore[misc]


def test_probe_is_ok_property():
    assert Probe("x", "ok", "", 0).is_ok
    assert not Probe("x", "warn", "", 0).is_ok
    assert not Probe("x", "fail", "", 0).is_ok
    assert not Probe("x", "skip", "", 0).is_ok


def test_overall_all_ok():
    probes = [Probe("a", "ok", "", 0), Probe("b", "ok", "", 0)]
    assert checks.overall(probes) == "ok"


def test_overall_warn_wins_over_ok():
    probes = [Probe("a", "ok", "", 0), Probe("b", "warn", "", 0)]
    assert checks.overall(probes) == "warn"


def test_overall_fail_wins_over_everything():
    probes = [Probe("a", "ok", "", 0), Probe("b", "warn", "", 0), Probe("c", "fail", "", 0)]
    assert checks.overall(probes) == "fail"


def test_overall_skip_treated_as_neutral():
    """A skip should not pull the verdict away from ok."""
    probes = [Probe("a", "ok", "", 0), Probe("b", "skip", "", 0)]
    assert checks.overall(probes) == "ok"


def test_overall_empty_iterable():
    assert checks.overall([]) == "ok"


def test_probe_never_raises_on_internal_exception():
    """The _timed wrapper must catch any exception and surface as fail.

    A buggy probe should NOT take down `winpodx check` for the whole
    user — kernalix7's UI freezing on a transient AgentClient bug was
    exactly this class of regression.
    """

    def boom(_cfg) -> Probe:
        raise RuntimeError("simulated")

    # The probe wrapper inside checks.py wraps each function; for an
    # external function we apply _timed directly to verify the contract.
    status, detail, ms = checks._timed(lambda: (_ for _ in ()).throw(RuntimeError("boom")))
    assert status == "fail"
    assert "boom" in detail or "RuntimeError" in detail
    assert ms >= 0


def test_run_all_returns_one_probe_per_registered_function(monkeypatch):
    """run_all must call every probe in PROBES and return a Probe for each."""
    fake_cfg = object()
    fake_probes = [Probe(f"p{i}", "ok", f"detail-{i}", i) for i, _ in enumerate(checks.PROBES)]

    monkeypatch.setattr(checks, "PROBES", tuple(lambda _cfg, n=p: n for p in fake_probes))
    out = checks.run_all(fake_cfg)
    assert len(out) == len(fake_probes)
    assert all(isinstance(p, Probe) for p in out)


def test_run_all_skips_exec_probes_when_agent_health_not_ok(monkeypatch):
    fake_cfg = object()
    called: list[str] = []

    def pod(_cfg):
        return Probe("pod_running", "ok", "running", 1)

    def rdp(_cfg):
        return Probe("rdp_port", "ok", "rdp", 1)

    def agent(_cfg):
        return Probe("agent_health", "warn", "agent warming up", 1)

    def auth(_cfg):
        called.append("auth")
        return Probe("agent_auth_ready", "ok", "token", 1)

    def guest_exec(_cfg):
        called.append("exec")
        return Probe("guest_exec", "ok", "exec", 1)

    def guest_summary(_cfg):
        called.append("summary")
        return Probe("guest_summary", "ok", "summary", 1)

    monkeypatch.setattr(checks, "probe_agent_auth_ready", auth)
    monkeypatch.setattr(checks, "probe_guest_exec", guest_exec)
    monkeypatch.setattr(checks, "probe_guest_summary", guest_summary)
    monkeypatch.setattr(
        checks,
        "PROBES",
        (
            pod,
            rdp,
            agent,
            checks.probe_agent_auth_ready,
            checks.probe_guest_exec,
            checks.probe_guest_summary,
        ),
    )

    out = checks.run_all(fake_cfg)

    by_name = {p.name: p for p in out}
    assert by_name["agent_auth_ready"].status == "skip"
    assert by_name["guest_exec"].status == "skip"
    assert by_name["guest_summary"].status == "skip"
    assert called == []


def test_run_all_skips_exec_probes_when_auth_not_ready(monkeypatch):
    fake_cfg = object()
    called: list[str] = []

    def pod(_cfg):
        return Probe("pod_running", "ok", "running", 1)

