import json
from pathlib import Path

from ylff.utils.dataset_layout import discover_capture_bundles, validate_paths_exist


def test_discover_capture_bundles_finds_manifest_dirs(tmp_path: Path):
    b1 = tmp_path / "b1"
    b2 = tmp_path / "b2"
    b1.mkdir()
    b2.mkdir()
    (b1 / "manifest.json").write_text(json.dumps({"schema_version": "1.0", "capture_id": "x"}))
    (b2 / "manifest.json").write_text(json.dumps({"schema_version": "1.0", "capture_id": "y"}))

    found = discover_capture_bundles(tmp_path)
    assert found == [b1, b2]


def test_validate_paths_exist_reports_missing(tmp_path: Path):
    (tmp_path / "exists.txt").write_text("ok")
    errors = validate_paths_exist(tmp_path, ["exists.txt", "missing.txt", None, ""])
    assert any("missing.txt" in e for e in errors)
    assert not any("exists.txt" in e for e in errors)