"""TTL-aware cache tests (isolated file via MDNS_CACHE_PATH)."""
import importlib
import time


def _fresh_cache(tmp_path, monkeypatch):
    monkeypatch.setenv("MDNS_CACHE_PATH", str(tmp_path / "hosts.json"))
    from mdns_tools import cache
    importlib.reload(cache)
    return cache


def test_put_get_roundtrip(tmp_path, monkeypatch):
    cache = _fresh_cache(tmp_path, monkeypatch)
    cache.put("dell.local", "192.168.1.17", ttl=120)
    assert cache.get("dell.local") == "192.168.1.17"


def test_expired_returns_none_but_stale_available(tmp_path, monkeypatch):
    cache = _fresh_cache(tmp_path, monkeypatch)
    cache.put("x.local", "10.0.0.1", ttl=30)
    # Force expiry by rewriting with a past timestamp.
    data = cache._load()
    data["x.local|v4"]["expires"] = time.time() - 1
    cache._save(data)
    assert cache.get("x.local") is None
    assert cache.get_stale("x.local") == "10.0.0.1"


def test_families_are_separate(tmp_path, monkeypatch):
    cache = _fresh_cache(tmp_path, monkeypatch)
    cache.put("h.local", "192.168.1.9", family="v4")
    cache.put("h.local", "fe80::9", family="v6")
    assert cache.get("h.local", "v4") == "192.168.1.9"
    assert cache.get("h.local", "v6") == "fe80::9"


def test_clear_specific_host(tmp_path, monkeypatch):
    cache = _fresh_cache(tmp_path, monkeypatch)
    cache.put("a.local", "1.1.1.1")
    cache.put("b.local", "2.2.2.2")
    assert cache.clear("a.local") == 1
    assert cache.get("a.local") is None
    assert cache.get("b.local") == "2.2.2.2"


def test_ttl_clamped_to_minimum(tmp_path, monkeypatch):
    cache = _fresh_cache(tmp_path, monkeypatch)
    cache.put("c.local", "3.3.3.3", ttl=1)  # below floor
    assert cache.all_entries()["c.local|v4"]["ttl"] >= 30