    def rdp(_cfg):
        return Probe("rdp_port", "ok", "rdp", 1)

    def agent(_cfg):
        return Probe("agent_health", "ok", "version=x", 1)

    def auth(_cfg):
        return Probe("agent_auth_ready", "fail", "token missing", 1)

    def guest_exec(_cfg):
        called.append("exec")
        return Probe("guest_exec", "ok", "exec", 1)

    monkeypatch.setattr(checks, "probe_agent_auth_ready", auth)
    monkeypatch.setattr(checks, "probe_guest_exec", guest_exec)
    monkeypatch.setattr(
        checks,
        "PROBES",
        (pod, rdp, agent, checks.probe_agent_auth_ready, checks.probe_guest_exec),
    )

    out = checks.run_all(fake_cfg)

    by_name = {p.name: p for p in out}
    assert by_name["agent_auth_ready"].status == "fail"
    assert by_name["guest_exec"].status == "skip"
    assert called == []


def test_probe_pod_running_handles_pod_status_failure(monkeypatch):
    """If pod_status raises, the probe must return fail, not propagate."""
    import winpodx.core.pod as pod_mod

    def boom(_cfg):
        raise RuntimeError("backend gone")

    monkeypatch.setattr(pod_mod, "pod_status", boom)
    out = checks.probe_pod_running(_FakeCfg())
    assert out.name == "pod_running"
    assert out.status == "fail"
    assert "backend gone" in out.detail or "RuntimeError" in out.detail


def test_probe_password_age_skip_when_disabled():
    cfg = _FakeCfg()
    cfg.rdp.password_max_age = 0
    out = checks.probe_password_age(cfg)
    assert out.status == "skip"


def test_probe_password_age_warn_when_no_timestamp():
    cfg = _FakeCfg()
    cfg.rdp.password_max_age = 7
    cfg.rdp.password_updated = ""
    out = checks.probe_password_age(cfg)
    assert out.status == "warn"


def test_probe_password_age_warn_when_overdue():
    cfg = _FakeCfg()
    cfg.rdp.password_max_age = 1
    cfg.rdp.password_updated = "2020-01-01T00:00:00+00:00"
    out = checks.probe_password_age(cfg)
    assert out.status == "warn"
    assert "overdue" in out.detail


def test_probe_guest_exec_skip_when_pod_not_running(monkeypatch):
    """When the pod isn't running, the round-trip probe must skip rather than
    fail — every guest probe would red-X otherwise and drown out the actual
    "pod is down" signal."""
    import winpodx.core.pod as pod_mod
    from winpodx.core.pod import PodState, PodStatus

    monkeypatch.setattr(pod_mod, "pod_status", lambda _cfg: PodStatus(state=PodState.STOPPED))
    out = checks.probe_guest_exec(_FakeCfg())
    assert out.status == "skip"
    assert "pod" in out.detail.lower()


def test_probe_guest_summary_skip_when_pod_not_running(monkeypatch):
    import winpodx.core.pod as pod_mod
    from winpodx.core.pod import PodState, PodStatus

    monkeypatch.setattr(pod_mod, "pod_status", lambda _cfg: PodStatus(state=PodState.STOPPED))
    out = checks.probe_guest_summary(_FakeCfg())
    assert out.status == "skip"


def test_probe_guest_exec_fail_when_agent_unreachable(monkeypatch):
    """When the pod IS running but agent is down, the probe must fail with
    a useful detail — proves the round-trip channel is broken even though
    the container is up."""
    import winpodx.core.pod as pod_mod
    from winpodx.core.agent import AgentUnavailableError
    from winpodx.core.pod import PodState, PodStatus

    monkeypatch.setattr(pod_mod, "pod_status", lambda _cfg: PodStatus(state=PodState.RUNNING))

    class _FakeClient:
        def __init__(self, _cfg) -> None:
            pass

        def exec(self, *_a, **_k):
            raise AgentUnavailableError("connection refused")

    monkeypatch.setattr("winpodx.core.agent.AgentClient", _FakeClient)
    out = checks.probe_guest_exec(_FakeCfg())
    assert out.status == "fail"
    assert "connection refused" in out.detail


