"""download_models tests. No network in CI; we test the 'already present →
skip' short-circuit by faking the expected files, and that main() wires the
SigLIP fetch. (Camie download retired with the tagger, #1199.)
"""

from unittest.mock import patch

from backend.app.scripts import download_models as dm


def test_ensure_siglip_skips_when_present(tmp_path, monkeypatch):
    monkeypatch.setattr(dm, "MODEL_ROOT", tmp_path)
    sig = tmp_path / "siglip"
    sig.mkdir(parents=True)
    (sig / "config.json").write_text("{}")
    (sig / "model.safetensors").write_bytes(b"x")
    with patch.object(dm, "_snapshot") as snap:
        dm.ensure_siglip()
        snap.assert_not_called()


def test_ensure_siglip_downloads_when_missing(tmp_path, monkeypatch):
    monkeypatch.setattr(dm, "MODEL_ROOT", tmp_path)
    with patch.object(dm, "_snapshot") as snap:
        dm.ensure_siglip()
        snap.assert_called_once()


def test_main_fetches_siglip(monkeypatch):
    calls = []
    monkeypatch.setattr(dm, "ensure_siglip", lambda: calls.append("siglip"))
    assert dm.main() == 0
    assert calls == ["siglip"]
