"""Section photo vision disk cache."""

from __future__ import annotations

import json
from pathlib import Path

import pytest

from app.services.photo_vision import (
    _read_vision_cache,
    _vision_cache_path,
    _write_vision_cache,
    invalidate_section_photo_vision_cache,
)


def test_vision_cache_roundtrip(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr("app.services.photo_vision.settings.upload_dir", tmp_path / "uploads")
    path = _vision_cache_path("t1", "r1", "E1")
    _write_vision_cache(
        path,
        photo_ids=["a", "b"],
        observations=["Crack in render"],
        note=None,
    )
    out = _read_vision_cache(path, photo_ids=["b", "a"])
    assert out is not None
    obs, note = out
    assert obs == ["Crack in render"]
    assert note is None


def test_vision_cache_invalidates_on_photo_set_change(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr("app.services.photo_vision.settings.upload_dir", tmp_path / "uploads")
    path = _vision_cache_path("t1", "r1", "E1")
    _write_vision_cache(path, photo_ids=["a"], observations=["x"], note=None)
    assert _read_vision_cache(path, photo_ids=["a", "b"]) is None


def test_invalidate_removes_cache(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setattr("app.services.photo_vision.settings.upload_dir", tmp_path / "uploads")
    path = _vision_cache_path("t1", "r1", "E1")
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(json.dumps({"photo_ids": []}), encoding="utf-8")
    invalidate_section_photo_vision_cache("t1", "r1", "E1")
    assert not path.is_file()