def test_probe_agent_auth_ready_ok(monkeypatch):
    class _FakeClient:
        def __init__(self, _cfg) -> None:
            pass

        def auth_ready(self):
            return True, ""

    monkeypatch.setattr("winpodx.core.agent.AgentClient", _FakeClient)
    out = checks.probe_agent_auth_ready(_FakeCfg())
    assert out.status == "ok"


def test_probe_agent_auth_ready_fail(monkeypatch):
    class _FakeClient:
        def __init__(self, _cfg) -> None:
            pass

        def auth_ready(self):
            return False, "agent token file missing"

    monkeypatch.setattr("winpodx.core.agent.AgentClient", _FakeClient)
    out = checks.probe_agent_auth_ready(_FakeCfg())
    assert out.status == "fail"
    assert "token" in out.detail


def test_probe_agent_health_timeout_is_warmup_warn(monkeypatch):
    from winpodx.core.agent import AgentTimeoutError

    class _FakeClient:
        def __init__(self, _cfg) -> None:
            pass

        def health(self):
            raise AgentTimeoutError("/health timed out after 2.0s")

    monkeypatch.setattr("winpodx.core.agent.AgentClient", _FakeClient)
    out = checks.probe_agent_health(_FakeCfg())
    assert out.status == "warn"
    assert "warming up" in out.detail


def test_probe_guest_exec_timeout_is_warmup_warn(monkeypatch):
    import winpodx.core.pod as pod_mod
    from winpodx.core.agent import AgentTimeoutError
    from winpodx.core.pod import PodState, PodStatus

    monkeypatch.setattr(pod_mod, "pod_status", lambda _cfg: PodStatus(state=PodState.RUNNING))

    class _FakeClient:
        def __init__(self, _cfg) -> None:
            pass

        def exec(self, *_a, **_k):
            raise AgentTimeoutError("/exec timed out after 9.0s")

    monkeypatch.setattr("winpodx.core.agent.AgentClient", _FakeClient)
    out = checks.probe_guest_exec(_FakeCfg())
    assert out.status == "warn"
    assert "warming up" in out.detail


def test_probe_guest_summary_timeout_is_warmup_warn(monkeypatch):
    import winpodx.core.pod as pod_mod
    from winpodx.core.agent import AgentTimeoutError
    from winpodx.core.pod import PodState, PodStatus

    monkeypatch.setattr(pod_mod, "pod_status", lambda _cfg: PodStatus(state=PodState.RUNNING))

    class _FakeClient:
        def __init__(self, _cfg) -> None:
            pass

        def exec(self, *_a, **_k):
            raise AgentTimeoutError("/exec timed out after 14.0s")

    monkeypatch.setattr("winpodx.core.agent.AgentClient", _FakeClient)
    out = checks.probe_guest_summary(_FakeCfg())
    assert out.status == "warn"
    assert "warming up" in out.detail


def test_probe_apps_discovered_warn_on_missing_dir(tmp_path, monkeypatch):
    monkeypatch.setattr("winpodx.core.discovery.discovered_apps_dir", lambda: tmp_path / "missing")
    out = checks.probe_apps_discovered(_FakeCfg())
    assert out.status == "warn"
    assert "no apps" in out.detail.lower()


def test_probe_apps_discovered_ok_with_app_subdirs(tmp_path, monkeypatch):
    apps_dir = tmp_path / "discovered"
    apps_dir.mkdir()
    for slug in ("notepad", "msedge"):
        (apps_dir / slug).mkdir()
        (apps_dir / slug / "app.toml").write_text("name = '" + slug + "'\n")
    monkeypatch.setattr("winpodx.core.discovery.discovered_apps_dir", lambda: apps_dir)
    out = checks.probe_apps_discovered(_FakeCfg())
    assert out.status == "ok"
    assert "2 app(s)" in out.detail


# --- Helpers ---


class _FakeCfg:
    """Minimal stand-in for Config — only the fields probes touch."""

    class _Pod:
        backend = "podman"

    class _Rdp:
        ip = "127.0.0.1"
        port = 3390
        password = "x"
        password_max_age = 0
        password_updated = ""

    def __init__(self):
        self.pod = self._Pod()
        self.rdp = self._Rdp()